Agilent / Keysight R85026A WR-28 Waveguide Detector, 26.5 GHz to 40 GHz

The Agilent/Keysight R85026A is a WR-28 waveguide detector engineered for RF power measurement across the 26.5 GHz to 40 GHz band. This precision component converts RF signals into quantifiable power levels through dual detection modes: DC detection for unmodulated signals and AC detection for amplitude-modulated waveforms. The detector outputs a 27.778 kHz square wave, compatible with Keysight 8757 series analyzers for direct power assessment.

– Technical Specifications

• Frequency Range: 26.5 GHz to 40 GHz
• Waveguide Size: WR-28 (UG-599/U flange)
• Power Measurement Range: AC mode +10 dBm to -50 dBm; DC mode +10 dBm to -45 dBm
• Return Loss: 12 dB
• Frequency Response: ±1.5 dB
• Dynamic Accuracy: ±(0.3 dB + 0.03 dB/dB)
• Maximum Input Power: +10 dBm
• Video Sensitivity: 1500 mV/mW (typical)
• Tangential Sensitivity: -50 dBm
• Input Dynamic Range: -55 dBm to +10 dBm
• Detection Speed Rise Time: 5 nsec

– Key Features

• Dual detection modes support both modulated and unmodulated RF signals
• 27.778 kHz square wave output for direct analyzer integration
• Brass construction with gold-plated finish ensures reliability
• SMA female connector for DC output interface
• Fast 5 nsec rise time enables transient response measurement

– Typical Applications

• Telecommunications RF power monitoring
• Aerospace and defense test systems
• Research and development RF characterization
• High-frequency waveguide system integration

– Compatibility & Integration

Primary compatibility: Keysight 8757X and 8757 series test sets. The detector integrates directly into WR-28 waveguide systems via standard UG-599/U flanged connections.