US3576581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radomes
Assignee: General Dynamics Corp
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Filing: 1968-08-15
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Granted: 1971-04-27
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Expires: 1988-08-15
Abstract
Abstract A radome especially suitable for circularly polarized waves and antennas is described. The radome has an anisotropic core made up of parallel dielectric strips which may be in the form of dielectric rings which extend circumferentially around the wall of dielectric material which makes up the radome. Alternatively, the strips may extend longitudinally along the wall.
Inventors
- 👤 Gus P Tricoles
- 👤 Eugene L Rope
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:04
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/42
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
86 words
A radome comprising: a. a sheet of dielectric material, and b. an array of thin strips of dielectric material supported edgewise on said sheet with the edges of said strips in contact with said sheet, said strips being arranged in planes spaced from each other, said planes being parallel to the plane of incidence of at least one of two polarizations of radiation which are perpendicular to each other, said planes lying transverse to said sheet, said array providing anisotropy favoring said one polarization of radiation.
Claim 2
Dependent Claim
86 words
A radome comprising: a. a sheet of dielectric material, and b. an array of thin strips of dielectric material supported edgewise on said sheet with the edges of said strips in contact with said sheet, said strips being arranged in planes spaced from each other, said planes being parallel to the plane of incidence of at least one of two polarizations of radiation which are perpendicular to each other, said planes lying transverse to said sheet, said array providing anisotropy favoring said one polarization of radiation.
Claim 3
Dependent Claim
16 words
The invention as set forth in claim 1 wherein said strips are parallel to each other.
Claim 4
Dependent Claim
49 words
The invention as set forth in claim 2 wherein said strips each are at least a quarter wavelength in a direction along the plane of said one polarization of radiation and are a fraction of said quarter wavelength in thickness measured from side to side along their supported edges.
Claim 5
Dependent Claim
41 words
The invention as set forth in claim 3 wherein the spacing of said strips from each other is equal and is from one-half to 1 1/2 of a wavelength of the frequency of the radiation to be transmitted through said radome.
Claim 6
Dependent Claim
23 words
The invention as set forth in claim 1 wherein said sheet has a honeycomb of cells of dielectric material thereon between said strips.
Claim 7
Dependent Claim
25 words
The invention as set forth in claim 5 wherein said cells are rectangular in shape and have their longer dimension substantially parallel to said strips.
Claim 8
Dependent Claim
30 words
The invention as set forth in claim 1 wherein said sheet is conical in shape, said strips being disposed on the inner surface of the cone formed by said sheet.
Claim 9
Dependent Claim
23 words
The invention as set forth in claim 7 wherein said strips are circular discs having their axes along the axis of said cone.
Claim 10
Dependent Claim
27 words
The invention as set forth in claim 8 wherein said sheet is about one-half wavelength in thickness at the frequency of the radiation transmitted through said radome.
Claim 11
Dependent Claim
50 words
The invention as set forth in claim 1 wherein said sheet forms a conical surface and said strips are disposed along the axis of said conical surface equally spaced from each other and directed so that the intersection of lines extending therefrom is at the apex of said conical surface.
Claim 12
Dependent Claim
40 words
The invention as set forth in claim 10 wherein said radome is an A-sandwich having inner and outer skins of dielectric material, said outer skin being comprised of said sheet and wherein said strips comprise the core of said sandwich.
Claim 13
Dependent Claim
36 words
The invention as set forth in claim 11 wherein said core includes a honeycomb of rectangular cells of dielectric material disposed between said strips, the long dimension of said cells being substantially parallel to said strips.
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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |