Dielectric resonator
First Claim
1. A method of providing temperature compensation for the resonant frequency of a dielectric resonator comprised of a first dielectric resonator member mounted on a substrate and having a second dielectric member affixed to the top of said first member, comprising the steps of:
- selecting the constituent material of said first dielectric resonator member to have a relatively high dielectric constant;
selecting the constituent material of said second dielectric member to have a relatively low dielectric constant, andselecting the thickness of said second dielectric member as a linear function of the temperature coefficient of frequency of said first member and a reciprocal function of both the temperature coefficient of thickness expansion of said second member and the thickness coefficient of frequency of said second member to provide a substantially zero temperature coefficient of resonant frequency of said resonator.
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Accused Products
Abstract
A method and means for producing a zero temperature coefficient for providing frequency stabilization as well as adjusting the frequency at a particular temperature of a dielectric resonator comprised of a cylindrical dielectric resonator element mounted on a substrate and having a dielectric disc affixed to the top of the resonator element. A zero temperature coefficient is obtained by selectively choosing the thickness of the dielectric disc depending upon the temperature coefficients of the constituent material of both the disc and resonator element. The operating frequency at a given temperature is furthermore adjusted by including two mutually contiguous patterns of metallization on the top surface of the resonator element and the bottom surface of the dielectric disc and thereafter rotating the disc so that a predetermined percentage of overlap between the two patterns exists.
43 Citations
14 Claims
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1. A method of providing temperature compensation for the resonant frequency of a dielectric resonator comprised of a first dielectric resonator member mounted on a substrate and having a second dielectric member affixed to the top of said first member, comprising the steps of:
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selecting the constituent material of said first dielectric resonator member to have a relatively high dielectric constant; selecting the constituent material of said second dielectric member to have a relatively low dielectric constant, and selecting the thickness of said second dielectric member as a linear function of the temperature coefficient of frequency of said first member and a reciprocal function of both the temperature coefficient of thickness expansion of said second member and the thickness coefficient of frequency of said second member to provide a substantially zero temperature coefficient of resonant frequency of said resonator. - View Dependent Claims (2, 3, 4, 5)
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6. A dielectric resonator for generating microwave and millimeter wave signals, comprising:
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a dielectric substrate having first and second opposing surfaces and including a ground plane formed on said first surface; a dielectric resonator mount having a relatively low dielectric constant located on said second surface; a dielectric resonator element having a relatively high dielectric constant located on said resonator mount and including a first pattern of metallization formed on the upper surface thereof; a dielectric top member having a relatively low dielectric constant located over said first pattern of metallization of said resonator element and including a second pattern of metallizatiion for interacting with said first pattern of metallization formed on one surface of said dielectric top member for adjusting the resonant frequency of said resonator. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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Specification