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Radio frequency (RF) cable is the main physical carrier of signal transmission. Signal transmission of RF performance is affected by multiple factors. In the paper, 3D finite element analysis of RF cable was built and signal attenuation characteristics of single factor for RF cable was studied, such as insulating layer thickness, the frequency and ambient temperature. By orthogonal design, insertion loss and variance analysis of nine parameters for RF cable were discussed. And results show that the more thickness RF cable insulation increases, the less signal attenuation characteristic deceases. The more signal frequency increases, the more signal attenuation characteristic increases. The higher temperature increases, the more signal attenuation characteristic increases. Insertion loss was affected by multiple factors ranked in order from big to small, signal frequency, insulation thickness, ambient temperature, maximum significant. KEYWORD: RF cable, Signal attenuation, Orthogonality design, Regression mode 4th International Conference on Mechanical Materials and Manufacturing Engineering (MMME 2016) © 2016. The authors Published by Atlantis Press 108 RF cable in uniform, each circuit parameters is evenly distributed over cable, the voltage and current cable is a function of time (t) and distance(x). To take a length of x  which is micro-segmentation to study on the RF cable, when 0 x   , you can ignore x  the distribution of circuit parameters on the micro segment, and then replaced with a lumped parameter circuit equivalent, thus, the whole uniform RF cable be viewed as consisting of countless x  . Fig. 2 is a RF cable x  microsegment. x  R x  L x  G x  C x  A B

Analysis of signal transmission performance of radio frequency cable under the multiple factors