Experiencing High Impedance on Coax Assembly?

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Custom Interface Team

Customers bring many questions to our team about their wire cable harnesses. This question is about how customers are experiencing high impedance on coax assemblies.

Most coaxial cables have a characteristic impedance of either 50, 52, 75, or 93 Ω. The RF industry uses standard type-names for coaxial cables. To review: In electrical engineering, impedance is the opposition to alternating current presented by the combined effect of resistance and reactance in a circuit.

Here is an occurrence with a potential solution from the Custom Interface team:

Occurrence:

If the coax cable was secured with lacing or tie wrap that has been applied too tightly, this might have indented the insulation, reducing the effectiveness of the dielectric and causing high impedance.

spiral-wrap

Solution:

>  Specifying not to tie lacing tight enough to indent insulation in the drawing,
Use a wider lacing to increase surface area and reduce pressure points
      and/or
>  Choosing another method for bundling (such as expandable sleeving).
    …may be a better solution.

We are very proud of our team who makes every effort to adapt to the constant changes to meet the highest wire harness manufacturing standards. From the point of design and assembly at the drawing board to the finished wire harness, our team goes through the step-by-step planning process. Each wire harness has a specific purpose and usually integrates into a larger electronic network. They understand that wire harnesses are indispensable and looking forward to building yours.

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