US3843937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state oscillator
Assignee: Fujitsu Ltd
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Filing: 1972-12-26
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Granted: 1974-10-22
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Expires: 1992-12-26
Abstract
Abstract A solid state oscillator in which a coaxial side arm is attached to a waveguide at an appropriate position in a manner to intersect it at right angles thereto; A Gunn diode, Impatt diode or like solid state oscillation device is provided at the intersecting portion, the solid state oscillation device having connected thereto the tip of an inner conductor of the coaxial side arm. The space in the waveguide in the neighborhood of the place where the solid state oscillation device is disposed is made narrower than that of the other waveguide portion by raising the waveguide wall or projecting an outer conductor of the coaxial side arm into the waveguide. With this construction, the real and imaginary parts R and jX of the load impedance at the position of the solid state oscillation device can be separated from each other. This enables easy matching of the solid state oscillation device and the load, so that the maximum output power can be obtained at a desired frequency. Further, it is also possible to suppress spurious oscillation of the solid state oscillation device and simplify the overall circuit construction.
Inventors
- 👤 H Hayashi
- 👤 T Fujita
- 👤 N Tanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:51
CPC Classifications
H; H03; H03B; H03B9/00; H03B9/12; H03B9/14; H03B9/145; H03B2009/126
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
178 words
A solid state oscillator comprising: a waveguide having first and second pairs of opposite walls, a coaxial side arm attached at right angles to one of the side walls of one said pair thereof and defining a corresponding, intersecting portion of the waveguide, means projecting from one of said side walls of said given pair toward the other side wall in the said intersecting portion of the waveguide for reducing the effective dimensions of said waveguide in said intersecting portion thereof, said coaxial side arm having an inner conductor extending at its free end into said reduced dimension, intersecting portion of the waveguide, a solid state oscillation device mounted on the said free end of said inner conductor, and a short-circuiting plunger mounted for selective, variable positioning within said waveguide adjacent said intersecting portion thereof, the length of said inner conductor being selected in accordance with a desired oscillation frequency of said solid state oscillator and the position of said plunger being selected to determine independently of the said oscillation frequency, the output power level of said oscillator.
Claim 2
Dependent Claim
178 words
A solid state oscillator comprising: a waveguide having first and second pairs of opposite walls, a coaxial side arm attached at right angles to one of the side walls of one said pair thereof and defining a corresponding, intersecting portion of the waveguide, means projecting from one of said side walls of said given pair toward the other side wall in the said intersecting portion of the waveguide for reducing the effective dimensions of said waveguide in said intersecting portion thereof, said coaxial side arm having an inner conductor extending at its free end into said reduced dimension, intersecting portion of the waveguide, a solid state oscillation device mounted on the said free end of said inner conductor, and a short-circuiting plunger mounted for selective, variable positioning within said waveguide adjacent said intersecting portion thereof, the length of said inner conductor being selected in accordance with a desired oscillation frequency of said solid state oscillator and the position of said plunger being selected to determine independently of the said oscillation frequency, the output power level of said oscillator.
Claim 3
Dependent Claim
48 words
A solid state oscillator as recited in claim 1 wherein said projecting means comprises an element mounted on the side wall of said given pair opposite the side wall to which said coaxial side arm is connected, and said solid state oscillation device is disposed on said projection.
Claim 4
Dependent Claim
118 words
A solid state oscillator as recited in claim 2 wherein said waveguide has the dimension b between the said opposed side walls of said given pair and the dimension a between the opposed side walls of the other said pair, said coaxial side arm includes said inner conductor and an outer conductor, said inner conductor having an outside diameter D1 and said outer conductor having an inner diameter D2 and wherein: said projecting means comprises a cylindrical projection having a diameter D3 and an axial direction of h and wherein the aforesaid dimensions are selected in accordance with: D1 + D2 < 2a/ pi ; b/2 < h < 3/4 b; and 3/4 D2 < D3 < a.
Claim 5
Dependent Claim
129 words
A solid state oscillator as recited in claim 2 wherein said waveguide has the dimension b between the said opposed side walls of said given pair and the dimension a between the opposed side walls of the other said pair, said coaxial side arm includes said inner conductor and an outer conductor, said inner conductor having an outside diameter D1 and said outer conductor having an inner diameter D2, and wherein: said projecting means is of a rectangular cross-sectional configuration having a dimension Z in the direction of signal propagation within said waveguide, a transverse dimension X and a height h, and wherein said dimensions are selected in accordance with: 3/4 D2 < Z < a; b/2 < h < 3/4 b; and 3/4 D2 < X < a.
Claim 6
Dependent Claim
75 words
A solid state oscillator as recited in claim 1 wherein said coaxial side arm includes an outer conductor and wherein: said projecting means comprises an extension of said outer conductor of the coaxial side arm which extends from the said one of the said walls of said given pair toward the opposed wall of that given pair and wherein, said solid state oscillation device is disposed on said opposed side wall of said given pair.
Claim 7
Dependent Claim
155 words
A solid state oscillator as recited in claim 5 wherein said waveguide has the dimension b between the said opposed side walls of said given pair and the dimension a between the opposed side walls of the other said pair, said coaxial side arm includes said inner conductor and an outer conductor, said inner conductor having an outside diameter D1 and said outer conductor having an inner diameter D2 and wherein: said outer conductor of said coaxial side arm extends inwardly of the said one of said side walls of said given pair by a dimension h, and the dimensions of the spaced side walls include the dimension b between the pair of side walls to said one of which said coaxial side arm is attached and wherein the dimensions are selected in accordance with: D1 + D2 < 2a/ pi ; b/2 < h < 3/4 b; and 3/4 D2 < D3 < a.
References Cited (Backward Citations)
US3414841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |