Journal of electromagnetic engineering and science

  • 제12권3호
  • /
  • Pages.210-215
  • /
  • 2012
  • /
  • 2671-7255(pISSN)
  • /
  • 2671-7263(eISSN)
한국전자파학회 (The Korean Institute of Electromagnetic Engineering and Science)
권호 표지
DOI QR코드

DOI QR Code

An Enhanced Skirt Characteristics Triple-Mode Filter

  • Lee, Ja-Hyeon (Dept. of Electronics and Computer Engineering, Chonnam National University) ;
  • Nam, Hun (Ericsson-LG Co., Ltd.) ;
  • Lim, Yeong-Seog (Dept. of Electronics and Computer Engineering, Chonnam National University)
  • 투고 : 2012.02.17
  • 심사 : 2012.07.16
  • 발행 : 2012.09.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

This paper presents a compact microstrip triple-mode filter with enhanced skirt characteristics. The presented triple-mode filter configuration supports three transmission poles and three transmission zeros within the nearby passband. Two of transmission zeros are generated by a triple-mode resonator itself, and the third one is generated by small cross-couplings between the I/O ports. Each resonance condition and the transmission zero generation conditions are analyzed using an equivalent circuit. The bandpass filter is designed for a 2.4 GHz WLAN. The filter was fabricated with a relative dielectic constant of 3.5 and a thickness of 0.76 mm. The fabricated filter has a small size ($7.9mm{\times}7.2mm$, i.e., $0.107{\lambda}_g{\times}0.098{\lambda}_g$, where ${\lambda}_g$ is guided wavelength at a center frequency) and shows high performing skirt characteristics.

키워드

참고문헌

  1. I. Wolff, "Microstrip bandpass filter using degenerate modes of a microstrip ring resonator," Electronics Letter, vol. 8, no. 12, pp. 29-30, 1972. https://doi.org/10.1049/el:19720023
  2. C. Karpuz, G. M. Eryilmaz, and A. Gorur., "Compact dual-mode microstrip quasi-meander loop resonator for filter applications," 38th European Microwave Conference, pp. 630-633, 2008.
  3. J. S. Hong, M. J. Lancaster, "Microstrip bandpass filter using degenerate modes of a novel meander loop resonator," IEEE Microwave and Guided Wave Leters., vol. 5, no. 11, pp. 371-372, 1995. https://doi.org/10.1109/75.473539
  4. J. L. Li, S. -W. Qu, and Q. Xue, "Compact dual-mode patch resonator for filter applicatoins," IEEE MTTS International Microwave Workshop Series on, pp. 83-86, 2008.
  5. J. -R. Lee, J. -H. Cho, and Sang-Won Yun, "New compact bandpass filter using microstrip λ/4 resonators with open stub inverter," IEEE, Microwave and Guided Wave Letters, vol. 10, no. 12, pp. 526- 527, 2000. https://doi.org/10.1109/75.895091
  6. W. -H. Tu, "Compact double-mode cross-coupled microstrip bandpass filter with tunable transmission zeros," IET. Microwaves, Antennas & Propagation, vol. 2, no. 4, pp. 373-377, 2008 https://doi.org/10.1049/iet-map:20070203
  7. T. Yang, M. Tamura, and T. Itoh, "Compact hybrid resonator with series and shunt resonances used in miniaturized filters and balun filters," IEEE Transactions on, Microwave Theory and Techniques, vol. 58, no. 2, pp. 390-402, 2010. https://doi.org/10.1109/TMTT.2009.2038662
  8. J. Lee, Y. Lim, "A compact microstrip dual-mode filter," Microwave and Optical Technology Letters, vol. 53, no. 10, pp. 2368-2371, 2010.
  9. W. Shen, X. -W. Sun, and W. -Y. Yin, "A novel microstrip filter using Three-Mode Stepped Impedance Resonator(TSIR)," IEEE. Microwave and Wireless Components Letters, vol. 19, no. 12, pp. 774-776, 2009. https://doi.org/10.1109/LMWC.2009.2033495
  10. L. Zhang, Z. Yu, and L. Guo, "A novel microstrip triple-mode wideband bandpass filter using radialline stubs," 2010 Microwave and Milimeter Wave Technology, pp. 471-743, 2010.
  11. W. -H. Tu, "Microstrip bandpass filters using crossshaped triple-mode resonator," IET. Microwaves, Antennas & Propagation, vol. 4, iss. 9, pp. 1421- 1426, 2010. https://doi.org/10.1049/iet-map.2009.0364
  12. Q. -X. Chu, F. -C. Chen, Z. -H. Tu, and H. Wang, "A novel crossed resonator and its applications to bandpass filters," IEEE Transactions on, Microwave Theory and Techniques, vol. 57, no. 7, pp. 1753-1759, 2009. https://doi.org/10.1109/TMTT.2009.2022873
  13. A. Balalem, A. R. Ali, S. Amari, J. Machac, and A. Omar, "Realization of a microstrip triple-mode bandpass filter using a square-loop resonator," IEEE MTTS International Microwave Workshop Series on, pp. 849-852, 2009.
  14. A. Torabi, K. Forooraghi, "Miniature harmonic-suppressed microstrip bandpass filter using a triplemode stub-loaded resonator and spur lines," IEEE. Microwave and Wireless Components Letters, vol. 21, no. 5, pp. 255-257, 2011. https://doi.org/10.1109/LMWC.2011.2122304
  15. Lee, Y. Lim, "A compact microstrip triple-mode filter," 2011 Asia-Pacific Microwave Conference, pp. 151-154, 2011.
  16. J. S. Hong, M. J. Lancaster, Microstrip Filters for RF/Microwave Applications, New York: Willey, 2001.

피인용 문헌

  1. Switchable power combining circuit for improved graceful-degradation performance vol.57, pp.5, 2015, https://doi.org/10.1002/mop.29052