What are used to couple waveguide components and sections to prevent radio frequency (RF) leakage?

Choke joints are specifically designed to couple waveguide components and sections while minimizing radio frequency (RF) leakage. They function by creating a high impedance barrier to the propagation of RF energy at unwanted frequencies, ensuring that the intended RF signals remain confined within the waveguide system. This is crucial in maintaining signal integrity and power levels over distances, as any leakage could lead to power losses and interference with other equipment.

The other options do not serve the same purpose as choke joints. Compressors, for instance, relate to the manipulation of gas or fluid systems rather than RF signal integrity. Radio frequency filters are more focused on allowing certain frequencies to pass while blocking others, but they do not specifically pertain to the physical coupling of waveguide components. Radio frequency thermocouples are used for temperature measurements and monitoring within RF systems, not for preventing RF leakage. Thus, choke joints are the correct choice for coupling waveguide components effectively while keeping RF energy contained.