Temperature compensated dielectric filter
First Claim
1. A temperature compensated filter comprising a body of dielectric material having at least one transmission line resonator formed therein, and a capacitor coupled to said transmission line resonator for tuning said filter and having a temperature coefficient of frequency opposite that of the dielectric body.
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Accused Products
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.
52 Citations
10 Claims
- 1. A temperature compensated filter comprising a body of dielectric material having at least one transmission line resonator formed therein, and a capacitor coupled to said transmission line resonator for tuning said filter and having a temperature coefficient of frequency opposite that of the dielectric body.
Specification