PANTECHNIK designs sliding RF contacts to be used in RF cavities under vacuum, but they can also be used in air.

These contacts allow mechanical movements with high density currents on. Sliding RF contacts are to be designed and built according to your RF and mechanical required performances.    

As an example we give:
Frequency: 60 MHz Max.
Linear RF current: 55 A/cm
Mechanical tolerances: ± 0.4 mm

References: GANIL / SPIRAL and Bunchers
RF resonators
JET fine tuners
Lacassagne Center (NICE) medical cyclotron.

sliding RF contact