摘要
In this paper, the design of a compact triple-band bandpass filter using multilayer structure across three operating bands (2.4 GHz, 3.5 GHz, 5.2 GHz) is proposed. The structure is mainly composed of two pairs of stepped-impedance resonators (SIR), where in the stepped-impedance resonators can be independently designed. By using stepped impedance resonators with different impedance ratios (K) and length ratios (α) to effectively determine the first and second resonance modes, a stopband greater than -20 dB is designed across 5.5 GHz to 11.5 GHz. The measured results are in good agreement with the full-wave electromagnetic (EM) simulation results.
延伸閱讀
- 李世鈞（2012）。Design Of Dual-Band Bandpass Filter〔碩士論文，國立中正大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0033-2110201613512063
- Lin, J. S. (2011). Study of Multi-Band Bandpass Filters Using Modifiable Coupling [master's thesis, National Pingtung University of Science and Technology]. Airiti Library. https://doi.org/10.6346/NPUST.2011.00175
- 黃威翔（2009）。Design of a dual-band bandpass filter with a wide rejection band〔碩士論文，國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU.2009.00416
- Pan, W. Q., Zhao, X. L., Zhang, Y., & Xu, J. X. (2015). High Selectivity Dual-Band Bandpass Filter with Tunable Lower Passband. International Journal of Antennas and Propagation, 2015(), 190-195-222. https://doi.org/10.1155/2015/762504
- 黃楷倫（2016）。Design of Compact Multi-band Microstrip Bandpass Filters〔碩士論文，逢甲大學〕。華藝線上圖書館。https://doi.org/10.6341/fcu.M0305208