Antenna with electrically variable reflector
Abstract
Abstract 1. A RADIO FREQUENCY ANTENNA SYSTEM COMPRISING A REFLECTOR ASSEMBLY, A FEED ELEMENT DIRECTED TOWARD THE CENTER OF SAID ASSEMBLY AND SPACED THEREFROM A DISTANCE BETWEEN APPROXIMATELY ONE-HALF AND ONE-QUARTER THE MAXIMUM DIMENSION OF SAID ASSEMBLY, A RADIO FREQUENCY TRANSMISSION LINE CONNECTED TO SAID FEED ELEMENT AND ADAPTED TO THE CONNECTED TO ANTENNA UTILIZATION APPARATUS, SAID ASSEMBLY COMPRISING A PLURALITY OF ELEMENTAL REFLECTOR UNITS EACH HAVING A RECTANGULAR HORN ANTENNA, AN ELECTRICALLY CONTROLLABLE PHASE CONTROL ELEMENT CONNECTED TO SAID HORN ANTENNA BY WAVEGUIDE TRANSMISSION LINE TO MODIFY A SIGNAL RECEIVED BY SAID HORN ANTENNA, AND SIGNAL REFELECTING MEANS CONNECTED TO RECEIVE THE MODIFIED SIGNAL FROM SAID HORN ANTENNA AND PASE CONTROL ELEMENT AND RETURN IT FOR TRANSMISSION FROM SAID HORN ANTENNA, AND MEANS FOR TRANSMITTING A SET OF CONTROL SIGNALS TO THE RESPECTIE PHASE CONTROL ELEMENTS TO PROVIDE PREDETERMINED PHASE SHIFTS OF RESPECTIVE PORTIONS OF THE WAVE FRONT IMPINGING ON SAID REFLECTOR ASSEMBLY.
Inventors
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Bibliographic Details
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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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |