Method and device for adjacent channels operation

Details Method and device for adjacent channels operation Method and device for adjacent channels operation

2005-05-13

2009-06-02

Le, Nhan T (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S209000, C343S893000

Reexamination Certificate

active

07542752

ABSTRACT:
A method and device for adjacent channels operation based on downconverting the input signal to an IF signal, filtering the IF signal, and upconverting the filtered IF signal to the original frequency. The present invention is primarily directed to applications involving the use of standard RF transceiver which does not incorporate a high Q filter. Moreover, the present invention may be used with a circular polarized cross recessed corners stacked array antenna in order to further improve its adjacent channels operation performance.

REFERENCES:
patent: 4866451 (1989-09-01), Chen
patent: 4943809 (1990-07-01), Zaghloul
patent: 4972346 (1990-11-01), Kawano et al.
patent: 6326923 (2001-12-01), Shigihara
patent: 7139545 (2006-11-01), Drentea
patent: 2001/0021229 (2001-09-01), Belaiche
patent: 2004/0080455 (2004-04-01), Lee
patent: 2004/0189532 (2004-09-01), Nakano
patent: 2006/0139232 (2006-06-01), Martin
patent: WO9908337 (1997-07-01), None

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