Research On Propagation Characteristic Of TEM Wave And Test System Of GTEM Cell

This paper firstly discusses the study background and the development condition of GTEM cell, and the applications in EMC testing of GTEM cell. Then the theory and calculation methods of GTEM cells’characteristic impedance and interior strength of field are specified, The models of GTEM cell are built with the design scheme in the paper and with enter the different size of EUT, and the simulation results of the models are analyzed and compared, which show that the design scheme in this paper is reasonable and get the conclusion that the field distributing is well-proportioned, what is the biggest EUT that GTEM cell can test can also get. The paper realizes the impedance matching though designing characteristic impedance of GTEM cell, then the paper explains the theory of Electromagnetic wave absorber erasing TEM wave, which can explain Electromagnetic wave absorber’s importance role in impedance matching. In this paper, the design of EMC radiate emission automatic test system based on GTEM cell are told, the paper introduces the hardware composition and flow of the system, represents the process of realization of the software in the system.