Agilent/Keysight 11664A

The Agilent/Keysight 11664A is an envelope detector engineered for scalar network analyzers in the 8755, 8756, and 8757 series. It demodulates 27.8 kHz square-wave amplitude-modulated RF signals and presents detection results directly on the analyzer display. Operating in AC mode only, this detector covers 10 MHz to 18 GHz with a maximum input power rating of +20 dBm (100 mW) and 50 ohm input impedance.

Technical Specifications

• Frequency Range: 10 MHz to 18 GHz


• Detection Range: +16 dBm to −60 dBm


• Maximum Input Power: +20 dBm (100 mW)


• Input Impedance: 50 ohms


• Input Connector: Type N male (standard); APC-7 (Option 001); SMA jack (Option 002); Type N female (Special Order)


• Cable Length: 48 inches (1.2 meters)


• Weight: 6 oz (0.17 kg)


• Operating Temperature: 0 to 55 °C


• Storage Temperature: −40 to 75 °C

Key Features

• Requires 27.8 kHz square-wave amplitude modulation of RF input signal


• Detector-to-detector tracking specifications: - 10 MHz to 8 GHz: <0.5 dB - 8 GHz to 12 GHz: <1.0 dB - 12 GHz to 18 GHz: <1.5 dB


• Includes color-coded snap-on identification clips


• Compact, lightweight design at 6 ounces

Typical Applications Scalar network analysis and RF envelope detection across microwave and millimeter-wave bands. Suited for swept amplitude measurements where modulated signal detection is required.

Compatibility & Integration Designed for integration with Keysight/Agilent 8755, 8756, and 8757 series scalar network analyzers, as well as HP 8755A, 8755C, and 8756A instruments. This is a discontinued product.