Journal of the Institute of Electronics and Information Engineers (전자공학회논문지)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Compact UWB Band-pass Filter with Open-Stub Using Impedance Mismatching and SIR

임피던스 부정합 및 SIR을 적용한 개방형 광대역 소형 스터브 대역통과 여파기

  • 이원석 (동양미래대학교 전기전자통신공학부) ;
  • 윤기철 (RFIC 연구센터 광운대학교)
  • Received : 2014.04.17
  • Accepted : 2014.06.05
  • Published : 2014.06.25
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Abstract

In this paper, the UWB (Ultra Wide Band) band-pass filter (BPF) with compact-size using impedance mismatching in transmission line and SIR (Stepped Impedance Resonator) instead of open stubs is presented. The proposed BPF have 103 % of bandwidth and 11.2 GHz of center frequency, respectively. In additional, the operation frequencies of the suggested BPF are 4.8 GHz to 16 GHz. In this structure, the length of the transmission line is reduced to half compared with the original one by impedance mismatching technique with low frequency band (sub harmonics) and harmonic components. Also, the open stub can be used for SIR due to reduced size. Experimental results show that the insertion and return losses are 0.35 dB and 15.1 dB, respectively and the filter size is $8.92{\times}10.6mm^2$. The proposed BPF is in good agreement.

본 논문은 여파기의 크기를 축소시키고 대역폭을 넓히기 위해 전송선로 및 개방형 스터브(stub)에 임피던스(impedance) 부정합과 SIR(Stepped Impedance Resonator)을 적용하여 소형화된 초광대역 개방형 스터브 대역통과 여파기에 대해 제안을 한다. 제안된 대역통과 여파기의 대역폭 및 중심 주파수는 각각 103 % 및 11.2 GHz이고 통과대역 주파수는 4.8 GHz~16 GHz이며 저역 주파수 대역과 고조파를 적용하여 임피던스 부정합을 사용했을 때, 제안된 구조의 전송선로 길이는 일반적인 전송선로 길이 보다 약 절반의 수준으로 줄어들게 된다. 또한 개방형 스터브의 크기를 줄이기 위해서는 SIR을 사용할 수 있으며 실험결과에서 삽입 및 반사손실은 각각 0.35 및 15.1 dB이고 여파기의 크기는 $8.92{\times}10.6mm^2$이므로 만족한 결과를 얻을 수 있었다.

Keywords

References

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