Transmitter filter with integral directional coupler for cellula

Details Transmitter filter with integral directional coupler for cellula Transmitter filter with integral directional coupler for cellula

1991-05-03

1993-07-20

Eisenzopf, Reinhard J.

Telecommunications

Transmitter

With feedback of modulated output signal

455 83, 455116, 333202, H04B 104, H01P 120

Patent

active

052300935

ABSTRACT:
A cellular telephone transmitter (100) includes a variable-gain power amplifier (102), the output of which is filtered and sampled by a filter (104) with an integral directional coupler. Filter (104) includes both a transmitter signal filter and a directional coupler on a ceramic block of one or more pieces. The directional coupler has been realized by two coupled transmission lines provided by the two holes (206 and 207) on the left side of the ceramic block, and the transmitter filter has been realized by five short-circuited coupled transmission lines provided by the five holes (201-205) on the right side of the ceramic block.

REFERENCES:
patent: 4431977 (1984-02-01), Sokola et al.
patent: 4768003 (1988-08-01), Kawakami et al.
patent: 4870698 (1989-09-01), Katsuyama et al.
patent: 4879533 (1989-11-01), de Muro et al.
patent: 5010309 (1991-04-01), Manssen et al.
patent: 5020093 (1991-05-01), Pireh
patent: 5045824 (1991-09-01), Metroka
patent: 5109536 (1992-04-01), Kommrusch

Affiliated with

Also associated with

Rating

Transmitter filter with integral directional coupler for cellula does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Transmitter filter with integral directional coupler for cellula, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmitter filter with integral directional coupler for cellula will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1767748