Directional coupler for communication system

Details Directional coupler for communication system Directional coupler for communication system

2008-04-08

2008-04-08

Le, Lana (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Distortion, noise, or other interference prevention,...

C455S039000, C455S114100, C455S114200, C455S278100, C455S296000, C324S095000

Reexamination Certificate

active

07356309

ABSTRACT:
An improved directional coupler that significantly reduces the signal degradation problems associated with distortion caused by circuit elements used to measure the transmitted power. In a selected embodiment, the directional coupler of the present invention comprises a plurality of active elements, such as capacitors, that have values selected to ensure that the distortion created by circuit elements used to measure forward transmitted power. In an embodiment of the invention, capacitors have values selected to minimize in-band distortion signals at the fundamental carrier frequency of the transmitted signal and also at the second and third harmonics of the fundamental carrier frequency.

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