US3848255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steerable radar antenna
Assignee: Teledyne Inc
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Filing: 1973-03-22
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Granted: 1974-11-12
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Expires: 1993-03-22
Abstract
Abstract A steerable radar antenna having a fixed energy feed requiring no rotary joints in the waveguide, including a microwave lens and a moveable reflector which operate conjunctively to collimate and direct the RF energy, and a drive means.
Inventors
- 👤 P Migdal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:38
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/12; H01Q15/00; H01Q15/23; H01Q19/00; H01Q19/10; H01Q19/104
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
66 words
A steerable radar antenna comprising: a drive assembly; a reflector having a generally hemispherical lens with the substantially planar surface thereof mounted on the reflective surface of said reflector, said reflector and lens comprising a unit operated by said drive assembly; and at least one stationary feed disposed adjacEnt to the generally hemispherical surface of said lens and capable of coupling RF energy to said lens.
Claim 2
Dependent Claim
66 words
A steerable radar antenna comprising: a drive assembly; a reflector having a generally hemispherical lens with the substantially planar surface thereof mounted on the reflective surface of said reflector, said reflector and lens comprising a unit operated by said drive assembly; and at least one stationary feed disposed adjacEnt to the generally hemispherical surface of said lens and capable of coupling RF energy to said lens.
Claim 3
Dependent Claim
96 words
A steerable radar antenna comprising: a drive assembly; a reflector operated by said drive assembly; a stationary punctiform feed for RF energy comprising: an open-ended waveguide; a rectangular-to-circular waveguide transition flanged to the open end of said waveguide; a polarizer to produce circular polarization attached to said waveguide transition such that circularly polarized energy is radiated from said polarizer generally in the direction of said reflector; and a microwave lens disposed between said energy feed and said reflector directing said RF energy toward said reflector and cooperating with said reflector to produce a collimated emitted beam.
Claim 4
Dependent Claim
96 words
A steerable radar antenna comprising: a drive assembly; a reflector operated by said drive assembly; a stationary punctiform feed for RF energy comprising: an open-ended waveguide; a rectangular-to-circular waveguide transition flanged to the open end of said waveguide; a polarizer to produce circular polarization attached to said waveguide transition such that circularly polarized energy is radiated from said polarizer generally in the direction of said reflector; and a microwave lens disposed between said energy feed and said reflector directing said RF energy toward said reflector and cooperating with said reflector to produce a collimated emitted beam.
Claim 5
Dependent Claim
48 words
A steerable radar antenna comprising: a drive assembly; a cylindrical radome; an elliptical reflector diagonally disposed in said radome and operated by said drive assembly; a stationary feed to couple RF energy to said reflector; and a Fresnel-zoned plate lens disposed between said energy feed and said reflector.
Claim 6
Dependent Claim
48 words
A steerable radar antenna comprising: a drive assembly; a cylindrical radome; an elliptical reflector diagonally disposed in said radome and operated by said drive assembly; a stationary feed to couple RF energy to said reflector; and a Fresnel-zoned plate lens disposed between said energy feed and said reflector.
References Cited (Backward Citations)
US1931980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |