Journal of electromagnetic engineering and science

  • 제18권1호
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  • Pages.41-45
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  • 2018
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  • 2671-7255(pISSN)
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  • 2671-7263(eISSN)
한국전자파학회 (The Korean Institute of Electromagnetic Engineering and Science)
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A Coupled Line Impedance Transformer for High Termination Impedance with a Bandpass Filtering Response

  • Kim, Phirun (Division of Electronics and Information Engineering, IT Convergence Research Center, Chonbuk National University) ;
  • Jeong, Yongchae (Division of Electronics and Information Engineering, IT Convergence Research Center, Chonbuk National University)
  • 투고 : 2017.07.05
  • 심사 : 2017.12.24
  • 발행 : 2018.01.31
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초록

In this study, a short-ended coupled line with a short-circuit stub transmission line bandpass filtering impedance transformer is presented. The general designed equations are derived on the basis of circuit theory. The design curves are provided to examine the characteristic of the proposed impedance transformer. The proposed circuit is suitable for high termination impedance. To validate the design formulas, a $400-50{\Omega}$ impedance transformer is designed and fabricated at the operating center frequency ($f_0$) of 2.6 GHz. The measured results show a good agreement with the simulation. The measured insertion and return losses are 0.6 dB and 22.5 dB at $f_0$, respectively. The measured return loss is higher than 20 dB within the passband frequency of 2.51-2.7 GHz. Moreover, the stopband attenuation is higher than 25 dB from DC to 1.64 GHz of the lower stopband and from 3.12 GHz to 6.4 GHz of the higher stopband.

키워드

참고문헌

  1. P. Kim, J. Jeong, G. Chaudhary, and Y. Jeong, "A design of unequal termination impedance power divider with filtering and out-of-band suppression characteristic," in Proceedings of the 45th European Microwave Conference (EuMC), Paris, France, 2015, pp. 123-126.
  2. B. J. Xiang, S. Y. Zheng, Y. M. Pan, and Y. X. Li, "Wideband circularly polarized dielectric resonator antenna with bandpass filtering and wide harmonics suppression response," IEEE Transactions on Antennas and Propagation, vol. 65, no. 4, pp. 2096-2101, 2017. https://doi.org/10.1109/TAP.2017.2671370
  3. B. Zhang, G. Dong, Y. Wu, C. Yu, and Y. Liu, "Filtering push-pull power amplifier based on novel impedance transformers," Electronics Letters, vol. 52, no. 17, pp. 1467-1468, 2016. https://doi.org/10.1049/el.2016.2010
  4. G. L. Matthaei, L. Young, and E. M. T. Jones, Microwave Filters, Impedance-Matching Network and Coupling Structures. Norwood, MA: Artech House, 1980.
  5. R. Zhang, S. Luo, and L. Zhu, "Synthesis and design of mixed lumped and distributed low-pass filters/low-passing impedance transformers with Taylor series," IEEE Transactions on Microwave Theory and Techniques, vol. 64, no. 4, pp. 1265-1272, 2016. https://doi.org/10.1109/TMTT.2016.2536598
  6. K. S. Ang, C. H. Lee, and Y. C. Leong, "A broad-band quarter wavelength impedance transformer with three reflection zeros with passband," IEEE Transactions on Microwave Theory and Techniques, vol. 52, no. 12, pp. 2640-1644, 2004. https://doi.org/10.1109/TMTT.2004.837310
  7. Q. S. Wu and L. Zhu, "Wideband impedance transformers on parallel-coupled and multisection microstrip lines: synthesis design and implementation," IEEE Transactions on Components, Packaging and Manufacturing Technology, vol. 6, no. 12, pp. 1873-1880, 2016. https://doi.org/10.1109/TCPMT.2016.2621055
  8. P. Kim, J. Park, J. Jeong, S. Jeong, G. Chaudhary, and Y. Jeong, "High selective coupled line impedance transformer with second harmonic suppression," Journal of Electromagnetic Engineering Science, vol. 16, no. 1, pp. 13-18, 2016. https://doi.org/10.5515/JKIEES.2016.16.1.13
  9. P. Kim, G. Chaudhary, and Y. Jeong, "Ultra-high transforming ratio coupled line impedance transformer with bandpass response," IEEE Microwave and Wireless Components Letters, vol. 25, no. 7, pp. 445-447, 2015. https://doi.org/10.1109/LMWC.2015.2429075
  10. Q. S. Wu and L. Zhu, "Short-ended coupled-line impedance transformers with ultrahigh transforming ratio and bandpass selectivity suitable for large load impedances," IEEE Transactions on Components, Packaging and Manufacturing Technology, vol. 6, no. 5, pp. 767-774, 2016. https://doi.org/10.1109/TCPMT.2016.2551731
  11. P. Kim, G. Chaudhary, and Y. Jeong, "Enhancement impedance transforming ratios of coupled line impedance transformer with wide out-of-band suppression characteristics," Microwave and Optical Technology Letters, vol. 57, no. 7, pp. 1600-1603, 2015. https://doi.org/10.1002/mop.29144

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