Coding Techniques Using Linear SAW Transducers

Enhanced Sensitivity of a Surface Acoustic Wave Gyroscope

“…11) The P-matrix for the right side of the device that includes the output IDT (P TR ), the spacing between the IDT and the second reflector (P SR ), and the second reflector (P RR ), is also cascaded as P RIDT . Therefore, the admittance matrix for the whole device can be expressed by Using the admittance matrix solution, the frequency response S 12 can be deduced using 12)…”

“…Thus, in our resonator design, the spacing was set to 5 x =8. 12) Other parameters affecting device performance are as follows: (1) number of IDT fingers N idt , (2) acoustic aperture W, (3) number of electrodes in the shorted grating reflector, N ref , and (4) the spacing between the IDTs, L idt . Figure 5 shows the L ri dependence of the frequency response of the resonator in the case of 128 YX LiNbO 3 , an N idt of 5, a W of 40 x , an L idt of 40 x , and an N ref of 450.…”

“…To obtain a single steep resonance peak in the middle of the reflector stopband, an L ri of 5 x =8 was chosen in the design, which qualitatively agrees with the other reported values. 12) Moreover, to investigate the effect of the design parameters on the performance of the SAW resonator, the two-port SAW resonator with various structures and parameters was simulated by COM, as shown in Fig. 6, in which 128 YX eration should be made in the determination of L idt .…”