US5148131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coaxial-to-waveguide transducer with improved matching
Assignee: L3 Communications Electron Technologies Inc
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Filing: 1991-06-11
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Granted: 1992-09-15
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Expires: 2011-06-11
Abstract
Abstract An end portion (14a) of a center conductor (14) of a coaxial cable (16) protrudes transversely into a tubular waveguide (10) near an end thereof. A piston (22) having a stepped inner wall (24) closes the end of the waveguide (10). The inner wall (24) is formed with two or more steps (24a,24b,24c) which protrude axially into the waveguide (10) by different distances (L1,L2,L3), reducing the return loss and extending the bandwidth of the coaxial cable-to-waveguide transition.
Inventors
- 👤 Kurt Amboss
- 👤 Stephen L. Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:42
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/08; H01P5/10; H01P5/103
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
105 words
A coaxial-to-waveguide transducer, comprising: a waveguide including an elongated tubular wall having an end; a coaxial cable including a center conductor having an end portion which protrudes into the waveguide through the tubular wall adjacent to said end thereof; and a stepped wall which closes said end of the tubular wall said stepped wall comprising first, second and third step portions, said second step portion being disposed between said first and third step portions, said second step portion protruding axially into the waveguide further than said first step portion, and said third step portion protruding axially into the waveguide further than said second step portion.
Claim 2
Dependent Claim
105 words
A coaxial-to-waveguide transducer, comprising: a waveguide including an elongated tubular wall having an end; a coaxial cable including a center conductor having an end portion which protrudes into the waveguide through the tubular wall adjacent to said end thereof; and a stepped wall which closes said end of the tubular wall said stepped wall comprising first, second and third step portions, said second step portion being disposed between said first and third step portions, said second step portion protruding axially into the waveguide further than said first step portion, and said third step portion protruding axially into the waveguide further than said second step portion.
Claim 3
Dependent Claim
27 words
A transducer as in claim 1, in which: said end portion of the center conductor protrudes into the waveguide through the tubular wall in a transverse direction.
Claim 4
Dependent Claim
55 words
A transducer as in claim 1, in which: said end portion of the center conductor protrudes into the waveguide through the tubular wall in a transverse direction; and said second step portion is spaced from said first step portion and said third step portion is spaced from said second step portion in said transverse direction.
Claim 5
Dependent Claim
55 words
A transducer as in claim 1, in which: said end portion of the center conductor protrudes into the waveguide through the tubular wall in a transverse direction; and said third step portion is spaced from said second step portion and said second step portion is spaced from said first step portion in said transverse direction.
Claim 6
Dependent Claim
16 words
A transducer as in claim 1, in which the tubular wall has a rectangular inner cross-section.
Claim 7
Dependent Claim
69 words
A coaxial-to-waveguide transducer, comprising: a waveguide including an elongated tubular wall having an end; a coaxial cable including a center conductor having an end portion which protrudes into the waveguide through the tubular wall adjacent to said end thereof; and a stepped wall which closes said end of the tubular wall, said stepped wall including at least three step portions which protrude axially into the waveguide by different distances.
Claim 8
Dependent Claim
69 words
A coaxial-to-waveguide transducer, comprising: a waveguide including an elongated tubular wall having an end; a coaxial cable including a center conductor having an end portion which protrudes into the waveguide through the tubular wall adjacent to said end thereof; and a stepped wall which closes said end of the tubular wall, said stepped wall including at least three step portions which protrude axially into the waveguide by different distances.
Claim 9
Dependent Claim
27 words
A transducer as in claim 6 in which: said end portion of the center conductor protrudes into the waveguide through the tubular wall in a transverse direction.
Claim 10
Dependent Claim
31 words
A transducer as in claim 7 further comprising seal means disposed around said end portion of the center conductor for hermetically isolating the coaxial cable from the interior of the waveguide.
Claim 11
Dependent Claim
27 words
A transducer as in claim 8 in which the seal means comprises a ceramic dome window which sealingly fits over said end portion of the center conductor.
Claim 12
Dependent Claim
79 words
A coaxial-to-waveguide transducer, comprising: a waveguide including an elongated tubular wall having an end; a coaxial cable including a center conductor having an end portion which protrudes transversely into the waveguide through the tubular wall adjacent to said end thereof; and a stepped wall which closes said end of the tubular wall, said stepped wall including first and second block-shaped step portions, said first block-shaped step portion protruding axially into the waveguide further than said second block-shaped step portion.
Claim 13
Dependent Claim
79 words
A coaxial-to-waveguide transducer, comprising: a waveguide including an elongated tubular wall having an end; a coaxial cable including a center conductor having an end portion which protrudes transversely into the waveguide through the tubular wall adjacent to said end thereof; and a stepped wall which closes said end of the tubular wall, said stepped wall including first and second block-shaped step portions, said first block-shaped step portion protruding axially into the waveguide further than said second block-shaped step portion.
Claim 14
Dependent Claim
31 words
A transducer as in claim 10 further comprising seal means disposed around said end portions of the center conductor for hermetically isolating the coaxial cable from the interior of the waveguide.
Claim 15
Dependent Claim
27 words
A transducer as in claim 11 in which the seal means comprises a ceramic dome window which sealingly fits over said end portion of the center conductor.
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) | 1995-09-15 | 1996-03-16 | 1996-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-15 | 2000-03-16 | 2000-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-15 | 2004-03-16 | 2004-09-15 | $7700.00 | Window Closed / Lapsed |