Title :
Optimization of inner structure of fan-shaped SAW transducers
Author :
Bausk, Evgeniy V.
Author_Institution :
Inst. of Semicond. Phys., Novosibirsk, Russia
Abstract :
An optimization procedure is proposed for improving selectivity of fan-shaped interdigital transducers (FIDT) weighted by assignment of polarities of individual electrodes. At the first stage, weighting functions for input and output FIDTs are chosen, according to which initial electrode structures are formed. At the main stage a more precise tuning of electrode polarity arrangement is performed to meet filter frequency response specifications in the best way. SAW filters with bandwidth of 2-50% and out-of-band rejection of 47-60 dB have been designed with using the described algorithm
Keywords :
circuit optimisation; electrodes; frequency response; interdigital transducers; surface acoustic wave filters; surface acoustic wave transducers; 47 to 60 dB; 47-60 dB out-of-band rejection; SAW filters; assignment of polarities; electrode polarity; fan-shaped SAW transducers; filter frequency response specifications; initial electrode structures; inner structure; interdigital transducers; optimization; selectivity; tuning; weighting functions; Algorithm design and analysis; Band pass filters; Bandwidth; Electrodes; Frequency response; Physics; SAW filters; Surface acoustic waves; Transducers; Tuning;
Conference_Titel :
Frequency Control Symposium and Exhibition, 2000. Proceedings of the 2000 IEEE/EIA International
Conference_Location :
Kansas City, MO
Print_ISBN :
0-7803-5838-4
DOI :
10.1109/FREQ.2000.887372
