Multiple antenna impedance optimization

Details Multiple antenna impedance optimization Multiple antenna impedance optimization

2005-07-19

2005-07-19

Appiah, Charles (Department: 2686)

Telecommunications

Transmitter

Including tuning

C455S107000, C455S123000, C343S913000

Reexamination Certificate

active

06920315

ABSTRACT:
A multiple antenna mobile communication device, such as a cellular telephone, having multiple radios and multiple antennas located in close proximity to each other uses a parallel tuning circuit to optimize the isolation between the antennas. The parallel tuning circuit can include multiple impedance matching circuits to match the impedance in multiple frequency bands or isolating antennas.

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