US4101895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multifrequency antenna system integrated into a radome
Assignee: United States Department of the Army
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Filing: 1977-02-14
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Granted: 1978-07-18
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Expires: 1997-02-14
Abstract
Abstract An antenna system that comprises two or more linear arrays within close pimity which can be integrated into a conical dielectric radome. The elements of each array are wedge shaped open-ended cavity radiators plated on the outside of the radome structure. The bottom edge of each element is shorted to an inside conducting surface. Each array is designed to be operated in a different frequency band. A simple coaxial line feeds each of the radiators.
Inventors
- 👤 Howard S. Jones, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:28
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/0407; H01Q9/0421; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/281; H01Q1/40; H01Q1/405; H01Q5/00; H01Q5/40; H01Q5/42
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
125 words
A multifrequency antenna system for integration into dielectric structures comprising: A body whose structure is composed of a dielectric material; Conductive plating on the inside surface of the body; A plurality of conductive patches on the outside of the body forming one antenna array; A second plurality of conductive patches on the outside of the body forming a second antenna array, wherein the first and second plurality of patches are wedge shaped and are each linearly aligned; A means for shorting the bottom edge of the first and second plurality of conductive patches to the inside conductively plated surface; and Coupling means for energizing the arrays whereby an efficient multifrequency antenna is constructed with a minimum of cross polarized components and coupling between the arrays.
Claim 2
Dependent Claim
125 words
A multifrequency antenna system for integration into dielectric structures comprising: A body whose structure is composed of a dielectric material; Conductive plating on the inside surface of the body; A plurality of conductive patches on the outside of the body forming one antenna array; A second plurality of conductive patches on the outside of the body forming a second antenna array, wherein the first and second plurality of patches are wedge shaped and are each linearly aligned; A means for shorting the bottom edge of the first and second plurality of conductive patches to the inside conductively plated surface; and Coupling means for energizing the arrays whereby an efficient multifrequency antenna is constructed with a minimum of cross polarized components and coupling between the arrays.
Claim 3
Dependent Claim
17 words
The multifrequency antenna system, as set forth in claim 1, wherein the shorting means comprise conductive posts.
Claim 4
Dependent Claim
25 words
The multifrequency antenna system, as set forth in claim 1, wherein the first and second plurality of patches appear in each quadrant of a radome.
Claim 5
Dependent Claim
28 words
The multifrequency antenna system, as set forth in claim 1, wherein the first and second plurality of patches are staggered and offset to enhance decoupling between the arrays.
Claim 6
Dependent Claim
29 words
The multifrequency antenna system, as set forth in claim 1, wherein the wedge shaped patches have a height of λ/4 where λ(wavelength) is determined by the selected operating frequency.
Claim 7
Dependent Claim
40 words
The multifrequency antenna system, as set forth in claim 5, wherein the coupling means is a coaxial cable with the inner conductor of the cable extending through the dielectric and bonded to the wedge shaped patches near the shorted edge.
Claim 8
Dependent Claim
23 words
The multifrequency antenna system, as set forth in claim 6, wherein the dielectric material has plated through holes acting as the shorting means.
Claim 9
Dependent Claim
27 words
The multifrequency antenna system, as set forth in claim 5, wherein the bottom, shorted edge of the antenna is longer than the upper edge of the antenna.
Claim 10
Dependent Claim
29 words
The multifrequency antenna, as set forth in claim 5, wherein the first and second plurality of wedge shaped patches are of different heights and therefore have different operating frequencies.
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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |