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
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
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
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
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