There are various types of connectors in the RF coaxial field. Among millimeter-wave connectors, K-type and 2.4mm connectors are frequently mentioned. This article will introduce the advantages of these two types of connectors respectively and conduct a brief comparison.

I. Introduction to the Characteristics of K-Type Connectors

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K-type connectors can be used in the frequency band of DC-46GHz, with excellent electrical performance. They are compatible with the widely used SMA connectors at present, and have been quickly recognized by manufacturers. They have become one of the most widely used millimeter-wave connectors internationally. Their key characteristics are as follows:

1. When used below 46GHz, it has excellent electrical performance; when used below 18GHz, its electrical performance is superior to that of SMA connectors.

2. It is compatible with existing SMA and APC-3.5 connectors in terms of electrical and mechanical performance.

3. The assembly technology is similar to that of SMA connectors, and a complete set of assembly tools is available, which not only ensures the assembly accuracy of the connector but also makes the assembly work of the connector easier to complete.

4. High operational reliability: Since the K-type connector has 4 slots in the jack, resulting in good elasticity, and the insertion force is only 0.5 pounds (2.224N), the wear of the inner conductor of the K-type connector can be greatly reduced, and the reliability is improved by about 12 times. At the same time, the wall thickness of the K-type connector conductor is 4 times that of the SMA connector, so the reliability of the K-type connector is improved by about 30 times compared with the SMA connector.

5. Lower price, more cost-effective in use.

II. Introduction to the Characteristics of 2.4mm Connectors

The characteristics of 2.4mm connectors are also very prominent, mainly including the following points:

1. No higher-order modes are generated up to 50GHz;

2. High-performance interface up to 50GHz;

3. Good durability, repeatability, and damage resistance;

4. Performance is superior to the currently widely used SMA connectors and APC3.5 connectors;

5. Same strict tolerances as APC3.5 connectors;

6. Does not damage the jack contact during normal operation;

7. Adopts metric design.

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