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

Volume

37

Issue

3

fYear

1990

fDate

5/1/1990 12:00:00 AM

Firstpage

277

Lastpage

278

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;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.55319

Filename

55319