Browsing by Subject "Electronics -- Equipment and supplies"
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Item Statistical comparison of electromagnetic susceptibility of a transmission line in reverberation and semianechoic chambers(Texas Tech University, 1998-12) Xu, JiayuThis thesis included the detailed structure of a microwave reverberation chamber for EMC testing. A single transmission line in the chamber is illuminated by a distant EMI source to study the induced voltages on the load impedance at one end. The frequency-domain responses are obtained. The statistical characteristics of the reverberation chamber, probability distribution function (PDF) and cumulative distribution function (CDF), are studied both theoretically and experimentally. A computer simulation program "NULINE" is used to simulate the response of the same transmission line excitation in a semianechoic EMC testing chamber. The statistical properties of the semianechoic chamber are also studied. The goal of this thesis is to compare the electromagnetic susceptibility measurement results of the statistical properties of the two different kinds of chambers. Upon our investigation, some meaningful conclusions are reached to properly interpret the EMC testing results from a semianechoic chamber and a reverberation chamber. Experiments for further investigation are also suggested.Item The research and development of an air separation conveyor for obsolete electronic products recycling(Texas Tech University, 2003-05) Campbell, John SElectronics are a rapidly evolving industry with continuous development of new and progressive technology. The ceaseless flux of high-technology products into the marketplace is creating a serious environmental dilemma. Most electronic components contain a significant amount or material reources which have the potential to be recovered but instead are stored indefinitely or are dumped in landfills. Research and development in the electronics recycling industry must keep pace with electronics manufacturers if we are to avert a major environmental crisis. In this thesis, a new separation process was developed and a prototype unit constructed. The machine described in this paper illustrates yet another method of material separation in the electronics recycling industry. Continued research and development in recycling technology is essential to ensure that the very electronics we seek today are not the same ones which bring on the environmental demise of tomorrow.