Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1977-08-22
1980-01-29
Gensler, Paul L.
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333207, 333223, 333234, H01P 704, H01P 706, H01P 120
Patent
active
041863593
ABSTRACT:
An electrical filter network with improved characteristics is disclosed for selectively attenuating and passing two different, closely spaced frequencies. The notch filter network includes a low Q reactive circuit tuned to be parallel resonant at the frequency to be attenuated. A cavity resonator with a high Q is inductively coupled to the reactive circuit and is tuned to be resonant at the frequency to be passed. Utilizing these concepts, a multicoupler may be constructed to consist of two or more such filter networks in combination with a transmission line. In such a multicoupler, the network adjacent to the antenna terminal is separated therefrom by a multiple of a half wavelength. Additional filter networks are separated from one another by an odd number of a quarter wavelength. With this arrangement, each network passes a band around the frequency to which the high Q cavity is tuned and rejects a band of frequencies around the reactive circuit resonant frequency.
REFERENCES:
patent: 3624563 (1971-11-01), Burley et al.
patent: 3733567 (1973-05-01), Johnson
patent: 3733608 (1973-05-01), McGhay et al.
patent: 3815137 (1974-06-01), Kaegebein
patent: 3876963 (1975-04-01), Graham
patent: 4037177 (1977-07-01), Tyrey
patent: 4075583 (1978-02-01), Kershaw
patent: 4080601 (1978-03-01), Alcorn, Jr.
Gensler Paul L.
Nussbaum Marvin
Tx Rx Systems Inc.
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