RADIO RANGING DEVICES
An apparatus is described which senses the location of a vehicle with respect to another body and initiates a control signal at a predetermined distance from the body. A superregenerative oscillator circuit is arranged to have alternate transmitting and sensing phases of operation, controlled by a modulator which generates two unidirectional pulses adjustably spaced in time. The oscillator energy is transmitted to an antenna and the echo energy is sampled by the oscillator during its receiving phase producing a control signal when the echo energy is returned at the time the oscillator is in the receiving phase. A rectifier is coupled to the super-regenerative circuit through a gate circuit, and means is provided for opening the gate circuit during the time the oscillator circuit is in the transmitting phase of operation. The rectifier therefore passes a unidirectional signal in response only to the sensing phases of operation.
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-013139
- Assignee:
- DTIE; NSA-15-013139
- Patent Number(s):
- US 2975414
- OSTI ID:
- 4068320
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- United States
- Language:
- English
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