The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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A UWB Antenna with the Adjustable Second Rejection Band Using a SIR

SIR을 이용한 제 2저지 대역 제어 가능 UWB 안테나

  • Choi, Hyung-Seok (Dept. of Electrical and Electronics Engineering, College of IT, Kangwon National University) ;
  • Choi, Kyung (Dept. of Electrical and Electronics Engineering, College of IT, Kangwon National University) ;
  • Hwang, Hee-Yong (Dept. of Electrical and Electronics Engineering, College of IT, Kangwon National University)
  • 최형석 (강원대학교 IT대학 전기전자공학부) ;
  • 최경 (강원대학교 IT대학 전기전자공학부) ;
  • 황희용 (강원대학교 IT대학 전기전자공학부)
  • Received : 2012.05.25
  • Accepted : 2012.08.27
  • Published : 2012.09.30
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Abstract

In this paper, a UWB antenna using a SIR(Step Impedance Resonator) that eliminate signal interference at 5 GHz WLAN as the first rejection band and adjust the second rejection band is proposed. Unlike the unit impedance resonator, the second harmonic of SIR is decided according to step impedance. Therefore, To adjust the second rejection band, SIR is applied to UWB antenna. Also, the equivalent circuit of the antenna at first rejection band is presented and the equivalent modeling values of the SIR and the coupling value is obtained. The proposed antenna is satisfied to cover full UWB band with return losses less than -10 dB and has band rejection characteristic in 5 GHz WLAN band. The radiation patterns show +y directivity characteristics in H-plane and the group delay variations are within 1.0 ns.

본 논문에서는 SIR(Step Impedance Resonator)을 이용하여 제 1저지 대역인 5 GHz WLAN 대역의 신호 간섭을 제거하며 제 2저지 대역을 제어할 수 있는 UWB 안테나를 제안하였다. SIR은 단일 임피던스 공진기와는 다르게 Step Impedance의 차이로 제 2고조파가 정해지는 특징이 있으므로 UWB 안테나에 적용하여 제 2저지 대역을 제어 가능하도록 하였다. 또한, 제 1저지 대역에서 안테나의 동작을 등가 회로로 나타내었으며, SIR의 등가 모델값 및 안테나와 SIR의 결합 값을 구하였다. 제안된 안테나는 UWB 전체 대역에서 -10 dB 이하의 반사 손실 특성과 5 GHz WLAN 대역에서 저지 특성을 나타내었다. 또한, H-평면에서 +y방향으로 지향성을 나타내며, 1.0 ns 이내의 군지연 변화 특성을 나타내었다.

Keywords

References

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