Abstract
본 논문에서는 초광대역의 마이크로스트립-FGCPW 전이구조 설계를 제안하였다. 제안한 전이구조는 바닥면 그라운드의 변화를 통해 전계 및 임피던스 정합을 구현하였다. 등각 사상을 이용하여 전이구조를 해석하여 닫힌 형태의 수식을 제안하였으며, 제안한 수식은 상용 EM 시뮬레이터와 3.3 % 오차 범위의 정확성을 가짐을 확인하였다. 제작된 전이구조는 9~40 GHz 이상의 대역에서 1 dB 이하의 손실과 10 dB 이상의 반사손실을 가짐을 확인하였다. A new design for an ultra-wideband microstrip-to-FGCPW(Finite Ground Coplanar Waveguide) transition is presented. The proposed transition provides the electric field and impedance matching between adjacent transmission lines by ground shaping. The transition is designed on the analytical expressions of whole transitional structure. Conformal mapping is applied to obtain the characteristic impedance of FGCPW with bottom aperture within 3.3 % accuracy as compared with the EM-simulation results. As design example, the fabricated transition in back-to-back configuration provides insertion loss less than 1 dB per transition and return loss better than 10 dB for frequencies from 9 GHz to over 40 GHz.
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