USH646H
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wideband self mixing millimeter wave receiver
Assignee: United States Department of the Air Force
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Filing: 1987-05-07
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Granted: 1989-06-06
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Expires: 2007-05-07
Abstract
Abstract A self-mixing antenna-mixer millimeter wave receiver has the local oscillator and the mixer combined in one single unit, using a Gunn diode (or other device) placed at the center of a spiral antenna and proper voltage applied, so that the diode becomes an oscillator. At the same time the diode will function as a mixer for the input signals received by the spiral antenna. The IF frequency from the mixer can be amplified and detected for further processing. Only a dc power supply is required to feed the diode at the center of the antenna.
Inventors
- 👤 James B. Y. Tsui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:33
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/247; H01Q1/36
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
124 words
A self-mixing antenna-mixer millimeter wave receiver having a local oscillator and a mixer combined in a single unit, comprising a spiral antenna having two arms, each having an inner end and an outer end, a Gunn diode having two terminals connected directly to the inner ends of the two arms at the center of the spiral antenna, means for coupling a source of direct current to the two terminals of said diode via leads used only for the direct current and connected directly to the inner ends of the two arms at the center of the spiral antenna, so that the diode becomes an oscillator, and at the same time the diode functions as a mixer for input signals received by the spiral antenna.
Claim 2
Dependent Claim
124 words
A self-mixing antenna-mixer millimeter wave receiver having a local oscillator and a mixer combined in a single unit, comprising a spiral antenna having two arms, each having an inner end and an outer end, a Gunn diode having two terminals connected directly to the inner ends of the two arms at the center of the spiral antenna, means for coupling a source of direct current to the two terminals of said diode via leads used only for the direct current and connected directly to the inner ends of the two arms at the center of the spiral antenna, so that the diode becomes an oscillator, and at the same time the diode functions as a mixer for input signals received by the spiral antenna.
Claim 3
Dependent Claim
61 words
A receiver according to claim 1, wherein the outer end of one of the arms of the spiral antenna is connected to ground, and the outer end of the other arm is coupled to an IF amplifier, a detector, and a video amplifier in tandem, so that an IF frequency from the mixer can be amplified and detected for further processing.
Claim 4
Dependent Claim
122 words
A self-mixing antenna-mixer millimeter wave receiver having a local oscillator and a mixer combined in a single unit, comprising a spiral antenna having two arms, each having an inner end and an outer end, a semiconductor device having at least two terminals connected directly to the inner ends of the two arms at the center of the spiral antenna, means for coupling a source of direct current to said device via leads used only for the direct current and connected directly to the inner ends of the two arms at the center of the spiral antenna, so that the device becomes an oscillator, and at the same time the device functions as a mixer for input signals received by the spiral antenna.
Claim 5
Dependent Claim
122 words
A self-mixing antenna-mixer millimeter wave receiver having a local oscillator and a mixer combined in a single unit, comprising a spiral antenna having two arms, each having an inner end and an outer end, a semiconductor device having at least two terminals connected directly to the inner ends of the two arms at the center of the spiral antenna, means for coupling a source of direct current to said device via leads used only for the direct current and connected directly to the inner ends of the two arms at the center of the spiral antenna, so that the device becomes an oscillator, and at the same time the device functions as a mixer for input signals received by the spiral antenna.
Claim 6
Dependent Claim
14 words
A receiver according to claim 3, wherein said semiconductor device is a Gunn diode.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |