L-C type filter module and helical filter made up of at...

Details L-C type filter module and helical filter made up of at... L-C type filter module and helical filter made up of at...

2005-11-29

2005-11-29

Pascal, Robert (Department: 2817)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S219000, C333S207000, C333S226000

Reexamination Certificate

active

06970058

ABSTRACT:
An L-C type filter module comprising at least two capacitors and at least one inductor. Each of the capacitors consists of a first elongated element made of conductive material partially fitted in a hole made in a second element made of conductive material, connected electrically to the second elements of the other capacitor(s) or possibly common to the various capacitors, at least the internal lateral surfaces defining the holes being covered with dielectric material, as are the edges of the openings of the holes or perforations and at least parts, or preferably all, of the external surfaces of the second element(s) adjoining the edges, and the coil of each inductor is carried by a support body made of dielectric material, possibly contiguous with the second element(s) or the dielectric coating at least partially covering the external face of each second element.

REFERENCES:
patent: 2753530 (1956-07-01), Horvath
patent: 2913681 (1959-11-01), Lyman
patent: 3621484 (1971-11-01), Shult
patent: 3733608 (1973-05-01), McGhay et al.
patent: 3836881 (1974-09-01), Koizumi
patent: 4182997 (1980-01-01), Brambilla
patent: 4374370 (1983-02-01), Popovski et al.
patent: 4385279 (1983-05-01), Meador
patent: 6407651 (2002-06-01), Wulff et al.
patent: 2003/0137300 (2003-07-01), Gonella et al.
patent: 1439858 (1966-04-01), None

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