WCN02U-02 is CENO wave guide Rotary Joint with 2 channels CPRG 187G. A wave guide is a structural element used to guide the transmission of high-frequency electromagnetic waves (such as microwaves or millimeter waves), usually a hollow metal tube or dielectric structure. Its working principle is based on the reflection and propagation characteristics of electromagnetic waves within a closed or open boundary. It can efficiently transmit electromagnetic energy in a specific frequency band while reducing transmission loss and radiation leakage.