The HD-EFI connector series is a solution for board-to-board RF applications, especially for the broadband and wirelss marketplaces.

The HD-EFI interface utilizes a proprietary configuration that allows for a very stabel RF signal over the full axial range of the connector system. It has generous “float” to compensate for the axial and radial misalignment due to packaging tolerances. This industry-leading float results in a maximum misalignment allowed by the system of 1.32 mm radial and 2 mm axial.

The interface is available as a 50 Ω connector system with a performance of DC to 18 GHz.


Related Products

HD-EFI Bullets


Features and Benefits

  • Available as HD-EFI for DC-18 GHz 50 Ohm systems
  • Proprietary configuration that allows for industry leading “float”




  • Mil/Aero
  • CMTS
  • Broadband
  • Switch
  • Internet
  • Routers
  • Telecommunications


HD-AFI 75 Ohm Specifications 

Impedance 50 Ohm
Frequency Range DC - 18 GHz
  Straight Connectors 1 GHz -22 dB
RF Leakage -70 dB
Power Handling 10 W @ 2 GHz


Temperature Range -55⁰C to +155⁰C


Engagement Force 6 N Max.
Disengagement Force 1 N Min.
Connector Durability (Mating) 200 mating cycles
Axial Misalignment 2 mm
Radial Misalignment 0.8 mm
Minimum PCB Spacing 12 mm
These characteristics are typical and may not apply to all connectors.

Interface Dimensions

HD-EFI is an Amphenol RF proprietary interface.  Contact us for additional information.