Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300
1. The document discusses key principles of electromagnetic radiation and antenna fundamentals, including: principles of EM fields, propagation modes, antenna characterization methods, and factors that determine antenna performance such as polarization, gain, beamwidth.
2. It introduces common antenna types like dipole and discusses how antenna design balances factors like directivity, bandwidth, and radiation pattern.
3. Testing methods are outlined to characterize antennas and adjust transmitters/receivers without interfering radiation.
This document discusses key concepts related to electromagnetic radiation and antenna characterization. It begins with an overview of the principles of EM radiation and how moving electric and magnetic fields produce EM waves. It then covers propagation of EM waves along wires and the use of dipole antennas to transmit radiation through standing wave resonance. The document also introduces different antenna types and polarization, as well as the major modes of propagation including ground waves, sky waves, space waves, and satellite waves. It concludes with a discussion of antenna characterization through far-field radiation pattern measurements and the use of polar plots to visualize antenna gain.
This document discusses radio transmitters and receivers. It explains that a radio transmitter consists of an oscillator that generates a carrier wave, a modulator that adds information to the carrier wave, an amplifier that increases the power of the modulated signal, and an antenna that radiates the signal as radio waves. A radio receiver uses an antenna to capture radio waves, a tuner to select the desired frequency, a detector to extract the information from the carrier wave, and amplifiers to strengthen the signal for playback. Modulation involves adding an input signal to a carrier wave to transmit information in a way that requires less power and antenna size than transmitting the input signal directly.
The document discusses electromagnetic waves and their properties. Some key points:
1) Electromagnetic waves consist of oscillating electric and magnetic fields perpendicular to each other and perpendicular to the direction of wave propagation.
2) Both the electric and magnetic fields of an electromagnetic wave are transverse to the direction of wave propagation.
3) Electromagnetic waves include radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. They differ in wavelength and frequency.
The document discusses wireless power transmission and summarizes several key topics:
1. It outlines the history of wireless power transmission from Nikola Tesla's experiments to modern solar power satellite concepts.
2. It explains the theory behind wireless power transmission including electromagnetic radiation, phased array antennas, and rectennas.
3. It summarizes several major research projects on wireless power transmission including experiments transmitting power to satellites and concepts for solar power satellites.
4. It compares the efficiency and costs of wireless power transmission to other power sources such as ground-based solar, nuclear, and fossil fuels.
The document discusses the fundamentals of antennas. It begins with a brief history of antennas dating back to Faraday's experiments in the 1830s. It then provides an overview of common antenna types including Yagi-Uda antennas from the 1920s, horn antennas from 1939, antenna arrays from the 1940s, parabolic reflectors, and patch antennas from the 1970s. The document concludes by defining key antenna parameters such as frequency, radiation patterns, field regions, directivity, efficiency, gain, beamwidths, and side lobes that are important for understanding antenna operation and design.
01_AME_U1_INTRODUCTION AND MICROWAVE FREQUENCY BANDS.pptxMrEmmanuelA
UNIT I introduces microwave systems and antennas. It discusses microwave frequency bands from 1 GHz to 300 GHz and key antenna concepts like near and far fields, gain, efficiency, impedance matching, and the Friis transmission equation. The unit also covers antenna pattern characteristics, radiated power and fields, and antenna noise temperature.
UNIT I provides an overview of key topics in microwave engineering and antenna fundamentals, including microwave frequency bands, antenna radiation mechanisms, near and far-field regions, antenna parameters like gain and pattern characteristics, impedance matching concepts, and noise modeling of microwave systems.
Electricity and magnetism are different facets of electromagnetism
a moving electric charge produces magnetic fields
changing magnetic fields move electric charges
This connection first elucidated by Faraday, Maxwell
Einstein saw electricity and magnetism as frame-dependent facets of unified electromagnetic force
1. The document discusses key principles of electromagnetic radiation and antenna fundamentals, including: principles of EM fields, propagation modes, antenna characterization methods, and factors that determine antenna performance such as polarization, gain, beamwidth.
2. It introduces common antenna types like dipole and discusses how antenna design balances factors like directivity, bandwidth, and radiation pattern.
3. Testing methods are outlined to characterize antennas and adjust transmitters/receivers without interfering radiation.
This document discusses key concepts related to electromagnetic radiation and antenna characterization. It begins with an overview of the principles of EM radiation and how moving electric and magnetic fields produce EM waves. It then covers propagation of EM waves along wires and the use of dipole antennas to transmit radiation through standing wave resonance. The document also introduces different antenna types and polarization, as well as the major modes of propagation including ground waves, sky waves, space waves, and satellite waves. It concludes with a discussion of antenna characterization through far-field radiation pattern measurements and the use of polar plots to visualize antenna gain.
This document discusses radio transmitters and receivers. It explains that a radio transmitter consists of an oscillator that generates a carrier wave, a modulator that adds information to the carrier wave, an amplifier that increases the power of the modulated signal, and an antenna that radiates the signal as radio waves. A radio receiver uses an antenna to capture radio waves, a tuner to select the desired frequency, a detector to extract the information from the carrier wave, and amplifiers to strengthen the signal for playback. Modulation involves adding an input signal to a carrier wave to transmit information in a way that requires less power and antenna size than transmitting the input signal directly.
The document discusses electromagnetic waves and their properties. Some key points:
1) Electromagnetic waves consist of oscillating electric and magnetic fields perpendicular to each other and perpendicular to the direction of wave propagation.
2) Both the electric and magnetic fields of an electromagnetic wave are transverse to the direction of wave propagation.
3) Electromagnetic waves include radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. They differ in wavelength and frequency.
The document discusses wireless power transmission and summarizes several key topics:
1. It outlines the history of wireless power transmission from Nikola Tesla's experiments to modern solar power satellite concepts.
2. It explains the theory behind wireless power transmission including electromagnetic radiation, phased array antennas, and rectennas.
3. It summarizes several major research projects on wireless power transmission including experiments transmitting power to satellites and concepts for solar power satellites.
4. It compares the efficiency and costs of wireless power transmission to other power sources such as ground-based solar, nuclear, and fossil fuels.
The document discusses the fundamentals of antennas. It begins with a brief history of antennas dating back to Faraday's experiments in the 1830s. It then provides an overview of common antenna types including Yagi-Uda antennas from the 1920s, horn antennas from 1939, antenna arrays from the 1940s, parabolic reflectors, and patch antennas from the 1970s. The document concludes by defining key antenna parameters such as frequency, radiation patterns, field regions, directivity, efficiency, gain, beamwidths, and side lobes that are important for understanding antenna operation and design.
01_AME_U1_INTRODUCTION AND MICROWAVE FREQUENCY BANDS.pptxMrEmmanuelA
UNIT I introduces microwave systems and antennas. It discusses microwave frequency bands from 1 GHz to 300 GHz and key antenna concepts like near and far fields, gain, efficiency, impedance matching, and the Friis transmission equation. The unit also covers antenna pattern characteristics, radiated power and fields, and antenna noise temperature.
UNIT I provides an overview of key topics in microwave engineering and antenna fundamentals, including microwave frequency bands, antenna radiation mechanisms, near and far-field regions, antenna parameters like gain and pattern characteristics, impedance matching concepts, and noise modeling of microwave systems.
Electricity and magnetism are different facets of electromagnetism
a moving electric charge produces magnetic fields
changing magnetic fields move electric charges
This connection first elucidated by Faraday, Maxwell
Einstein saw electricity and magnetism as frame-dependent facets of unified electromagnetic force
This document discusses electromagnetism and electromagnetic induction. It explains that electricity and magnetism are two aspects of the same electromagnetic force. Michael Faraday and James Clerk Maxwell first established the connection between changing magnetic fields producing electric currents and changing electric fields producing magnetic fields. The document provides examples of how electric currents produce magnetic fields and how electromagnets work. It also discusses electromagnetic induction discovered by Faraday and how changing magnetic fields induce electric currents. The document concludes by discussing electromagnetic radiation and the electromagnetic spectrum.
This document discusses electromagnetism and electromagnetic induction. It explains that electricity and magnetism are two aspects of electromagnetism, with changing electric fields producing magnetic fields and vice versa. This connection was first established by Faraday and Maxwell. Various applications of electromagnetic waves are covered, including radio waves, microwaves, infrared, visible light, X-rays, and gamma rays. The document also discusses how changing magnetic fields can induce electric currents and the generation and reception of radio waves through oscillating electric charges and antennas.
This document discusses electromagnetism and electromagnetic induction. It explains that electricity and magnetism are two aspects of electromagnetism, with changing electric fields producing magnetic fields and vice versa. This connection was first established by Faraday and Maxwell. Various applications of electromagnetic waves are covered, including radio waves, microwaves, infrared, visible light, X-rays, and gamma rays. The document also discusses how changing magnetic fields can induce electric currents and the generation and reception of radio waves through oscillating electric charges and antennas.
This document discusses electromagnetism and electromagnetic induction. It explains that electricity and magnetism are two aspects of electromagnetism, with changing magnetic fields producing electric currents and vice versa. This connection was first established by Faraday and Maxwell. Various applications of electromagnetic waves are covered, including radio waves, microwaves, infrared, visible light, X-rays, and gamma rays. The document also discusses how changing electric and magnetic fields propagate through space as electromagnetic radiation traveling at the speed of light.
This document discusses electromagnetism and electromagnetic induction. It explains that electricity and magnetism are two aspects of electromagnetism, with changing magnetic fields producing electric currents and vice versa. This connection was first established by Faraday and Maxwell. Various applications of electromagnetic waves are covered, including radio waves, microwaves, infrared, visible light, X-rays, and gamma rays. The document also discusses how changing electric and magnetic fields propagate through space as electromagnetic radiation traveling at the speed of light.
This document discusses electromagnetism and electromagnetic induction. It explains that electricity and magnetism are two aspects of electromagnetism, with changing electric fields producing magnetic fields and vice versa. This connection was first established by Faraday and Maxwell. Various applications of electromagnetic waves are covered, including radio waves, microwaves, infrared, visible light, X-rays, and gamma rays. The document also discusses how changing magnetic fields can induce electric currents and the generation and reception of radio waves through oscillating electric charges and antennas.
This document summarizes a presentation on wireless power transmission. It begins with an introduction discussing increasing global energy demand and the limitations of fossil fuels. It then covers the history of wireless power transmission experiments dating back to Nikola Tesla in the late 1800s. Several major research projects are discussed, including US studies from the 1970s-2000s and recent Japanese efforts to develop a solar-powered satellite capable of transmitting 1GW of power by 2040. Key concepts around the theory of wireless power transmission using microwave beams and large rectifying antennas (rectennas) are also explained through diagrams and calculations.
This document provides an overview of electromagnetism and electromagnetic waves. It discusses how electric and magnetic fields are interrelated and how changing one field produces the other. Michael Faraday and James Clerk Maxwell helped elucidate this connection. The document then covers topics like electromagnetic induction, electromagnets, induced currents, and electromagnetic radiation. It notes that all electromagnetic waves travel at the speed of light and provides examples like radio waves, microwaves, infrared, light, x-rays, and gamma rays. The document concludes by discussing generation and reception of radio waves using oscillating charges and antennas.
Microwave frequency bands range from 1 GHz to 1000 GHz with wavelengths between 30 cm and 0.03 cm. They are used in both military and civilian applications. An antenna is an electrical conductor that transmits electromagnetic energy into space from a transmission line and receives electromagnetic energy from space to induce currents in a receiver. Antennas work by coupling electromagnetic waves between guided transmission line waves and free space waves.
Electromagnetism describes the interactions between electric and magnetic fields. Michael Faraday and James Clerk Maxwell first established that changing magnetic fields produce electric currents and changing electric fields produce magnetic fields. Maxwell showed that oscillating electric and magnetic fields propagate as electromagnetic waves, including radio waves, visible light, and others. All electromagnetic waves travel at the speed of light and have characteristics determined by their frequency or wavelength.
Microwaves are electromagnetic waves with frequencies between 300MHz- 300GHz. Microwave communication uses microwave towers to transmit signals over long distances via line-of-sight. Key applications of microwaves include communication systems, satellite systems, radar for target detection, microwave heating for cooking and industrial processes, and microwave spectroscopy for materials analysis. Microwaves have advantages over lower frequencies including smaller antenna size, ability to penetrate some materials, and providing larger bandwidth for more channels in communication.
This document provides an overview of antennas, including:
- Antennas are devices that radiate or receive radio frequency (RF) signals. Common antennas range from simple single wires to complex dishes.
- Antenna behavior is the same whether transmitting or receiving due to the reciprocity principle. However, how it's used and the attached electronics determine transmission or reception.
- Important antenna characteristics that impact performance include radiated/received power, gain, wavelength, polarization, distance, and bandwidth. The Friis transmission formula relates these factors for antenna systems.
This document provides an overview of antennas, including:
- Antennas are devices that radiate or receive radio frequency (RF) signals. Common antennas range from simple single wires to complex dishes.
- Antenna behavior is the same whether transmitting or receiving due to the reciprocity principle. However, performance depends on how it's used and the connected electronics.
- Antenna gain is a measure of power radiated in a given direction compared to an isotropic antenna. Higher gain antennas focus power into narrower beams.
- Common antenna types include half-wave dipoles and quarter-wave Marconi antennas. Coaxial cables are often used to connect asymmetric antennas like dipoles to electronics.
1) The document discusses various topics related to wireless communication channels including antenna types, radiation patterns, propagation modes, and sources of noise.
2) Key antenna types discussed are isotropic antennas, dipole antennas, parabolic reflective antennas, and directional antenna arrays.
3) Propagation modes covered include ground-wave, sky-wave, and line-of-sight propagation.
4) Sources of noise and interference addressed include thermal noise, intermodulation noise, crosstalk, and impulse noise.
Radio waves and propagation and astronomyNayem Uddin
Radio waves are a type of electromagnetic radiation that have wavelengths in the electromagnetic spectrum. They can travel at the speed of light and have different frequencies and propagation properties depending on their wavelength. Radio waves were first predicted by Maxwell and demonstrated by Hertz in the late 1800s. They are now used for various technologies like radio, television, wireless networks, GPS, and more. International organizations like ITU regulate radio wave usage through frequency allocation and regional guidelines.
Basic radio Principles, Electromagnetic SpectrumSubhashMSubhash
Basic Radio Principles, Electromagnetic Spectrum and Components of Communication System
1. The document discusses basic radio principles including wave properties, types of mechanical waves, and the electromagnetic spectrum. 2. It also covers the basic components of a communication system including transmitters, receivers, antennas, and modulation techniques like amplitude modulation and frequency modulation. 3. Key topics include radio wave generation, applications in avionics, antenna characteristics and types of antennas used in aircraft.
This document provides an overview of basic electronics topics including transmission lines, waveguides, and antenna fundamentals. It discusses the characteristics and applications of transmission lines, advantages of using them to reduce electromagnetic interference, and examples of different types of transmission lines. Waveguides are introduced as an alternative to transmission lines at higher frequencies. Key concepts around waveguides such as applications and the expression for cutoff wavelength are summarized. Finally, the document outlines fundamental concepts relating to antennas such as radiation patterns, efficiency, and gain.
This document discusses radio communication technologies. It explains that radio uses radio waves to communicate over long distances. It describes how modulation works by adding digital or analog sound waves to a carrier wave. It distinguishes between AM and FM modulation and their characteristics. The document also outlines the basic components and process of radio signal transmission from a transmitter to a receiver via antennas, including modulation, amplification and demodulation. It provides examples of radio stations in Madrid.
This document provides an overview of aircraft communication systems. It discusses the history of aircraft radio communication from World War I to modern times. It then describes the basic radio principles of transmission and reception using electromagnetic waves. It outlines the different frequency bands used for aircraft communication and navigation. It explains the main components and functions of transmitters and receivers. It also discusses different antenna types and their use on aircraft. Finally, it provides details on very high frequency (VHF) and high frequency (HF) communication systems, including system diagrams and their applications.
Modulation is the process of varying one or more properties of a high frequency carrier wave in accordance with a modulating signal. This is done to transmit data signals that are not always suitable for direct transmission. There are three main types of modulation: amplitude modulation varies the amplitude of the carrier wave, frequency modulation varies the carrier frequency, and phase modulation varies the carrier phase. Demodulation is the process of extracting the original information-bearing signal from the modulated carrier wave at the receiver. Modulation is necessary because practical antenna lengths require high frequencies for transmission, audio frequencies cannot be transmitted over large distances if radiated directly, and modulated carrier waves have higher energy and operating range than non-modulated audio signals.
KuberTENes Birthday Bash Guadalajara - K8sGPT first impressionsVictor Morales
K8sGPT is a tool that analyzes and diagnoses Kubernetes clusters. This presentation was used to share the requirements and dependencies to deploy K8sGPT in a local environment.
This document discusses electromagnetism and electromagnetic induction. It explains that electricity and magnetism are two aspects of the same electromagnetic force. Michael Faraday and James Clerk Maxwell first established the connection between changing magnetic fields producing electric currents and changing electric fields producing magnetic fields. The document provides examples of how electric currents produce magnetic fields and how electromagnets work. It also discusses electromagnetic induction discovered by Faraday and how changing magnetic fields induce electric currents. The document concludes by discussing electromagnetic radiation and the electromagnetic spectrum.
This document discusses electromagnetism and electromagnetic induction. It explains that electricity and magnetism are two aspects of electromagnetism, with changing electric fields producing magnetic fields and vice versa. This connection was first established by Faraday and Maxwell. Various applications of electromagnetic waves are covered, including radio waves, microwaves, infrared, visible light, X-rays, and gamma rays. The document also discusses how changing magnetic fields can induce electric currents and the generation and reception of radio waves through oscillating electric charges and antennas.
This document discusses electromagnetism and electromagnetic induction. It explains that electricity and magnetism are two aspects of electromagnetism, with changing electric fields producing magnetic fields and vice versa. This connection was first established by Faraday and Maxwell. Various applications of electromagnetic waves are covered, including radio waves, microwaves, infrared, visible light, X-rays, and gamma rays. The document also discusses how changing magnetic fields can induce electric currents and the generation and reception of radio waves through oscillating electric charges and antennas.
This document discusses electromagnetism and electromagnetic induction. It explains that electricity and magnetism are two aspects of electromagnetism, with changing magnetic fields producing electric currents and vice versa. This connection was first established by Faraday and Maxwell. Various applications of electromagnetic waves are covered, including radio waves, microwaves, infrared, visible light, X-rays, and gamma rays. The document also discusses how changing electric and magnetic fields propagate through space as electromagnetic radiation traveling at the speed of light.
This document discusses electromagnetism and electromagnetic induction. It explains that electricity and magnetism are two aspects of electromagnetism, with changing magnetic fields producing electric currents and vice versa. This connection was first established by Faraday and Maxwell. Various applications of electromagnetic waves are covered, including radio waves, microwaves, infrared, visible light, X-rays, and gamma rays. The document also discusses how changing electric and magnetic fields propagate through space as electromagnetic radiation traveling at the speed of light.
This document discusses electromagnetism and electromagnetic induction. It explains that electricity and magnetism are two aspects of electromagnetism, with changing electric fields producing magnetic fields and vice versa. This connection was first established by Faraday and Maxwell. Various applications of electromagnetic waves are covered, including radio waves, microwaves, infrared, visible light, X-rays, and gamma rays. The document also discusses how changing magnetic fields can induce electric currents and the generation and reception of radio waves through oscillating electric charges and antennas.
This document summarizes a presentation on wireless power transmission. It begins with an introduction discussing increasing global energy demand and the limitations of fossil fuels. It then covers the history of wireless power transmission experiments dating back to Nikola Tesla in the late 1800s. Several major research projects are discussed, including US studies from the 1970s-2000s and recent Japanese efforts to develop a solar-powered satellite capable of transmitting 1GW of power by 2040. Key concepts around the theory of wireless power transmission using microwave beams and large rectifying antennas (rectennas) are also explained through diagrams and calculations.
This document provides an overview of electromagnetism and electromagnetic waves. It discusses how electric and magnetic fields are interrelated and how changing one field produces the other. Michael Faraday and James Clerk Maxwell helped elucidate this connection. The document then covers topics like electromagnetic induction, electromagnets, induced currents, and electromagnetic radiation. It notes that all electromagnetic waves travel at the speed of light and provides examples like radio waves, microwaves, infrared, light, x-rays, and gamma rays. The document concludes by discussing generation and reception of radio waves using oscillating charges and antennas.
Microwave frequency bands range from 1 GHz to 1000 GHz with wavelengths between 30 cm and 0.03 cm. They are used in both military and civilian applications. An antenna is an electrical conductor that transmits electromagnetic energy into space from a transmission line and receives electromagnetic energy from space to induce currents in a receiver. Antennas work by coupling electromagnetic waves between guided transmission line waves and free space waves.
Electromagnetism describes the interactions between electric and magnetic fields. Michael Faraday and James Clerk Maxwell first established that changing magnetic fields produce electric currents and changing electric fields produce magnetic fields. Maxwell showed that oscillating electric and magnetic fields propagate as electromagnetic waves, including radio waves, visible light, and others. All electromagnetic waves travel at the speed of light and have characteristics determined by their frequency or wavelength.
Microwaves are electromagnetic waves with frequencies between 300MHz- 300GHz. Microwave communication uses microwave towers to transmit signals over long distances via line-of-sight. Key applications of microwaves include communication systems, satellite systems, radar for target detection, microwave heating for cooking and industrial processes, and microwave spectroscopy for materials analysis. Microwaves have advantages over lower frequencies including smaller antenna size, ability to penetrate some materials, and providing larger bandwidth for more channels in communication.
This document provides an overview of antennas, including:
- Antennas are devices that radiate or receive radio frequency (RF) signals. Common antennas range from simple single wires to complex dishes.
- Antenna behavior is the same whether transmitting or receiving due to the reciprocity principle. However, how it's used and the attached electronics determine transmission or reception.
- Important antenna characteristics that impact performance include radiated/received power, gain, wavelength, polarization, distance, and bandwidth. The Friis transmission formula relates these factors for antenna systems.
This document provides an overview of antennas, including:
- Antennas are devices that radiate or receive radio frequency (RF) signals. Common antennas range from simple single wires to complex dishes.
- Antenna behavior is the same whether transmitting or receiving due to the reciprocity principle. However, performance depends on how it's used and the connected electronics.
- Antenna gain is a measure of power radiated in a given direction compared to an isotropic antenna. Higher gain antennas focus power into narrower beams.
- Common antenna types include half-wave dipoles and quarter-wave Marconi antennas. Coaxial cables are often used to connect asymmetric antennas like dipoles to electronics.
1) The document discusses various topics related to wireless communication channels including antenna types, radiation patterns, propagation modes, and sources of noise.
2) Key antenna types discussed are isotropic antennas, dipole antennas, parabolic reflective antennas, and directional antenna arrays.
3) Propagation modes covered include ground-wave, sky-wave, and line-of-sight propagation.
4) Sources of noise and interference addressed include thermal noise, intermodulation noise, crosstalk, and impulse noise.
Radio waves and propagation and astronomyNayem Uddin
Radio waves are a type of electromagnetic radiation that have wavelengths in the electromagnetic spectrum. They can travel at the speed of light and have different frequencies and propagation properties depending on their wavelength. Radio waves were first predicted by Maxwell and demonstrated by Hertz in the late 1800s. They are now used for various technologies like radio, television, wireless networks, GPS, and more. International organizations like ITU regulate radio wave usage through frequency allocation and regional guidelines.
Basic radio Principles, Electromagnetic SpectrumSubhashMSubhash
Basic Radio Principles, Electromagnetic Spectrum and Components of Communication System
1. The document discusses basic radio principles including wave properties, types of mechanical waves, and the electromagnetic spectrum. 2. It also covers the basic components of a communication system including transmitters, receivers, antennas, and modulation techniques like amplitude modulation and frequency modulation. 3. Key topics include radio wave generation, applications in avionics, antenna characteristics and types of antennas used in aircraft.
This document provides an overview of basic electronics topics including transmission lines, waveguides, and antenna fundamentals. It discusses the characteristics and applications of transmission lines, advantages of using them to reduce electromagnetic interference, and examples of different types of transmission lines. Waveguides are introduced as an alternative to transmission lines at higher frequencies. Key concepts around waveguides such as applications and the expression for cutoff wavelength are summarized. Finally, the document outlines fundamental concepts relating to antennas such as radiation patterns, efficiency, and gain.
This document discusses radio communication technologies. It explains that radio uses radio waves to communicate over long distances. It describes how modulation works by adding digital or analog sound waves to a carrier wave. It distinguishes between AM and FM modulation and their characteristics. The document also outlines the basic components and process of radio signal transmission from a transmitter to a receiver via antennas, including modulation, amplification and demodulation. It provides examples of radio stations in Madrid.
This document provides an overview of aircraft communication systems. It discusses the history of aircraft radio communication from World War I to modern times. It then describes the basic radio principles of transmission and reception using electromagnetic waves. It outlines the different frequency bands used for aircraft communication and navigation. It explains the main components and functions of transmitters and receivers. It also discusses different antenna types and their use on aircraft. Finally, it provides details on very high frequency (VHF) and high frequency (HF) communication systems, including system diagrams and their applications.
Modulation is the process of varying one or more properties of a high frequency carrier wave in accordance with a modulating signal. This is done to transmit data signals that are not always suitable for direct transmission. There are three main types of modulation: amplitude modulation varies the amplitude of the carrier wave, frequency modulation varies the carrier frequency, and phase modulation varies the carrier phase. Demodulation is the process of extracting the original information-bearing signal from the modulated carrier wave at the receiver. Modulation is necessary because practical antenna lengths require high frequencies for transmission, audio frequencies cannot be transmitted over large distances if radiated directly, and modulated carrier waves have higher energy and operating range than non-modulated audio signals.
KuberTENes Birthday Bash Guadalajara - K8sGPT first impressionsVictor Morales
K8sGPT is a tool that analyzes and diagnoses Kubernetes clusters. This presentation was used to share the requirements and dependencies to deploy K8sGPT in a local environment.
Null Bangalore | Pentesters Approach to AWS IAMDivyanshu
#Abstract:
- Learn more about the real-world methods for auditing AWS IAM (Identity and Access Management) as a pentester. So let us proceed with a brief discussion of IAM as well as some typical misconfigurations and their potential exploits in order to reinforce the understanding of IAM security best practices.
- Gain actionable insights into AWS IAM policies and roles, using hands on approach.
#Prerequisites:
- Basic understanding of AWS services and architecture
- Familiarity with cloud security concepts
- Experience using the AWS Management Console or AWS CLI.
- For hands on lab create account on [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
# Scenario Covered:
- Basics of IAM in AWS
- Implementing IAM Policies with Least Privilege to Manage S3 Bucket
- Objective: Create an S3 bucket with least privilege IAM policy and validate access.
- Steps:
- Create S3 bucket.
- Attach least privilege policy to IAM user.
- Validate access.
- Exploiting IAM PassRole Misconfiguration
-Allows a user to pass a specific IAM role to an AWS service (ec2), typically used for service access delegation. Then exploit PassRole Misconfiguration granting unauthorized access to sensitive resources.
- Objective: Demonstrate how a PassRole misconfiguration can grant unauthorized access.
- Steps:
- Allow user to pass IAM role to EC2.
- Exploit misconfiguration for unauthorized access.
- Access sensitive resources.
- Exploiting IAM AssumeRole Misconfiguration with Overly Permissive Role
- An overly permissive IAM role configuration can lead to privilege escalation by creating a role with administrative privileges and allow a user to assume this role.
- Objective: Show how overly permissive IAM roles can lead to privilege escalation.
- Steps:
- Create role with administrative privileges.
- Allow user to assume the role.
- Perform administrative actions.
- Differentiation between PassRole vs AssumeRole
Try at [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
Comparative analysis between traditional aquaponics and reconstructed aquapon...bijceesjournal
The aquaponic system of planting is a method that does not require soil usage. It is a method that only needs water, fish, lava rocks (a substitute for soil), and plants. Aquaponic systems are sustainable and environmentally friendly. Its use not only helps to plant in small spaces but also helps reduce artificial chemical use and minimizes excess water use, as aquaponics consumes 90% less water than soil-based gardening. The study applied a descriptive and experimental design to assess and compare conventional and reconstructed aquaponic methods for reproducing tomatoes. The researchers created an observation checklist to determine the significant factors of the study. The study aims to determine the significant difference between traditional aquaponics and reconstructed aquaponics systems propagating tomatoes in terms of height, weight, girth, and number of fruits. The reconstructed aquaponics system’s higher growth yield results in a much more nourished crop than the traditional aquaponics system. It is superior in its number of fruits, height, weight, and girth measurement. Moreover, the reconstructed aquaponics system is proven to eliminate all the hindrances present in the traditional aquaponics system, which are overcrowding of fish, algae growth, pest problems, contaminated water, and dead fish.
Advanced control scheme of doubly fed induction generator for wind turbine us...IJECEIAES
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
Introduction- e - waste – definition - sources of e-waste– hazardous substances in e-waste - effects of e-waste on environment and human health- need for e-waste management– e-waste handling rules - waste minimization techniques for managing e-waste – recycling of e-waste - disposal treatment methods of e- waste – mechanism of extraction of precious metal from leaching solution-global Scenario of E-waste – E-waste in India- case studies.
International Conference on NLP, Artificial Intelligence, Machine Learning an...gerogepatton
International Conference on NLP, Artificial Intelligence, Machine Learning and Applications (NLAIM 2024) offers a premier global platform for exchanging insights and findings in the theory, methodology, and applications of NLP, Artificial Intelligence, Machine Learning, and their applications. The conference seeks substantial contributions across all key domains of NLP, Artificial Intelligence, Machine Learning, and their practical applications, aiming to foster both theoretical advancements and real-world implementations. With a focus on facilitating collaboration between researchers and practitioners from academia and industry, the conference serves as a nexus for sharing the latest developments in the field.
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...IJECEIAES
Climate change's impact on the planet forced the United Nations and governments to promote green energies and electric transportation. The deployments of photovoltaic (PV) and electric vehicle (EV) systems gained stronger momentum due to their numerous advantages over fossil fuel types. The advantages go beyond sustainability to reach financial support and stability. The work in this paper introduces the hybrid system between PV and EV to support industrial and commercial plants. This paper covers the theoretical framework of the proposed hybrid system including the required equation to complete the cost analysis when PV and EV are present. In addition, the proposed design diagram which sets the priorities and requirements of the system is presented. The proposed approach allows setup to advance their power stability, especially during power outages. The presented information supports researchers and plant owners to complete the necessary analysis while promoting the deployment of clean energy. The result of a case study that represents a dairy milk farmer supports the theoretical works and highlights its advanced benefits to existing plants. The short return on investment of the proposed approach supports the paper's novelty approach for the sustainable electrical system. In addition, the proposed system allows for an isolated power setup without the need for a transmission line which enhances the safety of the electrical network
2. Spring 2006
UCSD: Physics 8; 2006
2
Electromagnetism
• Electricity and magnetism are different facets of
electromagnetism
– recall that a static distribution of charges produces an electric field
– charges in motion (an electrical current) produce a magnetic field
– a changing magnetic field produces an electric field, moving
charges
• Electric and Magnetic fields produce forces on charges
• An accelerating charge produces electromagnetic waves
(radiation)
• Both electric and magnetic fields can transport energy
– Electric field energy used in electrical circuits & released in
lightning
– Magnetic field carries energy through transformer
3. Spring 2006
UCSD: Physics 8; 2006
3
Electromagnetic Radiation
• Interrelated electric and magnetic fields traveling through
space
• All electromagnetic radiation travels at c = 3108 m/s in
vacuum – the cosmic speed limit!
– real number is 299792458.0 m/s exactly
4. Spring 2006
UCSD: Physics 8; 2006
4
Examples of Electromagnetic Radiation
• AM and FM radio waves (including TV signals)
• Cell phone communication links
• Microwaves
• Infrared radiation
• Light
• X-rays
• Gamma rays
• What distinguishes these from one another?
6. Spring 2006
UCSD: Physics 8; 2006
6
The Electromagnetic Spectrum
• Relationship between frequency, speed and
wavelength
f ·l = c
f is frequency, l is wavelength, c is speed of light
• Different frequencies of electromagnetic radiation are
better suited to different purposes
• The frequency of a radio wave determines its
propagation characteristics through various media
7. Spring 2006
UCSD: Physics 8; 2006
7
Generation of Radio Waves
• Accelerating charges radiate EM energy
• If charges oscillate back and forth, get time-varying fields
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8. Spring 2006
UCSD: Physics 8; 2006
8
Generation of Radio Waves
If charges oscillate back and forth, get time-varying magnetic fields too.
Note that the magnetic fields are perpendicular to the electric field vectors
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10. Spring 2006
UCSD: Physics 8; 2006
10
Reception of Radio Waves
Receiving antenna works best
when ‘tuned’ to the
wavelength of the signal, and
has proper polarization
Electrons in antenna are “jiggled”
by passage of electromagnetic wave
E
Optimum antenna length is l/4: one-quarter wavelength
11. Spring 2006
UCSD: Physics 8; 2006
11
Encoding Information on Radio Waves
• What quantities characterize a radio wave?
• Two common ways to carry analog information with
radio waves
– Amplitude Modulation (AM)
– Frequency Modulation (FM): “static free”
12. Spring 2006
UCSD: Physics 8; 2006
12
AM Radio
• Amplitude Modulation (AM) uses changes in the
signal strength to convey information
pressure modulation (sound)
electromagnetic wave
modulation
13. Spring 2006
UCSD: Physics 8; 2006
13
AM Radio in Practice
• Uses frequency range from 530 kHz to 1700 kHz
– each station uses 9 kHz
– spacing is 10 kHz (a little breathing room) 117 channels
– 9 kHz of bandwidth means 4.5 kHz is highest audio
frequency that can be encoded
• falls short of 20 kHz capability of human ear
• Previous diagram is exaggerated:
– audio signal changes slowly with respect to radio carrier
• typical speech sound of 500 Hz varies 1000 times slower than
carrier
• thus will see 1000 cycles of carrier to every one cycle of audio
14. Spring 2006
UCSD: Physics 8; 2006
14
FM Radio
• Frequency Modulation (FM) uses changes in the
wave’s frequency to convey information
pressure modulation (sound)
electromagnetic wave
modulation
15. Spring 2006
UCSD: Physics 8; 2006
15
FM Radio in Practice
• Spans 87.8 MHz to 108.0 MHz in 200 kHz intervals
– 101 possible stations
– example: 91X runs from 91.0–91.2 MHz (centered at 91.1)
• Nominally uses 150 kHz around center
– 75 kHz on each side
– 30 kHz for L + R (mono) 15 kHz audio capability
– 30 kHz offset for stereo difference signal (L - R)
• Again: figure exaggerated
– 75 kHz from band center, modulation is > 1000 times slower
than carrier, so many cycles go by before frequency
noticeably changes
16. Spring 2006
UCSD: Physics 8; 2006
16
AM vs. FM
• FM is not inherently higher frequency than AM
– these are just choices
– aviation band is 108–136 MHz uses AM technique
• Besides the greater bandwidth (leading to stereo and
higher audio frequencies), FM is superior in immunity
to environmental influences
– there are lots of ways to mess with an EM-wave’s amplitude
• pass under a bridge
• re-orient the antenna
– no natural processes mess with the frequency
• FM still works in the face of amplitude foolery
18. Spring 2006
UCSD: Physics 8; 2006
18
Converting back to sound: AM
• AM is easy: just pass the AC signal from the antenna
into a diode
– or better yet, a diode bridge
– then use capacitor to smooth out bumps
• but not so much as to smooth out audio bumps
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radio signal
amplifier/
speaker
19. Spring 2006
UCSD: Physics 8; 2006
19
Converting back to sound: FM
• More sophisticated
– need to compare instantaneous frequency to that of a
reference source
– then produce a voltage proportional to the difference
– Compute L = [(L+R) + (L-R)]/2; R = [(L+R) - (L-R)]/2
– amplify the L and R voltages to send to speakers
• Amplification is common to both schemes
– intrinsic signal is far too weak to drive speaker
20. Spring 2006
UCSD: Physics 8; 2006
20
Assignments
• HW5: 12.E.24, 13.E.13, 13.E.15, 13.E.16, 13.P.7,
13.P.9, 13.P.11, plus additional required problems
available on website