The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Design of the DGS cell for the improvement of the characteristics of a return loss at passband and an attenuation at stopband

통과대역 반사손실과 저지대역 감쇠특성 개선을 위한 DGS 셀의 설계

  • 조영빈 (경희대학교 전자공학과 마이크로파 연구실) ;
  • 전계석 (경희대학교 전자공학과 마이크로파 연구실)
  • Published : 2003.03.01
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Abstract

In this paper, We has proposed two DGS(Defected Ground Structure) resonators and designed the low-pass filter using the proposed DGS types. This structure consists of two rectangular slots, a ‘II type’ slot on the ground plane, and the stub at the transmission line. It has strong advantages that can vary the return loss at the passband freely and also can easily tune the attenuation pole frequency at the stopband. For enhancing the poor skirt property at the cutoff frequency of the Single Stub ‘II Type’ DGS cell, we have obtained the steep slope attenuation characteristic by combining the rectangular slot on both sides of the DGS. This type of the LPF with the proposed structure can be made more smaller than the existing filters and be used to find the various applications for eliminating the hamonics and spurious mode at WLL and the 2.4 GHz ISM band systems.

본 논문에서는 2가지 DGS 공진기를 제안하고 이를 이용한 저역통과 필터를 설계한다. 제안된 구조는 전송선로부분에 스터브가 존재하고 그 아래의 접지면에 구형 슬롯과 II자형 슬롯을 갖는 DGS셀 형태로써, 통과대역에서의 반사손실을 자유자재로 변화시킬 수 있으며, 저지대역에서의 감쇠극의 조정이 용이한 특징을 갖는다. 단일 스터브 II자형 DGS셀의 단점인 차단주파수에서의 스커트 특성을 개선하기 위하여 구형 슬롯을 양옆에 직렬 연결함으로써 매우 급격한 차단 특성을 얻을 수 있었다. 따라서 이 구조를 사용한 저역통과 필터는 기존 필터에 비해 초소형화가 가능하며, 부품 실장에서 유리하고, WLL 및 2.4㎓ ISM 대역의 하모닉 성분 및 불요파 제거 등 다양한 응용을 기대할 수 있다.

Keywords

References

  1. C.M.Bowden, J.P.Dowling, and H. O.Everitt, 'Development and Applications of Exhibiting Photonic Band Gaps,' J. Opt. Soc. Amer., vol. B10, pp..280, Feb. 1993
  2. Special Issues, Journal of Lightwave Technology, Vol.17, No.11, Nov. 1999
  3. Special Issues, IEEE Trans Microwave Theory Tech., Vo1.47, No.11, Nov. 1999
  4. T.Yun and K. Chang, 'One-Dimensional Photonic Bandgap Resonantors andTuned Resonators,' 1999IEEE MTT-S Digest, pp. 1629-1632, 1999
  5. R. Qiang, Y. Wang and D. Chen 'A novel Microstrip Bandpass Filter with Two cascaded PBG Structures,' 2001 IEEE AP-S Digest, pp.510-513, 2001
  6. J.P Kim and W.S. Park, 'Microstrip Lowpass Filter with Multislots on Ground', Electronics Letters, Vo1.37, No.25, 6 Dec. 2001
  7. M. Kahrizi, T. Sarkar and Z. Maricevic, 'Dynamic Analysis of a Microstrip Linea Perforated Ground Plane,' IEEE Trans. Microwave The ory Tech., Vo1.42, pp.820-825, May 1994
  8. X.Yi, P.Yeh and J.Hong, 'Photonic Bandgap Structure in Thin Film Waveguides,' SBMO/IEEE MTT-SIMOC '99 Proceedings, pp.451-453, 1999
  9. V. Radisic, Y. Qian, R. Coccioli and T.ltoh, 'Novel 2-D Photonic Bandgap Structure for Microstrip Lines,' IEEE Microwave and GuidedWave Letters, VoI.8, No.2, pp.69-71, Feb. 1998 https://doi.org/10.1109/75.658644
  10. ChuI-Soo Kim, Jun-Seok Park, Dal Ahn, Jae-Bong Lim, 'A Novel1-D Periodic Defected Ground Structure for Planar Circuits', IEEE Trans. on Microwave Theory and Tech., Vol. 10, No. 4, Jan., pp.131-133, 2000
  11. D. Ahn et al, 'A Design of the Low-pass Filter using the Novel Microstrip Defected Ground Structure,' IEEE Trans. Microwave Theory Tech., Vo1.49, No.1, pp.86-91, Jan. 2001 https://doi.org/10.1109/22.899965
  12. S. Jeong, et al, 'Amplifier Design using /4 High Impedance Bias Line with Defect. Ground Structure (DGS), 2002 IEEE MTT-S Digest, pp.1161-1164, 2002
  13. F. Yang, K. Ma, Y. Qian, and T.Itoh, 'A Uniplanar Compact Photonic-Bandgap (UC-PBG) Structure and Its Applications for Microwave Circuits,'/IEEE Trans. Microwave Theory Tech., Vol. 47, No. 8,pp.1509-1514, Aug. 1999 https://doi.org/10.1109/22.780402
  14. R. Coccioli, F. Yang, K. Ma, and T. ltoh, 'Aperture-CoupIed Patch Antenna onSubstrate,' IEEE Trans. Microwave Theory Tech., Vo1.47, No.11, pp.2123-2130, Nov. 1999 https://doi.org/10.1109/22.798008
  15. F. Yang, K. Ma, Y. Qian, and T. Itoh, 'A Novel TEM Waveguide Usingr Compact Photonic-Bandgap(UC-PBG) Structure,' IEEE Trans. Theory Tech., Vo1.47, No.H, pp. 2092-2098, Nov. 1999 https://doi.org/10.1109/22.798004
  16. Q. Xue, K.M.Shum, and C.H.Chan, 'Novel 1-D Microstrip PBG Cells,' IEEE and Guided Wave Letters, VolO, No.-lO, pp.403-406, Oct. 2000 https://doi.org/10.1109/75.877226
  17. J. Yun, et al, ' A Design of the Novel Coupled Line Bandpass Filter Using Ground Structure,' 2000 IEEE MTT-S Digest, pp.327-330,2000
  18. T. Kim and C. Seo,' A Novel Photonic Bandgap Structure for Low-Pass Filter Wide Stopband,' IEEEMicrowave and Grounded Wave Letters, VolO, No.-l, pp.13-15, Jan. 2000 https://doi.org/10.1109/75.842072
  19. 조영빈, 김병수, 전계석, '새로운 형태의 DGS를 이용한 저역통과 필터의 주파수 조정 설계' , 한국통신학회 논문지, 제27권 제 12B호, pp. 1174-1181, 2002년 12월