High frequency swivel joints include coaxial swivel joints, waveguide swivel joints, and coaxial waveguide swivel joints. They are also known as high frequency slip rings and RF slip rings. High-frequency swivel couplings are specifically designed to carry high-speed serial digital signals such as high-definition, RF and microwave signals. The slip ring series supports single and multi-channel transmission of high-frequency signals. There are also hybrid solutions that support hybrid transmission of high frequency signals with control signals, communication signals, power signals and fluidics.