Abstract

AbstractWe describe a novel millimeter wave antenna based on sapphire substrate. An infrared transparent millimeter wave antenna and the characterization of its radiation pattern, gain, main frequency, and dielectric infrared transmission were reported. The proposed antenna was constructed from several infrared transparent dielectric materials with thin gold film array elements using a photolithographic process. Several single‐layer infrared‐transparent substrates were stacked. As a infrared transparent window, the antennas have applications in multimode communications, navigation, and detection, particularly for millimeter wave and infrared wavelength in a common aperture system.

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