Periodically, isolation of shields in a coaxial cable is an important consideration. Harbour has constructed a number of TRX (Triaxial) cables, expanding the product line offered in the MIL-DTL-17 specification. (Currently, the MIL-DTL-17 specification defines only one triaxial — M17/131-RG403, a triaxial version of M17/93-RG178.) With an existing double braided construction, an interlayer of insulation is used between the two braids. With a single braided cable, an interlayer and a second braid is used. Complete isolation between the braids is realized, in addition to achieving a more effective shield configuration.
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Although typical and maximum attenuation values at discrete frequencies may be found in Harbour's online catalog, this Attenuator Calculator makes it easy to compare multiple items at any operating frequency. Just type a frequency in MHz (for instance 18 GHz = 18,000 MHz) to calculate and compare typical attenuation values.
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