Title :
Interior perturbation based approach for reflection of surface acoustic waves at a strip or a groove for applications in pulse compression radars
Author :
Jeoti, Varun ; Sharma, P.C.
Author_Institution :
E&E Eng., Universiti Teknologi Petronas, Tronoh, Malaysia
Abstract :
Large time-bandwidth (TB) product surface acoustic wave (SAW) pulse compression filters are routinely designed and fabricated using reflective array compressors (RAC). The reflection mechanism on these RAC is well understood though it is numerically cumbersome. Analytical methods are also fraught with difficulties. A simple semi-analytical method is described herein that seeks to explain the reflection mechanism with simple formulas for both reflections from grooves and as well as from strips. The method seeks to model the grooves and strips as an interior perturbation to the medium rather than surface perturbation. The resulting formula yields values of reflection coefficients that match well with those in literature.
Keywords :
FM radar; acoustic wave reflection; electromagnetic wave reflection; matched filters; perturbation techniques; pulse compression; radar theory; surface acoustic wave filters; SAW filters; grooves; interior perturbation; large time-bandwidth product; pulse compression filters; pulse compression radar; reflection coefficients; reflection mechanism; reflective array compressors; semi-analytical method; strips; surface acoustic waves; Acoustic arrays; Acoustic reflection; Acoustic waves; Boundary conditions; Filters; Frequency modulation; Pulse compression methods; Radar applications; Strips; Surface acoustic waves;
Conference_Titel :
RF and Microwave Conference, 2004. RFM 2004. Proceedings
Print_ISBN :
0-7803-8671-X
DOI :
10.1109/RFM.2004.1411072