Arrangement for connecting selected antennas to a radio for tran

Details Arrangement for connecting selected antennas to a radio for tran Arrangement for connecting selected antennas to a radio for tran

1980-11-10

1982-11-30

Gensler, Paul L.

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

333125, 333 11, 370 38, 455277, H04B 138

Patent

active

043619053

ABSTRACT:
A single terminal for a radio transmitter and receiver is connected to a first antenna for transmitting, and simultaneously to the first antenna or a second antenna for receiving. The connection is provided by a three port circulator having a first port connected to the first antenna, a second port connected through a quarter wavelength transmission line to a PIN diode and the second antenna, and a third port connected to the radio terminal. The radio transmitter is normally connected to the first antenna through the circulator, and the first or the second antenna is selectively and simultaneously connected to the radio receiver depending upon the conductive condition of the PIN diode.

REFERENCES:
patent: 2189549 (1940-02-01), Hershberger
patent: 2818501 (1957-12-01), Stavis
patent: 3004153 (1961-10-01), Alford
patent: 3037113 (1962-05-01), Bier
patent: 3037114 (1962-05-01), Bier et al.
patent: 3276019 (1966-09-01), Fackler
patent: 3452299 (1969-06-01), Angel

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