I Type Waveguide Rotary Joint

The Type I Waveguide Rotary Joint (In-line Straight Waveguide Rotary Joint, WRJI) is a single-channel, in-line coaxial microwave mechatronic passive component. Both waveguide ports are perfectly collinear with the mechanical rotation axis. It serves as the core rotary transmission component for feeding links in radar, satellite communication, and TT&C turntable systems.

Adopting a non-contact λ/4 choke sealing structure, it enables stable microwave signal transmission with low insertion loss and low VSWR during 360° infinite continuous rotation. With no metal friction contact, no cable winding and no signal interruption, it features the best electrical performance, shortest axial length and highest power capacity among Type I / L / U series waveguide rotary joints.

Overall Structure

Port Configuration: In-line straight layout with rectangular waveguide at both ends. The axes of input and output waveguides are completely concentric with the rotating spindle.
Internal Composition: Fixed-end rectangular-to-circular transition, rotary circular waveguide cavity, high-precision λ/4 choke ring, high-rigidity precision bearing assembly, and enclosed housing.
Mechanical Support: Double-row high-precision wear-resistant bearings ensure full-angle rotational concentricity, low runout and long service life.

Specifications