Journal of information and communication convergence engineering

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Design of 5-order Interdigital Band-Pass Filter

  • Phally Phan (Department of Information and Convergence Technology, Soonchunhyang University) ;
  • Donghoon Kang (Department of Information and Convergence Technology, Soonchunhyang University) ;
  • Dal Ahn (Department of Electrical Engineering, Soonchunhyang University) ;
  • Youna Jang (Department of Information and Convergence Technology, Soonchunhyang University)
  • Received : 2024.02.13
  • Accepted : 2024.07.23
  • Published : 2024.09.30
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Abstract

This study proposed an interdigital band-pass filter based on the microstrip transmission line. When designing a conventional structure for an interdigital filter based on the characteristics of the 5th order transmission line, seven resonators are required. By changing the impedance of the resonator adjacent to the feed line, the proposed interdigital band-pass filter was designed to reduce the number of resonators compared to conventional interdigital band-pass filters. Consequently, the resonator order decreased, and return and insertion losses become comparable to that in case of a conventional interdigital filter design. The proposed band-pass filter was designed with a center frequency of 2.75 GHz and a bandwidth of 1.5 GHz. Furthermore, based on various transmission characteristics such as group delay and coupling coefficient, two band-pass filters were designed, compared, and analyzed.

Keywords

Acknowledgement

This research was supported by the Ministry of Science and ICT (MSIT), Korea, under the ICT Challenge and Advanced Network of HRD (ICAN) program (IITP-2024-2020-0-01832) supervised by the Institute of Information & Communications Technology Planning & Evaluation (IITP). Additional support was received from the Soonchunhyang University Research Fund.

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