The economical HP 85020A/B directional bridges also offer high (40 dB) directivity and excellent performance at RF (to 4.3 GHz) frequencies. For 50 ohm measurements choose the HP 85020A. The HP 85020B is designed for 75 ohm environments. Both RF bridges have Type-N connectors.
List of Options
1BN
Military Standard 45662A Calibration Certification
1BP
Military Standard 45662A Calibration with Test Data