[2] [2] LI Zijing, CAO Liangzu, DENG Di, et al. The piezoelectric transducer electrically-tuned seventh order bandpass filter［J］. Piezoelectrics & Acoustooptics, 2021, 43(5):600-604.

[4] [4] HUANG H, PARAMO D. Broadband electrical impedance matching for piezoelectric ultrasound transducers［J］. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2011, 58(12):2699-2707.

[5] [5] JANU。P, BAJER J, DYCKA P, et al. Precise experimental determination of electrical equivalent circuit parameters for ultrasonic piezoelectric ceramic transducers from their measured characteristics［J］. Ultrasonics, 2021, 112:106341-106345.

[6] [6] LIU Xiaoyan, LU Yanfeng. Characteristic analysis and parameter measurement of ceramic resonator［J］. Experimental Technology and Management,2016,33(4):46-49.

[7] [7] KATO T, IMAA I. Measurements of equivalent circuit parameters of piezoelectric ceramic resonators［J］. Japanese Journal of Applied Physics, 1987,26(Suppl.2):191-194.

[8] [8] KIM J S, CHO I K, YU I. A new method of determining the equivalent circuit parameters of piezoelectric resonators and analysis of the piezoelectric loading effect［J］. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 1993,40(4):424-426.

[9] [9] DIESTE M I, VICENTE J. Measurement and thermal modeling of high-Q piezoelectric resonators［J］. ISA Transactions，2000，39：371-377.

[10] [10] GAO Longqing. Research and implement on test method of multi-parameter of ceramic component［J］. Instrument Technique and Sensor, 2008(11)：81-83.

[11] [11] YU Zhenhuan, LI Dong, WANG Yanlin. Research of test and sort system for crystal resonator［J］. Computer Measurement ＆ Control, 2011，19(6)：1284-1286.

[12] [12] WANG Xiaoyan，LI Dong，WANG Yanlin. Design of two channel phase discriminator applied to quartz crystal test［J］. Modern Electronics Technique, 2015，38(6)：133-135.

[14] [14] LI Guili, WANG Yanlin, LI Dong. Design of the electrical parameters measurement circuit of quartz crystal［J］. Journal of Beijing Institute of Machinery, 2008, 23(1):24-27

[16] [16] POZAR D M. Microwave engineering［M］. 3rd Edition. New York: John Wiley & Sons Inc, 2005.

[17] [17] PAGANELLIA R P, ROMANIB A, GOLFARELL A I, et al. Modeling and characterization of piezoelectric transducers by means of scattering parameters. Part I: Theory［J］. Sensors and Actuators A: Physical,2010,160: 9-18.