Study of Electrostatic Discharge Durability for Surface Acoustic Wave Module

概要

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The electrostatic discharge (ESD) characteristics of surface acoustic wave (SAW) antenna duplexer modules are studied. We have researched the main spectrum of ESD at first. Using the result showing that the main ESD response has a 200 to 250 MHz spectrum, three new techniques for an improved circuit and one new technique for an improved SAW package are developed to achieve the desired ESD durability in this study. A high-pass filter (Q) circuit is proposed in order to suppress the 200 to 250 MHz spectrum. A large capacitance voltage control (Cv) circuit is proposed for suppressing the minus pulse ESD signal. A low impedance transmitter (Tx) port circuit (L) near 200 to 250 MHz is proposed for suppressing the plus pulse ESD signal. A high-pressure-sealing SAW package is proposed to improve SAW device ESD durability. The obtained circuits and methods are applied to an extended global system for mobile communication/digital cellular system/personal communication system (EGSM/DCS/PCS) triple-band SAW antenna duplexer modules. A sufficiently high ESD durability is obtained consequently.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2005-06-15