SAW Filter Performance Improvement

Surface acoustic wave (SAW) filters have a wide range of applications, including, for example, in mobile/wireless transceivers, radio frequency (RF) filters, intermediate frequency (IF) filters, resonator-filters, filters for mobile and wireless circuits, IF filters in a base transceiver station (BTS), RF front-end filters for mobile/wireless circuitry, multimode frequency agile oscillators for spread-spectrum secure communications, nyquist filters for microwave digital radio, voltage controlled oscillators for first or second stage mixing in mobile transceivers, delay lines for low power time-diversity wireless receivers, pseudo-noise-coded delay lines for combined code division multiple access/time division multiple access (CDMA/TDMA) access, clock recovery filters for fiber-optics communication repeater stages, synchronous, spread-spectrum communications, televisions, video recorders, and many other applications. SAW filters are also finding increasing use as picture-signal intermediate frequency (PIF) filters, vestigial sideband (VSB) filters, and other types of communication filters, and as filters for digital signal processing. It is, however, supported and lead by various technologies of public communication systems such as fiber optics, digital microwave and satellites. Various custom SAW devices for public communication systems have been already widely used and still progress.
This paper describes various methods to minimize some of the distortions in SAW filter. It includes bulk wave distortion and feed through distortion.