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Compact triple‐mode HMSIW balanced passband filter with intrinsic common‐mode suppression
Author(s) -
Zhu Jiaming,
Deng Hongwei,
Han Yangkun,
Xing Sibei,
Han Wei
Publication year - 2021
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.32827
Subject(s) - passband , planar , conductor , insertion loss , materials science , optics , physics , band pass filter , filter (signal processing) , optoelectronics , electrical engineering , engineering , computer science , computer graphics (images) , composite material
In this article, a compact triple‐mode balanced passband filter with intrinsic common‐mode (CM) suppression is designed by using a single isosceles right triangle perturbed half‐mode substrate integrated waveguide (HMSIW) cavity. The perturbation metallic vias are introduced to tune the first three resonant modes of HMSIW cavity to form a passband. Furthermore, the planar differential microstrip‐pin feed structure is designed to excite the perturbed substrate integrated waveguide cavity. Under CM operation, when the substrate's height is less than λ g /4, the space between perfect electric conductor and perfect magnetic conductor cannot transmit electromagnetic wave, so CM noise can effectively cut off at the planar differential feed structure in a wide frequency range. Finally, a prototyped prototype at 4.5 GHz is designed and fabricated, and measured results show good agreement with simulated ones.