US4169265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
P-Band loop antennas in radial array
Assignee: United States Department of the Army
•
Filing: 1978-05-04
•
Granted: 1979-09-25
•
Expires: 1998-05-04
Abstract
Abstract A P-band uniform loop antenna system simulating the small uniform in-phaseurrent loop by using a number of smaller radiating elements that are connected in phase so that each current in each element is in phase. Thus, a small uniform loop radiation pattern is simulated, but the loop elements are arranged on a radius that is not small compared to a wavelength, and are located around a cylinder.
Inventors
- 👤 James E. Howell, deceased
- 👤 Wayne T. Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:54
CPC Classifications
H; H01; H01Q; H01Q7/00; H01Q1/00; H01Q1/27; H01Q1/28; H01Q21/00; H01Q21/06; H01Q21/20; H01Q21/205
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
166 words
An antenna system comprising a plurality of radiating elements distributed spatially on a radius that is not small compared to given wavelength but connected in phase so as to simulate a radiation pattern similar to a single loop radiation element with radius very small compared to the wavelength and uniform in-phase current; a plurality of capacitor elements; each of said capacitor elements being individually connected to a different one of said plurality of radiating elements; said system has an operating frequency; said capacitor and radiating elements being resonantly tuned to each other; each radiating element has one side connected to one side of one of the plurality of capacitor elements and the other side of the radiating element being connected to a common path; the other side of said capacitor element being connected to said common path; a power divider having a plurality of outputs connected to a junction between the ends of each radiating element and having a return side connected to said common path.
Claim 2
Dependent Claim
166 words
An antenna system comprising a plurality of radiating elements distributed spatially on a radius that is not small compared to given wavelength but connected in phase so as to simulate a radiation pattern similar to a single loop radiation element with radius very small compared to the wavelength and uniform in-phase current; a plurality of capacitor elements; each of said capacitor elements being individually connected to a different one of said plurality of radiating elements; said system has an operating frequency; said capacitor and radiating elements being resonantly tuned to each other; each radiating element has one side connected to one side of one of the plurality of capacitor elements and the other side of the radiating element being connected to a common path; the other side of said capacitor element being connected to said common path; a power divider having a plurality of outputs connected to a junction between the ends of each radiating element and having a return side connected to said common path.
Claim 3
Dependent Claim
19 words
An antenna system as set forth in claim 1 wherein said common path is the skin of a missile.
Claim 4
Dependent Claim
28 words
An antenna system as set forth in claim 1 wherein the position of said junction can be varied and the value of said capacitor elements can be varied.
References Cited (Backward Citations)
US2166750A
Cited
US2293136A
Cited
US2431124A
Cited
US2618746A
Cited
GB936029A
Cited
US3151328A
Cited
US3681770A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |