Skin effect of RF coaxial connector:
      In high frequency applications, RF coaxial connectors also produce some prominent phenomena, such as skin effect: due to electromagnetic induction, alternating current tends to transmit on the inner surface of the outer conductor of the connector and the outer surface of the inner conductor. The higher the frequency, the more obvious the trend. When the frequency is very high, 95% of the current is transmitted within three skin depths on the inner surface of the outer conductor of the connector and the outer surface of the inner conductor

频率(Hz)	趋肤深度(mm)	频率(Hz)	趋肤深度(mm)
50	9.3	1G	0.002
1M	0.07	1000G	0.00007

        It can be seen that when the RF coaxial connector is applied to the high frequency, the current is concentrated on the inner surface of the outer conductor and the outer surface of the inner conductor, so the quality requirements for the inner surface of the outer conductor and the outer surface of the inner conductor of the connector are very high, especially for the electroplating layer, This is why silver plating is more common for RF coaxial connectors than other connectors (except for power connectors, which also have high requirements for conductivity) - silver is the best conductivity of all metals

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