Microwave phase locked loops using FET frequency dividers

Details Microwave phase locked loops using FET frequency dividers Microwave phase locked loops using FET frequency dividers

1980-06-05

1982-04-27

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Transistorized controls

307225C, 331 25, 333218, H03L 708

Patent

active

043273360

ABSTRACT:
Disclosed is a microwave frequency generator for producing a microwave signal with high frequency accuracy, high spectral purity, low noise and high frequency stability. It is known to phase lock the fundamental microwave oscillator to a highly stable crystal oscillator at lower frequency and convert to a higher output frequency with a multiplier or harmonic generator but fm noise is also multiplied. The present invention avoids this problem by using MESFET frequency dividers to phase lock a microwave oscillator to a stable reference oscillator without the need for frequency multipliers. The MESFET frequency divider provides signal gain instead of loss during operation.

REFERENCES:
patent: 3393380 (1968-07-01), Webb et al.
patent: 3535651 (1970-10-01), Peterson
patent: 4152680 (1979-05-01), Harrison
patent: 4266208 (1981-05-01), Cornish
patent: 4297648 (1981-10-01), Tucker et al.

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