Slip ring assembly used to transmit radar intermediate frequency (tens of megahertz) signals and energy. This type of slip ring has a higher frequency and needs shielding. Ordinary slip rings can also be used to transmit signals up to 12 MHZ. One loop is connected to the center conductor, and the outer layer of one loop cable is used as a shielding ring. Coaxial shielded slip rings are usually used to transmit signals above 12 MHZ. The cross section of the slip ring is a groove shape, which is essentially a rectangular coaxial conductor. There is also a capacitive intermediate frequency slip ring in which the central conductor is ring-shaped and supported in the shielding layer by an insulating pad. There is a gap between the rotating part and the fixed part, which are not in contact with each other. When the antenna rotation range is limited, the slip ring can be used instead of cable winding device.