Leakage power reduction apparatus

Details Leakage power reduction apparatus Leakage power reduction apparatus

2008-05-02

2011-12-27

Vo, Nguyen (Department: 2618)

Telecommunications

Transmitter

Noise or interference elimination

C455S083000

Reexamination Certificate

active

08086191

ABSTRACT:
A circulator extracts a transmission signal sent from a transmitter to antenna via the circulator and a duplexer, reflected by an antenna, and returned via the duplexer to the transmitter side. The amplitude and phase of the extracted signal are adjusted by an amplitude-and-phase adjuster to generate an offset signal having the same amplitude and the opposite phase with respect to a leaking transmission signal included in a signal output from a third terminal of the duplexer when combined by a combiner. The offset signal is combined in the combiner with the leaking transmission signal included in the signal output from the third terminal of the duplexer to suppress the leaking transmission signal.

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Office Action issued Dec. 28, 2010, in China Patent Application No. 200810088764.5 (with English translation).
The First Office Action issued on Aug. 23, 2011 for corresponding JP Patent Application No. 2007-122490, with English translation.

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