The Keysight 85131H is a 62.2 cm long, flexible RF cable with a 3.5 mm male connector and a 3.5 mm female connector, designed for the frequency range from DC to 26.5 GHz. It offers an excellent return loss of at least 16 dB and an insertion loss of 0.25 × √f + 0.2 dB (f in GHz) at the test port. With a phase stability of less than 0.12 dB and a phase deviation of 0.13° × f + 0.5° with a 90° bending radius of 7.6 cm, this cable is ideal for precise high-frequency measurements with network analyzers.