Discussion on Power Capacity of RF Coaxial Connectors（3）

Contact Resistance of RF Connector

The contact resistance of the RF connector refers to the resistance of the contact points of the inner and outer conductors when the connector is inserted, which is generally in the milliohm level, and the value should be as small as possible. It mainly evaluates the mechanical properties of the contact parts, and the influence of bulk resistance and solder joint resistance should be removed during measurement. The existence of contact resistance will cause the contacts to heat up, making it difficult to transmit high-power microwave signals.

The same type of joint material, the use of different materials, the power tolerance will also be different of RF Coaxial Connector.

Summarize of Coaxial Connector

The power tolerance mentioned above refers to the continuous wave power. If the input power is pulse, the power tolerance is even higher. Since the above reasons are all uncertain factors and will affect each other, there is no formula for direct calculation, so the power capacity value index is generally not given for individual connectors, only in the technical indicators of microwave passive devices such as attenuators and loads. Calibration power capacity and instantaneous (less than 5μs) maximum power index. Note that if the matching of the transmission process is not good and the standing wave is too large, the power on the coaxial connector may be large input power. Generally for safety reasons, the power loaded on the joint should not exceed 1/2 of its limit power.

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Related Articles:

1.Discussion on Power Capacity of RF Coaxial Connectors(1)

2.Discussion on Power Capacity of RF Coaxial Connectors(2)