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11721A Frequency Doubler

Product Status: Obsolete | View Service Options
This product is no longer available

No replacement found for this product.


The Keysight 11721A frequency doubler is an ideal accessory for extending the usable frequency range of signal generators, frequency synthesizers, or other signal sources. Operating on input frequencies of 50 MHz to 1300 MHz, it provides a doubled output in the range of 100 MHz to 2600 MHz. The Keysight 11721A will work well with any RF source with an output in the range 50 to 1300 MHz. The 50 ohm passive circuit of the Keysight 11721A offers low conversion loss, low spurious, and excellent flatness over its entire frequency range when operated above +10 dBm.


  • Works with any RF source with output in the range 50 to 1300 MHz
  • Low conversion loss and spurious
  • Excellent flatness over the entire frequency range
  • Input: 50 to 1300 MHz
  • Output: 100 to 2600 MHz
  • Conversion Loss (+13 dBm input, 50 to 1280 MHz) <15 dB
  • Spurious Referenced to Desired Output Frequency f(+13 dBm input with Harmonics < -50 dBc, 50 to 1280 MHz) f/2, -15 dB; 3f/2, -15 dB
  • Input SWR: 1.5, typical
  • Input/Output Impedance: 50 ohms nominal