TY - JOUR
T1 - Width-varying conductor-backed coplanar waveguide-based low-pass filter with a constant signal trace to adjacent grounds separation
AU - Al Shamaileh, Khair A.
AU - Dib, Nihad I.
AU - Abushamleh, Said A.
N1 - Funding Information:
This work was funded through a Summer research grant awarded by the College of Engineering and Sciences at Purdue University Northwest. The authors acknowledge the start-up funding received by Dr. Al Shamaileh from the College of Engineering and Sciences Deanship. The authors also acknowledge the donation of substrates from the Rogers Corporation.
Publisher Copyright:
© The Institution of Engineering and Technology 2018
PY - 2019/2/27
Y1 - 2019/2/27
N2 - In this study, the authors introduce a new and systematic procedure for the design and optimisation of a conductor-backed coplanar waveguide low-pass filter (LPF). The width of the centre conductor (i.e. signal trace) is modelled in a truncated Fourier series, whereas the gap to the adjacent grounds is maintained constant relative to the width variation. Transmission lines theory is adopted to model the LPF and establish an optimisation setup. Three optimisation techniques; namely, trust-region-reflective algorithm, symbiotic organism search, and genetic algorithm are investigated to minimise the developed bound-constrained non-linear objective function. To verify the proposed procedure, an LPF with a cutoff frequency of 2 GHz is optimised, simulated, and measured. The transmission parameter in the passband is found to be in the range −0.3 ± 0.1 dB, and better than −30 dB in the stopband.
AB - In this study, the authors introduce a new and systematic procedure for the design and optimisation of a conductor-backed coplanar waveguide low-pass filter (LPF). The width of the centre conductor (i.e. signal trace) is modelled in a truncated Fourier series, whereas the gap to the adjacent grounds is maintained constant relative to the width variation. Transmission lines theory is adopted to model the LPF and establish an optimisation setup. Three optimisation techniques; namely, trust-region-reflective algorithm, symbiotic organism search, and genetic algorithm are investigated to minimise the developed bound-constrained non-linear objective function. To verify the proposed procedure, an LPF with a cutoff frequency of 2 GHz is optimised, simulated, and measured. The transmission parameter in the passband is found to be in the range −0.3 ± 0.1 dB, and better than −30 dB in the stopband.
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U2 - 10.1049/iet-map.2018.5394
DO - 10.1049/iet-map.2018.5394
M3 - Article
AN - SCOPUS:85062029864
SN - 1751-8725
VL - 13
SP - 386
EP - 390
JO - IET Microwaves, Antennas and Propagation
JF - IET Microwaves, Antennas and Propagation
IS - 3
ER -