Global Patent Index - EP 0035922 B1

EP 0035922 B1 19840620 - TUNING DEVICE WITH VARIABLE CAPACITY AND TUNABLE MICROWAVE FILTER WITH AT LEAST ONE SUCH DEVICE

Title (en)

TUNING DEVICE WITH VARIABLE CAPACITY AND TUNABLE MICROWAVE FILTER WITH AT LEAST ONE SUCH DEVICE

Publication

EP 0035922 B1 19840620 (FR)

Application

EP 81400240 A 19810217

Priority

FR 8004833 A 19800304

Abstract (en)

[origin: US4380747A] The invention relates to ultra-high frequency filters with variable capacitance tuning devices tunable in a wide frequency range. Each tuning device comprises two coaxial fingers, namely a fixed finger and a finger movable in the filter body. One of these fingers is hollow and the other has a tuning plunger, whose end is cylindrical and which is displaceable, e.g. by screwing in the body of the finger. The minimum capacitance obtained with a minimum penetration of the plunger, its end being level in the vicinity of the end of the corresponding finger, is adjustable by displacing the movable finger relative to the fixed finger. The supplementary variable capacitance is obtained by plunging the tuning plunger into the hollow finger.

IPC 1-7

H01P 1/205; H01P 1/219; H01P 7/04

IPC 8 full level

H01P 1/205 (2006.01); H01P 1/219 (2006.01); H01P 7/04 (2006.01)

CPC (source: EP US)

H01P 1/205 (2013.01 - EP US); H01P 1/219 (2013.01 - EP US); H01P 7/04 (2013.01 - EP US)

Citation (examination)

Designated contracting state (EPC)

DE GB IT

DOCDB simple family (publication)

EP 0035922 A1 19810916; EP 0035922 B1 19840620; DE 3164252 D1 19840726; FR 2477783 A1 19810911; FR 2477783 B1 19840921; JP S56136001 A 19811023; JP S6151442 B2 19861108; US 4380747 A 19830419

DOCDB simple family (application)

EP 81400240 A 19810217; DE 3164252 T 19810217; FR 8004833 A 19800304; JP 3040781 A 19810303; US 23799781 A 19810225