US3596271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave antenna having an undulating conductor with variable pitch and amplitude
Assignee: EMI Ltd
•
Filing: 1969-05-06
•
Granted: 1971-07-27
•
Expires: 1989-05-06
Abstract
Abstract The antenna array disclosed comprises an undulatory conductor which is capable of transmission and reception of energy, in which the amplitude and pitch of the undulations are progressively altered along the array to produce an array having directional characteristics, and a main lobe to side lobe ratio, which are those of a Dolph-Tchebycheff array. The undulations are circularly arcuate and blended into one another and the conductor is etched from one copper layer of a strip of low loss copper clad laminate, the other layer of which forms a ground plane.
Inventors
- 👤 Michael Frank Cosslett
- 👤 Robert Frost
- 👤 Kenneth Owen Rossiter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:51
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/20; H01Q13/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
178 words
A microwave antenna array comprising a conductor adapted to be capable of transmission or reception of energy, said conductor being constructed to undulate about an axis so as to form a series of transmitting or receiving elements disposed on alternate sides of said axis, the amplitude and distance from axis point to axis point of said elements being progressively altered along said antenna array, wherein a. the amplitudes of said elements increase, and their axis point to axis point distances decrease, from each end towards the center of said antenna array, b. each adjacent pair of elements of said antenna array conforms substantially to an adjacent pair of elements of a respective Dolph-Tchebycheff array of a length equal to the length of said antenna array, c. each such Dolph-Tchebycheff array has a number of elements related to the axis point to axis point distance of one of the respective pair of elements of said antenna array, and d. each such Dolph-Tchebycheff array has substantially the same main lobe direction, and substantially the same main lobe to side-lobe ratio.
Claim 2
Dependent Claim
178 words
A microwave antenna array comprising a conductor adapted to be capable of transmission or reception of energy, said conductor being constructed to undulate about an axis so as to form a series of transmitting or receiving elements disposed on alternate sides of said axis, the amplitude and distance from axis point to axis point of said elements being progressively altered along said antenna array, wherein a. the amplitudes of said elements increase, and their axis point to axis point distances decrease, from each end towards the center of said antenna array, b. each adjacent pair of elements of said antenna array conforms substantially to an adjacent pair of elements of a respective Dolph-Tchebycheff array of a length equal to the length of said antenna array, c. each such Dolph-Tchebycheff array has a number of elements related to the axis point to axis point distance of one of the respective pair of elements of said antenna array, and d. each such Dolph-Tchebycheff array has substantially the same main lobe direction, and substantially the same main lobe to side-lobe ratio.
Claim 3
Dependent Claim
24 words
An array according to claim 1 in which said transmitting or receiving elements disposed on alternate sides of said axis comprise circUlarly arcuate elements.
Claim 4
Dependent Claim
24 words
An array according to claim 1 in which said transmitting or receiving elements disposed on alternate sides of said axis comprise part sinusoidal elements.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |