Patent US3699475A successfully refreshed from Google Patents.
US3699475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-mode tuned microwave oscillator
Assignee: AG Communication Systems Corp
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Filing: 1971-02-16
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Granted: 1972-10-17
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Expires: 1991-02-16
Abstract
Abstract Two lengths of short circuited transmission lines that are defined by their odd and even-mode characteristics are connected to a microwave transistor to provide the external feedback network of a microwave oscillator. The feedback network may be obtained by using separate odd and even-mode transmission lines or, alternatively, the odd and even-mode transmission lines may be combined to form an extremely compact oscillator. Even when so combined, the positions of short circuits on the transmission line may be adjusted to permit frequency tuning and power peaking of the oscillator.
Inventors
- 👤 Robert G Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:03
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/04; H03; H03B; H03B5/00; H03B5/18; H03B5/1805; H03B5/1841; H03B5/1847
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
64 words
A solid-state microwave oscillator comprising: transmission line means geometrically configured to support both even and odd-mode electromagnetic waves, said transmission line means comprising; two parallel conductors; and first and second short-circuiting means interconnecting said parallel conductors; and amplifying means coupled to the transmission line means, said transmission line means forming an external feedback path around the amplifying means causing said amplifying means to oscillate.
Claim 2
Dependent Claim
64 words
A solid-state microwave oscillator comprising: transmission line means geometrically configured to support both even and odd-mode electromagnetic waves, said transmission line means comprising; two parallel conductors; and first and second short-circuiting means interconnecting said parallel conductors; and amplifying means coupled to the transmission line means, said transmission line means forming an external feedback path around the amplifying means causing said amplifying means to oscillate.
Claim 3
Dependent Claim
78 words
A solid-state microwave oscillator comprising: transmission line means geometrically configured to support both even and odd-mode electromagnetic waves, said transmission line means comprising; an electrically conductive cylindrical cavity having an end wall; and two parallel conductors mounted within said cavity and short-circuited together by the end wall of said cavity; and amplifying means coupled to the transmission line means, said transmission line means forming an external feedback path around the amplifying means causing said amplifying means to oscillate.
Claim 4
Dependent Claim
78 words
A solid-state microwave oscillator comprising: transmission line means geometrically configured to support both even and odd-mode electromagnetic waves, said transmission line means comprising; an electrically conductive cylindrical cavity having an end wall; and two parallel conductors mounted within said cavity and short-circuited together by the end wall of said cavity; and amplifying means coupled to the transmission line means, said transmission line means forming an external feedback path around the amplifying means causing said amplifying means to oscillate.
Claim 5
Dependent Claim
79 words
A solid-state microwave oscillator comprising: transmission line means geometrically configured to support both even and odd-mode electromagnetic waves, said transmission line means comprising; an electrically conductive rectangular cavity having an end wall; and two parallel conductors mounted wIthin said rectangular cavity and short-circuited together by the end wall of said cavity; and amplifying means coupled to the transmission line means, said transmission line means forming an external feedback path around the amplifying means causing said amplifying means to oscillate.
Claim 6
Dependent Claim
79 words
A solid-state microwave oscillator comprising: transmission line means geometrically configured to support both even and odd-mode electromagnetic waves, said transmission line means comprising; an electrically conductive rectangular cavity having an end wall; and two parallel conductors mounted wIthin said rectangular cavity and short-circuited together by the end wall of said cavity; and amplifying means coupled to the transmission line means, said transmission line means forming an external feedback path around the amplifying means causing said amplifying means to oscillate.
Claim 7
Dependent Claim
102 words
A solid-state microwave oscillator comprising: transmission line means geometrically configured to support both even and odd-mode electromagnetic waves, said transmission line means comprising; ground reference surface means; two parallel conductors located with respect to said ground reference means for supporting both odd and even modes of propagation; first short-circuit means electrically connecting said two parallel conductors together; and second short-circuit means electrically connecting said two parallel conductors together and to said ground reference means; and amplifying means coupled to the transmission line means, said transmission line means forming an external feedback path around the amplifying means causing said amplifying means to oscillate.
Claim 8
Dependent Claim
102 words
A solid-state microwave oscillator comprising: transmission line means geometrically configured to support both even and odd-mode electromagnetic waves, said transmission line means comprising; ground reference surface means; two parallel conductors located with respect to said ground reference means for supporting both odd and even modes of propagation; first short-circuit means electrically connecting said two parallel conductors together; and second short-circuit means electrically connecting said two parallel conductors together and to said ground reference means; and amplifying means coupled to the transmission line means, said transmission line means forming an external feedback path around the amplifying means causing said amplifying means to oscillate.
Claim 9
Dependent Claim
33 words
A microwave oscillator as in claim 4, wherein said amplifying means is connected to said parallel conductors at points between the positions of said first and second short circuit means on said conductors.
Claim 10
Dependent Claim
29 words
A microwave oscillator as in claim 5, said first and second short circuit means being movable for changing the positions thereof on said parallel conductors for tuning the oscillator.
Claim 11
Dependent Claim
40 words
A microwave oscillator as in claim 6 wherein said first short circuit means comprises a trombone sliding structure cooperating with said parallel conductors for electrically maintaining the position of the first short circuit proximate associated ends of said parallel conductors.
Claim 12
Dependent Claim
28 words
A microwave oscillator as in claim 4, wherein said amplifying means is connected to adjacent ends of said parallel conductors that are closest to said first short-circuiting means.
Claim 13
Dependent Claim
16 words
A microwave oscillator as in claim 8, wherein: said transmission line means is a stripline circuit.
Claim 14
Dependent Claim
30 words
A microwave oscillator as in claim 8, wherein at least said first short circuit means is movable for changing the position thereof on said parallel conductors for tuning the oscillator.
Claim 15
Dependent Claim
25 words
A microwave oscillator as in claim 8, wherein said ground reference surface means comprising an electrically conductive cavity in which said parallel conductors are located.
Claim 16
Dependent Claim
24 words
A microwave oscillator as in claim 11, wherein said first and second short circuit means comprise the same movable end wall of said cavity.
Claim 17
Dependent Claim
21 words
A microwave oscillator as in claim 11, wherein said second short circuit means comprises a movable end wall of said cavity.
Claim 18
Dependent Claim
67 words
A microwave oscillator as in claim 13, wherein said first short circuit means is physically located on said parallel conductors between said adjacent ends of the latter and said wall, said wall being electrically spaced greater than a half wavelength from said adjacent ends of said conductors for electrically positioning the second short circuit between said first short circuit means and said adjacent ends of said conductors.
Claim 19
Dependent Claim
110 words
A solid-state microwave oscillator comprising: transmission line means geometrically configured to support both even and odd-mode electromagnetic waves, said transmission line means comprising; ground reference surface means; two parallel conductors; first short-circuit means electrically connecting said two parallel conductors together; second short-circuit means electrically connecting said two parallel conductors together and to said ground reference surface means; and third short-circuit means connected across said two parallel conductors between the positions of said first and second short-circuit means on said conductors; and amplifying means coupled to adjacent ends of said parallel conductors, said transmission line means forming an external feedback path around the amplifying means causing said amplifying means To oscillate.
Claim 20
Dependent Claim
110 words
A solid-state microwave oscillator comprising: transmission line means geometrically configured to support both even and odd-mode electromagnetic waves, said transmission line means comprising; ground reference surface means; two parallel conductors; first short-circuit means electrically connecting said two parallel conductors together; second short-circuit means electrically connecting said two parallel conductors together and to said ground reference surface means; and third short-circuit means connected across said two parallel conductors between the positions of said first and second short-circuit means on said conductors; and amplifying means coupled to adjacent ends of said parallel conductors, said transmission line means forming an external feedback path around the amplifying means causing said amplifying means To oscillate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |