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At present, the radio and television systems need to adopt high power cables and their components connect transmitter and antenna, as the power transfer feeder, due to the particularity of the laid condition, both the technical requirements and the resistance to environmental requirements are very high. As in the radio and television systems, it has appeared that the cable inner conductor strike distortion, and the cable burned, finally it cannot use. This paper first is to improve the high power feeder on performance in the radio and television systems, and discusses the practical and feasible technology application. The content and result of the research can be used not only in the radio and television system of civil, and can also be used in radar, beyond the troposphere radar and the distance the ionosphere kind of radar and microwave radar relay road communication system, etc.The paper adopt the thermal expansion test, torn test, pressure test, torsion test, pressure torsion test and insulation withstand voltage test and so on, to test and analysis the mechanism of the cable failure. First of all, it revealed the mechanism of high power cable heat damage. According to the heat transfer theory, complete the cables use average power calculation with environmental conditions that adapt to, and studies the relationship of power varies with temperature, and provide a theoretical basis for the future selection of high-power cables. On this basis, researched the high power cable with small attenuation, low VSWR, and the phase consistency technology, and optimization design the cable assembly structure which meet the field use conditions, through the insulation supporting technology, manufacturing technology research, improve meet some of the bending radius of cables. This paper proposes four kinds of implementation scheme and feasibility analyses. Among them, the cables with PTFE gasket insulation structure, take the middle of two pairs of connector technology, with the three pillars of the100m cable assembly into a length of300meters of cable assembly, the feasibility is the best. In addition to the cable, the reliability of the connector and components are analysis. Through the above testing and analysis, finally we solve the arches phenomenon of inner conductor appears when in the use of the high power cable assemblies with great length in harsh environments, improve the reliability of high power cable component with long-term use.
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