Band-pass filter

Details Band-pass filter Band-pass filter

1990-08-07

1991-11-19

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333219, H01P 1203

Patent

active

050669338

ABSTRACT:
A band-pass filter for the microwave band consists of a dielectric substrate, a grounded conductor layer formed on the back surface of the substrate, input and output transmission line conductors formed on the front surface of the substrate, and a plurality of .lambda./2-length microstrip conductors formed between the input and output transmission line conductors such that they align in parallel over about .lambda./4 length. A through hole is formed through each .lambda./2-length microstrip conductor, the substrate and the grounded conductor layer at the center of the microstrip conductor. The .lambda./2-length microstrip conductor and the grounded conductor layer are electrically connected to each other through a conductive layer formed on the substrate wall of the through hole.

REFERENCES:
patent: 4264881 (1981-04-01), De Ronde
patent: 4313097 (1982-01-01), de Ronde
patent: 4352076 (1982-09-01), Saitoh et al.
patent: 4578656 (1986-03-01), Lacour et al.
patent: 4641116 (1987-02-01), Shibata et al.

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