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Author(s):
Fischerauer, Gerhard; Bader, Bernhard; Russer, Peter; Weigel, Robert 
Title:
Design of Mobile Phone IIDT-Type SAW Filters with Block-Like Distribution of Transducers 
Abstract:
Wide band low-loss SAW filters employing interdigitated interdigital transducers (IIDT's) and suitable for cellular radio applications are presented. After an investigation of the many design parameters that have to be taken into account, a new block-like distribution of transducers within the IIDT structure is studied in detail. This distribution leads to almost identical impedances at the filter input and output. An automatic optimization algorithm is also described. In particular, the finger...    »
 
Keywords:
1.8 dB, 500 MHz, band-pass filters, block-like distribution, cellular radio, cellular radio applications, center frequency, filter input, filter output, finger numbers, fractional bandwidths, insertion loss, interdigitated interdigital transducers, LiTaO3, mobile phone IIDT-type SAW filters, passband ripples, radiofrequency filters, stopband rejection, surface acoustic wave devices, surface acoustic wave filters, withdrawal weighting functions 
Journal title:
IEEE Transactions on Microwave Theory and Techniques 
Year:
1994 
Journal volume:
42 
Month:
jul 
Journal issue:
Pages contribution:
1380--1386