Agilent/Keysight 909C

The Agilent/Keysight 909C is a precision coaxial termination engineered as a calibration standard for RF and microwave test systems. It delivers low-reflection termination in 50-ohm coaxial circuits with exceptional impedance stability across DC to 2 GHz. Built on tantalum nitride on sapphire thin-film technology and fitted with gold-plated beryllium copper contacts, the 909C combines minimal VSWR with solid mechanical performance in demanding laboratory environments.

Technical Specifications

• Impedance: 50 Ω


• Frequency Range: DC to 2 GHz


• Reflection Coefficient (909C APC-7): 0.0025 SWR (1.005:1 at 2 GHz)


• Reflection Coefficient (Type-N models): 0.005 SWR (1.01:1 at 2 GHz)


• Average Power Rating: 500 mW (0.5 W)


• Peak Power Rating: 100 W (10 ms pulse or 10 µs pulse)


• Connector Options: APC-7 (909C), Type-N male (909C-012), Type-N female (909C-013)


• Length: 51 mm (2 in)


• Weight: 60 g (2 oz)

Key Features

• Tantalum nitride on sapphire construction ensures long-term impedance stability


• Gold-plated beryllium copper connector contacts provide superior wear resistance


• Ultra-low VSWR across full frequency range


• Handles both continuous and pulsed power without degradation


• Compact, rugged design rated for laboratory and field use

Typical Applications

• Calibration standard for network analyzers


• System impedance verification and validation


• RF and microwave test setup calibration


• Load termination in 50-ohm measurement systems

Compatibility & Integration Available in three connector configurations to match existing test bench infrastructure. The 909C (APC-7) variant delivers the lowest reflection coefficient; Type-N male and female options (912C-012, 909C-013) provide standard coaxial integration while maintaining excellent performance characteristics.