In 1983, Wiltron’s William.Old.Field senior engineer developed a new type of 2.92mm/K type connector based on the summary and customer service of the millimeter wave connectors previously introduced (the K type connector is a trademark of Wiltron’s formula ), the inner conductor diameter is 1.27mm, which can be inserted into SMA and 3.5mm connectors. The 2.92mm connector has good electrical performance in the frequency range of DC~46GHz, and is mechanically compatible with SMA connectors and 3.5mm connectors. It is quickly recognized by the majority of manufacturers and has become one of the most widely connectors used millimeter wave in the world. 


2.4mm connector
The 2.4mm connector is a connector with an outer conductor inner diameter of 2.4mm and impedance of 50Ω. The operating frequency can reach 50GHz
2.4mm connectors are mechanically compatible with 1.85mm connectors and can be interconnected, but they cannot be mated with 2.92mm, 3.5mm or SMA connectors.


1.85mm connector
The 1.85mm connector is a connector with an outer conductor inner diameter of 1.85mm and an impedance of 50Ω. The operating frequency can reach 67GHz, and it can be mechanically compatible with 2.4mm connectors.