US5361050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced split ring resonator
Assignee: Motorola Solutions Inc
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Filing: 1993-07-06
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Granted: 1994-11-01
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Expires: 2013-07-06
Abstract
Abstract A bandpass filter (40) includes a first microstrip split-ring resonator (12), having at least a first edge and a second edge, the first edge having a gap (20), and an input The bandpass filter (40) also includes a second microstrip split-ring resonator (14), having at least a first edge and a second edge, the first edge being coupled to the second edge of the first microstrip split-ring resonator electromagnetically (22) and by a central grounding aperture (223), and the second edge of the second microstrip split-ring resonator comprising a gap (26) and a balanced output (30, 32).
Inventors
- 👤 Stephen B. Einbinder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:00
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/203; H01P1/20327; H01P1/20354; H01P1/20381
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
186 words
A balanced output filter, comprising: a first port; a first transmission-line split-ring resonator, having at least a first edge and a second edge, the first edge having a gap therein, and the first edge being coupled to the first port; a second transmission-line split-ring resonator, having at least a first edge and a second edge, the first edge being coupled to the second edge of the first split-ring resonator, and the second edge of the second split-ring resonator comprising a gap therein; a second port coupled to the second edge of the second split-ring resonator, the second port having a balanced output, the second port comprising a first terminal located at one side of the gap in the second edge of the second split-ring resonator, and a second terminal symmetrically located at the other side of the gap in the second edge of the second split-ring resonator; and grounding means, electrically coupling the center of the first edge of the second split-ring resonator and the center of the second edge of the first split-ring resonator to ground, for improving the balanced output of the second port.
Claim 2
Dependent Claim
186 words
A balanced output filter, comprising: a first port; a first transmission-line split-ring resonator, having at least a first edge and a second edge, the first edge having a gap therein, and the first edge being coupled to the first port; a second transmission-line split-ring resonator, having at least a first edge and a second edge, the first edge being coupled to the second edge of the first split-ring resonator, and the second edge of the second split-ring resonator comprising a gap therein; a second port coupled to the second edge of the second split-ring resonator, the second port having a balanced output, the second port comprising a first terminal located at one side of the gap in the second edge of the second split-ring resonator, and a second terminal symmetrically located at the other side of the gap in the second edge of the second split-ring resonator; and grounding means, electrically coupling the center of the first edge of the second split-ring resonator and the center of the second edge of the first split-ring resonator to ground, for improving the balanced output of the second port.
Claim 3
Dependent Claim
38 words
The filter of claim 1, wherein the grounding means comprises the center of the first edge of the second split-ring resonator and the center of the second edge of the first split-ring resonator sharing a common ground connection.
Claim 4
Dependent Claim
48 words
The filter of claim 1, wherein the grounding means comprises the first edge of the second transmission-line split-ring resonator having a first aperture near the center of the first edge and the second edge of the first transmission-line split-ring resonator having a second aperture near the first aperture.
Claim 5
Dependent Claim
57 words
The filter of claim 1, wherein the grounding means comprises the first edge of the second split-ring resonator having a first through-hole to an underlying ground plane, near the center of the first edge, and the second edge of the first transmission-line split-ring resonator having a second through-hole to the underlying ground plane, near the first through-hole.
Claim 6
Dependent Claim
214 words
A balanced output filter and mixer combination, comprising: a first port; a first microstrip split-ring resonator, having at least a first edge and a second edge, the first edge having a gap therein, and the first edge being coupled to the first port; a second transmission-line split-ring resonator, having at least a first edge and a second edge, the first edge being coupled to the second edge of the first microstrip split-ring resonator, and the second edge of the second transmission-line split-ring resonator comprising a gap therein; a second port having a balanced output, the second port being coupled to the second edge of the second transmission-line split-ring resonator, the second port comprising a first terminal located at one side of the gap in the second edge of the second transmission-line split-ring resonator, and a second terminal symmetrically located at the other side of the gap in the second edge of the second transmission-line split-ring resonator; grounding means, electrically coupling the center of the first edge of the second transmission-line split-ring resonator and the center of the second edge of the first microstrip split-ring resonator to ground, for improving the balanced output of the second port; and a balanced four diode bridge mixer having a balanced input coupled to the first and second terminals.
Claim 7
Dependent Claim
214 words
A balanced output filter and mixer combination, comprising: a first port; a first microstrip split-ring resonator, having at least a first edge and a second edge, the first edge having a gap therein, and the first edge being coupled to the first port; a second transmission-line split-ring resonator, having at least a first edge and a second edge, the first edge being coupled to the second edge of the first microstrip split-ring resonator, and the second edge of the second transmission-line split-ring resonator comprising a gap therein; a second port having a balanced output, the second port being coupled to the second edge of the second transmission-line split-ring resonator, the second port comprising a first terminal located at one side of the gap in the second edge of the second transmission-line split-ring resonator, and a second terminal symmetrically located at the other side of the gap in the second edge of the second transmission-line split-ring resonator; grounding means, electrically coupling the center of the first edge of the second transmission-line split-ring resonator and the center of the second edge of the first microstrip split-ring resonator to ground, for improving the balanced output of the second port; and a balanced four diode bridge mixer having a balanced input coupled to the first and second terminals.
Claim 8
Dependent Claim
38 words
The filter and mixer combination of claim 5, wherein the grounding means comprises the first edge of the second transmission-line split-ring resonator and the second edge of the first microstrip split-ring resonator having a common central ground aperture.
Claim 9
Dependent Claim
212 words
A communication device comprising: receiver means for receiving radio-frequency signals; a bandpass filter having a balanced output, coupled to the receiver means, comprising: a first port; a first transmission-line split-ring resonator, having at least a first edge and a second edge, the first edge having a gap therein, and the first edge being coupled to the first port; a second microstrip split-ring resonator, having at least a first edge and a second edge, the first edge being coupled to the second edge of the first transmission-line split-ring resonator, and the second edge of the second microstrip split-ring resonator comprising a gap therein; a second port having a balanced output, the second port being coupled to the second edge of the second microstrip split-ring resonator, the second port comprising a first terminal located at one side of the gap in the second edge of the second microstrip split-ring resonator, and a second terminal symmetrically located at the other side of the gap in the second edge of the second microstrip split-ring resonator; and grounding means, electrically coupling the center of the first edge of the second microstrip split-ring resonator and the center of the second edge of the first transmission-line split-ring resonator to ground, for improving the balanced output of the second port.
Claim 10
Dependent Claim
212 words
A communication device comprising: receiver means for receiving radio-frequency signals; a bandpass filter having a balanced output, coupled to the receiver means, comprising: a first port; a first transmission-line split-ring resonator, having at least a first edge and a second edge, the first edge having a gap therein, and the first edge being coupled to the first port; a second microstrip split-ring resonator, having at least a first edge and a second edge, the first edge being coupled to the second edge of the first transmission-line split-ring resonator, and the second edge of the second microstrip split-ring resonator comprising a gap therein; a second port having a balanced output, the second port being coupled to the second edge of the second microstrip split-ring resonator, the second port comprising a first terminal located at one side of the gap in the second edge of the second microstrip split-ring resonator, and a second terminal symmetrically located at the other side of the gap in the second edge of the second microstrip split-ring resonator; and grounding means, electrically coupling the center of the first edge of the second microstrip split-ring resonator and the center of the second edge of the first transmission-line split-ring resonator to ground, for improving the balanced output of the second port.
Claim 11
Dependent Claim
27 words
The communication device of claim 7 further comprising a balanced four diode bridge mixer having a balanced input coupled to the balanced output of the bandpass filter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-31 | 1998-05-02 | 1998-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-31 | 2002-05-02 | 2002-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-31 | 2006-05-02 | 2006-11-01 | $7700.00 | Window Closed / Lapsed |