摘要: Abstract This paper is a tutorial review of the theory simple thickness mode piezoelectric transducer. The usual differential equations and constitutive relations are used to obtain general impedance for transducer with arbitrary boundary conditions. In derivations, special attention given showing what basic assumptions made, which material constants must be in equations. As usual, only valid if no quantities depend on lateral co-ordinates plate. It shown that certain elastic zero plate coordinate system Four geometrical variables, three conditions, completely determine transfer properties Exact expressions electrical resonator free surfaces, bonded backed (namely, at low frequency, loss halfwave frequency). 3.3 dB an unbacked, untuned, acoustically-matched series resistance coupling factor 0.5.
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