Title :
Correction factor for low-loss 180 degrees reflecting linear chirp arrays in SAW devices
Author :
Huang, Frederick
Author_Institution :
Dept. of Eng. Sci., Oxford Univ., UK
Abstract :
Low-loss, 180 degrees -reflecting linear chirps with constant or slowly varying weighting and large time-bandwidth product are analyzed. Multiple reflections are fully taken into account, giving a universal correction factor as a function of array parameters. This should enable such chirps to be designed without making iterations. Surface acoustic-wave (SAW) device layouts making use of the 180 degrees arrays are suggested.<>
Keywords :
acoustic arrays; surface acoustic wave devices; SAW devices; linear chirp arrays; time-bandwidth product; universal correction factor; Acoustic arrays; Acoustic reflection; Acoustic waves; Chirp; Equations; Frequency; Phased arrays; Surface acoustic wave devices; Surface acoustic waves; Transducers;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
