Title :
Design of a phase-locked multimode SAW oscillator
Author :
Bailey, C.G. ; Campbell, C.K.
Author_Institution :
Microwave Acoust. Lab., McMaster Univ., Hamilton, Ont., Canada
fDate :
5/1/1990 12:00:00 AM
Abstract :
A 60-100 MHz multimode SAW (surface acoustic wave) oscillator with comb spacing Delta f=10 MHz used a low-loss SPUDT (single-phase unidirectional transducer) comb filter in conjunction with two varactor-based control elements and two feedback loops, for mode selection and stability enhancement over long dwell times. The end aim is to reduce close-in phase noise over that of the unlocked oscillator, corresponding to improved intermediate-term time-domain stability. Frequency deviation was less than 20 Hz over two hours in each of the five comb modes.<>
Keywords :
surface acoustic wave devices; ultrasonic transducers; variable-frequency oscillators; 60 to 100 MHz; SPUDT; close-in phase noise; comb spacing; dwell times; feedback loops; intermediate-term time-domain stability; mode selection; phase-locked multimode SAW oscillator; single-phase unidirectional transducer; stability enhancement; varactor-based control elements; Acoustic transducers; Acoustic waves; Feedback loop; Filters; Frequency; Oscillators; Phase noise; Stability; Surface acoustic waves; Time domain analysis;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
