Signal transmission reception switching apparatus

Telecommunications – Transmitter and receiver at same station – With transmitter-receiver switching or interaction prevention

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Details

455 81, 455 82, 455 83, H04B 146

Patent

active

051932180

ABSTRACT:
A signal switching apparatus for switching between a 1/4 wavelength transmission line, which transmits a transmission signal, and a 1/4 wavelength reception line, which receives a reception signal, which share a common antenna. The apparatus sets the characteristic impedance of one of the 1/4 wavelength lines to be zero while the other 1/4 wavelength lines is set to infinity so that the switching operation can be effected without passing the transmission and reception signals through semiconductor switches.

REFERENCES:
patent: 3327215 (1967-06-01), Battin et al.
patent: 3339140 (1967-08-01), Pace
patent: 4399557 (1983-08-01), Muszkiewicz
patent: 5023935 (1991-06-01), Vancraeynest
patent: 5060293 (1991-10-01), Kok et al.

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