Patent US4004255A successfully refreshed from Google Patents.
US4004255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave frequency phase modulator
Assignee: Alcatel CIT SA
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Filing: 1975-07-02
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Granted: 1977-01-18
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Expires: 1995-07-02
Abstract
Abstract Phase modulator enabling the ratio of parasitic waves to be reduced and the precision on the phase shift to be increased, comprising two microwave frequency diodes connected to voltage supplies such that the diodes are each rendered conductive or blocked in phase opposition with one another, the two diodes being respectively arranged in two paths having different electrical lengths for ensuring the phase shift, and two or four circulators enabling the main waves to issue at the output of the modulator and the parasitic waves to be dissipated in matching loads.
Inventors
- 👤 Roland Chapnikoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:48
CPC Classifications
H; H03; H03C; H03C7/00; H03C7/02; H03C7/025; H03C7/027
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
A microwave phase modulator comprising first and second three-access circulators, the first accesses of the first and second circulators serving, respectively, as the input and the output access of the modulator, the second accesses being connected to one another by way of a first path having a first diode arranged therein and the third accesses being connected to one another by way of a second path having a second diode arranged therein, the two paths being of different electrical length and the two diodes being connected to voltage supplies such that they are each rendered conductive or blocked in phase opposition with each other.
Claim 2
Dependent Claim
104 words
A microwave phase modulator comprising first and second three-access circulators, the first accesses of the first and second circulators serving, respectively, as the input and the output access of the modulator, the second accesses being connected to one another by way of a first path having a first diode arranged therein and the third accesses being connected to one another by way of a second path having a second diode arranged therein, the two paths being of different electrical length and the two diodes being connected to voltage supplies such that they are each rendered conductive or blocked in phase opposition with each other.
Claim 3
Dependent Claim
40 words
A modulator as claimed in claim 1, in which each path includes a respective further circulator comprising three accesses, of which one access is terminated in a matching load and the other two accesses are connected in each said path.
Claim 4
Dependent Claim
17 words
A modulator as claimed in claim 1, in which the second path includes a differential phase shifter.
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) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |