US 6,347,237 B1Granted

High temperature superconductor tunable filter

AssigneeSuperconductor Technologies, Inc.

InventorsRichard C. Eden, Balam A. Willemsen, George L. Matthaei

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Abstract

A tunable filter having a fixed substrate, a first and second plate comprising a high-temperature superconductor material on the fixed substrate, a movable substrate, a mechanical driver attached to the fixed substrate and the movable substrate, a floating plate comprising a high-temperature superconductor material on the fixed substrate wherein the floating plate, the first plate, and the second plate define a gap, and wherein the gap is varied by length changes in the mechanical driver is provided.

Claims15

Dependent claims

A tunable filter comprising:

a fixed substrate;
a first plate on said fixed substrate, said first plate comprising a high-temperature superconductor material, said first plate defining a first plane;
a second plate on said fixed substrate, said second plate comprising a high-temperature superconductor material, said second plate disposed in the first plane defined by said first plate;
an inductor comprising a high-temperature superconductor material, said inductor being disposed substantially in said first plane, said inductor coupled to said first and second plates;
a movable substrate;
a floating plate on said movable substrate;
said floating plate disposed in a second plane spaced apart and substantially parallel to said first plane, said floating plate having a first and second end, said first end of said floating plate overlapping said first plate, said second end of said floating plate overlapping said second plate, said first, second and floating plates being disposed between said movable and said fixed substrates wherein said first, second and floating plates define a capacitor gap, wherein said movable substrate extends substantially past both said first and second ends of said floating plate thereby providing a first and second extension, respectively;
a first driver having a first end and a second end, said first end of said driver mounted on said fixed substrate, said second end of said driver attached to a first coupling member;
and
a second driver having a first end and a second end, said first end of said second driver mounted on said movable substrate at said first extension, said second end of said second driver attached to said first coupling member, said second driver being disposed substantially parallel to said first driver, wherein a length decrease of said first driver and a length increase of said second driver decreases said capacitor gap, affecting a frequency response of said tunable filter;
a third driver having a first end and a second end, said first end of said third driver mounted on said second extension, said second end of said third driver attached to a second coupling member;
and
a fourth driver having a first end and a second end, said first end of said fourth driver mounted on said fixed substrate, said second end of said fourth driver attached to said second coupling member, said fourth driver being disposed substantially parallel to said third driver, wherein a length decrease of said fourth driver and a length increase of said third driver decreases said capacitor gap, affecting said frequency response of said tunable filter.

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Dependencies are inferred from the claim text.

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Abstract

A tunable filter comprising:

a fixed substrate;
a first plate on said fixed substrate, said first plate comprising a high-temperature superconductor material, said first plate defining a first plane;
a second plate on said fixed substrate, said second plate comprising a high-temperature superconductor material, said second plate disposed in the first plane defined by said first plate;
an inductor comprising a high-temperature superconductor material, said inductor being disposed substantially in said first plane, said inductor coupled to said first and second plates;
a movable substrate;
a floating plate on said movable substrate;
said floating plate disposed in a second plane spaced apart and substantially parallel to said first plane, said floating plate having a first and second end, said first end of said floating plate overlapping said first plate, said second end of said floating plate overlapping said second plate, said first, second and floating plates being disposed between said movable and said fixed substrates wherein said first, second and floating plates define a capacitor gap, wherein said movable substrate extends substantially past both said first and second ends of said floating plate thereby providing a first and second extension, respectively;
a first driver having a first end and a second end, said first end of said driver mounted on said fixed substrate, said second end of said driver attached to a first coupling member;
and
a second driver having a first end and a second end, said first end of said second driver mounted on said movable substrate at said first extension, said second end of said second driver attached to said first coupling member, said second driver being disposed substantially parallel to said first driver, wherein a length decrease of said first driver and a length increase of said second driver decreases said capacitor gap, affecting a frequency response of said tunable filter;
a third driver having a first end and a second end, said first end of said third driver mounted on said second extension, said second end of said third driver attached to a second coupling member;
and
a fourth driver having a first end and a second end, said first end of said fourth driver mounted on said fixed substrate, said second end of said fourth driver attached to said second coupling member, said fourth driver being disposed substantially parallel to said third driver, wherein a length decrease of said fourth driver and a length increase of said third driver decreases said capacitor gap, affecting said frequency response of said tunable filter.

10 more elements