waveguide rotary joint

{{technical|date=December 2016}}

Waveguide rotary joint are required in PSR-, SSR- and/or IFF-Radar sensors to couple the RF-signals that are transmitted by PSR-, SSR- and/or IFF-Radar sensors transmitter and the from the continiously by 360° rotating PSR-, SSR- and/or IFF-Radar-sensors-antennas.The RF-signals can be provided to the Waveguide rotary joint either by waveguides or coaxial-cables.

Depending on the required number on channels, e.g. for different Antennadiagrams, waveguide rotary joints can have up to nine channels.{{Cite book |url=https://www.spinner-group.com/images/download/kataloge_flyer/SPINNER_ATC.pdf |title=SPINNER, Air Traffic Control, Superior Rotary Joints for ATC, Edition C.1/2023}}

Waveguide rotary joints are used in PSR-, SSR- and/or IFF-Radar sensors to connect two different types of RF waveguides. Because coaxial parts are symmetrical in ø direction, free rotation without performance degradation is accomplished. In the rotating part, electrical continuity is achieved by λ/4-chokes eliminating metal contacts. The Rotary Joints can have both waveguide ports at a right angle to the rotational axis, "U-style", one waveguide port at a right angle and one in line, "L-style" or both waveguide ports in line. "I-style". Waveguide Rotary Joint modules are available for all frequency bands. [http://www.ecplaza.net/tradeleads/seller/4818912/waveguide_rotary_joints.html www.ecplaza.net "WAVEGUIDE ROTARY JOINTS"] Common materials for waveguide rotary joints include aluminum, brass, bronze, copper, and silver.{{Cite journal |last=Zhiqiang Zhang, Kaibin Xue, Zibing Weng |title=A High-Power Radar Rotary Joint |journal=Frontiers in Physics |date=2022 |volume=10 |doi=10.3389/fphy.2022.948570 |doi-access=free }}