US5021795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passive temperature compensation scheme for microstrip antennas
Assignee: Motorola Solutions Inc
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Filing: 1989-06-23
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Granted: 1991-06-04
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Expires: 2009-06-23
Abstract
Abstract A temperature dependent capacitor formed from bi-metallic strips is used to compensate for changes in the resonant frequency of a microstrip patch antenna array structure due to dielectric constant thermal effects.
Inventors
- 👤 Joseph Masiulis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:56
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/0407; H01Q9/0442
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
67 words
For a microstrip patch antenna on a substrate of dielectric material, a method for compensating antenna resonant frequency for changes due to substrate dielectric constant thermal effects, the method comprising: disposing passive, temperature dependent capacitors about one or more radiating edges of the microstrip patch antenna: wherein the passive, temperature dependent capacitors comprise bi-metallic strips that move with respect to one another in response to temperature change.
Claim 2
Dependent Claim
67 words
For a microstrip patch antenna on a substrate of dielectric material, a method for compensating antenna resonant frequency for changes due to substrate dielectric constant thermal effects, the method comprising: disposing passive, temperature dependent capacitors about one or more radiating edges of the microstrip patch antenna: wherein the passive, temperature dependent capacitors comprise bi-metallic strips that move with respect to one another in response to temperature change.
Claim 3
Dependent Claim
96 words
For a microstrip patch antenna on a substrate of dielectric material having one or more radiating elements of predetermined electrical size and predetermined resonant frequency, a method for compensating the resonant frequency for changes due to dielectric constant thermal effects, the method comprising: disposing temperature dependent bi-metallic plate capacitors about one or more radiating edges of the microstrip patch antenna so that changes in capacitive loading resulting from changes in temperature will result in corresponding changes in electric size of the radiating elements, thus substantially offsetting changes in resonant frequency resulting from dielectric constant thermal effects.
Claim 4
Dependent Claim
96 words
For a microstrip patch antenna on a substrate of dielectric material having one or more radiating elements of predetermined electrical size and predetermined resonant frequency, a method for compensating the resonant frequency for changes due to dielectric constant thermal effects, the method comprising: disposing temperature dependent bi-metallic plate capacitors about one or more radiating edges of the microstrip patch antenna so that changes in capacitive loading resulting from changes in temperature will result in corresponding changes in electric size of the radiating elements, thus substantially offsetting changes in resonant frequency resulting from dielectric constant thermal effects.
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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) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-03 | 1998-12-03 | 1999-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-03 | 2002-12-03 | 2003-06-04 | $7700.00 | Window Closed / Lapsed |