US4021814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broadband corrugated horn with double-ridged circular waveguide
Assignee: United States Department of the Army
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Filing: 1976-01-19
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Granted: 1977-05-03
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Expires: 1996-01-19
Abstract
Abstract A broad band corrugated horn antenna with a double-ridged circular wavegu feed is disclosed in which the horn is driven by the wide band signal source having a bandwidth greater than 2:1. The bandwidth is accomplished by providing a ridge pattern with gaps therebetween in which the width of the gaps is greater than the width of the ridges.
Inventors
- 👤 John L. Kerr
- 👤 Michael J. Timochko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:44
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/02; H01Q13/0208
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A microwave corrugated horn antenna for operating over a frequency bandwidth greater than two to one comprising a plurality of ridges each having a predetermined width and a plurality of gaps of predetermined width disposed therebetween, the width of said gaps exceeding the width of said ridges and the width of each said gap being substantially 0.38λ where λ is the wavelength at the upper end of the frequency band of operation and the depth of said gaps being less than one quarter wavelength at the lower end of the operating frequency band.
Claim 2
Dependent Claim
93 words
A microwave corrugated horn antenna for operating over a frequency bandwidth greater than two to one comprising a plurality of ridges each having a predetermined width and a plurality of gaps of predetermined width disposed therebetween, the width of said gaps exceeding the width of said ridges and the width of each said gap being substantially 0.38λ where λ is the wavelength at the upper end of the frequency band of operation and the depth of said gaps being less than one quarter wavelength at the lower end of the operating frequency band.
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) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |