Helical resonator filter with adjustable couplings

Details Helical resonator filter with adjustable couplings Helical resonator filter with adjustable couplings

1991-02-05

1992-10-20

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333212, H01P 120

Patent

active

051573636

ABSTRACT:
A high-frequency filter employing helix resonators and a metallic or metallized cover. The cover contains at least two helix-shaped resonator coils separated from each other by a metallic or metallized partition provided with an aperture which there is a tuning strip, by reducing the size of which the size of the aperture can be enlarged and thereby the electrical coupling between the resonators adjusted.

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patent: 3836881 (1974-09-01), Koizumi
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patent: 4251787 (1981-02-01), Young et al.
patent: 4490699 (1984-12-01), Yanagida
patent: 4682131 (1987-07-01), May
patent: 4701728 (1987-10-01), Igarashi
Improved Design of a Helical Resonator Filter for 450-500 MHZ Band Land Mobile Communication by Banmail Rawat, 5 pages, 8105 IEEE Transactions on Vehicular Technology, VT--33 (1984) Feb., No. 1, N.Y. USA.
Japanese Abstracts, vol. 9, No. 143 (E-322) (1866) Jun. 18, 1985, Entitled Waveguide Form Polarized Filter by Fujitsu K.K.
Microwave Transmissions Circuits, by George L. Ragan, First Edition, Copyright 1948 by McGraw-Hill Book Co.
European Search Report dated Jun. 4, 1991, PDG/16032, 91300929.6--LK-Products OY.

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