OptEM To Present "Design Optimization of Screened Twisted Pairs" At IWCS 2019
31 Jul 2019
OptEM will be exhibiting in booth 407 at the IWCS Conference/International Cable Connectivity Symposium in Charlotte, NC, USA from September 29 - October 2, 2019. The IWCS presents the latest technologies in new and original wire and cable product design, materials, applications, processes and trends. OptEM will demonstrate OptEM Cable Designer a cable design software tool customized to design, analyze and model electrical and propagation parameters for all types of copper cables.
Optem will present a paper entitled "Design Optimization of Screened Twisted Pairs" at the IWCS in Charlotte, NC, USA. The presentation will be held on Tuesday, October 1, 2019 from 1:00 PM to 4:25 PM. Specifically, the Session is focused on Advancing Power (POE) & Data Transmission Over Copper.
Abstract - The paper will demonstrate how OptEM Cable Designer, a software tool equipped with an electromagnetic field solver, can be used to optimize the design of an individually Screened Twisted Pair (STP) cable. Since the placement of screens on individual pairs of data cables addressed the problem of crosstalk, the paper focuses on the issues related to characteristic impedance and attenuation of the cable. It is accepted that attenuation became a critical design property of data cables operating in the GHz frequency range. This paper offers only a theoretical study of characteristic impedance and attenuation in STP cables. To achieve this goal, the author creates sensitivity tables for a 100 Ohm STP cable. Then, directed by the tables, the impact of individual design parameters on attenuation and characteristic impedance is investigated. The design parameters include: lay length, wire conductivity, screen conductivity, insulation loss tangent and dielectric constant, and wire and insulation diameters. It is demonstrated that selection of dielectric constant of the insulation has a critical impact on attenuation and that, depending on the selected dielectric, one can calculate an optimal characteristic impedance which leads to smallest attenuation of the STP cable.
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