Retransmitting system for use in locating remote signals
Abstract
Abstract Non-distorting retransmission of the navigational signals from the object to be located to a remote signal-processing station, with apparatus comprising an antenna located at the object to initially receive the navigational signals; a linear radio frequency amplifier connected to the antenna to amplify the received signals; a source of radio frequency signals at a telemetry frequency; a controllable gain amplifier connected to receive the telemetry frequency signals; a differential amplifier having its output connected to the gain control terminal of the controllable gain amplifier and having its inputs respectively responsive to the outputs of the other two amplifiers to effectively compare their outputs and provide a voltage at the gain control terminal in accordance with any difference therebetween, whereby the telemetry frequency signals are modulated in accordance with the received navigational signals; a transmitting antenna connected to transmit the modulated signals to the processing station; and a converter at the processing station to convert the modulated signals to the frequency band of the original navigational signals.
Inventors
- 👤 Hoyt C Hottel Jr
Bibliographic Details
Claims Analysis
Total Claims: 4References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |