TY - JOUR
T1 - 3-D Printed Dual-Band Filter Based on Spherical Dual-Mode Cavity
AU - Chen, Yuan
AU - Zhang, Gang
AU - Hong, Jiasheng
AU - Sun, Zhengyu
AU - Yang, Jiquan
AU - Tang, Wanchun
AU - Feng, Chunmei
N1 - Funding Information:
Manuscript received March 27, 2021; accepted May 9, 2021. Date of publication May 14, 2021; date of current version September 3, 2021. This work was supported in part by the China Postdoctoral Science Foundation under Grant 2020M682646 and in part by the Key Research and Development Program of Jiangsu Province under Grant BE2018010. (Corresponding author: Gang Zhang.) Yuan Chen, Zhengyu Sun, Jiquan Yang, Wanchun Tang, and Chunmei Feng are with the Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing, School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210046, China.
Publisher Copyright:
© 2001-2012 IEEE.
PY - 2021/9
Y1 - 2021/9
N2 - A new dual-band bandpass filter (BPF) is designed and fabricated based on a pair of spherical dual-mode resonant cavities using 3-D printing technology. By elaborately introducing three-type metallic posts into each cavity to perturb the degenerated TM101 modes in a reasonable way, a dual-band coupling topology is developed in the design accordingly. Owing to the cross-coupling paths in the designed topology, two transmission zeros (TZs) are successfully introduced between the passbands, bringing out a high band-to-band isolation. Even more, TZs can also be generated by creating additional internal coupling paths to the presented dual-band coupling topology. Besides, the spherical cavity provides a higher quality factor and wider stopband, compared to that of a square or cylindrical cavity. To validate the design concept, a dual-band BPF prototype, operating at 12.0 and 12.5 GHz with respective bandwidths of 120 and 240 MHz, is implemented by 3-D printing process. The measured results exhibit good agreement with the simulated ones, showing more than 20-dB return losses and 20-dB dual-band isolation.
AB - A new dual-band bandpass filter (BPF) is designed and fabricated based on a pair of spherical dual-mode resonant cavities using 3-D printing technology. By elaborately introducing three-type metallic posts into each cavity to perturb the degenerated TM101 modes in a reasonable way, a dual-band coupling topology is developed in the design accordingly. Owing to the cross-coupling paths in the designed topology, two transmission zeros (TZs) are successfully introduced between the passbands, bringing out a high band-to-band isolation. Even more, TZs can also be generated by creating additional internal coupling paths to the presented dual-band coupling topology. Besides, the spherical cavity provides a higher quality factor and wider stopband, compared to that of a square or cylindrical cavity. To validate the design concept, a dual-band BPF prototype, operating at 12.0 and 12.5 GHz with respective bandwidths of 120 and 240 MHz, is implemented by 3-D printing process. The measured results exhibit good agreement with the simulated ones, showing more than 20-dB return losses and 20-dB dual-band isolation.
KW - 3-D printed
KW - bandpass filter (BPF)
KW - dual band
KW - dual mode
KW - higher Q
KW - spherical cavity resonators
UR - http://www.scopus.com/inward/record.url?scp=85105887724&partnerID=8YFLogxK
U2 - 10.1109/LMWC.2021.3080430
DO - 10.1109/LMWC.2021.3080430
M3 - Article
AN - SCOPUS:85105887724
SN - 1531-1309
VL - 31
SP - 1047
EP - 1050
JO - IEEE Microwave and Wireless Components Letters
JF - IEEE Microwave and Wireless Components Letters
IS - 9
ER -