• Title/Summary/Keyword: defected microstrip structure (DMS)

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A Design of Power Divider Using Defected Microstrip Structure (DMS 선로를 이용한 전력분배기 설계)

  • Jeon, Yuck-Hwan;Kwon, Kyung-Hoon;Lee, Jae-Hoon;Lim, Jong-Sik;Han, Sang-Min;Ahn, Dal
    • Proceedings of the KAIS Fall Conference
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    • 2012.05b
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    • pp.471-473
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    • 2012
  • 본 논문은 DMS (defected microstrip structure) 선로를 이용한 전력분배기 설계에 대하여 기술하고 있다. DMS 선로는 마이크로스트립 선로의 패턴에 변형을 가하여 설계되는데, 이 때 부가적으로 발생하는 인덕턴스와 커패시턴스 효과에 의하여 선로의 특성 임피던스가 변하고, 또한 종래 주기구조에서의 특징들을 보인다. 이를 이용하면 초고주파 전송선로 구조의 무선회로들을 소형화할 수 있는데, 그 한 예로 본 논문에서는 윌킨슨 전력분배기를 소형화하는 설계에 대하여 기술한다. DMS 구조를 삽입하여 소형화된 전력분배기를 설계한 결과, 소형화된 분배기는 표준형 회로에 비하여 약 82%의 크기를 가지면서도 우수한 성능을 갖는다.

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Design and fabrication of a novel multilayer bandpass filter with high-order harmonics suppression using parallel coupled microstrip filter

  • Fathi, Esmaeil;Setoudeh, Farbod;Tavakoli, Mohammad Bagher
    • ETRI Journal
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    • v.44 no.2
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    • pp.260-273
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    • 2022
  • This study presents a novel multilayer structure of parallel coupled-line bandpass filtercentered at 2.42 GHz with a fractional bandwidth value of approximately 19.4%. The designed filter can suppress harmonics with an appropriate frequency response by incorporating different techniques based on the multilayer technique. A combination of different techniques such as radial microstrip stubs and defected ground structure (DGS) and defected microstrip structure techniques are employed to suppress harmonics up to 5f0. These techniques are used in two layers to suppress up to 5f0. In addition, in this study, the effects of different parameters, such as the width of slot-line DGS, the angle of diagonal line slots in the upper layer, and the air gap between the two layers on the filter performance, are investigated. To verify the correct circuit operation, the designed filter is implemented and tested. The measurement results of the proposed filter are compared with the simulation results.