Temperature compensated dielectric filter

Details Temperature compensated dielectric filter Temperature compensated dielectric filter

1992-06-25

1994-04-12

Nelli, Raymond A.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333206, H01P 120

Patent

active

053029240

ABSTRACT:
A temperature compensated filter comprises a block (1) of dielectric material having at least one transmission line resonator (3) formed herein. All surfaces except one side surface of the block are substantially coated with an electrically conductive layer (11). For achieving temperature compensation, a capacitor (6) coupled to the conductive layer (11) through a strip line (7) is attached, in a heat conductive way, to the uncoated side surface of the dielectric block. The capacitor (6) tunes the main resonator and the temperature dependence of its frequency is opposite that of the dielectric body so that it compensates the temperature dependence of the frequency of the main resonator.

REFERENCES:
patent: 4464640 (1984-08-01), Nishikawa et al.
patent: 4559506 (1985-12-01), Capek
patent: 4965537 (1990-10-01), Kommrusch
patent: 5010309 (1991-04-01), Manssen et al.
patent: 5015974 (1991-05-01), Komazaki et al.
patent: 5103197 (1992-04-01), Turunen et al.
patent: 5202653 (1993-04-01), Yamada et al.
patent: 5202654 (1993-04-01), Heine

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