Resonance behavior of the sensitivity of acoustic-wave chemical gas sensors

Thin-film piezoelectric acoustic sensor (TFPAS): further experimental validation of the theory of resonance sensitivity

“…The experimental setup included a gas testing cell, a gas delivery system, and vapor generating cell all of which were described earlier in detail [10,11], read-out electronics, and data acquisition hardware/software. For the latter a laboratory made high-frequency, 100-120 MHz, amplifier of routine design was used.…”

“…TFPAS operation principles and the theory of its resonance-like response were introduced in [10,11]. This theory resulted from the application of continuous acoustic wave (CW) analysis of TFPAS sensitivity mechanism.…”

“…Recently, it was shown theoretically that the sensitivity of TFPAS can be further substantially increased (two orders of magnitude and more) by the proper choice of the working frequency, resonator geometry, the acoustic parameters of the resonator elements such as density and sound velocity [10][11].…”