Agilent / Keysight 83051A Microwave System Amplifier, 45 MHz to 50 GHz

The Keysight 83051A is a microwave system amplifier delivering consistent gain and high output power across 45 MHz to 50 GHz. Engineers and systems integrators use this unit to recover system losses and enhance available power in RF and microwave ATE systems. Its broad frequency coverage eliminates the need for multiple narrow-band amplifiers, crossover networks, and separate bias supplies - reducing system complexity and footprint.

Technical Specifications

• Frequency Range: 45 MHz to 50 GHz


• Small Signal Gain: >23 dB minimum; ±3.5 dB flatness maximum


• Output Power (P1dB): >8 dBm to 45 GHz; 6 dBm to 50 GHz


• Noise Figure: <12 dB typical (45 MHz–2 GHz); 6 dB typical (to 26.5 GHz); 10–50 GHz typical


• Third Order Intercept (TOI): 38 dBm typical (2–20 GHz)


• Harmonics: –20 dBc typical (1–2 GHz at specified max power)


• Input SWR: 2.1 maximum


• Output SWR: 2.2 maximum


• Reverse Isolation: –50 dB typical


• Survival Input Power: +20 dBm maximum


• Power Dissipation: 5 W


• Bias Voltage: +12 V @ 425 mA; –12 V @ 50 mA

Key Features

• Single-stage amplification covers 45 MHz through 50 GHz without tuning adjustments


• Compact form factor enables direct in-line insertion into existing architectures


• Input/output impedance controlled within specified SWR limits for predictable system integration


• RF connectors: 2.4 mm (female); DC detector output: BNC (female)


• Optimized gain flatness (±3.5 dB) across octave-spanning frequency range

Typical Applications

• Radar system test and characterization


• Telecommunications RF front-end validation


• Microwave component and subsystem development


• Multi-frequency ATE signal conditioning

Compatibility & Integration The 83051A operates with the Keysight 87421A 25 W Power Supply, providing unified bias distribution and eliminating multi-supply complexity. Its ability to replace multiple narrow-band amplifiers reduces component count and improves system reliability.