DC to 18 GHz Low Loss Semi-Rigid RF Cable with Phase-Stable 50 Ohm Construction

This offering is a semi-rigid RF cable intended for low-loss, phase-stable RF interconnection. Its documented construction combines a silvered copper center conductor, low-density PTFE dielectric, and ternary-alloy-plated seamless annealed bare copper-tube outer conductor. The cable is specified with 50 ohm impedance and an operating frequency range from DC to 18 GHz.

The documented configuration is a semi-rigid RF cable with a 1.78 mm center-conductor O.D., 5.33 mm dielectric O.D., and 6.35 mm outer-conductor O.D. Its listed material structure is silvered copper, low-density PTFE, and a ternary-alloy-plated seamless annealed bare copper tube. The supplied parameters state a cable weight of 136 g/m and a 32 mm bend radius.

The cable is specified for DC to 18 GHz operation, with 50 ohm impedance and 76% velocity. At 25 deg C and sea level, typical attenuation changes from 0.10 dB/m at 300 MHz to 0.86 dB/m at 18000 MHz. Over the same frequency points, stated typical power changes from 2699 W to 308 W. Additional typical attenuation and power values are provided at 1000, 3000, 6000, 8500, and 12400 MHz, and these values apply under the stated test conditions

The semi-rigid structure has a silvered copper center conductor, a low-density PTFE dielectric, and a plated seamless annealed copper-tube outer conductor. The outer conductor has a 6.35 mm O.D., while the stated minimum bend radius is 32 mm. Shielding effectiveness is specified as greater than 165 dB, and voltage withstanding is listed as 2200 V DC. The operating temperature range is -55 to +250 deg C.

For selection or quotation, provide the required operating frequency and compare it with the specified DC to 18 GHz range. Confirm the required cable length, end termination or connector requirements, and available installation bend condition, since these details are not included in the supplied configuration data. The documented 50 ohm impedance, 32 mm bend radius, and -55 to +250 deg C temperature range are useful selection points.