18 GHz Cryogenic Coaxial RF Cable with Beryllium Copper and PTFE

This listing is for a coaxial RF cable with beryllium copper inner and outer conductors and a PTFE dielectric. Its published operating frequency is 18 GHz, and the cutoff frequency is listed as 154 GHz. The supplied data also gives an operating-temperature range of -268 to +150 and typical attenuation figures at both 300K and 4K. Connector type, finished cable length, and end-use application are not specified in the available information

The documented construction includes a 0.23 mm beryllium copper inner conductor, a 0.64 mm PTFE dielectric, and a 0.86 mm beryllium copper outer conductor. The table also lists a 1.60 mm static bend radius and a weight of 0.003 kg/m. No alternative construction, cable length, connector, or accessory is identified for this listing. Buyers should confirm required deliverables and termination details when making an inquiry

The cable is specified with 50+/-3 ohm impedance, 77% velocity, 165 dB shielding efficiency, and 100 V DC withstanding voltage. Typical attenuation is published from 500 MHz through 18000 MHz at 300K and 4K. At 500 MHz, attenuation is 2.60 dB/m at 300K and 1.80 dB/m at 4K; at 18000 MHz, it is 16.00 dB/m and 10.70 dB/m respectively. These values are identified as typical data at 25 C and sea level

The supplied information identifies a coaxial structure using beryllium copper for both conductors and PTFE for the dielectric. The dielectric O.D. is 0.64 mm, while the outer-conductor O.D. is 0.86 mm. The listed operating-temperature range is -268 to +150, and the static bend radius is 1.60 mm. Connector interfaces, mating components, and compatibility with particular equipment are not specified and should be confirmed separately

For selection, compare the required operating frequency with the listed 18 GHz operating frequency and verify compatibility with the stated 50+/-3 ohm impedance. Temperature requirements can be checked against the published -268 to +150 operating range. Where loss is important, compare the intended frequency and temperature condition with the paired 300K and 4K attenuation values from 500 MHz to 18000 MHz.