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US 10,050,597 B2Granted
Time delay filters
AssigneeKumu Networks, Inc.
InventorsWilhelm Steffen Hahn, Alfred Riddle, Ernie Landi
Life of this patent
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Abstract
A time delay filter comprising a substrate; four coupled LC resonators, each having a coupling point; a first capacitor that electrically couples the first coupling point to the second coupling point; a second capacitor that electrically couples the second coupling point to the third coupling point; and a third capacitor that electrically couples the third coupling point to the fourth coupling point; the filter group delaying a signal output at the fourth coupling point relative to a signal input at the first coupling point.
Claims14
A time delay filter comprising:
- a substrate comprising a conductive ground region;
- a first LC resonator coupled to the substrate and comprising:
- a first coupling point,
- a first capacitive element electrically coupled between the first coupling point and the ground region, and
- a first inductive element electrically coupled between the first coupling point and the ground region;
- a second LC resonator coupled to the substrate and comprising:
- a second coupling point,
- a second capacitive element electrically coupled between the second coupling point and the ground region, and
- a second inductive element electrically coupled between the second coupling point and the ground region;
- a third LC resonator coupled to the substrate and comprising:
- a third coupling point,
- a third capacitive element electrically coupled between the third coupling point and the ground region, and
- a third inductive element electrically coupled between the third coupling point and the ground region;
- a fourth LC resonator coupled to the substrate and comprising:
- a fourth coupling point,
- a fourth capacitive element electrically coupled between the fourth coupling point and the ground region, and
- a fourth inductive element electrically coupled between the fourth coupling point and the ground region;
- a first capacitor that electrically couples the first coupling point to the second coupling point;
- a second capacitor that electrically couples the second coupling point to the third coupling point;
- and
- a third capacitor that electrically couples the third coupling point to the fourth coupling point;
- wherein the filter group delays a signal output at the fourth coupling point relative to a signal input at the first coupling point;
- wherein the substrate comprises a first surface, a second surface substantially parallel to the first surface, and a volume between the first and second surfaces;
- wherein the first, second, third, and fourth capacitive elements are buried capacitors within the substrate volume;
- wherein the first, second, and third capacitors are surface capacitors on the first surface of the substrate;
- wherein first and second sides of the first capacitive element are separated by a dielectric layer of the substrate, wherein the dielectric layer comprises hafnium oxide.
23 more elements
A time delay filter comprising:
- a substrate comprising a conductive ground region;
- a first LC resonator coupled to the substrate and comprising:
- a first coupling point,
- a first capacitive element electrically coupled between the first coupling point and the ground region, and
- a first inductive element electrically coupled between the first coupling point and the ground region;
- a second LC resonator coupled to the substrate and comprising:
- a second coupling point,
- a second capacitive element electrically coupled between the second coupling point and the ground region, and
- a second inductive element electrically coupled between the second coupling point and the ground region;
- a third LC resonator coupled to the substrate and comprising:
- a third coupling point,
- a third capacitive element electrically coupled between the third coupling point and the ground region, and
- a third inductive element electrically coupled between the third coupling point and the ground region;
- a fourth LC resonator coupled to the substrate and comprising:
- a fourth coupling point,
- a fourth capacitive element electrically coupled between the fourth coupling point and the ground region, and
- a fourth inductive element electrically coupled between the fourth coupling point and the ground region;
- a fifth LC resonator coupled to the substrate and comprising:
- a fifth coupling point,
- a fifth capacitive element electrically coupled between the fifth coupling point and the ground region, and
- a fifth inductive element electrically coupled between the fifth coupling point and the ground region;
- a sixth LC resonator coupled to the substrate and comprising:
- a sixth coupling point,
- a sixth capacitive element electrically coupled between the sixth coupling point and the ground region, and
- a sixth inductive element electrically coupled between the sixth coupling point and the ground region
- a first capacitor that electrically couples the first coupling point to the second coupling point;
- a second capacitor that electrically couples the second coupling point to the third coupling point;
- and
- a third capacitor that electrically couples the third coupling point to the fourth coupling point;
- a fourth capacitor that electrically couples the fourth coupling point to the fifth coupling point;
- and
- a fifth capacitor that electrically couples the fifth coupling point to the sixth coupling point;
- wherein the filter group delays a signal output at the sixth coupling point relative to a signal input at the first coupling point;
- wherein the first, second, third, fourth, fifth, and sixth LC resonators are arranged on the substrate in a horseshoe pattern;
- wherein the substrate comprises a first surface, a second surface substantially parallel to the first surface, and a volume between the first and second surfaces;
- wherein the first, second, third, fourth, fifth, and sixth capacitive elements are buried capacitors within the substrate volume;
- wherein the first, second, third, fourth, and fifth capacitors are surface capacitors on the first surface of the substrate;
- wherein first and second sides of the first capacitive element are separated by a dielectric layer of the substrate, wherein the dielectric layer comprises hafnium oxide.
35 more elements
Dependencies are inferred from the claim text.