Abstract
Wavelet reconstruction processors (WRPs) using surface acoustic wave (SAW) devices are a simple and efficient implementation of inverse wavelet transform technology in practical industrial applications. To assure the accuracy of the device fabrication, this article proposed a new model of WRPs based on the channel division approach and the two-port electrical network after investigating the Delta-Function Model (DFM) of interdigital transducers (IDTs), which can easily analyze the bandwidth, the admittance matrix, transfer function and insertion loss for an IDTs and a WRPs. Furthermore, to validate the simulation effect, some samples of WRPs were successfully manufactured with ST-X quartz as the piezoelectric substrate and Al thin film as the IDTs material, the center frequency and the scale are 49.0 MHz and <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$2^{-{2}}$ </tex-math></inline-formula> , respectively. A comparison of the experimental and simulation results reveals that the model possesses high accuracy with the relative error operating frequency of 0.204%, the relative error in insertion loss less than 1.17% at the operating frequency. This work provides an effective model for WRPs with higher precision, low consumption, high operation speed, making it possible for the acceleration of the development process of the WRPs for large-scale application and commercial promotion.
Published Version
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