Reduction of reflection loss from dielectric plate by reflection-phase control of frequency selective surface

The thickness of the dielectric plate is comparable with the wavelength, therefore, can not be neglected in high-frequency band. The reflections from the dielectric plate surfaces are canceled out of phase only when the thickness is identical to one half of the wavelength. However, they are not canceled in general and reflection loss is generated. Frequency Selective Surface (FSS) is equipped on one side of the dielectric plate. Reflection loss can be reduced by controlling the reflection phase of the FSS to be opposite phase to the reflection phase of the other dielectric surface. The control range of the reflection phase of the FSS is investigated in this work. The basic operation to reduce the reflection loss is demonstrated in this paper.