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Author(s):
Weigel, Robert; Bader, Bernhard; Fischerauer, Gerhard; Russer, Peter 
Title:
Design and Performance of Wide-Band IIDT-Type SAW Filters with Low Loss and Improved Sidelobe Suppression 
Abstract:
Wideband low-loss surface-acoustic-wave (SAW) filters employing interdigitated interdigital transducers (IIDTs) suitable for cellular radio systems are presented. The filters were fabricated on 36 degrees Y-X LiTaOtextlesssubtextgreater3textless/subtextgreater substrates. The sidelobe suppression has been improved by withdrawal weighting techniques. A design method which optimizes the weighting functions and the number of fingers has been worked out. In the 500-MHz band, fractional bandwidths of...    »
 
Keywords:
1.8 dB, 500 MHz, cellular radio, cellular radio systems, design method, IIDT-type SAW filters, interdigitated interdigital transducers, LiTaOtextlesssubtextgreater3textless/subtextgreater substrates, LiTaO3 substrates, low loss, radiofrequency filters, sidelobe suppression, surface acoustic wave filters, surface-acoustic-wave, weighting functions, wideband type, withdrawal weighting techniques 
Book / Congress title:
IEEE MTT-S International Microwave Symposium 
Volume:
Publisher address:
Atlanta, GA, USA 
Year:
1993 
Month:
jun 
Pages:
1505--1508