April 18, 2025

Waveguide pressure windows typically withstand 50-100 psi differential pressure when constructed with 0.060″ thick alumina ceramic (Al₂O₃) for X-band (8-12 GHz) applications, exhibiting less than 0.05 dB insertion loss. For harsh environments, 0.090″ beryllia (BeO) windows handle 150+ psi with superior thermal conductivity (330 W/mK), maintaining VSWR <1.1:1 across 10% bandwidth. Lifetime Testing Last year’s […]

The thickness of waveguide shims depends on the required frequency adjustment and flange type, typically ranging from 0.001″ to 0.020″ (0.025-0.5mm) for standard WR-90 waveguides. For precise impedance matching at X-band (8-12GHz), use 0.004″ brass shims to compensate for λ/4 wavelength gaps, ensuring VSWR remains below 1.2:1. Always measure flange separation with micrometer calipers and