Antenna duplexer

Details Antenna duplexer Antenna duplexer

2006-05-02

2006-05-02

Le, Dinh T. (Department: 2816)

Oscillators

Negative resistance or negative transconductance oscillator

Secondary emission

C310S31300R

Reexamination Certificate

active

07038551

ABSTRACT:
An antenna duplexer (14′) comprises a transmission (TX) filter (16) having an input and an output. The TX filter input is arranged to connect to a TX port of a mobile telecommunications handset and the TX filter output is arranged to connect to an antenna (12) for the mobile telecommunications handset. The duplexer further includes a Dual Mode Surface Acoustic Wave (SAW) type receiver (RX) filter (18′) having an input and a balanced output. The RX filter input is arranged to connect to the antenna (12) and the RX filter output is arranged to connect directly to a balanced input RX port of the mobile telecommunications handset.

REFERENCES:
patent: 5515015 (1996-05-01), Nakata
patent: 5835990 (1998-11-01), Saw et al.
patent: 6313715 (2001-11-01), Bergmann et al.
patent: 6346864 (2002-02-01), Kadota
patent: 6373350 (2002-04-01), Fujita
patent: 6380823 (2002-04-01), Ikata et al.
patent: 6489860 (2002-12-01), Ohashi
patent: 6714099 (2004-03-01), Hikita et al.
patent: 2001/0043024 (2001-11-01), Takamine et al.

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