US3810045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Push-pull transferred-electron device circuit
Assignee: Varian Medical Systems Inc
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Filing: 1972-11-03
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Granted: 1974-05-07
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Expires: 1992-11-03
Abstract
Abstract A pair of transferred-electron devices, such as Gunn diodes, are spaced apart in a hollow microwave conductor operating in a TE or TM mode. The Gunn devices are coupled in energy exchanging relation to the fields of the operating mode and are spaced apart by approximately an integer number of full wavelengths and in such a manner that the devices are coupled to approximately equal electromagnetic wave energy fields of opposite phase to obtain a push-pull configuration. Output energy is extracted from the operating mode.
Inventors
- 👤 T Ruttan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:43
CPC Classifications
H; H03; H03B; H03B9/00; H03B9/12; H03B9/14; H03B9/143
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
132 words
In a push-pull transferred-electron device circuit: means for defining a hollow electrical conductor for supporting electromagnetic wave energy therein in a predetermined TE or TM mode at a predetermined operating wavelength; a pair of transferred-electron devices disposed in said hollow conductor and coupled in energy exchanging relation to the fields of said predetermined operating mode, said pair of transferred-electron devices being spaced apart in said hollow conductor by approximately an integer number of full wavelengths of said predetermined operating mode, said pair of devices being coupled to approximately equal electromagnetic fields of opposite time phase of said operating mode such that the energies of said wavelength spaced devices adds in phase in said operating mode, and an output coupling means for coupling wave energy from said operating mode to a utilization circuit.
Claim 2
Dependent Claim
132 words
In a push-pull transferred-electron device circuit: means for defining a hollow electrical conductor for supporting electromagnetic wave energy therein in a predetermined TE or TM mode at a predetermined operating wavelength; a pair of transferred-electron devices disposed in said hollow conductor and coupled in energy exchanging relation to the fields of said predetermined operating mode, said pair of transferred-electron devices being spaced apart in said hollow conductor by approximately an integer number of full wavelengths of said predetermined operating mode, said pair of devices being coupled to approximately equal electromagnetic fields of opposite time phase of said operating mode such that the energies of said wavelength spaced devices adds in phase in said operating mode, and an output coupling means for coupling wave energy from said operating mode to a utilization circuit.
Claim 3
Dependent Claim
17 words
The apparatus of claim 1 wherein said means for defining said hollow conductor comprises a cavity resonator.
Claim 4
Dependent Claim
74 words
The apparatus of claim 2 wherein said cavity resonator has a characteristic height, width, and length, and wherein the height is less than both the width and length, and wherein said output coupling means is disposed at a point intermediate said pair of transferred-electron devices and approximately an integer number of half wavelengths of said predetermined operating mode from one of said transferred-electron devices in a direction along the length of said cavity resonator.
Claim 5
Dependent Claim
73 words
The apparatus of claim 1 including, a pair of electrically conductive posts projecting into said hollow conductor in a direction generally perpendicular to the direction of the magnetic field vector of said predetermined operating mode of electro-magnetic wave energy in the vicinity of said post, and wherein each of said transferred-electron devices is interposed in the region between the inner ends of said posts and an opposed inside wall of said hollow conductor.
Claim 6
Dependent Claim
39 words
The apparatus of claim 4 including, lossy mode suppression members projecting into the interior of said hollow conductor in the region thereof adjacent said pair of posts for suppression of certain unwanted modes of oscillation within said hollow conductor.
Claim 7
Dependent Claim
59 words
The apparatus of claim 4 including, means for electrically insulatively supporting said posts from said hollow conductor for DC potential, radio frequency choke means associated with each of said posts for providing a radio frequency short between said posts and said hollow conductor while permitting independent DC bias potentials to be applied to said transferred-electron devices via said posts.
Claim 8
Dependent Claim
14 words
The apparatus of claim 5 wherein said lossy mode suppression members are lossy rods.
Claim 9
Dependent Claim
12 words
The apparatus of claim 2 including, means for tuning said cavity resonator.
Claim 10
Dependent Claim
29 words
The apparatus of claim 6 including, means for connecting said pair of transferred-electron devices in parallel with each other and in series with a source of DC bias potential.
References Cited (Backward Citations)
US3711792A
Cited
US3702977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |