Abstract

At millimeter waves, travelling wave dielectric windows are advantageous over commonly used resonant ones due to the higher power capability. An attractive method to compensate the wave reflections from vacuum-dielectric and dielectric-vacuum boundaries is using anti-mirror reflection gratings (Fig. 1) [1]. In this paper, the power loss due to the finite cross-section of the wave beam and the frequency mismatch relative to the resonant value are calulated for the latter type of window.

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