Design & Simulation of Surface Acoustic Wave (SAW) Filter at 70MHz for Digital Data Transmission

Abstract

The Surface Acoustic Wave(SAW) filter has found wide applications in digital communication due to its linear phase response. The important parameters to design SAW filter are number of fingers, spacing between fingers, their shapes. The SAW filter at 70MHz center frequency having bandwidth of 15% will be designed by using 2-IDT structure. The piezoelectric substrate will be used. The proposed filter will show the insertion loss of 2.5 to 3.5dB . The simulation results will be measured using CST microwave studio .By using remez algorithm in MATLAB frequency response is calculated.