US3646565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horn-reflector antenna
Assignee: Scientific Atlanta LLC
•
Filing: 1970-02-17
•
Granted: 1972-02-29
•
Expires: 1990-02-17
Abstract
Abstract The present invention relates to a horn-reflector antenna and a method of making it. More particularly, it relates to a hornreflector antenna consisting of a hollow cone composed of a microwave transparent material, lined in part with a microwave reflective material and a paraboloidal reflecting section which intersects with and is secured to the open end of the cone, the cone being unlined adjacent the paraboloidal reflecting section so that a portion of the cone functions as the radome.
Inventors
- 👤 Glen P Robinson Jr
- 👤 Samuel F Hutchins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:06
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/42; H01Q13/00; H01Q13/02; H01Q19/00; H01Q19/10; H01Q19/12; H01Q19/13; H01Q19/132
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
161 words
A horn antenna comprising a hollow cone the cross section of which, in a plane perpendicular to the axis, is circular, a concave reflector which is a sector of a paraboloid of revolution and means connecting said cone and said reflector, the wide end of the cone being sectioned at an angle to the axis of the cone where it intersects said reflector and the apex of said cone coinciding with the focus of said paraboloid of revolution, said reflector and said cone together forming a substantially closed volume, a first portion only of said cone comprising a microwave reflective material and a second portion of said cone adjacent said reflector being transparent to microwaves and providing a radome, whereby energy introduced into said cone at its apex is reflected from said reflector and through said radome, said first portion comprising substantially all of said horn except the portion against which energy introduced at said apex is reflected from said reflector.
Claim 2
Dependent Claim
161 words
A horn antenna comprising a hollow cone the cross section of which, in a plane perpendicular to the axis, is circular, a concave reflector which is a sector of a paraboloid of revolution and means connecting said cone and said reflector, the wide end of the cone being sectioned at an angle to the axis of the cone where it intersects said reflector and the apex of said cone coinciding with the focus of said paraboloid of revolution, said reflector and said cone together forming a substantially closed volume, a first portion only of said cone comprising a microwave reflective material and a second portion of said cone adjacent said reflector being transparent to microwaves and providing a radome, whereby energy introduced into said cone at its apex is reflected from said reflector and through said radome, said first portion comprising substantially all of said horn except the portion against which energy introduced at said apex is reflected from said reflector.
Claim 3
Dependent Claim
23 words
A horn antenna as set forth in claim 1 including flange means adjacent the apex of said cone for coupling to a waveguide.
Claim 4
Dependent Claim
40 words
A horn antenna as set forth in claim 1 in which said cone is comprised of a microwave transparent material and in the microwave reflective portion of said cone the microwave transparent material is lined with a microwave reflective material.
Claim 5
Dependent Claim
18 words
A horn antenna as set forth in claim 3 in which the microwave transparent material is a plastic.
Claim 6
Dependent Claim
19 words
A horn antenna as set forth in claim 4 in which the plastic material is fiber glass reinforced plastic.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |