Products / RF Rotary Joints

Waveguide and Coaxial Rotary Joints Assembly


Waveguide and Coaxial Rotary Joints are used for the transmission of power and signal between the locked and rotating parts of a radar or satcom system.

For more than 70 years EVERAXIS has designed and manufactured both single and multi channel Waveguide (WG) and Coaxial Rotary Joints .

Each time a new design is needed EVERAXIS will combine simulations in FEM software as well as labtests for optimal performance.

Individual high power Waveguide and Coaxial Rotary Joints are tested at maximum peak power before being shipped to the customer.

EVERAXIS Waveguide and Coaxial Rotary Joints are well known for their excellent isolation between channels.

A Coaxial and Waveguide Rotary Joint is the high power and signal bridge between the revolving and the stationary part of a radar or satcom system.

Since the inner conductor of the coaxial line is most often hollow, this will allow further coaxial cables to be put through the waveguide part to be connected to the coaxial modules when building multi-channel Rotary Joints.

The rotary joints can be U-shaped meaning have both waveguide ports at a ortagonal to the rotational axis, F or L shaped by having one waveguide port at a right angle and one in line OR I style with both waveguide ports in line.


EVERAXIS produce and design Waveguide and Rotary Joint modules for most frequency bands from L-band to Ku-band, including double ridge bands.

The Coaxial channel can be from DC to 40GHz design.

EVERAXIS Waveguide Rotary Joints are used where the following requirements are critical:

  •  High isolation for less interference between channels
  •  Low insertion loss to improve radar performance
  •  High power capability for maximizing radar range
  •  Long life and exellent durability

EVERAXIS Coaxial Rotary Joints have broad bandwidth and small dimensions.

The coaxial channels are contactless, choke coupled or contact based on high grade materials.