Dual frequency band,polarization diverse tracking feed system for a horn antenna
Abstract
Abstract THE APPARATUS OF THE PRESENT INVENTION CONSTITUTES A FEED TO A SINGLE HORN-TYPE ANTENNA PROVIDING ONE FREQUENCY AND FOR COMMUNICATIONS AND MONOPULSE TRACKING AND A HIGHER FREQUENCY BAND FOR HIGH POWER TRANSMITTING MORE PARTICULARLY, THE HIGHER FREQUENCY BAND IS OF THE ORDER OF 50-100 PERCENT HIGHER THAN THE FREQUENCY BAND FOR THE RECEIVE AND TRACKING FREQUENCIES. IN THIS LATTER FREQUENCY BAND, THE ANTENNA IS CAPABLE OF RECEIVING COMMUNICATIONS AND HAVING MONOPULSE TRACKING CAPABILITY WITH POLARIZATION DIVERSITY, I.E., OTHOGONAL LINEAR, ORTHOGONAL CIRCULAR, ROTATABLE LINEAR OR ARBITRARY ELLIPTICAL POLARIZATIONS. CROSS-POLARIZATION OF ALL PATTERNS IS VERY LOW AND CROSS-TALK BETWEEN AZIMUTH AND ELEVATION TRACKING CHANNELS IS SUBSTANTIALLY ZERO. ALSO, HIGH EFFICIENCY TRACKING CAN BE ACHIEVED OVER A BROAD FREQUENCY RANGE WITHOUT RETUNING OF COMPONENTS SUCH AS COUPLERS OR FILTERS.
Inventors
- 👤 James S Ajioka
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |