US3883822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Negative resistance diode oscillator
Assignee: Thales SA
•
Filing: 1973-12-10
•
Granted: 1975-05-13
•
Expires: 1993-12-10
Abstract
Abstract An oscillator comprises a main cavity resonating in accordance with a given wave mode and frequency, and a negative-resistance diode whose axis lies in a transverse plane separating the main cavity from an auxiliary cavity. The auxiliary cavity is terminated in a matched load in order to prevent any risk of parasitic oscillation.
Inventors
- 👤 Jean-Raymond Basset
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:19
CPC Classifications
H; H03; H03B; H03B9/00; H03B9/12; H03B9/14; H03B9/141
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
105 words
An oscillator comprising: a metallic body formed with a prismatic main cavity, resonant at a predetermined operating frequency, and an adjoining low-Q auxiliary cavity constituting an extension of said main cavity, said cavities meeting at a common transverse plane; a negative-resistance diode with an axis in said plane connected across said cavities, said main cavity having an output end coupled to an external load and spaced from said plane by substantially half a wavelength at said operating frequency; and a dissipative load in said auxiliary cavity separated from said plane by a distance substantially less than the spacing of said plane from said output end.
Claim 2
Dependent Claim
105 words
An oscillator comprising: a metallic body formed with a prismatic main cavity, resonant at a predetermined operating frequency, and an adjoining low-Q auxiliary cavity constituting an extension of said main cavity, said cavities meeting at a common transverse plane; a negative-resistance diode with an axis in said plane connected across said cavities, said main cavity having an output end coupled to an external load and spaced from said plane by substantially half a wavelength at said operating frequency; and a dissipative load in said auxiliary cavity separated from said plane by a distance substantially less than the spacing of said plane from said output end.
Claim 3
Dependent Claim
22 words
An oscillator as defined in claim 1, further comprising tuning means for said main cavity in said plane adjacent said negative-resistance diode.
Claim 4
Dependent Claim
15 words
An oscillator as defined in claim 2 wherein said tuning means comprises a varactor diode.
References Cited (Backward Citations)
US3711792A
Cited
US3803513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |