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How To Determine The Performance Of Cable Assembly
- Aug 14, 2017 -

    General design guidelines for RF cables the correct selection of RF cable components in addition to the frequency range, standing wave ratio, insertion loss and other factors, but also consider the mechanical characteristics of the cable, the use of the environment and application requirements, in addition, the cost is also a constant factor. In this paper, the various indexes and performance of RF cable are discussed in detail, and it is very useful to know the performance of cable for choosing the best RF cable components. RF coaxial cable is used to transmit RF and microwave signal energy.Cable Assembly
     It is a kind of distributing parameter circuit, its electric length is the physical length and the transmission speed function, this and the low-frequency circuit has the essential difference. RF coaxial cable is divided into half, half soft flexible cables three kinds, different applications should choose different types of cable. Semi-rigid and semi-flexible cables are generally used in the interconnection of equipment, while flexible cables should be used in the field of testing and measurement. Semi-rigid Cable As the name suggests, the cable is not easy to bend, the outside conductor is made of aluminum tubes or copper tubes, its RF leakage is very small (<-120db), in the system caused by the signal crosstalk can be ignored. The passive intermodulation characteristics of this cable are also ideal. If you want to bend to a certain shape, you need a special molding machine or a handmade abrasive to complete it.Cable Assembly
    So troublesome processing technology in exchange for a very stable performance, semi-rigid cable using solid PTFE material as a filler medium, this material has a very stable temperature characteristics, especially at high temperature conditions, with very good phase stability. The cost of semi-rigid cable is higher than that of semi flexible cable, and it is used in a variety of RF and microwave systems. Semi-flexible cable semi-flexible cable is a substitute for semi-rigid cable, the performance of this cable is close to semi-rigid cable, and can be manually formed. But its stability is slightly worse than the semi-rigid cable, because it can be easily molded, the same also easy to deform, especially in the case of long-term use. Flexible (braided) cable Flexible cable is a "test-level" cable.Cable Assembly
    Flexible cables are expensive relative to semi-rigid and semi flexible cables because of the more factors that flexible cables have to take into account in design. Flexible cables are easy to bend multiple times and maintain performance, which is the most basic requirement for testing cables. Soft and good electrical indicators are a pair of contradictions, but also lead to expensive cost of the main reason. Cable Assembly
    Selection of flexible RF cable components to consider a variety of factors at the same time, and some of these factors are contradictory, such as the single stranded conductor coaxial cable than the multiple strands with lower insertion loss and bending amplitude stability, but the phase stability can be less than the latter. Therefore, the selection of a cable assembly, in addition to the frequency range, standing wave ratio, insertion loss and other factors, but also consider the mechanical characteristics of the cable, the use of the environment and application requirements, in addition, the cost is a constant factor.Cable Assembly