Integrated down converter and interdigital filter apparatus and

Details Integrated down converter and interdigital filter apparatus and Integrated down converter and interdigital filter apparatus and

1988-10-24

1991-05-28

LaRoche, Eugene R.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455347, 174 521, 174 523, 361394, 361395, 361399, 333203, H04B 118, H04B 108, H01P 1205, H05K 714

Patent

active

050201492

ABSTRACT:
An integrated down converter and interdigital filter apparatus having a down converter and a number of interdigital filters mounted on the same printed circuit board and installed in the watertight housing. The housing of each interdigital filter is cut from sheet metal, with a conductive surface on the printed circuit board as one side. A method for construction of the interdigital filter is also set forth.

REFERENCES:
patent: 3593223 (1971-07-01), King et al.
patent: 4019141 (1977-04-01), Numan et al.
patent: 4112398 (1978-09-01), Burnett et al.
patent: 4152671 (1979-05-01), Tuma et al.
patent: 4384367 (1983-05-01), King et al.
patent: 4569000 (1986-02-01), Noji
patent: 4772862 (1988-09-01), Kubo et al.
patent: 4791717 (1988-12-01), Hemmie
patent: 4831498 (1989-05-01), Baba

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