The Agilent/Keysight R347B is a millimeter-wave noise source engineered for R-band applications spanning 26.5 to 40 GHz. This calibrated noise generator delivers precise broadband noise signals required for accurate noise figure measurements in millimeter-wave systems and components. The source operates via +28 V DC excitation and produces two distinct noise states—powered and thermal—enabling direct gain and noise characterization of devices under test when paired with compatible noise figure meters or analyzers.
– Technical Specifications
• Frequency Range: 26.5 to 40 GHz
• Excess Noise Ratio (ENR): 10 to 13 dB
• Output Connector: R-band waveguide G-599/U flange
• Bias Connector: BNC (female)
• Power Supply: 28 V ±1 V DC (integrated with 8970B meter)
• Maximum Reverse Power: 100 mW
• Source Impedance Match (SWR): <1.42 (source off), <1.31 (source on)
• ENR Stability: <0.005 dB/V over voltage; <0.009 dB/°C over temperature
• Switching Speed: <10 μs
• Operating Temperature: 0 to 55 °C
• Physical Dimensions: 52 mm × 108 mm × 60 mm
• Weight: 0.21 kg (net); 0.36 kg (shipping)
– Key Features
• Exceptional ENR stability supporting extended recalibration intervals
• Minimal SWR across the millimeter-wave band ensures accurate source characterization
• Rapid switching enables efficient noise figure workflows
• Compact form factor integrates directly into benchtop measurement systems
– Typical Applications
• Noise figure characterization of low-noise amplifiers (LNAs) and RF front-end modules
• System-level noise performance validation in satellite and millimeter-wave communication systems
• Component qualification and acceptance testing in aerospace and defense programs
• R&D verification of wideband millimeter-wave receiver designs
– Compatibility & Integration
The R347B connects directly to the Agilent 8970B or Keysight 8970B Noise Figure Meter, which supplies bias power automatically. Integration with Keysight NFA and X-Series (PXA, MXA) analyzers extends measurement capability to systems-level characterization workflows.
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