Patent US3942138A successfully refreshed from Google Patents.
US3942138A
Expired / Lapsed
US
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Short depth hardened waveguide launcher assembly element
Assignee: United States Department of the Air Force
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Filing: 1974-02-04
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Granted: 1976-03-02
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Expires: 1994-02-04
Abstract
Abstract A waveguide launcher apparatus for coupling a coaxial transmission line to a waveguide array antenna element. The waveguide launcher apparatus utilizes its short depth to achieve the desired match between the coaxial connector and free space. The launcher apparatus has an L shape which performs as a matching element and as an adaptor between the coax transmission line and wave guide sections.
Inventors
- 👤 William Hugh Schaedla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 21:07
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/06; H01P; H01P5/00; H01P5/08; H01P5/10; H01P5/103
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
171 words
A short depth hardened waveguide launcher apparatus comprising in combination: means forming a waveguide cavity having a first and second end, said first end having a coaxial connector mounted thereon, said coaxial connector having a center conductor extending within said waveguide cavity, said second end having a window mounted therein, said waveguide cavity comprising a first and second waveguide cavity, said first waveguide cavity being smaller than said second waveguide cavity, said first waveguide cavity being positioned at said first end, and a waveguide launcher means mounted within said waveguide cavity, said waveguide launcher means being equidistantly positioned within said first waveguide cavity, said first waveguide cavity having a cavity length equal to the horizontal length of said waveguide launcher means, said waveguide launcher means being connected to center conductor of said coaxial connector said waveguide launcher means being vertically disposed within said first waveguide cavity, said center conductor of said waveguide launcher means in combination with said first cavity providing the desired match between said coax connector and free space.
Claim 2
Dependent Claim
171 words
A short depth hardened waveguide launcher apparatus comprising in combination: means forming a waveguide cavity having a first and second end, said first end having a coaxial connector mounted thereon, said coaxial connector having a center conductor extending within said waveguide cavity, said second end having a window mounted therein, said waveguide cavity comprising a first and second waveguide cavity, said first waveguide cavity being smaller than said second waveguide cavity, said first waveguide cavity being positioned at said first end, and a waveguide launcher means mounted within said waveguide cavity, said waveguide launcher means being equidistantly positioned within said first waveguide cavity, said first waveguide cavity having a cavity length equal to the horizontal length of said waveguide launcher means, said waveguide launcher means being connected to center conductor of said coaxial connector said waveguide launcher means being vertically disposed within said first waveguide cavity, said center conductor of said waveguide launcher means in combination with said first cavity providing the desired match between said coax connector and free space.
Claim 3
Dependent Claim
74 words
A short depth hardened waveguide launcher apparatus as described in claim 1 wherein said waveguide launcher means comprises an L-shaped element having a first and second member, said first member having a length greater than said second member, said first member being axially with and connected to said center conductor of said coaxial connector, said second member being mounted to said waveguide cavity, said first and second members being joined at a common end.
Claim 4
Dependent Claim
25 words
A short depth hardened waveguide launcher apparatus as described in claim 2 wherein said L-shaped element has a short intrusion profile into said waveguide cavity.
Claim 5
Dependent Claim
38 words
A short depth hardened waveguide launcher apparatus as described in claim 2 wherein said window comprises a beryllium oxide window having an average dielectric constant, K o , equal to 6.55 to 6.75 at 25°C and 1.3 GHz.
Claim 6
Dependent Claim
35 words
A short depth hardened waveguide launcher apparatus as described in claim 4 wherein said beryllium oxide window forms an aperture which is tuned for match at midband and presents a mismatch at the band edges.
Claim 7
Dependent Claim
30 words
A short depth hardened waveguide launcher apparatus as described in claim 5 wherein said waveguide launcher apparatus dimensions are scaled proportional to the wavelength of the center frequency of operation.
Claim 8
Dependent Claim
22 words
A short depth hardened waveguide launcher apparatus as described in claim 6 wherein said first and second members are rectangular in shape.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |