Title :
Mode selection in a multimode SAW oscillator using FM chirp mixing signal injection
Author :
Saw, C.B. ; Smith, P.M. ; Edmonson, P.J. ; Campbell, C.K.
Author_Institution :
Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, Ont., Canada
fDate :
5/1/1988 12:00:00 AM
Abstract :
Mode-selection control of a multimode surface-acoustic-wave (SAW) oscillator has been obtained using SAW linear FM chirp signal injection. The prototype 60-100-MHz SAW oscillator design employed a single-phase unidirectional transducer (SPUDT) low-loss comb filter in the feedback loop, with minimum insertion loss of approximately=3.7 dB. Mode selection was achieved using an injection signal derived from the mixed output of two 27.5-52.5-MHz up- and down-chirp SAW filters. Mode switching times of >
Keywords :
surface acoustic wave devices; variable-frequency oscillators; 60 to 100 MHz; FM chirp mixing signal injection; SPUDT; feedback loop; frequency-agile radars; hopping; insertion loss; low-loss comb filter; mode selection; multimode SAW oscillator; single-phase unidirectional transducer; Chirp; Feedback loop; Frequency; Insertion loss; Local oscillators; Prototypes; Radar; SAW filters; Surface acoustic waves; Transducers;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
