US3243731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave single sideband modulator
Assignee: GTE Sylvania Inc
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Filing: 1962-06-18
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Granted: 1966-03-29
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Expires: 1982-06-18
Abstract
No abstract record available.
Inventors
- 👤 Jon W Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:37
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/52; H03C1/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
333 words
A SINGLE SIDEBAND SUPPRESSED CARRIER MODULATOR COMPRISING, IN COMBINATION, FIRST AND SECOND BALANCED MODULATORS EACH INCLUDING A HYBRID COUPLER HAVING FIRST AND SECOND INPUT PORTS AND FIRST AND SECOND OUTPUTS PORTS, THE FIRST INPUT PORT OF EACH OF SAID COUPLERS HAVING IN SERIES THEREWITH A CONDUCTOR OF LENGTH EQUAL TO AN ODD MULTIPLE OF A QUARTER WAVELENGTH AT THE FREQUENCY OF THE CARRIER, AND A VARACTOR CONNECTED TO EACH OF SAID FIRST AND SECOND INPUT PORTS; MEANS FOR APPLYING A MODULATION SIGNAL OF REFERENCE PHASE TO BOTH VARACTORS OF SAID FIRST BALANCED MODULATOR, MEANS FOR APPLYING SAID MODULATION SIGNAL, SHIFTED 90* RELATIVE TO SAID REFERENCE PHASE, TO BOTH VARACTORS OF SAID SECOND BALANCED MODULATOR; A THIRD HYBRID COUPLER HAVING TWO INPUT PORTS AND TWO OUTPUT PORTS, MEANS CONNECTING SAID FIRST OUTPUT PORT OF THE COUPLER IN SAID FIRST BALANCED MODULATOR TO ONE OUTPUT PORT OF SAID THIRD COUPLER, MEANS CONNECTING SAID FIRST OUTPUT PORT OF THE COUPLER IN SAID SECOND BALANCED MODULATOR TO THE OTHER OUTPUT PORT OF SAID THIRD COUPLER, MEANS FOR APPLYING A CARRIER SIGNAL TO ONE OF THE INPUT PORTS OF SAID THIRD COUPLER, AND A LOADING MEANS CONNECTED TO THE OTHER INPUT PORT OF SAID THIRD COUPLER, SAID THIRD COUPLER BEING OPERATIVE TO COUPLE SAID CARRIER AT A REFERENCE PHASE TO SAID FIRST BALANCED MODULATOR AND AT QUADRATURE PHASE TO SAID SECOND BALANCED MODULATOR; A FOURTH HYBRID COUPLER HAVING FIRST AND SECOND INPUT PORTS AND FIRST AND SECOND OUTPUT PORTS; AND CONNECTIONS OF EQUAL ELECTRICAL LENGTH BETWEEN THE SECOND OUTPUT PORTS OF THE COUPLERS IN SAID FIRST AND SECOND BALANCED MODULATORS TO THE FIRST AND SECOND INPUTS PORTS OF SAID FOURTH COUPLER, RESPECTIVELY, THE FIRST INPUT PORT OF SAID FOURTH COUPLER HAVING IN SERIES THEREWITH A CONDUCTOR OF LENGTH EQUAL TO A QUARTER WAVELENGTH AT THE FREQUENCY OF THE CARRIER, SAID FOURTH COUPLER BEING OPERATIVE TO COMBINE THE SIGNALS FROM SAID FIRST AND SECOND MODULATORS TO PRODUCE UPPER AND LOWER SIDEBANDS AT SAID FIRST AND SECOND OUTPUT PORTS, RESPECTIVELY.
Claim 2
Dependent Claim
333 words
A SINGLE SIDEBAND SUPPRESSED CARRIER MODULATOR COMPRISING, IN COMBINATION, FIRST AND SECOND BALANCED MODULATORS EACH INCLUDING A HYBRID COUPLER HAVING FIRST AND SECOND INPUT PORTS AND FIRST AND SECOND OUTPUTS PORTS, THE FIRST INPUT PORT OF EACH OF SAID COUPLERS HAVING IN SERIES THEREWITH A CONDUCTOR OF LENGTH EQUAL TO AN ODD MULTIPLE OF A QUARTER WAVELENGTH AT THE FREQUENCY OF THE CARRIER, AND A VARACTOR CONNECTED TO EACH OF SAID FIRST AND SECOND INPUT PORTS; MEANS FOR APPLYING A MODULATION SIGNAL OF REFERENCE PHASE TO BOTH VARACTORS OF SAID FIRST BALANCED MODULATOR, MEANS FOR APPLYING SAID MODULATION SIGNAL, SHIFTED 90* RELATIVE TO SAID REFERENCE PHASE, TO BOTH VARACTORS OF SAID SECOND BALANCED MODULATOR; A THIRD HYBRID COUPLER HAVING TWO INPUT PORTS AND TWO OUTPUT PORTS, MEANS CONNECTING SAID FIRST OUTPUT PORT OF THE COUPLER IN SAID FIRST BALANCED MODULATOR TO ONE OUTPUT PORT OF SAID THIRD COUPLER, MEANS CONNECTING SAID FIRST OUTPUT PORT OF THE COUPLER IN SAID SECOND BALANCED MODULATOR TO THE OTHER OUTPUT PORT OF SAID THIRD COUPLER, MEANS FOR APPLYING A CARRIER SIGNAL TO ONE OF THE INPUT PORTS OF SAID THIRD COUPLER, AND A LOADING MEANS CONNECTED TO THE OTHER INPUT PORT OF SAID THIRD COUPLER, SAID THIRD COUPLER BEING OPERATIVE TO COUPLE SAID CARRIER AT A REFERENCE PHASE TO SAID FIRST BALANCED MODULATOR AND AT QUADRATURE PHASE TO SAID SECOND BALANCED MODULATOR; A FOURTH HYBRID COUPLER HAVING FIRST AND SECOND INPUT PORTS AND FIRST AND SECOND OUTPUT PORTS; AND CONNECTIONS OF EQUAL ELECTRICAL LENGTH BETWEEN THE SECOND OUTPUT PORTS OF THE COUPLERS IN SAID FIRST AND SECOND BALANCED MODULATORS TO THE FIRST AND SECOND INPUTS PORTS OF SAID FOURTH COUPLER, RESPECTIVELY, THE FIRST INPUT PORT OF SAID FOURTH COUPLER HAVING IN SERIES THEREWITH A CONDUCTOR OF LENGTH EQUAL TO A QUARTER WAVELENGTH AT THE FREQUENCY OF THE CARRIER, SAID FOURTH COUPLER BEING OPERATIVE TO COMBINE THE SIGNALS FROM SAID FIRST AND SECOND MODULATORS TO PRODUCE UPPER AND LOWER SIDEBANDS AT SAID FIRST AND SECOND OUTPUT PORTS, RESPECTIVELY.
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |