Antenna switching circuit

Details Antenna switching circuit Antenna switching circuit

2006-07-11

2006-07-11

Takaoka, Dean (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S124000, C333S132000

Reexamination Certificate

active

07075386

ABSTRACT:
This invention relates to a switching circuit for use at the antenna of a multi-band cellular handset to select between the TX and RX modes of the bands. A number of high isolation switching circuits for selectively connecting a common antenna port to a TX port2or an RX port3of a multi-band cellular handset are described.

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European Search Report.

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