Waveguide Rotary Joints

https://www.dolphmw.com/products/waveguide-rotary-joints/
Waveguide rotary joint mainly is for microwave communications to connect different types of waveguides components. Electrical continuous performance is achieved by a chokes to eliminate metal contacts in rotary location. It is used to transmit RF signals between stationary and movable parts of a system. During operation, a stationary RF line needs to be connected to moving components of a system while rotary Joints allow these types of connections with low losses and minimal variation in performance while they are rotating. These rotary joints have waveguide interface on both input and output port. One is rotated while the other one is fixed. In addition, rotary joint operating frequency is limited by the waveguide size.