Subelement E: Antenna Systems- 5 Key Topics – 5 Exam Questions— Topic 43: Waveguides-2
Question 8-43E1
Element 8 (RADAR)A rotary joint is used to:
Explanation
A rotary joint provides a critical connection in microwave systems where continuous 360-degree rotation is required, such as with radar antennas or satellite tracking systems. It allows a stationary waveguide, carrying the signal from the transmitter/receiver, to connect to a waveguide section that is physically rotating with the antenna array. This prevents the waveguide from twisting, breaking, or experiencing signal loss due to mechanical stress, ensuring reliable signal transfer across the rotating interface.
Options A and B describe functions performed by waveguide bends, T-junctions, or waveguide switches, respectively, not rotary joints. Option D, while a rotary joint must maintain internal pressurization, describes a general function for various waveguide components, not the primary, unique purpose of a rotary joint.
Related Questions
8-42E5 Waveguide theory is based on the principals of:8-42E6 How is the signal removed from a waveguide or magnetron?8-43E2 Resistive losses in a waveguide are very small because:8-43E3 A right-angle bend in an X-band waveguide must have a radius greater than:8-43E4 To insert RF energy into or extract RF energy from a waveguide, which of the following would not be used?