다층 기판을 적용한 유도-모드 공진 필터의 향상된 THz 투과율

Abstract

This paper focuses on the improvement of the filter performance by applying multi-layer to the conventional GMR(guided-mode resonance) filter. The conventional GMR filter has a disadvantage in that the resonance depth of the transmission wave is reduced due to the loss of the incident wave generated by the filter. In order to overcome these disadvantages, we applied the multi-layer to the conventional GMR filter. Here, the multi-layer means that the PET film, which acts as a waveguide in the GMR filter, is stacked alternately with the air-layer and the thinner PET film. And the total thickness of the conventional PET film and the multi-layered PET film including the air layer is the same. This multi-layered GMR filter was measured using THz-TDS and compared with the experimental results of the conventional GMR filter. In addition we have experimented and analyzed the GMR filter with multi-layers in three different types. Since each type has different characteristics, it can be applied appropriately according to the situation.