본 논문에서는 근역장 측정에 사용되는 이중 리지드 도파관 구조 광대역 프로브를 설계 및 제작하였다. 광대역 임피던스 정합을 위해 구형 도파관 내에 지수함수 테이퍼 리지를 삽입시킨 구조를 이용하여 구현하였다. 프로브는 VSWR≤2.2를 기준으로 하한 주파수 8.2 GHz에서 상한 주파수 18 GHz까지 2.2:1의 대역비를 갖는 광대역 특성을 보였으며 대역폭 내에 왜곡 없는 안정된 복사 패턴을 가지면서 4.5 dBi 이상의 이득을 가졌다. 설계한 광대역 프로브를 이용하여 근역장 측정 시스템을 적용하여 정확한 측정 결과를 얻을 수 있었다.
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