TY - JOUR
T1 - Compact dual-band bandstop filter based on coupled open-ended Hilbert resonators
AU - Radonic, Vasa
AU - Birgermajer, Slobodan
AU - Cselyuszka, Norbert
AU - Crnojević-Bengin, Vesna
PY - 2019/4/19
Y1 - 2019/4/19
N2 - In this paper, the design procedure of a compact dual-band bandstop filter (DBBSF) based on coupled open-ended Hilbert lines is proposed. The proposed filter topology consists of two pairs of coupled open-ended lines bended in the shape of the Hilbert fractal curves and a stepped-impedance line section (SIS). In that manner, tree transmission paths are crated allowing the independent control of filter characteristic in both bands. To obtain appropriate coupling between resonators, and the independent control of the center frequencies and in-band characteristics of the filter, the SIS is introduced as matching section. Design rules are derived using lossless transmission line model and even/odd analysis. To validate the design concept, two compact DBBSFs have been designed, fabricated, and measured. The proposed filters exhibit excellent in-band characteristics, high selectivity, and small dimensions.
AB - In this paper, the design procedure of a compact dual-band bandstop filter (DBBSF) based on coupled open-ended Hilbert lines is proposed. The proposed filter topology consists of two pairs of coupled open-ended lines bended in the shape of the Hilbert fractal curves and a stepped-impedance line section (SIS). In that manner, tree transmission paths are crated allowing the independent control of filter characteristic in both bands. To obtain appropriate coupling between resonators, and the independent control of the center frequencies and in-band characteristics of the filter, the SIS is introduced as matching section. Design rules are derived using lossless transmission line model and even/odd analysis. To validate the design concept, two compact DBBSFs have been designed, fabricated, and measured. The proposed filters exhibit excellent in-band characteristics, high selectivity, and small dimensions.
KW - Bandstop filter
KW - dual-band filter
KW - even/odd analysis
KW - microstrip
KW - stepped-impedance
UR - https://doi.org/10.1080/09205071.2019.1607568
UR - https://www.mendeley.com/catalogue/542fe634-cffc-3253-bf1c-a2b65fa0f4a0/
U2 - 10.1080/09205071.2019.1607568
DO - 10.1080/09205071.2019.1607568
M3 - Artikel
VL - 33
SP - 1318
EP - 1328
JO - Journal of Electromagnetic Waves and Applications
JF - Journal of Electromagnetic Waves and Applications
IS - 10
ER -