Implimentation Of The Shielded Cable Performance Test And Assessment Systems Based On RE102

With the rapid development of the information industry, the electromagnetic environment has become very critical. Cable is an important part of a electromagnetic system, which is both sensitive of and harmful to electromagnetic environment.In a harsh EM environment, Person have to use shielded cable. Some standard interfaces products, such as GPIB, MIL-STD1553and Ethernet connecter, must match shielded cable in use.The shielded cable is often used in the case of transmission information between the devices. It is possible to define a shielded cable into two separate transmission lines, one of which is called the outer transmission line, and the other one called the inner transmission line. Electromagnetic interference (EMI) can generate excitation in the outer transmission line. If the cable shield is not a erfect conductor, some of the induced currents and the charges will pass through the shield, and then generate an induced excitation in the inner transmission line. Harmful effects will be caused in the equipment if without effect protection meanse. The main innovation work of this paper is as follows:1. Propose a new test system for approach-Shielded cable preformance testing and assessnent based the RE102. According to the test equipment re-derive the electromagnetic fields E and H, the circuit parameters I and V, as well as transfer parameters specific formula, measurement formula.2. Wideband test data are fitted with theory and corrected,then the corresponding formulas are derived.Proposed "broadband test data the theory fitting" transfer parameters cognitive method.3. Test system PC workstation is written in C#which includes two part:1) transfer impedance and shield cable calculation part;2)database and Braiding parameters calculation part.