US3714592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Network for pulling a microwave generator to the frequency of its resonant load
Assignee: Varian Medical Systems Inc
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Filing: 1971-12-06
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Granted: 1973-01-30
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Expires: 1991-12-06
Abstract
Abstract A resonant microwave load, such as a microwave linear accelerator section, is coupled to a magnetron oscillator via the intermediary of a circulator. Power reflected from the resonant load is reflected to the circulator and thence to a wave absorptive load. A composite wave reflector and variable phase shifter is provided between the absorptive load and the circulator for reflecting a portion of the power reflected from the resonant load to the magnetron oscillator for pulling the frequency of the oscillator to the frequency of the resonant load. The composite wave reflector and variable phase shifter includes a wave reflective member carried from a support rod passing through the wall of a rectangular waveguide. Rotation of the support rod causes the wave reflective member to move in a generally axial direction within the waveguide for adjusting the phase of the reflected wave such as to pull the frequency of the magnetron to the frequency of the resonant load.
Inventors
- 👤 H Jory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:21
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/18; H01P1/182; H01J; H01J23/00; H01J23/16; H01J23/18; H01J23/34
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
218 words
A microwave network for pulling the frequency of a microwave generator to the frequency of its resonant load, said network comprising isolator means having at least three ports connected between the microwave generator and the resonant load for Channeling microwave output energy from the microwave generator to the resonant load through first and second ports of said isolator means and for channeling substantially all power reflected from the resonant load to a third port of said isolator means, power absorbing means connected to said third port of said isolator means for absorbing the power reflected from said resonant load, microwave reflector means connected in circuit between said power absorbing means and said isolator means for reflecting a portion only of the energy reflected from the resonant load to the microwave generator, substantially all of said portion of said reflected energy being channeled through said isolator means to said microwave generator only, said microwave reflector means comprising a section of hollow waveguide, a movable support member, a microwave reflective element disposed within said waveguide and carried on said movable support member, means for moving said support member relative to said waveguide to cause movement of said microwave reflective element within said waveguide and thereby to produce a variable phase shift in the microwave energy reflected to the microwave generator.
Claim 2
Dependent Claim
218 words
A microwave network for pulling the frequency of a microwave generator to the frequency of its resonant load, said network comprising isolator means having at least three ports connected between the microwave generator and the resonant load for Channeling microwave output energy from the microwave generator to the resonant load through first and second ports of said isolator means and for channeling substantially all power reflected from the resonant load to a third port of said isolator means, power absorbing means connected to said third port of said isolator means for absorbing the power reflected from said resonant load, microwave reflector means connected in circuit between said power absorbing means and said isolator means for reflecting a portion only of the energy reflected from the resonant load to the microwave generator, substantially all of said portion of said reflected energy being channeled through said isolator means to said microwave generator only, said microwave reflector means comprising a section of hollow waveguide, a movable support member, a microwave reflective element disposed within said waveguide and carried on said movable support member, means for moving said support member relative to said waveguide to cause movement of said microwave reflective element within said waveguide and thereby to produce a variable phase shift in the microwave energy reflected to the microwave generator.
Claim 3
Dependent Claim
218 words
A microwave network for pulling the frequency of a microwave generator to the frequency of its resonant load, said network comprising isolator means having at least three ports connected between the microwave generator and the resonant load for Channeling microwave output energy from the microwave generator to the resonant load through first and second ports of said isolator means and for channeling substantially all power reflected from the resonant load to a third port of said isolator means, power absorbing means connected to said third port of said isolator means for absorbing the power reflected from said resonant load, microwave reflector means connected in circuit between said power absorbing means and said isolator means for reflecting a portion only of the energy reflected from the resonant load to the microwave generator, substantially all of said portion of said reflected energy being channeled through said isolator means to said microwave generator only, said microwave reflector means comprising a section of hollow waveguide, a movable support member, a microwave reflective element disposed within said waveguide and carried on said movable support member, means for moving said support member relative to said waveguide to cause movement of said microwave reflective element within said waveguide and thereby to produce a variable phase shift in the microwave energy reflected to the microwave generator.
Claim 4
Dependent Claim
218 words
A microwave network for pulling the frequency of a microwave generator to the frequency of its resonant load, said network comprising isolator means having at least three ports connected between the microwave generator and the resonant load for Channeling microwave output energy from the microwave generator to the resonant load through first and second ports of said isolator means and for channeling substantially all power reflected from the resonant load to a third port of said isolator means, power absorbing means connected to said third port of said isolator means for absorbing the power reflected from said resonant load, microwave reflector means connected in circuit between said power absorbing means and said isolator means for reflecting a portion only of the energy reflected from the resonant load to the microwave generator, substantially all of said portion of said reflected energy being channeled through said isolator means to said microwave generator only, said microwave reflector means comprising a section of hollow waveguide, a movable support member, a microwave reflective element disposed within said waveguide and carried on said movable support member, means for moving said support member relative to said waveguide to cause movement of said microwave reflective element within said waveguide and thereby to produce a variable phase shift in the microwave energy reflected to the microwave generator.
Claim 5
Dependent Claim
11 words
The apparatus of claim 1 wherein said support member is dielectric.
Claim 6
Dependent Claim
11 words
The apparatus of claim 1 wherein said support member is metal.
Claim 7
Dependent Claim
12 words
The apparatus of claim 1 wherein said microwave reflective element is dielectric.
Claim 8
Dependent Claim
12 words
The apparatus of claim 1 wherein said microwave reflective element is metal.
Claim 9
Dependent Claim
14 words
The apparatus of claim 1 wherein said microwave reflective element is cylindrical in shape.
Claim 10
Dependent Claim
14 words
The apparatus of claim 1 wherein said microwave reflective element is spherical in shape.
Claim 11
Dependent Claim
111 words
The apparatus of claim 1 wherein said hollow waveguide is rectangular having a pair of parallel broad walls interconnected by a pair of parallel narrow side walls, and wherein said support member is pivotable and generally L-shaped with one leg thereof extending through one of said broad walls generally perpendicular thereto and with the other leg thereof extending generally perpendicular to the plane of said narrow side walls, whereby rotation of said support member about the axis of said one leg extending through said broad wall causes translation of said microwave reflective element carried from said other leg, such translation of said microwave reflective element being generally axial of the waveguide.
Claim 12
Dependent Claim
34 words
The apparatus of claim 1 additionally comprising seal means for rotational sealing said support member to said waveguide to allow a pressure differential to be maintained between the atmospheres inside and outside said waveguide.
Claim 13
Dependent Claim
18 words
The apparatus of claim 1 wherein the resonant load comprises a linear accelerator section for accelerating charge particles.
Claim 14
Dependent Claim
13 words
The apparatus of claim 1 wherein the microwave generator comprises a magnetron oscillator.
Claim 15
Dependent Claim
13 words
The apparatus of claim 1 wherein the isolator means comprises a microwave circulator.
Claim 16
Dependent Claim
156 words
A composite microwave reflector and variable phase shifter comprising a section of hollow waveguide, said hollow waveguide having a pair of parallel broad walls interconnected by a pair of parallel narrow side walls, a movable support member, said support member being pivotable and generally L-shaped with one leg thereof extending through one of said broad walls generally perpendicular thereto and with the other leg thereof extending generally perpendicular to the plane of said narrow side walls, a microwave reflective element disposed within said waveguide and carried on said movable support member, whereby rotation of said support member about the axis of said one leg extending through said broad wall causes translation of said microwave reflective element carried from said other leg, said translation of said microwave reflective element being generally axial of said hollow waveguide, said translation of said microwave reflective element thereby producing a variable phase shift of microwave energy reflected thereby to the waveguide.
Claim 17
Dependent Claim
156 words
A composite microwave reflector and variable phase shifter comprising a section of hollow waveguide, said hollow waveguide having a pair of parallel broad walls interconnected by a pair of parallel narrow side walls, a movable support member, said support member being pivotable and generally L-shaped with one leg thereof extending through one of said broad walls generally perpendicular thereto and with the other leg thereof extending generally perpendicular to the plane of said narrow side walls, a microwave reflective element disposed within said waveguide and carried on said movable support member, whereby rotation of said support member about the axis of said one leg extending through said broad wall causes translation of said microwave reflective element carried from said other leg, said translation of said microwave reflective element being generally axial of said hollow waveguide, said translation of said microwave reflective element thereby producing a variable phase shift of microwave energy reflected thereby to the waveguide.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |