Patent US4380014A successfully refreshed from Google Patents.
US4380014A
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Feed horn for reflector antennae
Assignee: Chaparral Communications Inc
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Filing: 1981-08-13
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Granted: 1983-04-12
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Expires: 2001-08-13
Abstract
Abstract An improved feed horn for use with long f/D reflector antennae comprising an aperture having a plurality of protuberances orthogonally disposed around the periphery thereof, a conical section, a waveguide transition section and an impedance matching section.
Inventors
- 👤 H. Taylor Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:07
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/02; H01Q13/0266
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
An electromagnetic feed horn for use with antenna reflectors in a waveguide transmission system, said feed horn comprising: an aperture for receiving electromagnetic waves, including a plurality of protuberances symmetrically disposed radially outward along the periphery thereof and orthogonal to the direction of propagation of said waves; a conical section coupled to the aperture for receiving electromagnetic signals therefrom; a waveguide mount for mounting the feed horn to the waveguide transmission system; an impedence matching section coupled to the waveguide mount, for matching the electromagnetic signal impedance of the feed horn to the waveguide system; and a waveguide transition section for coupling the conical section to the impedance matching section and for converting energy received from the conical section to signals propagating in a waveguide mode.
Claim 2
Dependent Claim
126 words
An electromagnetic feed horn for use with antenna reflectors in a waveguide transmission system, said feed horn comprising: an aperture for receiving electromagnetic waves, including a plurality of protuberances symmetrically disposed radially outward along the periphery thereof and orthogonal to the direction of propagation of said waves; a conical section coupled to the aperture for receiving electromagnetic signals therefrom; a waveguide mount for mounting the feed horn to the waveguide transmission system; an impedence matching section coupled to the waveguide mount, for matching the electromagnetic signal impedance of the feed horn to the waveguide system; and a waveguide transition section for coupling the conical section to the impedance matching section and for converting energy received from the conical section to signals propagating in a waveguide mode.
Claim 3
Dependent Claim
27 words
An electromagnetic feed horn as in claim 1 wherein the length of the protuberances are a preselected fraction of the wavelength of the frequency band of interest.
Claim 4
Dependent Claim
27 words
An electromagnetic feed horn as in claim 1 wherein the spacing of the protuberances is a preselected fraction of the wavelength of the frequency band of interest.
Claim 5
Dependent Claim
27 words
An electromagnetic feed horn as in claim 1 wherein the width of the protuberances is a preselected fraction of the wavelength of the frequency band of interest.
Claim 6
Dependent Claim
26 words
An electromagnetic feed horn as in claim 1 wherein the density of the protuberances does not exceed a preselected ratio of protuberance diameter to protuberance spacing.
Claim 7
Dependent Claim
29 words
An electromagnetic feed horn as in claim 1 wherein the length of the waveguide transition section is a preselected fraction of the waveguide of the frequency band of interest.
References Cited (Backward Citations)
US4249183A
Cited
US4112432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-11 | 1986-10-11 | 1987-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-11 | 1990-10-11 | 1991-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-11 | 1994-10-11 | 1995-04-12 | $7700.00 | Window Closed / Lapsed |