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8491B Coaxial Fixed Attenuator, DC to 18 GHz

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Starting From US$ 324

Typical Configuration  

Typical Configuration

8491B Coaxial attenuator, dc - 18 GHz, Type-N

  • 8491B-030 30 dB attenuator
  • R-51B-001-C Return to Keysight Warranty - 1 year


Prices for: United States

* Prices are subject to change without notice. Prices shown are Manufacturer's Suggested Retail Prices (MSRP). Prices shown are exclusive of taxes.

Key Features & Specifications

Superior RF Performance

  • Frequency Range: DC to 18 GHz
  • Maximum SWR: 1.2 to 8 GHz, 1.3 to 12.4 GHz, 1.5 to 18 GHz

Power handling

  • Maximum Input Power: 2 W (average), 100 W (peak)


  • Connector: Type-N male, female


The Keysight 8491B coaxial fixed attenuator provides precision attenuation, flat frequency response and low SWR over broad frequency ranges. The attenuator is available in nominal attenuations of 3 dB and 6 dB, as well as 10 dB increments from 10 dB to 60 dB. It has type-N connectors with a maximum frequency of 18 GHz. This attenuator is swept-frequency tested to ensure specification compliance at all frequencies. Calibration points are provided on a nameplate chart attached to each unit.

For more information about fixed rf attenuators, please visit Attenuators, Fixed.