​How do choose millimeter wave connectors?
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​How do choose millimeter wave connectors?

Views: 0     Author: Site Editor     Publish Time: 2021-08-19      Origin: Site


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Millimeter wave connectors have the advantages of good mechanical properties, high electrical properties, simple processing, and low cost. It is welcomed by more and more manufacturers in the international market.


What is the principle of choosing millimeter wave connectors?

What is the most common connector in our daily life?

What are the basic characteristics of millimeter wave connectors?


What is the principle of choosing millimeter wave connectors?

There are many types of coaxial connectors: SMA, SMB, SMC, APC-7, millimeter wave connectors, etc. No matter what kind of connector you are using, you need to pay attention to its applicable frequency range before using it. The frequency range of the connector is limited by the excitation of the first circular wave guide propagation mode in the coaxial structure. Reducing the diameter of the outer conductor will increase the highest frequency that can be used; filling the space with insulators will reduce the highest frequency that can be used and increase system loss. The performance of all connectors is affected by the quality of the connector interface. If the diameters of the inner and outer conductors deviate from the size required by the design, the plating quality is poor, or the gap at the connection is large, the reflection coefficient and resistive loss of the interface will be degraded. This is why the same kind of connector can be used at higher frequencies with good quality, and the standing wave coefficient is smaller.

Millimeter wave connectors 

What is the most common connector in our daily life?

1. APC-7 (7mm) connector

Among all 18GHz connectors, APC-7 (Amphenol precision connector-7 mm) has the lowest reflection coefficient and can provide the most repeatable measurement. This connector was jointly developed by HP and Amphenol in the 1960s. This is a connector with a non-polar design, which can be suitable for the most demanding applications, especially the requirements of metering and calibration applications.

2. N-type connector

Type N (US Navy) 50Ω connector is a connector designed for military systems below 4GHz in the 1940s. Improvements in the 1960s pushed performance to 12GHz and later to 18GHz. Some 75Ω products use an N-type design with a smaller center conductor diameter but are not compatible with 50Ω connectors.

3. 1.85 mm connector

The 1.85 mm connector is a connector developed by HP in the mid-1980s, which is now Agilent, and its operating frequency reaches 65 GHz. In 1988, HP provided this design to the public domain to promote the standardization of connector types; through research and development, several manufacturers can provide several such devices. The 1.85mm connector is compatible with the 2.4 mm connector and has the same robustness. In recent years, 1.85mm connectors have been optimized to reach 67 GHz frequency. Many experts believe that this connector is the smallest coaxial connector possible for general use up to 67GHz.


What are the basic characteristics of millimeter wave connectors?

The working frequency is high, the size of the structure is small, and the precision is high. The millimeter wave connector uses an air interface that is small, lightweight, and highly reliable. The structural size of the connector is close to the operating wavelength, so small changes will seriously affect the electrical performance of the connector. Bring high-precision requirements for the structure and size of the connector. Because of its small size and high precision, the requirements for manufacturing technology are very high.


The millimeter wave connector has a high working frequency, small structure size, and high precision requirements. Therefore, the production process of the product has a great influence on the quality of the product. LenoRF will promise to provide customers with the best quality products with the best service attitude.

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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