This presentation gives an insight about various antennas that were in use in cell phones and are being used in today's smartphones. Images of various phone models showing antenna used are included to give pictorial view of internal antennas

1. NAVEEN KUMAR
●Teacher ●Researcher ● Technophile
Cell Phone Antennas

2. Contents
Cell Phone Antennas
2
 The Icebreaker: First Cell Phone
 Facts about the first cell phone
 Trends in Cell-Phone Development
 Antenna – An Introduction
 Types of Antennas used in Cell phones
 Retractable Monopole Antenna
 Helical Antenna
 Intenna
 Planar Inverted-F Antenna (PIFA)
● Antennas in some of Today’s Smartphones
● SAR Measurement
● Advancements & Future Technologies
● References

3. The Icebreaker: First Cell-Phone
3
Dr. Martin Cooper at Motorola Inc.
Thin phone: 7.2 [mm]
Motorola ULTRA
Cell Phone Antennas
DynaTAC

4. 4
The first
DynaTAC
phone
weighted
around 2.2
Kgs (approx.)
The battery
life would
last for
only 20
minutes
Nicknamed
the
‘The BRICK’
Its cost
was
around
4,000 US
Dollars
Cell Phone Antennas
Quick Facts About the First Cell Phone

5. Trends in Cell-Phone Development
5
Cell Phone Antennas

6. Antenna- An Introduction
6
 An Antenna converts electromagnetic radiation into electric
current, or vice versa.
 Need of Antenna :
 For transmission and reception of the radio signal.
 Antennas are required by any radio receiver or transmitter to
couple its electrical connection to the electromagnetic field.
Cell Phone Antennas

7. Types of Antennas used in Cell Phones
7
Following are some of the antennas used in cellular phones:
 External Antennas
 Retractable Monopole (whips) antennas
 Helical antennas
 Internal Antennas
 Microstrip antennas (MSA)
 Planar inverted-F antennas (PIFA)
Cell Phone Antennas

8. Retractable Monopole Antenna
8
 An antenna that we can retract.
 Basically a dipole antenna with top loading (looks like
a hat)
Cell Phone Antennas

9. Helical (Stubby) Antenna
9
 When we open a cap, we can see a helical antenna.
(looks like a spring)
 We don’t have to retract. → It is convenient for users.
Cell Phone Antennas

10. Ceramic Helical Antenna
10
 High permittivity → Small antenna size
Cell Phone Antennas

11. Intenna
11
 Internal antenna: The antenna is embedded inside the
phone which is not visible to us.
 A phone case is strongly related to an intenna.
Cell Phone Antennas

12. Intenna for 3G Phone
12
 A metal strip pattern is served as an antenna.
Cell Phone Antennas

13. Planar Inverted F Antenna (PIFA)
13
RadiatorSignal Input
Coaxial
Cable
Original Form
PIFA
Integrated PIFA
Cell Phone Antennas

14. Triple-Band Antenna
14
 Intenna: internal antenna
 Resonance: 900, 1800, 1900 [MHz]
Cell Phone Antennas

15. PIFA for Cell-Phone
15
Cell Phone Antennas
Resonance Graph

16. PIFA for Notebook
16
Cell Phone Antennas

17. Antennas for Galaxy Nexus & Galaxy S
17
Cell Phone Antennas
Galaxy Nexus
Galaxy S

18. Apple’s Antennagate
18
 Death grip: when we touch a certain part of an iPhone 4, the
ongoing call may gets dropped.
 Stainless steel frame as multi-band antennas.
Iphone 4
Cell Phone Antennas

19. SAR Measurement
19
 SAR: Specific Absorption Rate
 Our brain can absorb Electromagnetic (EM) power. The
SAR measures how much power our head absorbs.
Cell Phone Antennas

20. Advancements & Future Technologies
Cell Phone Antennas
20

21. References
Cell Phone Antennas
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1) Kin-Lu Wong, “Planar Antennas for Wireless Communication”, Published by John
Wiley & Sons, Inc., Chapter: 2, Pages: 26-65, 2003.
2) C. Rowell, E.Y. Lam, “Mobile-phone antenna design”, IEEE Antennas and Propagation
Magazine, Vol. 54, No. 4, Page(s): 14 – 34, 2012.
3) Images from shutterstock.com, antenna-theory.com, istockphoto.com, empire.de,
antenova.com, nearfield.org, gsmarena.com.

22. Cell Phone Antennas 22
Any Questions/Queries...

23. Where to find me..
23
chd.naveen@gmail.com
/chd.naveen
@saini_naveen87
/NaveenKumar11
www.elixir-india.com

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