US3818490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual frequency array
Assignee: Westinghouse Electric Corp
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Filing: 1972-08-04
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Granted: 1974-06-18
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Expires: 1992-08-04
Abstract
Abstract An antenna array having two repetitive radiator systems in a single aperture, operating in two distinct frequency ranges. Each radiator system includes an open-ended, circular waveguide and a parallel plate waveguide. A monopole or a dipole is situated between the plates of the parallel plate waveguide and normal to them. The dimensions of the waveguides and the spacings between them are chosen to provide isolation between the frequency ranges.
Inventors
- 👤 H Leahy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:04
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/24; H01Q21/06; H01Q5/00; H01Q5/40; H01Q5/42
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
140 words
An antenna adapted to operate in first and second frequency ranges comprising: a. a plurality of radiating horns for radiating energy within said first frequency range; b. a plurality of dipole radiating elements transversely mounted in a plurality of sections of open waveguide, each of said dipoles being designed to radiate energy in said second frequency range; e. means for mounting said horns and said sections of open waveguide to form a unitary antenna aperture comprising rows of radiating elements, the type of radiating element comprising the rows alternating between horns and dipoles in a direction substantially ninety degrees with respect to said waveguides, with said first and second frequency ranges, the dimension of said horns, the dimension of said dipole elements and the dimension of said open waveguide being selected to reduce the coupling between said horns and dipoles.
Claim 2
Dependent Claim
140 words
An antenna adapted to operate in first and second frequency ranges comprising: a. a plurality of radiating horns for radiating energy within said first frequency range; b. a plurality of dipole radiating elements transversely mounted in a plurality of sections of open waveguide, each of said dipoles being designed to radiate energy in said second frequency range; e. means for mounting said horns and said sections of open waveguide to form a unitary antenna aperture comprising rows of radiating elements, the type of radiating element comprising the rows alternating between horns and dipoles in a direction substantially ninety degrees with respect to said waveguides, with said first and second frequency ranges, the dimension of said horns, the dimension of said dipole elements and the dimension of said open waveguide being selected to reduce the coupling between said horns and dipoles.
Claim 3
Dependent Claim
140 words
An antenna adapted to operate in first and second frequency ranges, said antenna comprising a plurality of array elements assembled to form a unitary aperture structure with each element being substantially identical and including a first horn radiating element comprising an opening in a conductive strip for radiating energy within a first selected frequency band and a dipole element for radiating energy within a second selected frequency band, said dipole element being mounted substantially parallel to said strip and transverse across and near the open side of a section of open waveguide, the dimensions of said openings in said conductive strip, said dipole and said open waveguide being selected such that coupling between said horns and dipole is minimized, said elements being assembled such that Said dipoles and horns form rows with the type of radiating element alternating between rows.
Claim 4
Dependent Claim
140 words
An antenna adapted to operate in first and second frequency ranges, said antenna comprising a plurality of array elements assembled to form a unitary aperture structure with each element being substantially identical and including a first horn radiating element comprising an opening in a conductive strip for radiating energy within a first selected frequency band and a dipole element for radiating energy within a second selected frequency band, said dipole element being mounted substantially parallel to said strip and transverse across and near the open side of a section of open waveguide, the dimensions of said openings in said conductive strip, said dipole and said open waveguide being selected such that coupling between said horns and dipole is minimized, said elements being assembled such that Said dipoles and horns form rows with the type of radiating element alternating between rows.
Claim 5
Dependent Claim
33 words
An antenna array in accordance with claim 1 in which the spacing between adjacent radiating horns is less than one half of the wavelength of the highest frequency within said first frequency range.
Claim 6
Dependent Claim
25 words
An antenna in accordance with claim 1 in which the mechanical spacing of said dipoles is the same as the spacing of said radiating horns.
Claim 7
Dependent Claim
148 words
An antenna adapted to operate in first and second frequency ranges, said antenna comprising a plurality of array elements assembled to form a unitary aperture structure with each element of said array being substantially identical and including, a first radiating element comprising an opening in a conductive strip to form a horn for radiating energy within a first selected frequency band and a second dipole radiating element mounted transversely across and near the open edge of a section of open waveguide for radiating energy within a second selected frequency band, the dimension of said opening in said conductive strip, said second radiating element and said waveguide being selected such that coupling between said first and second radiating elements is minimized said elements being assembled to form said aperture such that said first and second radiating elements form rows with the type of radiating element alternating between adjacent rows.
Claim 8
Dependent Claim
148 words
An antenna adapted to operate in first and second frequency ranges, said antenna comprising a plurality of array elements assembled to form a unitary aperture structure with each element of said array being substantially identical and including, a first radiating element comprising an opening in a conductive strip to form a horn for radiating energy within a first selected frequency band and a second dipole radiating element mounted transversely across and near the open edge of a section of open waveguide for radiating energy within a second selected frequency band, the dimension of said opening in said conductive strip, said second radiating element and said waveguide being selected such that coupling between said first and second radiating elements is minimized said elements being assembled to form said aperture such that said first and second radiating elements form rows with the type of radiating element alternating between adjacent rows.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |