shambhunath institute of engineering and technology

1. Modeling, Simulation and Analysis Of
UWB(Ultra Wid e Band) of Microstrip Patch
Antenna
Presented By:-
Students of EC Final year
Prerna Chaturvedi
Rajshree Kesherwani
Nidhi Pandey
Akash Pandey
Under the Guidance of :
Mr. Vivek Singh

2. OUTLINE
Introduction
Basic Principles of Microstrip Patch antennas
UWB(ultra wide band )
Literary survey
Objective
References
Advantages
Disadvantages
Application
Thank you

3. What is micro-strip patch antenna?
•A micro-strip patch antenna consists
of a radiating patch on one side of a
dielectric substrate which has a ground
plane on the other side .
•It was invented by Bob Munson in
1972 (but earlier work by Dechamts
goes back to 1953)

4. Basic principles of operation
• The patch acts approximately as a
resonant cavity (short circuit walls on top
and bottom, open-circuit walls on the
sides).
• In a cavity only certain modes are
allowed to exist, at different resonant
frequencies.
• If the antenna is excited at the resonant
frequency, a strong field is setup inside
the cavity, and the strong current on
the(bottom)surface of the patch. This
produce significant radiation (a good
antenna).

5. Structures of Micro strip Antenna

6. UWB (Ultra Wide Band)
• It is a Radio technology that modulates impulse based waveforms instead
of continuous carrier waves.
Characteristics:
• Its frequency ranges from 3.1Ghz to 10Ghz. Very high bandwidth within
short range (200Mbps within 10m).
• Very high data rates possible
-500 Mbps can be achieved at distances of 10 feet under current regulations.
• Extremely low transmission energy ( less than 1mW).
• Frequency diversity with minimal hardware modifications.
• Geolocation/Positioning
– Sub-centimeter resolution using pulse leading edge detection
– passes through building blocks, walls, etc. (LOS not required)

7. Literary Survey
1. Modern wireless communication systems need antennas with further bandwidth and
smaller size. Fractals have unique properties such as self-similarity and space filling. The
concepts of fractals can be applied to the design of low-profile and multi-band antennas.
In this article, a super wideband antenna by applying a new fractal geometry to a wire
monopole antenna is presented. The modelling and simulation are performed using
SuperNEC electromagnetic simulator. The results show that the proposed antenna can be
used for frequency range 10–40 GHz, i.e. it is a super wideband antenna with 30 GHz
bandwidth. Radiation pattern and gain are also studied and show a good agreement over
the bandwidth.ref[1].
2. A microstrip-fed ultra wideband antenna with dual band rejection characteristics is
investigated. The anten-na has the same shape between radiation patch and ground plane,
and is fabricated on a Rogers RT/duroid 5880 substrate with an overall size of
22×31.85×0.508 mm3. To generate two notched frequency bands, a Unshaped parasitic
element on the back of the patch is utilized. The two notched bands can be controlled by
adjusting the size of the parasitic element. The measured results show that the proposed
antenna has an im-pedance bandwidth of 3.0 to 11.7 GHz for S11 <−10 dB, expects two
eliminated frequency bands 5.08~5.96 GHz for wireless local area network and
8.71~10.25 GHz for X-Bands.ref[2].

8. 1. This article presents the design of ultra wide band (UWB) square shape fractal antenna
with matching strip. The impedance matching of this proposed antenna is achieved using
the metal strip in ground plane at angle 60from the centre of the patch. The experimental
results of this antenna exhibit the ultra wide band characteristics from 2.355 GHz to 15.0
GHz corresponding to 145.722% impedance bandwidth This antenna can be useful for
transmission of high data rate wireless communications, medical imaging and other UWB
applications.ref[3].
2. A novel multi-band planar monopole antenna for various wireless communication
applications is presented. The base of the proposed antenna is an ellipse-shaped
patch that covers the ultra wideband (UWB) frequency range. To create extra
frequency bands below the UWB band, two narrow quarter-wavelength strips are
attached to the high concentrated current area of the patch. Two notched bands,
centred at 3.5 GHz WiMAX and 5.5 GHz WLAN, are also created by similarly
integrating strips to the radiation patch. The proposed multi-band antenna has a
small size of 30 × 30 mm2 and covers GSM (1.77–1.84 GHz), Bluetooth (2.385–2.49 GHz)
and UWB (3.1–10.6 GHz) bands. Simulated and measured results are presented and
compared, which show that the antenna has omnidirectional and stable radiation patterns
across the entire pass band. Furthermore, good group delay and transmission characteristics
can be achieved in the UWB band.ref[4].

9. OBJECTIVE:
Modeling , Simulation and Analysis
of UWB(Ultra Wide Band) For Micro
strip Patch Antenna

10. References
[1]. Abolfazl Azari (2012): A new ultra-wideband fractal monopole antenna,
International Journal of Electronics, 99:2, 295-303.
[2]. Lei Chang, Cheng Liao, Ling.lu Chen & Xuan Zheng (2012) Compact
Planar Ultra-wideband Antenna with Wireless Local Area Network and X
Band Notches, IETE Technical Review, 29:1, 76-79.
[3]. Raj Kumar & Ashish G. Kokate (2013) On the design of square shape
fractal antenna with matching strip for UWB applications, International
Journal of Electronics, 100:7,881-889.
[4]. Tong Li, Huiqing Zhai, Long Li & Changhong Liang (2014) Monopole
antenna for GSM, Bluetooth, and UWB applications with dual band-
notched characteristics, Journal of Electromagnetic Waves and
Applications, 28:14, 1777-1785.

11. ADVANTAGES
• Low profile and lightweight, t << 0.03𝜆0 and it is usually
made from perfectly electrically conducting (PEC).
• They permit both linear and circular polarization.
• Integration with other circuit is: It is simple to completely
integrate a micro strip patch antenna on a printed-circuit board
(PCB) with other planar circuit is.
• Easy to fabricate (use etching and photolithography).
• Versatility: a microstrip patch antenna is very versatile in terms
of impedance, resonant frequency, radiation pattern,
polarization and operating mode

12. DISADVANTAGE
• Sensitive to environment conditions like
temperature and humidity.
• Low gain and power handling capability.
• High Dielectric and conductor losses.
• High quality factor.
• Poor polarization efficiency.

13. APPLICATIONS
• Mobile communication.
• Satellite communication.
• Global positioning system.
• Direct broadcast satellite system.
• In medical field.