Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1974-11-15
1976-08-10
Wilbur, Maynard R.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
G01S 130
Patent
active
039745023
ABSTRACT:
In a phase comparison radio navigation system in which spaced transmitters radiate phase-locked signals in a time-shared sequence, in order to enable a receiver to be operated on any selected one of a large number of different frequencies, a phase memory in the receiver for giving a continuous output representative of the phase of an intermittently received signal, comprises a controlled oscillator giving an output of a frequency much higher than the received frequency, a frequency divider providing a first sub-multiple of the oscillator frequency, a frequency synthesizer providing a heterodyne signal at a second sub-multiple and a phase comparator providing an output controlling the oscillator in accordance with the phase relation between the divider output and the output of a mixer mixing the received signal with a heterodyne signal.
REFERENCES:
patent: 3705403 (1972-12-01), Hughes
patent: 3852751 (1974-12-01), Wood et al.
Berger Richard E.
Connors Edward F.
Decca Limited
Wilbur Maynard R.
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