Patent US4633262A successfully refreshed from Google Patents.
US4633262A
Expired / Lapsed
US
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Microstrip antenna with protective casing
Assignee: Rogers Corp
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Filing: 1982-09-27
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Granted: 1986-12-30
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Expires: 2002-09-27
Abstract
Abstract A microstrip antenna is presented in which the circuit pattern is on the inner side of a glass plate and is spaced from the ground plane by an air dielectric. The outer side of the glass plate serves as a protective cover for the circuit pattern and the ground plane.
Inventors
- 👤 G. Robert Traut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:34
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/40; H01Q13/00; H01Q13/20; H01Q13/206; H01Q21/00; H01Q21/06; H01Q21/061; H01Q21/065
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
A microstrip antenna including: a first glass plate; first conductive means on one surface of said first plate defining a ground plane for a microstrip antenna; a second glass plate spaced from said first glass plate, said space between said glass plates being hermetically sealed; second conductive means on one surface of said second plate defining a microstrip antenna circuit pattern, said pattern comprising a plurality of transmission lines and radiating elements; said first and second conductive means being on interior facing surfaces of the first and second plates; and spacer means for maintaining said first and second plates in spaced apart relation and defining a space between said plates.
Claim 2
Dependent Claim
110 words
A microstrip antenna including: a first glass plate; first conductive means on one surface of said first plate defining a ground plane for a microstrip antenna; a second glass plate spaced from said first glass plate, said space between said glass plates being hermetically sealed; second conductive means on one surface of said second plate defining a microstrip antenna circuit pattern, said pattern comprising a plurality of transmission lines and radiating elements; said first and second conductive means being on interior facing surfaces of the first and second plates; and spacer means for maintaining said first and second plates in spaced apart relation and defining a space between said plates.
Claim 3
Dependent Claim
29 words
A microstrip antenna as in claim 1 wherein: said second plate has a dielectric constant of not more than 8 and a loss tangent of not more than 0.01.
Claim 4
Dependent Claim
33 words
A microstrip antenna as in claim 1 wherein: said second plate has a thickness of between approximately 0.1 inches to one half the wavelength of a microwave signal being received by the antenna.
Claim 5
Dependent Claim
25 words
A microstrip antenna as in claim 1 wherein: the coefficients of thermal expansion of said first and second plate and said spacer means are matched.
Claim 6
Dependent Claim
15 words
A microwave antenna as in claim 1 wherein: said space between said plates contains air.
Claim 7
Dependent Claim
17 words
A microwave antenna as in claim 1 wherein: said space between said plates contains an inert gas.
Claim 8
Dependent Claim
15 words
A microwave antenna as in claim 1 wherein: said space between said plates is evacuated.
References Cited (Backward Citations)
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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) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |