What waveguide component has a mechanical stop on its base to limit movement to travel extremities?

What waveguide component has a mechanical stop on its base to limit movement to travel extremities?

• A. Radio frequency (RF) switch
• B. Antenna coupler
• C. Circulator
• D. Polarizer

Answer: (A)

Movement-limited mechanisms are used where a part moves to switch or route signals, and a mechanical stop defines the exact end positions to protect the device and ensure reliable operation. In waveguide systems, the RF switch has a movable contact or blade that shifts between ports to route the signal. The base includes a mechanical stop that caps how far this element can travel, ensuring precise, repeatable positions and preventing over-travel that could cause misalignment, arcing, or mechanical damage. The other components are primarily static or have no purpose-built end stops for moving parts: a coupler tunes impedance with fixed or manually adjustable elements, a circulator is a passive non-reciprocal device, and a polarizer mainly controls polarization with little to no end-stop movement in normal operation.

Movement-limited mechanisms are used where a part moves to switch or route signals, and a mechanical stop defines the exact end positions to protect the device and ensure reliable operation. In waveguide systems, the RF switch has a movable contact or blade that shifts between ports to route the signal. The base includes a mechanical stop that caps how far this element can travel, ensuring precise, repeatable positions and preventing over-travel that could cause misalignment, arcing, or mechanical damage. The other components are primarily static or have no purpose-built end stops for moving parts: a coupler tunes impedance with fixed or manually adjustable elements, a circulator is a passive non-reciprocal device, and a polarizer mainly controls polarization with little to no end-stop movement in normal operation.