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R347B

Keysight Technologies (Agilent HP)Sources, Noise

The Keysight (Agilent) R347B is a high-performance R-band waveguide noise source operating in the 26.5 to 40 GHz frequency range. Designed to enable precise and convenient noise figure and gain measurements on millimeter-wave devices, the R347B features exceptional Excess Noise Ratio (ENR) stability over time, minimizing calibration frequency and ensuring repeatable test results. Its solid-state design and low SWR offer excellent reliability for advanced RF and microwave laboratory testing.

Millimeter-WaveNoise FigureRF and Microwave

Specifications

General

ParameterValue
InterfacesBNC (female) drive input

Physical

ParameterValue
Power Supply+28 V ± 1 V (pulsed from noise figure analyzer/source)
Operating Temperature0 to 55 °C
Dimensions (W×H×D)41 mm × 41 mm × 135 mm
Weight0.18

RF Performance

ParameterValue
Frequency Range26.5 to 40.0 GHz
Waveguide BandR-band
Excess Noise Ratio (ENR)5 to 13 dB
Maximum SWR1.35 (source ON or OFF)
Waveguide SizeWR-28
Waveguide FlangeUG-599/U (compatible with MIL-F-3922/54-003)

Electrical & Drive

ParameterValue
Drive Voltage (Source On)+28 V ± 1 V

Environmental

ParameterValue
Storage Temperature Range-55 to +75 °C
Maximum Operating Altitude4,570 m (15,000 ft)
Maximum Storage Altitude15,240 m (50,000 ft)
Operating HumidityUp to 95% RH at 40 °C

Calibration

ParameterValue
Recommended Calibration Interval1 year
Calibrated Frequency Points26.5 to 40 GHz in 1 GHz steps

Performance

ParameterValue
Calibration Frequency Intervals1 GHz steps
Nominal ENR5 to 13 dB

Connectivity

ParameterValue
Bias ConnectorBNC (f)

Compatibility

ParameterValue
Compatible InstrumentsKeysight NFA series noise figure analyzers, legacy HP 8970B noise figure meter

Technology

Solid-state diode

Applications

Noise figure and gain measurements of millimeter-wave components