Coaxial 1.0mm, 1.85mm, 2.4mm, 2.92mm, 3.5mm each connector introduction and differences
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Coaxial 1.0mm, 1.85mm, 2.4mm, 2.92mm, 3.5mm each connector introduction and differences

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1.0mm/1.85mm/2.4mm/2.92mm/3.5mm, their form factor is very similar. But the applicable frequency range, manufacturing process, body material, inner conductor gold plating thickness, and form factor are different, and the application areas are also different.


The following is a list of catalogs:

  • l Coaxial 1.0mm, 1.85mm, 2.4mm, 2.92mm, 3.5mm connectors introduction

  • l Coaxial 1.0mm, 1.85mm, 2.4mm, 2.92mm, and 3.5mm connector differences

Coaxial 1.0mm, 1.85mm, 2.4mm, 2.92mm, 3.5mm connectors introduction

Coaxial 1.0 mm Connectors

The 1.0 mm is a coaxial threaded connector and the 1 mm is the outer conductor ID size. The connectors are designed to support all modes of transmission up to 110 GHz, an important achievement for precision manufacturing that enables reliable and flexible interconnections. Unlike 1.85mm connectors.

1.85mm Connectors

These connectors are now available with an outer conductor inner diameter of 1.85mm and an impedance of 50 ohms. They have a smaller inner diameter size, so the operating frequency is higher, and the operating frequency can reach 67GHz.

2.4mm Connectors

The connector outer conductor’s inner diameter is 2.4mm. Unlike the 1.85mm connectors, the impedance of 50 ohms connector, and the 2.4mm connector are mechanically compatible with the 1.85mm connector, the outer conductor’s inner diameter of 1.85mm, both impedance is 50 ohms. They have a small inner diameter size, so they work at higher frequencies, nominal frequencies of up to 50GHz and 67GHz, respectively. Remember that they must not be connected with 2.92mm, 3.5mm, or SMA connectors, otherwise, it directly brings the consequences of connector damage!

2.92mm Connectors

The connector (some manufacturers call this connector K-type connector, there are some manufacturers called SMK, KMC, WMP4 connector, etc.) is an outer conductor inner diameter of 2.92mm, the characteristic impedance of 50Ω, a connection mechanism for the 1/4-36UNS-2 inch thread RF coaxial connector. Its structure is similar to the 3.5mm connector, only smaller. Unlike 1.85mm connectors, 2.92mm connector in the DC ~ 46GHz band range, has good electrical performance and can be compatible with SMA connector, 3.5mm connector mechanical, quickly recognized by the majority of manufacturers, become one of the most widely used international millimeter wave connectors.

3.5mm Connectors

The connector is the outer conductor's inner diameter of 3.5mm, a characteristic impedance of 50Ω. Unlike 1.85mm connectors, 3.5mm connectors can work up to 33GHz, which is the earliest available to the millimeter wave band of an RF coaxial connector. One obvious difference from SMA connectors (including Southwest Microwave's "Super SMA") is that 3.5mm uses an air dielectric. The outer conductor of the 3.5mm connector is thicker than the SMA connector, and the mechanical strength is better than that of the SMA connector. So not only is the electrical performance better than SMA connectors, but mechanical durability and repeatability of performance are higher than SMA connectors, and therefore more suitable for use in the testing industry.

Coaxial 1.0mm, 1.85mm, 2.4mm, 2.92mm, and 3.5mm connector differences

RF coaxial connectors 1.0mm, 1.85mm, 2.4mm, 2.92mm, and 3.5mm refer to different series, such as 2.92mm series RF coaxial connectors, other common series such as series, same series, and so on, these different series can be docked and interchangeable between each other. But most cases are not mutually docked and interchangeable, such as series and series, literally multiple s. It can not be related to the docking and interchangeable.

If you want to know more information about the 1.85 connectors, welcome to consult us. Our website is

Our company, Zhejiang LenoRF Industry co. LTD, occupies an area of 30 hectares and is equipped with world class equipment to make millimeter wave connectors and phase stable cables. We specialize in coaxial connectors, cable assembly, and passive devices. Our current products are the latest millimeter wave connector and phase stable cable on the market.

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