Circuit for synchronizing transmission local oscillating frequen

Details Circuit for synchronizing transmission local oscillating frequen Circuit for synchronizing transmission local oscillating frequen

1998-03-20

1999-11-09

Mis, David

Oscillators

Plural oscillators

Selectively connected to common output or oscillator...

331 2, 331 47, 331 55, 375260, 455 60, 455 675, 455 677, 455115, 455119, H03B 500, H03L 707

Patent

active

059822422

ABSTRACT:
A circuit for synchronizing transmission local oscillating frequency in a co-channel microwave system, with more reliability, synchronizes horizontal and vertical polarization waves phase locked dielectric resonators which generate transmission local oscillating frequencies in a digital co-channel microwave system. The circuit includes a first reference signal oscillator for outputting a first reference signal; a second reference signal oscillator for outputting a second reference signal; a first divider for dividing the power of the first reference signal and outputting first and second divided powers; a second divider for dividing the power of the second reference signal and outputting first and second divided powers; a first radio frequency signal generator for detecting the output level of the second divided second reference signal and for outputting one of the first divided first reference signal or the second divided second reference signal as a first radio frequency signal for input to the vertical polarization waves locked dielectric resonator, depending upon the detected result; and a second radio frequency signal generator for detecting the output level of the second divided first reference signal and for outputting one of the first divided second reference signal or the second divided first reference signal as a second radio frequency signal for input to the horizontal polarization waves locked dielectric resonator, depending upon the detected result; the first reference signal oscillator, the first divider, and the first radio frequency signal generator being included in one module and the second reference signal oscillator, the second divider, and the second radio frequency signal generator being included in another module.

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