Antenna switching circuit

Details Antenna switching circuit Antenna switching circuit

2007-07-03

2007-07-03

Nguyen, Lee (Department: 2618)

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

C455S552100, C333S101000

Reexamination Certificate

active

10714023

ABSTRACT:
A switching circuit for use at the antenna of a multiband mobile cellular handset comprises an antenna port10, a TX low band port14, a TX high band port12and at least one RX port16. A single pole, triple throw solid state voltage-controlled switch made up of four PIN diodes D1to D4selectively connects any one of the TX low band port, TX high band port and RX port to the antenna port. No diplexer is used to separate the low and high band parts o the circuit.

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