Comparative Leakage of Transparent Conducting Film Etalon Windows and Standard Metal Grid Windows

摘要

Domestic microwave ovens have a door with a microwave attenuating metal grid observation window. Visibility of the oven contents, however, is greatly hampered by the grid. Windows with transparent conducting coatings has been suggested for many years, but are not commercially produced. Recently a low cost configuration based on commercially available glass panes coated with transparent conductive oxide coatings and arranged in an etalon configuration was presented, and the leakage using an optimized configuration was demonstrated to be less than with conventional windows. However the repeatability of the measurements was limited by magnetron drift and changing of the water load characteristics with heating. The objective of the present work was to compare the etalon and grid windows under comparable conditions.