Patent USH1230H successfully refreshed from Google Patents.
USH1230H
Expired / Lapsed
US
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Microstrip frequency-scan antenna
Assignee: United States Department of the Army
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Filing: 1992-02-07
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Granted: 1993-09-07
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Expires: 2012-02-07
Abstract
Abstract An antenna comprises a microstrip transmission line which includes a strip conductor and a ground plane conductor separated by a dielectric substrate; a portion of the substrate being adapted to enable energy within the substrate to radiate away from the microstrip transmission line. To permit frequency-scanning, the substrate has an antenna portion formed therein which is adapted to permit RF energy supplied to the microstrip transmission line to be directionally radiated away from the microstrip transmission line at the antenna portion, the direction of radiation being a function of the frequency of the supplied energy. The substrate may have greater capacitance at said antenna portion than at other portions of said substrate.
Inventors
- 👤 Richard A. Stern
- 👤 Richard W. Babbitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:24
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/20; H01Q13/206; H01Q3/00; H01Q3/22
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
39 words
An antenna, comprising: a microstrip transmission line which includes a strip conductor and a ground plane conductor separated by a dielectric substrate; the substrate having means enabling energy within said substrate to radiate away from said microstrip transmission line.
Claim 2
Dependent Claim
39 words
An antenna, comprising: a microstrip transmission line which includes a strip conductor and a ground plane conductor separated by a dielectric substrate; the substrate having means enabling energy within said substrate to radiate away from said microstrip transmission line.
Claim 3
Dependent Claim
70 words
A frequency-scan antenna, comprising: a microstrip transmission line which includes a strip conductor and a ground plane conductor separated by a dielectric substrate; the substrate having an antenna portion formed therein having means permitting RF energy supplied to said microstrip transmission line to be directionally radiated away from said microstrip transmission line at said antenna portion, the direction of radiation being a function of the frequency of said supplied energy.
Claim 4
Dependent Claim
70 words
A frequency-scan antenna, comprising: a microstrip transmission line which includes a strip conductor and a ground plane conductor separated by a dielectric substrate; the substrate having an antenna portion formed therein having means permitting RF energy supplied to said microstrip transmission line to be directionally radiated away from said microstrip transmission line at said antenna portion, the direction of radiation being a function of the frequency of said supplied energy.
Claim 5
Dependent Claim
39 words
An antenna as in claim 2, wherein said antenna portion is defined by a platform between said strip conductor and said ground plane conductor at said antenna portion which is substantially thicker than at other portions of said substrate.
Claim 6
Dependent Claim
24 words
An antenna as in claim 3, wherein said means comprises lateral slots formed in said platform permitting lateral radiation therefrom of said supplied energy.
Claim 7
Dependent Claim
31 words
An antenna as in claim 4, wherein said slots are spaced with substantially equal spacing, thereby permitting the radiated energy to be scanned by changing the frequency of the supplied energy.
Claim 8
Dependent Claim
29 words
An antenna as in claim 5, wherein said spacing is selected as a function of the frequency of the supplied energy and of the dielectric constant of the platform.
Claim 9
Dependent Claim
24 words
An antenna as in claim 2, wherein said substrate has greater capacitance at said antenna portion than at said other portions of said substrate.
Claim 10
Dependent Claim
23 words
An antenna as in claim 2, wherein the substrate has a higher dielectric constant at said antenna portion than at said other portions.
Claim 11
Dependent Claim
23 words
An antenna as in claim 8, wherein the dielectric constant at said antenna portion is substantially 6 times that at said other portions.
Claim 12
Dependent Claim
26 words
An antenna as in claim 9, wherein the dielectric constant at said antenna portion is substantially 12 and that at said other portions is substantially 2.
Claim 13
Dependent Claim
39 words
An antenna as in claim 8, wherein said antenna portion is defined by a platform between said strip conductor and said ground plane conductor at said antenna portion which is substantially thicker than at other portions of said substrate.
Claim 14
Dependent Claim
24 words
An antenna as in claim 11, wherein said means comprises lateral slots formed in said platform permitting lateral radiation therefrom of said supplied energy.
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) | 1996-09-06 | 1997-03-08 | 1997-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-06 | 2001-03-08 | 2001-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-06 | 2005-03-08 | 2005-09-07 | $7700.00 | Window Closed / Lapsed |