The SMC-060D200 from Scientific Microwave Corporation is a Double-Ridge Waveguide Pressure Window that operates from 2 to 4.8 GHz. It can handle a pressure of up to 40 Psi (Quartz) / 30 Psi (Kapton and Teflon) and has a VSWR of 1.15:1. This pressure window is available in a module with a WRD200 waveguide interface.
