Authors : Hadi T. Ziboon and Jawad K. Ali
Abstract: The use of asymmetrical structures has been verified in the design BPF dual-band and multiband responses. On the other hand, fractal geometry has been successfully applied to design compact BPFs. Based on these concepts, a triple-band Minkowski fractal based BPF is presented in this study. The structure of the proposed filter is composed of two different stub-loaded fractal-based resonators that are capacitively coupled to a microstrip transmission line. The two resonators are with the same fractal iteration order but one of the resonators is a closed variant of the other resonator. The open fractal SLR resonator will excite the dual-band response while the close SLR resonator will produce its own resonant band. Each resonator can perform individually and the resulting filter response is the combination of their responses. The current distribution analyses at the surface of the filter at different frequencies are used to justify the resulting performance. The dimensions of the proposed filter are found lower than those produced using other techniques in terms of the design guided wavelengths.
Hadi T. Ziboon and Jawad K. Ali, 2018. Design of a Triple-Band Fractal-Based BPF with Asymmetrical SLR Structures. Journal of Engineering and Applied Sciences, 13: 1617-1620.