Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Cascaded Structure of the High-Temperature Superconducting Hairpin-Comb Filter

고온초전도 헤어핀 콤 여파기의 cascade 구조에 관한 연구

  • Published : 2001.03.25
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Abstract

To improve the skirt characteristic of the high-temperature superconducting filter, we proposed a structure of cascading two independent hairpin-comb filters with an identical frequency response. Resonators of the cascaded filter are arranged in the shape of a diamond so that it minimizes the cross coupling between the resonators. This structure can be used effectively to improve the skirt characteristic of the filter in limited area of a circular wafer. The simulated skirt characteristic of the 18 pole cascaded filter is more than 40dB/MHz attenuation below and above the passband.

여파기의 스커트 특성을 향상시키기 위해서 동일한 주파수 특성을 지닌 독립적인 고온초전도 헤어핀 콤여파기를 효과적으로 cascade하는 방법을 제시하였다. Cascade 여파기는 공진기들을 마름모 형태로 배열한 구조로서 공진기 사이의 교차 결합을 최소화 할 수 있고 한정된 원형의 웨이퍼에 좋은 스커트 특성을 얻고자 할 때 효과적으로 쓰일 수 있다. 시뮬레이션 결과에 의하면 18 폴 cascade 여파기의 스커트 특성은 통과 대역 아래쪽과 위쪽에서 40dB/MHz 이상 감소하였다.

Keywords

References

  1. D. Zhang, G.-C. Liang, C. F. Shih, Z. H. Lu, and M. E. Johansson, 'A 19-pole cellular band pass filter using 75-mm-diameter high-temperature superconducting thin films,' IEEE Microwave and Guided-wave Letters, vol. 20, pp. 405-407, Nov. 1995 https://doi.org/10.1109/75.473527
  2. H. T. Kim, B.-C. Min, Y. H. Choi, S.-H. Moon, S.-M. Lee, B. Oh, J.-T. Lee, I. Park, and C.-C. Shin, 'A compact narrowband HTS microstrip filter for PCS applications,' IEEE Trans. Applied Superconductioity, vol. 9, pp. 3909-3912, June 1999 https://doi.org/10.1109/77.783882
  3. G. Tsuzuki, M. Suzuki, N. Sakakibara, and Y. Ueno, 'Narrow band 2GHz superconducting filter,' in 1998 Asia-Pacific Microwave Conference, pp. 1509-1512
  4. G. Tsuzuki, M. Suzuki, N. Sakakibara, and Y. Ueno, 'Novel superconducting ring filter,' in 1998 IEEE MTT-S Int. Microwave Symp. Dig, vol. 1, pp. 379-382 https://doi.org/10.1109/MWSYM.1998.689397
  5. J.-F. Liang, C.-F. Shih, Q. Huang, D. Zhang, and G. -C. Liang, 'HTS microstrip filters multiple symmetric and asymmetric prescribed transmission zeros,' in 1999 IEEE MTT-S Int. Microwave Symp. Dig., vol. 4, pp.1551-1554 https://doi.org/10.1109/MWSYM.1999.780252
  6. J.-S. Hong, M. J. Lancaster, J.-C. Mage, 'Cross-coupled HTS microstrip open-loop resonator filter on LAO substrate,' in 1999 IEEE MTT-S Int. Microwave Symp. Dig., vol. 4, pp. 1559-1562 https://doi.org/10.1109/MWSYM.1999.780254
  7. G. L. Matthaei, N. O. Fenzi, R. J. Forse, and S. M. Rohlfing, 'Hairpin-comb filters for HTS and other narrow-band applications,' IEEE Trans. Microwave Theory Tech, vol. 45, pp. 1226-1231, Aug. 1997 https://doi.org/10.1109/22.618411
  8. G. L. Matthaei and G. L. Hey-Shipton, 'Concerning the use of high-temperature superconductivity in planar microwave filters,' IEEE Trans. Microwave Theory Tech, vol. 42, pp. 1287-1994, July 1994 https://doi.org/10.1109/22.299720
  9. M. J. Lancaster, Passive Microwave Device Applications of High-Temperature Superconductors. Cambridge University Press, 1997
  10. C.-C. Yang and C.-Y. Chang, Microstrip cascade trisection filter, IEEE Microwave and Guided-wave Letters, vol. 9, pp. 271-273, July 1999 https://doi.org/10.1109/75.774144
  11. J. S. Hong and M. J. Lancaster, 'Cross-coupled microstrip hairpin-resonator filters,' IEEE Trans. Microwave Theory Tech, vol. 46, pp. 118-122, Jan. 1998 https://doi.org/10.1109/22.654931
  12. J. S. Hong and M. J. Lancaster, 'Couplings of microstrip square open-loop resonators for cross-coupled planar microwave filters,' IEEE Trans. Microwave Theory Tech, vol. 44, pp. 2099-2109, Dec. 1996 https://doi.org/10.1109/22.543968
  13. R. Levy, 'Direct synthesis of cascaded quadruplet (CQ) filters,' IEEE Trans. Microwave Theory Tech., vol. 43, pp. 2940-2945, Dec. 1995 https://doi.org/10.1109/22.476634
  14. P. Pramnick, 'Compact 900-MHz hairpin-line filters using high dielectric constant microstrip line,' Int. J. of Microwave and Millimeter-wave Camp.-Aided Eng., vol. 4, pp. 272-281, 1994 https://doi.org/10.1109/MWSYM.1993.277028
  15. G. L. Matthaei, L. Young, and E. M. T. Jones, Microwave Filters, Impedance-Matching Networks, and Coupling Structures. Norwood, MA: Artech House, 1980