US3725824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact waveguide-coax transition
Assignee: United States Department of the Navy
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Filing: 1972-06-20
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Granted: 1973-04-03
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Expires: 1992-06-20
Abstract
Abstract A compact waveguide-to-coaxial transition coupling having a half-height waveguide with a shorted termination and with a tapered ridge waveguide section having a port therein one-quarter wavelength from the termination into which port is ''''floatingly'''' fitted a coaxial line termination with impedance matching steps thereon, and inductive buttons on the side walls of the half-height waveguide laterally of the tapered ridge waveguide section to provide transition of microwave at a voltage standing wave ratio of 1.1 or less over at least a 13 percent band.
Inventors
- 👤 O Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:22
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/08; H01P5/10; H01P5/103
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
193 words
A compact waveguide-to-coaxial line transition coupling comprising: a section of 1/2 height waveguide for a predetermined microwave frequency ending in a shorted termination with an open circuited series stub and a coaxial line coupling stub in alignment in opposite walls thereof; a tapered ridge member having an opening therethrough on the thick end thereof mounted in said waveguide with said opening in alignment with said series and coupling stubs with said taper rising from said waveguide wall in a direction toward said shorting termination; a metal button on opposite side walls of said waveguide along the taper of said tapered ridge member; and a coaxial line entering through said coupling stub with a junction end concentrically supported floatingly within said tapered ridge member opening, said coaxial line within said coupling stud having impedance matching steps therein whereby a transition of microwave energy in said waveguide to said coaxial line and vice versa are accomplished with high power capability, with a voltage standing wave ratio of not over 1.1 over at least a 13 percent band, and with a half-height waveguide to a predetermined low impedance matching coaxial line providing a compact transition coupling.
Claim 2
Dependent Claim
193 words
A compact waveguide-to-coaxial line transition coupling comprising: a section of 1/2 height waveguide for a predetermined microwave frequency ending in a shorted termination with an open circuited series stub and a coaxial line coupling stub in alignment in opposite walls thereof; a tapered ridge member having an opening therethrough on the thick end thereof mounted in said waveguide with said opening in alignment with said series and coupling stubs with said taper rising from said waveguide wall in a direction toward said shorting termination; a metal button on opposite side walls of said waveguide along the taper of said tapered ridge member; and a coaxial line entering through said coupling stub with a junction end concentrically supported floatingly within said tapered ridge member opening, said coaxial line within said coupling stud having impedance matching steps therein whereby a transition of microwave energy in said waveguide to said coaxial line and vice versa are accomplished with high power capability, with a voltage standing wave ratio of not over 1.1 over at least a 13 percent band, and with a half-height waveguide to a predetermined low impedance matching coaxial line providing a compact transition coupling.
Claim 3
Dependent Claim
39 words
A compact waveguide-to-coaxial line transition coupling as set forth in claim 1 wherein said series and coaxial coupling stubs are centered one quarter wavelength from said shorted termination and said junction end of said coaxial line is one-quarter wavelength.
Claim 4
Dependent Claim
44 words
A compact waveguide-to-coaxial line transition coupling as set forth in claim 2 wherein said tapered ridge member is from 0.5 to 0.63 of a wavelength from the point of taper to the centerline of said opening and its width is 0.28 of a wavelength.
Claim 5
Dependent Claim
31 words
A compact waveguide-to-coaxial line transition coupling as set forth in claim 3 wherein said waveguide coupling section is about 0.188 of a wavelength high and about 0.8 of a wavelength wide.
Claim 6
Dependent Claim
25 words
A compact waveguide-to-coaxial line transition coupling as set forth in claim 4 wherein said metal buttons are each about 0.14 of a wavelength in diameter.
Claim 7
Dependent Claim
24 words
A compact waveguide-to-coaxial line transition coupling as set forth in claim 5 wherein said impedance matching steps are each about 0.145 of a wavelength.
Claim 8
Dependent Claim
29 words
A compact waveguide-to-coaxial line transition coupling as set forth in claim 6 wherein said concentric supporting of said coaxial line junction end is by a thin wall ''''Teflon'''' sleeve.
Claim 9
Dependent Claim
25 words
A compact waveguide-to-coaxial line transition coupling as set forth in claim 7 wherein said open-circuited series stub is a quarter-wave in series with said junction.
References Cited (Backward Citations)
US2633493A
Cited
US3087127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |