US4847571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave oscillator integrated in a waveguide
Assignee: Thomson Hybrides et Microondes
•
Filing: 1988-03-17
•
Granted: 1989-07-11
•
Expires: 2008-03-17
Abstract
Abstract A negative-resistance diode oscillator tuned by a varactor as applicable to frequency-modulated transmitters or to receiver oscillators operating within the 56-100 GHz frequency band is integrated in a waveguide. The diode is encapsulated in a capped package and mounted on a ground-connected base. A coupling capacitor is fixed on the metallic cap of the package. A varactor having beam-lead connections is mounted as a bridge between the capacitor and a ground-connected metallic stud. The bias voltages are brought in the plane of the waveguide by means of two wires and two capacitors housed within orifices formed through the waveguide walls.
Inventors
- 👤 Jean Stevance
- 👤 Edmond Klein
- 👤 Georges Lleti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:14
CPC Classifications
H; H03; H03B; H03B9/00; H03B9/12; H03B9/14; H03B9/141; H03B2009/126; H03B2200/00; H03B2200/0014; H03B2200/0016; H03B2200/0028; H03B2200/003; H03B2200/004; H03B9/145; H03B9/146; H03C; H03C3/00; H03C3/10; H03C3/12; H03C3/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
128 words
A microwave oscillator integrated in a waveguide and having a negative-resistance diode frequency-tuned by a varactor, wherein: the diode encapsulated in a capped package is mounted on a metallic base and located at the level of one wall of the waveguide, a coupling capacitor is fixed on the metallic cap of the package by means of one of its electrodes, the varactor encapsulated in a package having beamlead connections is mounted as a bridge between the free access electrode of the capacitor and a groundconnected metallic stud fixed on the base, the diode bias voltage is supplied by means of a wire soldered on the cap, and the varactor bias voltage is supplied by means of a wire soldered on the free access electrode of the coupling capacitor.
Claim 2
Dependent Claim
128 words
A microwave oscillator integrated in a waveguide and having a negative-resistance diode frequency-tuned by a varactor, wherein: the diode encapsulated in a capped package is mounted on a metallic base and located at the level of one wall of the waveguide, a coupling capacitor is fixed on the metallic cap of the package by means of one of its electrodes, the varactor encapsulated in a package having beamlead connections is mounted as a bridge between the free access electrode of the capacitor and a groundconnected metallic stud fixed on the base, the diode bias voltage is supplied by means of a wire soldered on the cap, and the varactor bias voltage is supplied by means of a wire soldered on the free access electrode of the coupling capacitor.
Claim 3
Dependent Claim
34 words
A microwave oscillator according to claim 1 wherein, the waveguide being closed on one side by a short-circuit piston, the stud for fixing the varactor is located between the diode and the short-circuit piston.
Claim 4
Dependent Claim
31 words
A microwave oscillator according to claim 2, wherein the cap for closing the diode package is cut back on the side nearest the ground-connection stud which is fixed on the base.
Claim 5
Dependent Claim
53 words
A microwave oscillator according to claim 1, wherein the bias voltages of the diode and of the varactor are brought in the plane of the waveguide through two orifices pierced in two lateral walls of said waveguide, the dimensions of said orifices at cutoff being related to the operating frequency of the oscillator.
Claim 6
Dependent Claim
36 words
A microwave oscillator according to claim 4, wherein the lateral walls of the waveguide are traversed by a microstrip filter or capacitor on a substrate and wherein said capacitor closes-off the orifice in the waveguide wall.
Claim 7
Dependent Claim
34 words
A microwave oscillator according to claim 4, wherein a small volume of absorbent material placed between the waveguide and the varactor bias wire eliminates the second harmonic of the operating frequency of the oscillator.
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) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |