volume | PIER Journals

Abstract

This paper presents a novel bandpass filter with reconfigurable bandwidth or transmission zeros. The proposed filter is based on a multiple-mode stub-loaded resonator. Three PIN diodes are utilized as switching elements to achieve four switchable operating states. The measurement results indicate that the 3 dB fractional bandwidth (FBW) of the filter can be varied from 32.3% to 70% at the centre frequency of 2.2 GHz, and the stopband attenuation is higher than 35 dB. The filter size is only about 0.28λ_g×0.19λ_g.

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2. Feng, Wenjie, Yuxia Shang, Wenquan Che, Roberto Gómez-García, and Quan Xue, "Multifunctional reconfigurable filter using transversal signal-interaction concepts," IEEE Microwave and Wireless Components Letters, Vol. 27, No. 11, 980-982, Nov. 2017.
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6. Allanic, Rozenn, Denis Le Berre, Yves Quere, Cédric Quendo, David Chouteau, Virginie Grimal, Damien Valente, and Jérôme Billoue, "A novel synthesis for bandwidth switchable bandpass filters using semi-conductor distributed doped areas," IEEE Access, Vol. 8, 122599-122609, 2020.
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10. Arain, Salman, Photos Vryonides, Abdul Quddious, and Symeon Nikolaou, "Reconfigurable BPF with constant center frequency and wide tuning range of bandwidth," IEEE Transactions on Circuits and Systems II: Express Briefs, Vol. 67, No. 8, 1374-1378, 2020.

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12. Vryonides, P., S. Nikolaou, S. Kim, and M. M. Tentzeris, "Reconfigurable dual-mode bandpass filter within 10-50%," International Journal of Microwave and Wireless Technologies, Vol. 7, No. 6, 655-660, 2015.
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13. Tsai, Hsuan-Ju, Bo-Chih Huang, Nan-Wei Chen, and Shyh-Kang Jeng, "A reconfigurable bandpass filter based on a varactor-perturbed, T-shaped dual-mode resonator," IEEE Microwave and Wireless Components Letters, Vol. 24, No. 5, 297-299, 2014.

14. Fu, Mingye, Quanyuan Feng, Qianyin Xiang, and Nianhua Jiang, "Fully tunable filter with cross coupling and reconfigurable transmission zero," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 30, No. 12, e22407, 2020.

15. Ramkumar, S. and R. Boopathi Rani, "Compact reconfigurable bandpass filter using quarter wavelength stubs for ultra-wideband applications," AEU --- International Journal of Electronics and Communications, Vol. 151, 154219, 2022.

16. Qin, Pei-Yuan, Feng Wei, and Y. Jay Guo, "A wideband-to-narrowband tunable antenna using a reconfigurable filter," IEEE Transactions on Antennas and Propagation, Vol. 63, No. 5, 2282-2285, May 2015.

17. Liu, Haiwen, Baoping Ren, Xuehui Guan, Jiuhuai Lei, and Shen Li, "Compact dual-band bandpass filter using quadruple-mode square ring loaded resonator (SRLR)," IEEE Microwave and Wireless Components Letters, Vol. 23, No. 4, 181-183, Apr. 2013.

18. Zhang, Ping, Liqin Liu, Deli Chen, Min-Hang Weng, and Ru-Yuan Yang, "Application of a stub-loaded square ring resonator for wideband bandpass filter design," Electronics, Vol. 9, No. 1, 176, 2020.

Professor Liangzu Cao

Dr. Shouzhan Li