Cover story
Low loss cables for EMC
What makes Insulated Wire cables different? All cables are manufactured in house using a proprietary method for laminating Tefl on. This process enables a concentric cable construction that provides tight impedance control, excellent phase stability and exceptional attenuation performance across the microwave spectrum.
coax for lower frequency/high-V/m testing, and industry leading low attenuation products for up to 18GHz and 40GHz testing where long cable runs demand lowest cable losses to ensure measurement integrity. Insulated Wire delivers cable and assemblies for the
following EMC test applications: • Immunity/susceptibility – high power/low loss cable assemblies for high V/m @ 3GHz.
• Radiated emissions – lowest loss cable for 18GHz and 40GHz testing.
• Vehicle EMC – emissions and immunity testing, also CSIPR25 compliant cable assemblies with external ferrites can be supplied.
• Custom designs – custom designed assemblies (including composite solutions) are provided for applications where mixed signal interconnect and/ or repeated flexing on a telescoping antenna are required.
• European manufacture and repair capability – assembly partners in the EU and UK can build/test new and also repair damaged cables. In addition there are standard options – with additional protection: • 03 ‘Tuf-Flex’ internal armoring; • ‘A’ stainless steel external armor; • ‘NX’ nomex braid; • ‘N’ Neoprene (heat shrink sleeving). Insulated Wire also provides other jacket types
(replacing yellow FEP), which include Tefzel, LS/ZH polyurethane, silicone and Santoprene.
www.insulatedwire.com
All cable designs are double shielded to ensure signal integrity, a key parameter for any cable in an EMC/EMI test environment. We can also add additional shielding layers if required – control of the manufacturing process enables us to offer completely custom solutions without a large minimum order quantity.
What typical cable choices does Insulated Wire offer for compliance testing?
Insulated Wire supports EMC/EMI defence and commercial testing applications across the world with low loss/phase stable coaxial assembly products. All our cables can be customised to suit the application’s specifi c requirements, to provide a reliable solution for RF measurements.
For broadband testing, our 280 series provides the lowest attenuation – 0.2dB/ft (0.62dB/m) (max) at 18GHz. Available with a wide range of industry standard interconnect including SMA, TNCA and N-type are all stainless steel designs developed specifi cally for the 280 series to achieve optimum performance. This series of cables is available with solid and stranded centre conductors and armouring options to protect against accidental damage.
Should testing up to 40GHz be a requirement, the 157 series cables also offers the lowest loss in the industry with 0.66dB/ft. (2.1dB/m) (max) attenuation. Available with 2.92mm connectors and jacketing/ruggedisation options, 157 is an ideal solution for longer cable assembly requirements with minimal attenuation at microwave frequencies.
Does Insulated Wire manufacture high power coax?
When testing at high power/high V/m up to 6GHz, Insulated Wire can provide larger diameter cables with extremely low loss and therefore deliver maximum RF power to the antenna and maintain fl exibility, which can be a consideration when selecting high power coax. Two primary cable types have been developed for high power applications:
• 7506 – 0.057dB/ft. (0.87dB/m) (max) at 6GHz. Currently our highest power handling cable, supplied with a Santoprene jacket to provide fl exibility for cable routing and ensuring material stability at higher temperatures.
• 4806 – 0.08dB/ft (0.32dB/m) (max) at 6GHz. An established product, in use in EMC/EMI applications across the world; yellow FEP jacket as standard, with Santoprene available as an option.
www.electronicsworld.co.uk November 2025 07
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