Design and Fabrication of Wideband Probe for Efficient Near Field Measurement

근역장의 효율적 측정을 위한 광대역 프로브의 설계 및 제작

  • Kim Joung-Myoun (Antenna Technology Research Team, ETRI) ;
  • Moon Jung-Ick (Antenna Technology Research Team, ETRI) ;
  • Yun Je-Hoon (Antenna Technology Research Team, ETRI) ;
  • Jeon Soon-Ik (Antenna Technology Research Team, ETRI) ;
  • Kim Nam (School of Electrical & Computer Engineering, Chungbuk National University)
  • 김종면 (한국전자통신연구원 안테나기술연구팀) ;
  • 문정익 (한국전자통신연구원 안테나기술연구팀) ;
  • 윤재훈 (한국전자통신연구원 안테나기술연구팀) ;
  • 전순익 (한국전자통신연구원 안테나기술연구팀) ;
  • 김남 (충북대학교 전기전자컴퓨터공학부)
  • Published : 2006.09.01

Abstract

In this paper, we designed and fabricated the wideband probe with double ridged waveguide for Near-field Measurement. An exponential taper ridge in the rectangular waveguide was implemented for wideband impedance matching. It has wideband characteristics and its measured impedance bandwidth ratio is approximately 2.2:1 from 8.2 GHz to 18 GHz for $VSWR\leq2.2$. It maintains about the same radiation pattern over the entire bandwidth and has more than 4.5 dBi peak radiation gain. Our designed probe was applied to near-field measurement. A good agreement has been found between simulated and measured results.

본 논문에서는 근역장 측정에 사용되는 이중 리지드 도파관 구조 광대 역 프로브를 설계 및 제작하였다. 광대역 임피던스 정합을 위해 구형 도파관 내에 지수함수 테이퍼 리지를 삽입시킨 구조를 이용하여 구현하였다. 프로브는 $VSWR\leq2.2$를 기준으로 하한 주파수 8.2 GHz에서 상한 주파수 18 GHz까지 2.2:1의 대 역비를 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.

Keywords

References

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