Open AccessMillimetre‐wave balanced SIW bandpass filter with high common‐mode suppression
Author(s) -
Guo ZiJun,
Hao ZhangCheng,
Wu YiWen
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2020.1928
Subject(s) - band pass filter , millimetre wave , electronic engineering , filter (signal processing) , extremely high frequency , mode (computer interface) , common mode signal , physics , computer science , electrical engineering , optics , engineering , digital signal processing , analog signal , operating system
A balanced substrate‐integrated waveguide (SIW) filter based on a virtual electric wall (VEW) is presented and studied in this Letter. By introducing VEW on the symmetry plane for replacing the metallic‐via‐array, conductor losses from metal sidewalls can be avoided. As proof‐of‐concept example, a six‐pole balanced filter using asymmetric inductive windows is designed and fabricated with a measured centre frequency of 29.45 GHz, as well as fractional bandwidth of 7.2% to cover satellite ground terminal application. The measured response shows a good concordance with the simulated one, indicating that the proposed balanced filter has the advantages of high common‐mode suppression and low insertion loss.