Which waveguide component has a mechanical stop mounted on its base to limit movement to each extremity of travel?

Which waveguide component has a mechanical stop mounted on its base to limit movement to each extremity of travel?

• A. RF switch
• B. Radio frequency (RF) switch
• C. Choke joint
• D. Polarizer

Answer: (B)

Mechanical stops at the base are used to limit how far the moving part inside a device can travel, preventing damage and ensuring repeatable positions. In a waveguide RF switch, the signal path is changed by moving a vane or contact inside the housing. That moving element is driven by a mechanism mounted on the base, and end-of-travel stops keep it from over-extending and help it settle into a defined position at each extremity. A choke joint is a passive feature used to suppress RF leakage and doesn’t involve a moving part with travel limits. A polarizer adjusts the polarization by rotating an element, which may have limits but the described base-mounted stop for extremity travel is characteristic of the RF switch’s actuator mechanism.

Mechanical stops at the base are used to limit how far the moving part inside a device can travel, preventing damage and ensuring repeatable positions. In a waveguide RF switch, the signal path is changed by moving a vane or contact inside the housing. That moving element is driven by a mechanism mounted on the base, and end-of-travel stops keep it from over-extending and help it settle into a defined position at each extremity. A choke joint is a passive feature used to suppress RF leakage and doesn’t involve a moving part with travel limits. A polarizer adjusts the polarization by rotating an element, which may have limits but the described base-mounted stop for extremity travel is characteristic of the RF switch’s actuator mechanism.