Dual adjacent directional filters/combiners

Details Dual adjacent directional filters/combiners Dual adjacent directional filters/combiners

1985-10-03

1987-11-10

LaRoche, Eugene R.

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333204, 333126, 333134, H01P 1213, H01P 518

Patent

active

047060492

ABSTRACT:
A dual adjacent directional filter is disclosed for the splitting and combining of signals. This device is composed of a six port filter wherein if the appropriate signal is entered into the center port two signals having the same frequency as the input signal and equally divided amplitudes will output to the corresponding two output ports. This device is comprised of two transmission lines being equally divided by an impedance matching transmission line. Between the impedance matching transmission line and the regular transmission lines is located a filtering device of either a loop type transmission line; resonator; or transmission stubs.

REFERENCES:
patent: 2922123 (1960-01-01), Cohn
patent: 3092790 (1963-06-01), Leake et al.
patent: 3447102 (1969-05-01), Gerwartowski
patent: 3560887 (1971-02-01), Napoli et al.
patent: 3678415 (1972-07-01), Kuroda
patent: 4061990 (1977-12-01), Ueno
patent: 4264881 (1981-04-01), De Ronde
patent: 4287605 (1981-09-01), Dydyk
patent: 4457022 (1984-06-01), Dydyk
Cohn, S. B. and Coale, F. S.; "Directional Channel-Separation Filters"; Proceedings of the IRE; Aug. 1956 issue; pp. 1018-1024.
Kamazawa et al; "A 30 Ghz Band Periodic Filter with a Ring Resonator"; Electronics and Communications in Japan; vol. 59-B, No. 1; Jan. 1976; pp. 78-86.

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