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

대한전자공학회 (The Institute of Electronics and Information Engineers)
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복합 좌우향 전송선로를 이용한 UWB 대역통과 필터의 설계

Design of UWB Bandpass Filter using CRLH Transmission Line

  • 김기래 (신라대학교 전자공학과)
  • Kim, Girae (Dept. of Electronic Engineering, Silla University)
  • 투고 : 2013.07.15
  • 발행 : 2013.11.25
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초록

본 논문에서는 덤벨형 결함 접지면 구조를 갖는 복합 좌-우향(CRLH) 전송선로를 이용하여 초광대역 대역통과 여파기를 설계하였다. 결함 접지면 구조와 마이크로스트립 인터디지털 캐패시터를 이용하여 CRLH 전송선로를 구현하고 이것을 이용하여 필터를 설계하였다. CRLH 전송선로는 저역통과와 고역통과 필터의 복합적인 특성을 나타내는데, 그것들의 차단주파수를 잘 조절함으로써 초광대역의 대역통과 필터의 특성을 얻을 수 있다. UWB 필터 특성을 얻기 위해 1, 2, 4, 8 셀을 갖는 CRLH 전송선로에 대해 시물레이션하였고, 본 논문에서는 결과를 검증하기 위해 4 셀 구조의 UWB 필터를 설계 제작하였다. 측정된 결과는 시뮬레이션 결과와 일치하며 5GHz 중심주파수에서 88%의 넓은 대역폭을 갖는다.

A novel design method of ultra wideband bandpass filter using CRLH transmission line with Dumbell type DGS is presented in this paper. Defected Ground Structure and microstrip interdigital capacitor are used to design the ultra wideband (UWB) filter. CRLH transmission line has composite characteristics of low pass and high pass filter. As control of cutoff frequency of low pass and high pass response on CRLH transmission line, we can get characteristic of UWB filter. We designed and simulated for CRLH transmission lines with one, two, four, and eight cells. A UWB filter using four cells CRLH is designed and fabricated to verify the results. The characteristics of designed filter have center frequency of 5GHz and relative bandwidth of 88%.

키워드

참고문헌

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피인용 문헌

  1. Matching Element Sensitivity Analysis for the Operation of a Dual-band Power Amplifier with CRLH Transmission Lines vol.22, pp.4, 2013, https://doi.org/10.7471/ikeee.2018.22.4.1050