Waveguide pressure windows are used to seal waveguides at high pressure and prevent contaminants from entering the system.

Waveguide pressure windows are designed to isolate pressurized sections from the non-pressurized sections in the waveguide systems.

There are many different types of waveguide pressure windows. Examples include standard waveguide window, double-ridged waveguide pressure windows, and solderable glass waveguide pressure windows.

A standard waveguide window provides isolation between vacuum environment and normal atmosphere and is available up to 50 GHz WG-23 (WR22).

Double-ridged waveguide pressure windows increase the power handling capacity and prevent corrosion in high humidity and dusty conditions by isolating a section of transmission line from the environment.

Other waveguide pressure windows are commonly available.