Radio equipment directional coupler

Details Radio equipment directional coupler Radio equipment directional coupler

1991-09-03

1993-05-18

Gensler, Paul

Telecommunications

Transmitter

With feedback of modulated output signal

333116, 333204, 455 80, H04B 104, H01P 518

Patent

active

052128156

ABSTRACT:
A directional coupler (103) for radio equipment couples a radio frequency signal from an input of a microstrip transmission line (309) to an output and provides a directionally coupled output via a stripline microstrip (311). Open circuit microstrip transmission line stubs (313 and 315) are tuned to a quarter wavelength of the third harmonic of the radio frequency to provide third harmonic rejection within the directional coupler.

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S. Cohn, "Characteristic Impedances of Broadside-Coupled Strip Transmission Lines", IRE Transactions on Microwave Theory & Techniques, Nov. 1960 pp. 633-637.
J. Sheldton, Jr., "Impedances of Offset Parallel-Coupled Strip Transmission Lines", IEEE Transactions on Microwave Theory and Techniques, Jan. 1966, pp. 7-15.

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