US3569975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase pattern correction for transmitter having a radome
Assignee: Goodyear Aerospace Corp
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Filing: 1968-11-05
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Granted: 1971-03-09
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Expires: 1988-11-05
Abstract
Abstract Apparatus for altering an electromagnetic wave phase configuration to a predetermined nonplanar front to compensate for radome phase distortion and which wave, upon exiting the radome, has a phase front which is planar.
Inventors
- 👤 George C Fretz Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:49
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/42; H01Q1/421; H01Q19/00; H01Q19/10; H01Q19/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
107 words
Electromagnetic wave phase-changing apparatus comprising: a. a radome; b. first means transmitting electromagnetic wave energy; and c. second means operatively mounted relative to the radome and said first means to alter the wave phase to a nonplanar configuration to compensate for radome phase distortion and produce an exiting wave having a predetermined phase front, and characterized in that the second means comprises an antenna reflector, and the first means comprises an electromagnetic wave feed means operatively positioned out of the focal point of the reflector to alter the wave phase configuration to a nonplanar front, whereby the waveform exiting from the radome has a predetermined phase front.
Claim 2
Dependent Claim
107 words
Electromagnetic wave phase-changing apparatus comprising: a. a radome; b. first means transmitting electromagnetic wave energy; and c. second means operatively mounted relative to the radome and said first means to alter the wave phase to a nonplanar configuration to compensate for radome phase distortion and produce an exiting wave having a predetermined phase front, and characterized in that the second means comprises an antenna reflector, and the first means comprises an electromagnetic wave feed means operatively positioned out of the focal point of the reflector to alter the wave phase configuration to a nonplanar front, whereby the waveform exiting from the radome has a predetermined phase front.
Claim 3
Dependent Claim
76 words
A system according to claim 1 where the distance the feed horn should be from the reflector is determined by the formula Delta (F.D.) (p-f) 1-cos Psi where Delta (F.D.) phase advance for the ith ray due to the feed horn displacement f distance from vertex to the focal point for the reflector p distance from the vertex to the new feed point Psi angle from the antenna centerline to the ith ray from the feed.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |