Abstract
본 논문에서는 새로운 초광대역 마이크로스트립 선로-suspended 스트립 선로(SSL) 전이 구조를 제안하였고, 이 전이 구조를 이용하여 저손실의 높은 선택도를 갖는 여파기를 구현할 수 있음을 보여주었다. 제안된 전이구조는 광대역의 특성을 가지고 있으므로, SSL 여파기의 설계를 간단하게 할 수 있게 하고, 구현 시 별도의 튜닝이 필요 없음을 보여주었다. SSL 여파기 구현의 예로서 SSL 저역 및 고역 통과 여파기를 각각 구현하고, 이를 연결함으로써 2.3~10.5 GHz 대역에서 1.2 dB 이하의 적은 삽입 손실을 가지고, 또한 고선택도를 가지는 대역 통과 여파기를 구현한 것을 보여주고 있다. In this paper, a novel ultra-wideband microstrip-to-suspended stripline(SSL) transition is proposed, and SSL filters with low-loss and high selectivity have been realized using this transition. Since the proposed transition has low-loss and wide bandwidth characteristic, the design procedure of SSL filters become simplified. Additionally, the designed filters do not require extra time-consuming tuning. As design examples, SSL low-pass and high-pass filters have been implemented, and a implemented bandpass filter with connection of the low and high-pass filters performs 2.3~10.5 GHz bandwidth with less than 1.2 dB insertion loss and high selectivity.
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