High-Speed Transmission Cable Performance- Simulations and Measurements

In this paper, a high-speed cable (25 Gb/s) with a longitudinal screen is modeled using HFSS software, which is based on the finite element method. The cable model is constructed directly in HFSS software, where the simulation is performed in the frequency domain up to 20 GHz. Consequently, the single-mode S-parameters of the cable are obtained and transformed into the mixed-mode S-parameters using MATLAB codes. Moreover, the simulated mixed-mode S-parameters are compared with the measurement data obtained by a network analyzer in order to examine the accuracy of the modeling strategy, where a very good agreement is obtained. This HFSS modeling can help us to understand the operation of the cable and its mode conversions before the actual fabrication of the cable.