Agilent/Keysight 11641A

The Agilent/Keysight 11641A is a broadband RF amplifier engineered to boost signal strength across extended frequency spectra for RF testing and measurement applications. It delivers high gain with low noise figure performance, making it ideal for enhancing sensitivity in spectrum analyzers, network analyzers, and other RF test equipment requiring increased dynamic range and signal detection capability.

Technical Specifications

The 11641A operates as a broadband RF amplifier with frequency coverage across extended bandwidths typical of Keysight's amplifier portfolio. Gain reaches up to 30 dB, providing significant signal boost without proportional noise degradation. The amplifier maintains a low noise figure to preserve signal integrity throughout the measurement chain. Output power performance is characterized by saturation point (Psat) and 1 dB compression point (P1dB) specifications, defining linearity boundaries and maximum usable output levels. Voltage Standing Wave Ratio (VSWR) indicates impedance matching quality at input and output ports. Port isolation prevents unwanted signal feedback between input and output. The amplifier requires specific bias voltage and power for operation.

Key Features

• High gain up to 30 dB for weak signal amplification


• Low noise figure maintains measurement sensitivity


• Broadband frequency coverage across extended spectrum


• Defined saturation and compression point specifications


• Input/output port isolation for clean signal transmission


• Standard RF connectors (Type N or APC-3.5 mm typical)

Typical Applications The 11641A integrates with spectrum analyzers to extend dynamic range and detection sensitivity. Network analyzer measurements benefit from the amplifier's low noise and high gain characteristics. General RF test equipment applications requiring preamplification and sensitivity enhancement employ this amplifier for improved measurement floor and signal-to-noise ratio performance.

Compatibility & Integration The 11641A connects directly to Keysight and Agilent RF test instruments through standard RF connectors. Compatible external power supplies such as the 87421A and 87422A models support amplifier operation within specified bias requirements.