본 논문에서는 마이크로파대 광대역 다단 평면형 전력분배기의 설계방법과 구조를 새로이 제안하였다. 제시된 마이크로파 광대역 전력분배기의 설계과정은 평면형 다단 3-포트 하이브리드와 도파관트랜스포머 설계로 구성되었다. 다단 전력분배기는 최적화된 λ/4 트랜스포머 설계이론에 근거를 두고 있다. 두 인접 출력포드의 광대역 격리 특성을 얻기위해, 기모드 등기회로는 저항 같은 손실소자를 사용하여 정합되어야 한다. 기모드 정합소자 값을 계산하기 위한 설계공식은 단일 종단 여파기 설계이론으로부터 유도하였다. 도파관 트랜스포머단의 형상은 하우징 금속전계벽의 영향으로 인한 도파관 모드와 같은 고차모드의 전파를 억제하기 위해 설계되었다. 따라서, 설계된 각각의 도파관 트랜스포머단에서는 제안된 마이크로파 광대역 전력 분배기의 동작주파수 영역에서 모두 감쇄모드(evanescent mode)로 동작하여야 한다. 본 논문에서는 제안된 마이크로파 광대역 전력분배기의 검증을 위해, 다단 전력 분배기의 시뮬레이션과 실험 결과들을 제시하였다. 시뮬에이션과 실험 결과는 다단 전력분배기의 우수한 성능을 보여준다.
KSP Keywords
evanescent mode
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