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777D Coaxial Dual-Directional Coupler, 1.9 GHz to 4 GHz

Product Status: Discontinued | Currently Supported
This product is no longer available

No replacement found for this product.

Key Features & Specifications

Superior RF Performance

  • Nominal Coupling and Variation: 20 ±0.4 dB
  • Directivity: >30 dB
  • Maximum SWR: 1.2
  • Insertion Loss: <0.75 dB

Power Ratings

  • Power Rating Average, Peak: 50 W, 500 W


  • Dimensions: 225.4 mm L x 63.5 mm H x 28.6 mm W (8.88 in x 2.50 in x 1.13 in)


The Keysight 777D is an economical dual-directional coupler designed for swept measurements in the 1.9 to 4.0 GHz range. Its high directivity and mean coupling accuracy of plus or minus 0.5 dB makes the Keysight 777D ideal for reflectometer applications. The auxiliary arms track very closely, making this coupler particularly useful for reflectometers driven by sweep oscillators.