Surface Acoustic Wave Devices

acoustic waves admittance amplitude apodized IDT array factor assume bandwidth beam Calculate capacitance center frequency Chapter characteristic charge circuit coefficient components compressional conductance Consider constant coupled defined delay depends derivation described determined devices direction discussed distribution effects electric field electrodes equal equations equivalent Example expect fields Figure filter Fourier transform frequency response function given gives Hence impedance impulse response incident induced input interdigital transducer layer length loss material matrix negative Note obtained output particle passband periodic phase piezoelectric plane positive potential produces propagation receiver reflection reflectors requires resonator response function result sampling shift shown in Fig shows signal simple solid Solution spacing strain stress strips substrate surface wave Table track transducer transfer transmission line usually velocity voltage width