A miniaturized fractal based hexagonal open-loop resonator BPF for WiMAX applications

RF/Microwave filters represent an important component in most modern wireless communication systems since they reject unwanted signals (noise) and pass the required frequencies. Emerging new generations and development of communication systems need for good performance and miniaturized Band Pass Filters (BPFs). Minkowski fractals used as a miniaturization technique has been applied to slotted hexagonal loop resonator for designing BPF operate at a 3.5GHz resonance frequency which is suitable for WiMAX applications. The proposed filter has been designed using FR-4 substrate with dielectric constant 4.3 and thickness 1.6mm. More than one structure has been simulated. The overall dimensions of the second iteration Minkowski fractal proposed BPF are 7.07mm x 9.88mm which is demonstrates 80.46% reduction in size as compared with conventional closed hexagonal loop resonator BPF. CST microwave studio suite software package has been used in the simulation.