Radio frequency switching apparatus and mobile...

Details Radio frequency switching apparatus and mobile... Radio frequency switching apparatus and mobile...

2006-04-11

2006-04-11

Le, Lana (Department: 2685)

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

C455S080000, C455S079000, C455S083000, C333S110000

Reexamination Certificate

active

07027778

ABSTRACT:
A radio frequency switching apparatus wherein a filter for a transmitter module passes a transmission frequency to an antenna in a transmission mode and isolates the antenna and the transmitter module from each other in a reception mode. The radio frequency switching apparatus comprises a filter connected between the transmitter module and the antenna for passing a transmitted signal from the transmitter module to the antenna in the transmission mode. The filter also acts to cut off a reception frequency in the reception mode. The switching apparatus further comprises a first switching device for isolating the transmitter module and the antenna from each other in the reception mode, and a second switching device for isolating the antenna and a receiver module from each other in the transmission mode. No separate ¼ wavelength strip line is required, making the circuitry of the switching apparatus simpler and, thus, the size thereof smaller.

REFERENCES:
patent: 4970479 (1990-11-01), Landt et al.
patent: 4973940 (1990-11-01), Sakai et al.
patent: 5355524 (1994-10-01), Higgins, Jr.
patent: 5434455 (1995-07-01), Kammeter
patent: 5497417 (1996-03-01), Brahms et al.
patent: 5625894 (1997-04-01), Jou
patent: 2002/0177421 (2002-11-01), Muhammad et al.
patent: 2004/0185818 (2004-09-01), Ha et al.
patent: 07-079173 (1995-03-01), None
patent: 2004-140597 (2004-05-01), None
patent: 2004-172729 (2004-06-01), None
Japanese Abstract, Patent No. JP7079173, Published Mar. 20, 1995.

Affiliated with

Also associated with

Rating

Radio frequency switching apparatus and mobile... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Radio frequency switching apparatus and mobile..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio frequency switching apparatus and mobile... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3575615