18 GHz 50 Ohm Low-Temperature Superconducting Coaxial RF Cable with PTFE Dielectric

This offering is a low-temperature superconducting coaxial RF cable for cryogenic superconducting coaxial signal transmission. It is specified with 50 ohm characteristic impedance and an 18 GHz operating frequency, while the listed cutoff frequency is 240 GHz. The cable has an operating temperature range of -268 to +150 deg C. No specific end-use equipment, installation scenario, or system-level application is stated beyond the published cable parameters

The available information defines the cable construction together with electrical, mechanical, environmental, and attenuation parameters. Its coaxial construction includes a silver-plated CuNi inner conductor, PTFE dielectric, and CuNi outer conductor, with stated diameters of 0.127 mm, 0.432 mm, and 0.580 mm respectively. Cable length, connector type, termination style, and packaging contents are not specified. These order-related details should be confirmed before purchase

The cable is specified for 18 GHz operation, with a 240 GHz cutoff frequency, 50 ohm characteristic impedance, and 70% velocity. Typical attenuation is provided at both 300 K and 4 K, ranging from 4.0 / 1.9 dB/m at 500 MHz to 23.9 / 11.6 dB/m at 18000 MHz. The table also states 165 dB shielding efficiency and 100 V DC withstanding voltage. These published values should be compared with the requirements of the intended operating condition

This cable uses a coaxial structure formed by a silver-plated CuNi inner conductor, PTFE dielectric, and CuNi outer conductor. The respective listed diameters are 0.127 mm, 0.432 mm, and 0.580 mm, and the static bend radius is 2.90 mm. Its specified operating temperature range is -268 to +150 deg C, with a listed weight of 0.002 kg/m. Connector interfaces and compatibility with particular equipment are not provided in the available data

For selection, confirm that the required system impedance corresponds to the stated 50 ohm characteristic impedance and that the intended operating frequency is within the listed 18 GHz operating frequency. Check that the required temperature is within the -268 to +150 deg C operating range and allow for the 2.90 mm static bend radius during routing. Attenuation should be reviewed at the relevant frequency and temperature using the published 300 K / 4 K values.