US3718869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave oscillator with coaxial leakage output coupling
Assignee: United States Department of the Army
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Filing: 1971-03-29
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Granted: 1973-02-27
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Expires: 1991-03-29
Abstract
Abstract An improved coupling arrangement between a cavity resonator with associated microwave generator and the load. The cavity includes a radial line coupling in the form of a disc capacitively coupled to a planar load terminal. The disc is concave relative to the load terminal in order to effect a uniform impedance at all radial portions of the coupling and to provide the optimum impedance match.
Inventors
- 👤 H Gerlach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:16
CPC Classifications
H; H03; H03B; H03B9/00; H03B9/12; H03B9/14; H03B9/145; H03B5/00; H03B5/18; H03B5/1817; H03B5/1835
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
A microwave generator including a. an active element for generating high frequency oscillations, b. a resonant cavity housing said active element and electromagnetically coupled thereto, c. an output coupling including a plate disposed within and spaced from one end of said resonant cavity and capacitively coupled to a rf output probe, said probe being spaced equidistant with respect to said plate, d. the space between said plate and said one end of said resonant cavity defining a radial transmission line means for capacitively coupling said resonant cavity to said output probe, said radial transmission line means being of such a shape that the characteristic impedance of said radial transmission line is substantially constant in a radial direction to facilitate optimum impedance matching between said resonant cavity and the rf output.
Claim 2
Dependent Claim
130 words
A microwave generator including a. an active element for generating high frequency oscillations, b. a resonant cavity housing said active element and electromagnetically coupled thereto, c. an output coupling including a plate disposed within and spaced from one end of said resonant cavity and capacitively coupled to a rf output probe, said probe being spaced equidistant with respect to said plate, d. the space between said plate and said one end of said resonant cavity defining a radial transmission line means for capacitively coupling said resonant cavity to said output probe, said radial transmission line means being of such a shape that the characteristic impedance of said radial transmission line is substantially constant in a radial direction to facilitate optimum impedance matching between said resonant cavity and the rf output.
Claim 3
Dependent Claim
36 words
The generator of claim 1 including a. a high ac impedance filter electrically connected between said plate and an external source of dc bias potential, whereby the ac and dc potentials on the plate are isolated.
Claim 4
Dependent Claim
20 words
The generator of claim 1 including an insulating medium between said one end of said cavity and said output plate.
Claim 5
Dependent Claim
21 words
The generator of claim 1 wherein said output coupling is connected to a cone-shaped antenna having a continuous annular slot therein.
Claim 6
Dependent Claim
18 words
The generator of claim 1 wherein said surface of said plate facing said one cavity end is concave.
References Cited (Backward Citations)
US3416098A
Cited
US3418601A
Cited
US3534293A
Cited
US3593193A
Cited
US3562666A
Cited
US3605034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |