0/90 degree coupler with complex termination

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United States of America Patent

PATENT NO 9806394
APP PUB NO 20160344086A1
SERIAL NO

14862489

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The isolated port of a 0/90 degree coupler is terminated by a novel complex termination impedance circuit having a reactance. The absolute value of the reactance is at least two ohms. The coupler receives a signal on its input port, and outputs a first signal on its first output port and a second signal on its second output port. A first load is coupled to the first output port without an intervening matching network. A substantial impedance mismatch exists between the first output port and the first load. A second load is coupled to the second output port without an intervening matching network. A substantial impedance mismatch exists between the second output port and the second load. Despite the substantial impedance mismatches, the first and second signals have a phase difference in a range of from 88 degrees to 92 degrees while exhibiting an amplitude imbalance less than 2 dB.

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Patent Owner(s)

  • MEDIATEK INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chee, Yuen Hui San Jose, US 9 51
Golcuk, Fatih San Jose, US 1 4
Shana'a, Osama K A Los Altos, US 13 84

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