US 9,819,325 B2Granted

Time delay filters

AssigneeKumu Networks, Inc.

InventorsWilhelm Steffen Hahn, Alfred Riddle, Ernie Landi

Life of this patent

Estimating the term…

Loading patent…

Abstract

A time delay filter comprising a substrate comprising a first surface and a second surface opposite the first surface; 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 first conductive region, and a first inductive element coupled between the first coupling point and the first conductive region, and comprising a first and second inductor tap; and 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 first conductive region, and a second inductive element electrically coupled between the second coupling point and the first conductive region wherein the system group delays a signal output at a second coupling point relative to a signal input at the first coupling point.

Claims19

Dependent claims

A time delay filter comprising:

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;
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.

8 more elements

A time delay filter comprising:

a substrate comprising a first surface and a second surface opposite the first surface;
wherein the first surface comprises a first conductive 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 first conductive region, and
a first inductive element electrically coupled between the first coupling point and the first conductive region, and comprising:
a first and second inductor tap;
a second conductive region coupled to the second surface,
a first via that is electrically connected to and extends between the first and second conductive regions;
a second via that is electrically connected to and extends between the first conductive region and a first portion of the capacitive element;
wherein the first and second inductor taps are resistively coupled to the second via;
and
a third via that is electrically connected 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 define a loop;
a first switch that couples the first inductor tap to the first coupling point when in a first switch state and couples the second inductor tap to the first coupling point when in a second switch state;
wherein the inductive element has a first inductance when the first switch is in the first switch state and a second inductance when the first switch is in the second switch state;
and
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 first conductive region, and
a second inductive element electrically coupled between the second coupling point and the first conductive region;
wherein the system group delays a signal output at the second coupling point relative to a signal input at the first coupling point.

19 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/382,335Filed 16 Dec 2016 · us provisional application
Priority: 16 Dec 2015
Published: US 2017/0179916 A122 Jun 2017
Granted: 14 Nov 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H03H 7/32
Time-delay networks: with lumped inductance and capacitance
H03H 7/0115
Frequency selective two-port networks: comprising only inductors and capacitors
H03H 7/09
Frequency selective two-port networks: filters comprising mutual inductance
H03H 7/1708
Structural details of sub-circuits of frequency selective networks: comprising bridging elements, i.e. elements in a series path without own…