Patent US3739301A successfully refreshed from Google Patents.
US3739301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single diode single sideband modulator
Assignee: United States Department of the Army
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Filing: 1971-06-30
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Granted: 1973-06-12
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Expires: 1991-06-30
Abstract
Abstract A transmission line feeds a PIN diode with an information signal. A modulating signal biases the diode so as to switch the diode between forward and reverse bias at an r.f. frequency. The PIN diode exhibits variable capacitance during switching which results in the generation, on the transmission line, of a single sideband modulated signal.
Inventors
- 👤 R Garver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:31
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/52; H03C1/60; H03C7/00; H03C7/02; H03C7/025; H03C7/027
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
146 words
A single sideband modulator comprising a single PIN diode means having at least two junctions, means for driving the single diode means through a blocking capacitor with a carrier signal, means for simultaneously biasing the single diode means through an inductor with a modulation signal, said modulation signal having a frequency of at least 30 megahertz for varying the resistance of the single PIN diode means during switching of the diode means bias to build up hole carriers, wherein said secondnamed means and said third-named means combine said carrier signal and said modulation signal to provide, within said single diode means, a lower sideband signal and an upper sideband signal and a relative conversion loss of 20-40 decibels therein between, means connected to the single diode means for extracting a single sideband modulation signal, and wherein said diode means consists entirely of a single PIN diode.
Claim 2
Dependent Claim
146 words
A single sideband modulator comprising a single PIN diode means having at least two junctions, means for driving the single diode means through a blocking capacitor with a carrier signal, means for simultaneously biasing the single diode means through an inductor with a modulation signal, said modulation signal having a frequency of at least 30 megahertz for varying the resistance of the single PIN diode means during switching of the diode means bias to build up hole carriers, wherein said secondnamed means and said third-named means combine said carrier signal and said modulation signal to provide, within said single diode means, a lower sideband signal and an upper sideband signal and a relative conversion loss of 20-40 decibels therein between, means connected to the single diode means for extracting a single sideband modulation signal, and wherein said diode means consists entirely of a single PIN diode.
Claim 3
Dependent Claim
16 words
The circuitry set forth in claim 1 wherein the diode is characterized as a PIN diode.
Claim 4
Dependent Claim
43 words
The circuitry defined in claim 2 wherein the modulation signal switches the biasing of the diode in a manner causing the diode to exhibit a capacitive impedance characteristic imposing rapid roll-off of an undesired sideband so as to generate a single sideband signal.
Claim 5
Dependent Claim
31 words
The subject matter set forth in claim 1 wherein the means for driving the diode with an information signal is a transmission line connected to an input-output arm of a circulator.
Claim 6
Dependent Claim
38 words
The circuitry defined in claim 1 wherein the means for biasing the diode with a modulation signal comprises a signal lead connected to a terminal of the diode, a second terminal of the diode being connected to ground.
Claim 7
Dependent Claim
29 words
The subject matter set forth in claim 4 wherein the circulator is also provided with a normal input arm for allowing entry of the information signal to the circulator.
Claim 8
Dependent Claim
31 words
The structure of claim 6 wherein the means connected to the diode for extracting a single sideband modulation signal from the diode is characterized as an output arm of the circulator.
Claim 9
Dependent Claim
105 words
The circuitry defined in claim 3 wherein the means for driving the diode with an information signal comprises a transmission line connected to an input-output arm of a circulator, the means for biasing the diode with a modulation signal being a signal lead connected to a terminal of the diode, a second terminal of the diode being connected to ground, the circulator being also provided with a normal input arm for allowing entry of the information signal to the circulator, the means connected to the diode for extracting a single sideband modulation signal from the diode being characterized as an output arm of the circulator.
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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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |