US4112432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Square horn antenna having improved ellipticity
Assignee: Raytheon Co
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Filing: 1976-10-21
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Granted: 1978-09-05
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Expires: 1996-10-21
Abstract
Abstract A multisided horn antenna such as a square horn is disclosed having an improved axial ratio circular polarization or ellipticity. Ellipticity of a square horn antenna is improved by placing a conical section or ring of conductive material at the aperture of a horn antenna. The conical ring causes a relatively directive beam having a low axial ratio to be produced throughout most of the pattern generated similar to that of a conical horn antenna. Yet, the square horn antenna provides increased power over a conical horn.
Inventors
- 👤 Mon N. Wong
- 👤 Timothy A. Crail
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:11
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/02; H01Q13/0241
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
120 words
A horn antenna having improved ellipticity, comprising: an N-sided horn antenna having a predetermined angle of flare, N being at least four, said horn having an input port and an aperture, said horn having a predetermined length; and a right circular truncated hollow conical section being mounted tangentially to the inside of said N-sided horn antenna at the aperture thereof, said conical section having a predetermined relatively short length and being of an electrically conductive material having a thickness of less than 0.1 wavelength and being attached to each side of said N-sided horn antenna so that a wave propagating through said conical section is not attenuated, said conical section being for improving the ellipticity of a wave passing therethrough.
Claim 2
Dependent Claim
120 words
A horn antenna having improved ellipticity, comprising: an N-sided horn antenna having a predetermined angle of flare, N being at least four, said horn having an input port and an aperture, said horn having a predetermined length; and a right circular truncated hollow conical section being mounted tangentially to the inside of said N-sided horn antenna at the aperture thereof, said conical section having a predetermined relatively short length and being of an electrically conductive material having a thickness of less than 0.1 wavelength and being attached to each side of said N-sided horn antenna so that a wave propagating through said conical section is not attenuated, said conical section being for improving the ellipticity of a wave passing therethrough.
Claim 3
Dependent Claim
40 words
The invention according to claim 1, wherein said right circular truncated hollow conical section comprises: a conical section being one-quarter wavelength in length and having an angle of flare greater than the angle of flare of said N-sided horn antenna.
Claim 4
Dependent Claim
18 words
The invention according to claim 1, wherein said N-sided horn antenna has four sides and a square cross-section.
Claim 5
Dependent Claim
105 words
A horn antenna having improved ellipticity, comprising: an N-sided horn antenna having a predetermined angle of flare, N being at least four, said horn antenna having a stepped transformer input port and an aperture port; and a ring member having a major diameter and a minor diameter, said ring member being mounted to the inside of said N-sided horn antenna at the aperture along said major diameter, said minor diameter being disposed so that said minor diameter does not contact said horn antenna, said ring member having a length of one-quarter wavelength and being of a conductive material having a thickness less than 0.1 wavelength.
Claim 6
Dependent Claim
105 words
A horn antenna having improved ellipticity, comprising: an N-sided horn antenna having a predetermined angle of flare, N being at least four, said horn antenna having a stepped transformer input port and an aperture port; and a ring member having a major diameter and a minor diameter, said ring member being mounted to the inside of said N-sided horn antenna at the aperture along said major diameter, said minor diameter being disposed so that said minor diameter does not contact said horn antenna, said ring member having a length of one-quarter wavelength and being of a conductive material having a thickness less than 0.1 wavelength.
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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |