Patent US5942958A successfully refreshed from Google Patents.
US5942958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Symmetrical piezoelectric resonator filter
Assignee: Qorvo US Inc
•
Filing: 1998-07-27
•
Granted: 1999-08-24
•
Expires: 2018-07-27
Abstract
Abstract A microwave filter made of piezoelectric resonators fabricated in a monolithic device. Combinations of resonators connected in series and and parallel to each other are laid out in a symmetrical compact arrangement providing symmetrical and similar paths connecting the resonators together and to the ground. The symmetrical layout thus avoids differences in the connector inductances that otherwise would degrade filter performance.
Inventors
- 👤 Kenneth Meade Lakin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:09
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/54; H03H9/58; H03H9/60; H03H9/605
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
128 words
A piezoelectric resonator filter of the type having a plurality of piezoelectric resonators comprising, a ground conductor, a plurality of shunt piezoelectric resonators, each shunt piezoelectric resonator having two electrodes and one of which electrodes is connected to the ground conductor, a plurality of series piezoelectric resonators, each series piezoelectric resonator having two electrodes, neither of which electrodes is connected directly to the ground conductor, the plurality of series piezoelectric resonators including at least one set of four series piezoelectric resonators consisting of one pair of series piezoelectric resonators connected in serial with each other and a second pair of series piezoelectric resonators connected in serial with each other, the first pair of series piezoelectric resonators being connected in parallel with the second pair of series piezoelectric resonators.
Claim 2
Dependent Claim
128 words
A piezoelectric resonator filter of the type having a plurality of piezoelectric resonators comprising, a ground conductor, a plurality of shunt piezoelectric resonators, each shunt piezoelectric resonator having two electrodes and one of which electrodes is connected to the ground conductor, a plurality of series piezoelectric resonators, each series piezoelectric resonator having two electrodes, neither of which electrodes is connected directly to the ground conductor, the plurality of series piezoelectric resonators including at least one set of four series piezoelectric resonators consisting of one pair of series piezoelectric resonators connected in serial with each other and a second pair of series piezoelectric resonators connected in serial with each other, the first pair of series piezoelectric resonators being connected in parallel with the second pair of series piezoelectric resonators.
Claim 3
Dependent Claim
55 words
The device of claim 1 having a centerline and the plurality of series piezoelectric resonators being located substantially symmetrically about the center line and the plurality of shunt piezoelectric resonators being located substantially symmetrically about the center line and the plurality of series piezoelectric resonators being electrically interconnected with the plurality of shunt piezoelectric resonators.
Claim 4
Dependent Claim
9 words
The device of claim 2 being a monolithic device.
Claim 5
Dependent Claim
9 words
The device of claim 1 being a monolithic device.
Claim 6
Dependent Claim
92 words
A piezoelectric resonator filter of the type having a plurality of piezoelectric resonators comprising, a ground conductor, a plurality of shunt piezoelectric resonators, each shunt piezoelectric resonator having two electrodes and one of which electrodes is connected to the ground conductor, a plurality of series piezoelectric resonators, each series piezoelectric resonator having two electrodes, neither of which electrodes is connected directly to the ground conductor, the plurality of series piezoelectric resonators including at least one set of at least four series piezoelectric resonators interconnected to each other in serial and parallel combinations.
Claim 7
Dependent Claim
92 words
A piezoelectric resonator filter of the type having a plurality of piezoelectric resonators comprising, a ground conductor, a plurality of shunt piezoelectric resonators, each shunt piezoelectric resonator having two electrodes and one of which electrodes is connected to the ground conductor, a plurality of series piezoelectric resonators, each series piezoelectric resonator having two electrodes, neither of which electrodes is connected directly to the ground conductor, the plurality of series piezoelectric resonators including at least one set of at least four series piezoelectric resonators interconnected to each other in serial and parallel combinations.
Claim 8
Dependent Claim
55 words
The device of claim 5 having a centerline and the plurality of series piezoelectric resonators being located substantially symmetrically about the center line and the plurality of shunt piezoelectric resonators being located substantially symmetrically about the center line and the plurality of series piezoelectric resonators being electrically interconnected with the plurality of shunt piezoelectric resonators.
Claim 9
Dependent Claim
9 words
The device of claim 6 being a monolithic device.
Claim 10
Dependent Claim
9 words
The device of claim 5 being a monolithic device.
Claim 11
Dependent Claim
116 words
A piezoelectric resonator filter of the type having a plurality of piezoelectric resonators comprising, a ground conductor, a plurality of shunt piezoelectric resonators, each shunt piezoelectric resonator having two electrodes and one of which electrodes is connected to the ground conductor, a plurality of series piezoelectric resonators, each series piezoelectric resonator having two electrodes, neither of which electrodes is connected directly to the ground conductor, the plurality of series piezoelectric resonators including at least one set of at least four series piezoelectric resonators interconnected to each other in serial and parallel combinations, the plurality of shunt piezoelectric resonators including at least one set of at least two shunt piezoelectric resonators connected to each other in parallel.
Claim 12
Dependent Claim
116 words
A piezoelectric resonator filter of the type having a plurality of piezoelectric resonators comprising, a ground conductor, a plurality of shunt piezoelectric resonators, each shunt piezoelectric resonator having two electrodes and one of which electrodes is connected to the ground conductor, a plurality of series piezoelectric resonators, each series piezoelectric resonator having two electrodes, neither of which electrodes is connected directly to the ground conductor, the plurality of series piezoelectric resonators including at least one set of at least four series piezoelectric resonators interconnected to each other in serial and parallel combinations, the plurality of shunt piezoelectric resonators including at least one set of at least two shunt piezoelectric resonators connected to each other in parallel.
Claim 13
Dependent Claim
9 words
The device of claim 9 being a monolithic device.
Claim 14
Dependent Claim
55 words
The device of claim 9 having a centerline and the plurality of series piezoelectric resonators being located substantially symmetrically about the center line and the plurality of shunt piezoelectric resonators being located substantially symmetrically about the center line and the plurality of series piezoelectric resonators being electrically interconnected with the plurality of shunt piezoelectric resonators.
Claim 15
Dependent Claim
9 words
The device of claim 11 being a monolithic device.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-08-23 | 2003-02-22 | 2003-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-23 | 2007-02-22 | 2007-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-23 | 2011-02-22 | 2011-08-24 | $7700.00 | Window Closed / Lapsed |