文档介绍：RF expertise
Antenna Integration
& Design Guidelines
RF Expertise
Antenna 3F optimization (form-fit-function)
Close cooperation & collaboration with the customer for:
SAR and shielding related issues
PCB editing and ground plane related issues
Impedance matching requirements
Integration – microphone, speaker, camera, FPCB, etc.
Diversity issues
Simulation
Rapid prototyping
Benchmarking
RF Expertise Choice of material
ηtrcd=ηηη Use Low loss Plastics and
high conductivity radiators
ηt= total efficiency
2
ηr==−Γ reflection efficiency (1 )
ηc= conduction efficiency Also effected by
ηd= dielectric efficiency Hand and Head
RF Expertise Hand held positions
The hand and head can reduce
the signal form 6 – 12 dB’s
depending on the phone
structure and how the phone is
held.
Careful consideration to
antenna location can help
reduce the performance loss.
RF Expertise The Ground Plane
The length of the phone Chassis has a considerable effect on the
performance of the antenna.
Chassis length vs Bandwidth for 900/1800MHz
25
20
)
15
900 MHz
1800 MHz
10
Bandwidth 6dB (%
5
0
0 20 40 60 80 100 120 140 160 180 200
Chassis length (mm)
RF Expertise Antenna Volume
The greater the Antenna volume the
better the Bandwidth and Efficiency.