HIGH QUALITY FACTOR TIME DELAY FILTERS USING MULTI-LAYER FRINGE CAPACITORS
First Claim
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1. A multilayer fringe capacitor comprising:
- first and second interdigitated capacitor electrodes, both parallel to and intersecting a first planar surface;
wherein the first electrode defines a first region within the first planar surface and the second electrode defines a second region within the first planar surface;
third and fourth interdigitated capacitor electrodes, both parallel to and intersecting a second planar surface, the second planar surface parallel to and separated by a non-zero distance from the first planar surface;
wherein the third electrode defines a third region within the second planar surface and the fourth electrode defines a fourth region within the second planar surface;
a first set of coupling vias that electrically couples the first electrode to the third electrode; and
a second set of coupling vias that electrically couples the second electrode to the fourth electrode;
wherein, upon superimposing the first planar surface upon the second planar surface, the sum of the intersection of the first and fourth regions and the intersection of the second and third regions is greater than fifty percent of the union of the first, second, third, and fourth regions.
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Abstract
A multilayer fringe capacitor includes first and second interdigitated capacitor electrodes, both parallel to and intersecting a first planar surface; third and fourth interdigitated capacitor electrodes, the first and second electrodes parallel to and separated by a non-zero distance from the third and fourth electrodes; a first set of coupling vias that electrically couples the first electrode to the third electrode; and a second set of coupling vias that electrically couples the second electrode to the fourth electrode.
14 Citations
19 Claims
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1. A multilayer fringe capacitor comprising:
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first and second interdigitated capacitor electrodes, both parallel to and intersecting a first planar surface;
wherein the first electrode defines a first region within the first planar surface and the second electrode defines a second region within the first planar surface;third and fourth interdigitated capacitor electrodes, both parallel to and intersecting a second planar surface, the second planar surface parallel to and separated by a non-zero distance from the first planar surface;
wherein the third electrode defines a third region within the second planar surface and the fourth electrode defines a fourth region within the second planar surface;a first set of coupling vias that electrically couples the first electrode to the third electrode; and a second set of coupling vias that electrically couples the second electrode to the fourth electrode; wherein, upon superimposing the first planar surface upon the second planar surface, the sum of the intersection of the first and fourth regions and the intersection of the second and third regions is greater than fifty percent of the union of the first, second, third, and fourth regions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A multilayer fringe capacitor comprising:
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first, second, and third capacitor electrodes, all parallel to and intersecting a first planar surface;
wherein the first electrode defines a first region within the first planar surface, the second electrode defines a second region within the first planar surface, and the third electrode defines a third region within the first planar surface;
wherein the first electrode is interdigitated with both of the second and third capacitor electrodes;fourth, fifth, and sixth capacitor electrodes, all parallel to and intersecting a second planar surface, the second planar surface parallel to and separated a non-zero distance from the first planar surface;
wherein the fourth electrode defines a fourth region within the second planar surface, the fifth electrode defines a fifth region within the second planar surface, and the sixth electrode defines a sixth region within the second planar surface;
wherein the fourth electrode is interdigitated with both of the fifth and sixth capacitor electrodes;a first set of coupling vias that electrically couples the first electrode to the fourth electrode;
a second set of coupling vias that electrically couples the second electrode to the fifth electrode; anda third set of coupling vias that electrically couples the third electrode to the sixth electrode. - View Dependent Claims (17, 18)
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19. A time delay filter comprising:
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a substrate comprising a first isolative layer, the first isolative layer comprising a first surface and a second surface, the second surface substantially parallel to the first surface; a resonator, comprising a capacitive element coupled to an inductive element, the inductive element comprising; a first conductive region coupled to the first surface of the first isolative layer, a second conductive region coupled to the second surface of the first isolative layer, a first via that is electrically coupled to and extends between the first and second conductive region; a second via that is electrically coupled to and extends between the first conductive region and a first portion of the capacitive element; and a third via that is electrically coupled to and extends between the second conductive region and a second portion of the capacitive element;
wherein the first conductive region, the first via, the second conductive region, the second via, the capacitive element, and the third via form a loop;a first coupling point, electrically coupled to the first conductive region of the resonator; and a second coupling point, electrically coupled to the second conductive region of the resonator;
wherein the capacitive element comprises;first and second interdigitated capacitor electrodes, both parallel to and intersecting a third surface;
wherein the first electrode defines a first capacitor region within the third surface and the second electrode defines a second capacitor region within the third surface;third and fourth interdigitated capacitor electrodes, both parallel to and intersecting a fourth surface, the fourth surface parallel to and separated by a non-zero distance from the third surface;
wherein the third electrode defines a third capacitor region within the fourth surface and the fourth electrode defines a fourth capacitor region within the fourth surface;a first set of capacitor coupling vias that electrically couples the first electrode to the third electrode; and a second set of capacitor coupling vias that electrically couples the second electrode to the fourth electrode; wherein, upon superimposing the third surface upon the fourth surface, the sum of the intersection of the first and fourth capacitor regions and the intersection of the second and third capacitor regions is greater than fifty percent of the union of the first, second, third, and fourth capacitor regions.
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Specification