Telecommunications – Transmitter and receiver at same station – With transmitter-receiver switching or interaction prevention
Patent
1978-05-30
1980-10-21
Bookbinder, Marc E.
Telecommunications
Transmitter and receiver at same station
With transmitter-receiver switching or interaction prevention
343861, 370 32, 455129, 455289, 455340, H04B 144
Patent
active
042298261
ABSTRACT:
A wide band impedance matching device is described for matching the impedance of an antenna transmission line to a radio transceiver over a wide band of radio frequencies. The device includes an impedance matching network having an inductor and two capacitors that electrically interconnect in either a capacitance "T" mode or a capacitance ".pi." mode. The device also includes an efficient bypass circuit that is capable of electrically bypassing the impedance matching network to effectively directly interconnect the antenna transmission line to the transceiver.
REFERENCES:
patent: 2112320 (1938-03-01), Wilhelm
patent: 2186068 (1940-01-01), Hammond et al.
patent: 2650298 (1953-08-01), Thias et al.
patent: 2738471 (1956-03-01), Cassutt
patent: 3162809 (1964-12-01), Yax
patent: 3166368 (1965-01-01), Higgins et al.
patent: 3188590 (1965-08-01), Early
patent: 3193785 (1965-07-01), Mann et al.
patent: 3464015 (1969-08-01), Brabham
patent: 3825864 (1974-07-01), Ramstrom
patent: 4085366 (1978-04-01), Padgett
patent: 4112377 (1978-09-01), Tanner et al.
ARRL, "Radio Amateur's Handbook," 41'st Edition, 1964, pp. 355-358.
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