Agilent/Keysight 8473D

The Agilent/Keysight 8473D is a precision RF detector engineered for accurate power measurements across microwave and millimeter-wave frequencies. Built on Planar-Doped Barrier (PDB) diode technology in gallium arsenide, the detector combines point-contact and low-barrier Schottky diode benefits to deliver superior broadband flatness, square-law response, and low SWR. Its rugged construction and high ESD resistance make it suitable for demanding measurement environments.

Technical Specifications

• Operating range: 10 MHz to 33 GHz (with typical performance extending to 40 GHz)


• Frequency response: ±0.25 dB from 0.01 to 14 GHz; ±0.4 dB to 26.5 GHz; ±1.25 dB to 33 GHz


• SWR: 1.2 (0.01–14 GHz), 1.4 (14–26.5 GHz), 3.0 (26.5–33 GHz) Power & Sensitivity


• Maximum operating input power: 200 mW continuous


• Short-term maximum ( 0.5 mV/µW


• Output noise: < 50 mV peak-to-peak (at 100 mV output, 400 kHz bandwidth) Connectors


• Input: APC-3.5 male (SMA compatible)


• Output: BNC female Output Polarity


• Standard: Negative


• Option 003: Positive output available Thermal & Environmental


• Operating temperature range: −65 °C to +100 °C


• Temperature cycling per MIL-STD-883 Method 1010.1


• Altitude rated to 50,000 ft (15,240 m)

Key Features

• Planar-Doped Barrier diode technology for broadband performance and repeatability


• High ESD immunity ensures long-term reliability in field applications


• Dual output polarity option accommodates diverse measurement setups


• Low SWR across primary operating band minimizes measurement uncertainty

Typical Applications Power measurement in RF/microwave testing, component characterization, transmitter and receiver validation, and bench-level power detection to 33 GHz.

Compatibility & Integration Standard APC-3.5 input connector accepts standard SMA-compatible test cables. BNC output integrates directly with power meters and oscilloscope inputs. Note: RF leakage below 1 GHz may appear at the video connector; mitigation via low-pass filtering is available if required.