About the 2.9 mm Interface

The 2.9mm connector is considered a millimeter-wave, precision grade interface designed for superior higher frequency performance with a mode free operating frequency of 46 GHz ( K Band). The 2.9mm designation refers to the inner diameter of the outer conductor (connector housing). 2.9mm connectors are mechanically compatible to mate with SMA and 3.5mm connectors making it a very versatile interface. The primary application for this connector is for use as a port interface on test & measurement equipment or components that require superior performance at extended high frequencies. Used with phase stable cables the 2.9mm connector offers measurement accuracy required in test cable applications.


2.9 mmtechnical diagram

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Nominal Impedence50 ohms ohms
Frequency RangeDC to 46 GHz
Voltage Rating250 volts rms
Dielectric Withstanding
750 volts rms


Mating Characteristicsper IEC STD 169-23
Connector Durability500 cycles min.
Recommended Torque9 in-lbs nominal


BodyStainless Steel, Passivate or Gold Plated
Contacts (Inner)Female: Beryllium Copper, Gold Plated. Male: Brass, Gold Plated.
Contacts (Outer)Stainless Steel, Passivate or Gold Plated
Contacts (Slotted)
InsulatedNoryl PPO EN265
Gaskets & SealsSilicone Rubber


Tempurature Range-85°F to +194°F (-65°C to +90°C)
VibrationMIL-STD-202 Method 204
ShockMethod 213
Moisture ResistanceMIL-STD-202 Method 106
Corrosion (salt spray)MIL-STD-202 Method 101

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2.9 mm Performance Charts