Title :
Study of SAW pulse compression using 5×5 Barker codes with quadraphase IDT geometries
Author :
Edmonson, P.J. ; Campbell, C.K. ; Yuen, S.F.
Author_Institution :
Dept. of Electrotechnol., Mohawk Coll., Hamilton, Ont., Canada
Abstract :
A theoretical and experimental study of pulse expansion and compression is reported for a 100-MHz SAW (surface acoustic wave) quadraphase code generator with 1250 IDT (interdigital transducer) fingers on ST-quartz as derived from a combined 5×5 Barker sequence. Techniques are also examined for increasing the peak-to-sidelobe ratio of the compressed pulse, using a series SAW suppression filter whose IDT apodization is derived from the inverse spectral ripple factor of the combined Barker code
Keywords :
acoustic transducers; codes; encoding; surface acoustic wave devices; surface acoustic wave filters; 100 MHz; Barker codes; SAW pulse compression; SAW suppression filter; ST-quartz; interdigital transducer; inverse spectral ripple factor; pulse expansion; quadraphase IDT geometries; Autocorrelation; Discrete Fourier transforms; Filters; Frequency; Geometry; Niobium; Pulse compression methods; Surface acoustic waves; Transfer functions;
Conference_Titel :
Ultrasonics Symposium, 1988. Proceedings., IEEE 1988
Conference_Location :
Chicago, IL
DOI :
10.1109/ULTSYM.1988.49371
