By Tony Huang | 22 February 2023 | 0 Comments
What should we choose for the plating of RF Connector
The plating of Low PIM Connector
In applications sensitive to passive intermodulation (PIM), Raynool utilizes white bronze plating, a tin/zinc/ copper composite with a bright white finish. It offers the corrosion resistance of nickel and the Low PIM characteristics of silver plating.
Silver Plated Center: Silver Plated Connector is more expensive and is prone to tarnishing, but as it is the non-ferromagnetic Material, the performance is better than Nickel-plated connector, and is particularly good at minimizing PIM at high power levels.
White Bronze Plated Body: White Bronze Plated Body has better wear characteristics in harsh conditions and low insertion loss, Although Silver Plated has outstanding electrical characteristics, the defeats of the corrosive and tarnish effects of sliver oxide make white bronze plating a better choice in the body plated material.
Connector components are plated for electrical and environmental purposes.
Silver or white bronze is used for its high conductivity in order to significantly reduce contact junction resistance.
Gold does not oxidize in air and this makes it popular for use in spring contact junctions where high contact pressures are not attainable.
It is therefore important to ensure sufficient plating thickness
Typically, Type N and Din 7/16 will have silver plated contacts. Due to the skin effect, the RF current densities only reside within a few skin depths at the surface of the conductor.
It is therefore important to ensure sufficient plating thickness such that the majority of the current travels within the plating material. Approximately 98% of the current density travels within 4.6 skin depths. At 1 Ghz, on a silver plated surface, the skin depth is .002mm or 78 uin
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