The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
권호 표지
DOI QR코드

DOI QR Code

Compact Triple-Mode Bandpass Filter Using a Cylindrical Dielectric Resonator

원통형 삼중모드 유전체 공진기를 이용한 대역 통과 여파기의 설계

  • 장건호 ((주)케이엠더블유 통신연구소) ;
  • 박남신 ((주)케이엠더블유 통신연구소) ;
  • 김병철 ((주)케이엠더블유 통신연구소) ;
  • 이돈용 ((주)케이엠더블유 통신연구소) ;
  • 원정희 ((주)케이엠더블유 통신연구소) ;
  • 왕욱광 ((주)케이엠더블유 통신연구소)
  • Received : 2014.09.24
  • Accepted : 2014.12.22
  • Published : 2015.01.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, the design of a compact triple-mode bandpass filter using a high-Q cylindrical dielectric resonator is proposed. In detail, the triple $TE_{01{\delta}}$ modes along three orthogonal axes are used and novel coupling structure in the metallic enclosure is adopted to introduce the coupling between the resonant modes. Due to the cross coupling, the proposed bandpass filter has an asymmetric frequency response with flexible three transmission zeros, one of which can be located very close to the passband edge to provide an extremely sharp skirt characteristic with low insertion loss. The proposed filter is about 60 % miniaturized compared with conventional single-mode dielectric resonator filter. The proposed bandpass filter design is validated by the circuit and 3D EM simulations and measurements compared to the target specifications.

본 논문에서는 삼중 $TE_{01{\delta}}$ 모드를 가지는 세라믹 유전체 공진기와 새로운 결합 네트워크를 이용한 대역 통과 여파기를 제안한다. 원통형 유전체 공진기의 삼중 공진 모드를 이해하고, 모드 간 결합분석을 통해 900 MHz 대역의 대역 통과여파기의 설계를 보인다. 유전체 공진기의 높은 품질계수와 제어 가능한 3개의 전송 영점을 통해 우수한 삽입 손실과 감쇄 특성을 얻을 수 있으며 기존 단일 모드 유전체 공진기를 이용한 여파기와 비교하여 60 %의 소형화를 달성하였다. 제안된 대역 통과 여파기 및 설계방법은 회로 해석 및 3차원 모의실험과 측정을 통하여 설계목표와 비교 분석되어 그 타당성을 증명하였다.

Keywords

References

  1. J. F. Liang, W. D. Blair, "High-Q TE01 mode DR filters for PCS wireless base stations", IEEE Trans. Microwave Theory & Tech., vol. 46, no. 12, pp. 2493-2500, Dec. 1998. https://doi.org/10.1109/22.739239
  2. M. Hoft, "Bandpass filter using TM-mode dielectric rod resonators with novel input coupling", in IEEE MTT-S Int. Microw. Symp. Digest, Boston, MA, pp. 1601-1604, 2009.
  3. A. Ghosh, N. Mangalvedhe, R. Ratasuk, B. Mondal, M. Cudak, E. Visotsky, T. A. Thomas, J. G. Andrews, P. Xia, H. S. Jo, H. S. Dhillon, and T. D. Novlan, "Heterogeneous cellular networks: From theory to practice", Communications Magazine, IEEE, vol. 50, no. 6, pp. 54-64, Jun. 2012.
  4. Wai-Cheung Tang, S. K. Chaudhuri, "A true ellipticfunction filter using triple-mode degenerate cavities", Microwave Theory and Techniques, IEEE Transactions on, vol. 32, no. 11, pp. 1449-1454, Nov. 1984. https://doi.org/10.1109/TMTT.1984.1132870
  5. R. R. Bonetti, A. E. Williams, "Application of dual TM modes to triple- and quadruple-mode filters", Microwave Theory and Techniques, IEEE Transactions on, vol. 35, no. 12, pp. 1143-1149, Dec. 1987. https://doi.org/10.1109/TMTT.1987.1133829
  6. V. Walker, I. C. Hunter, "Design of triple mode $TE_{01{\delta}}$ resonator transmission filters", IEEE Microwave and Wireless Components Letters, vol. 12, pp. 215-217, Jun. 2002. https://doi.org/10.1109/LMWC.2002.1009999
  7. H. Salehi, T. Bernhardt, T. Lukkarila, and S. Amir, "Analysis, design and applications of the triple-mode conductor- loaded cavity filter", Microwaves, Antennas & Propagation, IET, vol. 5, no. 10, pp. 1136-1142, Jul. 2011. https://doi.org/10.1049/iet-map.2010.0020
  8. N. Park, D. Lee, B. Kim, J. Won, I. Na, G. Jang, Y. Cho, X. Wang, and S. Yun, "Triple-mode filter using a spherical dielectric resonator and coupling structures", Microwave Journal, May 2014.
  9. S. J. Fiedziuszko, I. C. Hunter, T. Itoh, Y. Kobayashi, T. Nishikawa, S. N. Stitzer, and K. Wakino, "Dielectric materials, devices, and circuits", Microwave Theory and Techniques, IEEE Transactions on, vol. 50, no. 3, pp. 706-720, Mar. 2002. https://doi.org/10.1109/22.989956
  10. Darko Kajfez, Pierre Guillon, Dielectric Resonators, ISBN 0-89006-201-3, 1986 Artech House Dedham, MA.
  11. I. C. Hunter, Theory and Design of Microwave Filters, IEE, London, UK: 2001.
  12. J. Myung, S. Yun, N. Park, D. Lee, B. Kim, J. Won, I. Na, G. Jang, and X. Wang, "Resonant characteristics of triple-mode dielectric resonators", JEES, vol. 14, no. 1, pp. 9-14, Mar. 2014. https://doi.org/10.5515/JKIEES.2014.14.1.9
  13. Jia-Sheng Hong, M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, Wiley-Interscience, 2001.
  14. R. J. Cameron, C. M. Kudsia, and R. R. Mansour, Microwave Filters for Communication Systems, Ch. 7, 245, Wiley, Hoboken, NJ, 2007.
  15. S. Amari, U. Rosenberg, and J. Bornemann, "Adaptive synthesis and design of resonator filters with source/ load-multiresonator coupling", Microwave Theory and Techniques, IEEE Transactions on, vol. 50, no. 8, pp. 1969, 1978, Aug. 2002.