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A Compact C-Band Semi-Lumped Lowpass Filter with Broad Stopband Using a Chip Inductor

칩 인덕터를 사용하여 광대역 저지 특성을 갖는 소형 C-밴드 Semi-Lumped 저역 통과 여파기

  • Jang, Ki-Eon (School of Electrical Engineering and Computer Science, Kyungpook National University) ;
  • Lee, Gi-Moon (Precision-Guided Munitions System Integration Department, Hanwha Corporation) ;
  • Kim, Ha-Chul (Department of Electrical Engineering, Republic of Korea Naval Academy) ;
  • Choi, Hyun-Chul (School of Electrical Engineering and Computer Science, Kyungpook National University)
  • 장기언 (경북대학교 전자전기컴퓨터학부) ;
  • 이기문 ((주)한화 체계종합부) ;
  • 김하철 (한국해군사관학교 전기전자공학부) ;
  • 최현철 (경북대학교 전자전기컴퓨터학부)
  • Received : 2012.06.26
  • Accepted : 2012.12.05
  • Published : 2012.12.31

Abstract

The C-band semi-lumped lowpass filter with broad stopband and compact size characteristic using chip inductor is proposed. To provide an additional attenuation pole in stopband by SRF, a separable inductor is added to proposed structure, and it has broad stopband characteristic. The third order elliptic function lowpass filter with chip inductor(L: 9.1 nH, SRF: 5.5 GHz, Q: 25) has insertion loss of 0.38 dB, cutoff frequency of 920 MHz, broad stopband(below 20 dB) of 1.43~7.8 GHz and the size is reduced 37.4 % compared to distributed inductor.

Keywords

Elliptic Function Lowpass Filter;Chip Inductor;Self Resonance Frequency

Acknowledgement

Supported by : 경북대학교

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