Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
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
Jantunen Heli
Turunen Aimo
LK-Products OY
Nelli Raymond A.
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