What is used to couple waveguide components and sections to prevent RF leakage?

What is used to couple waveguide components and sections to prevent RF leakage?

• A. Air compressors
• B. Choke joints
• C. Polarizers
• D. Circulators

Answer: (B)

Choke joints are used. In waveguide systems, the seam where two sections meet can allow RF energy to leak out. A choke joint adds a quarter-wavelength RF choke around the joint, creating a very high impedance path to the RF at the operating frequency. This effectively blocks the current along the seam, keeping the energy inside the waveguide and preventing leakage. The other options don’t serve this sealing function: air compressors are for pneumatics, polarizers control polarization, and circulators route or isolate signals rather than sealing joints against leakage.

Choke joints are used. In waveguide systems, the seam where two sections meet can allow RF energy to leak out. A choke joint adds a quarter-wavelength RF choke around the joint, creating a very high impedance path to the RF at the operating frequency. This effectively blocks the current along the seam, keeping the energy inside the waveguide and preventing leakage. The other options don’t serve this sealing function: air compressors are for pneumatics, polarizers control polarization, and circulators route or isolate signals rather than sealing joints against leakage.