Fabrication of high dielectric constant and low loss X band ceramic waveguide window for High power applications

Broadband low‐cost waveguide windows for millimetre‐wave components

“…One is a pillbox type [1][2][3][4][5]. The second is a resonance type [6,7]. There are also some other special ways, such as ultra-nano-crystalline diamond (UNCD) film vacuum windows [8] and the multilayer waveguide window [9].…”