Abstract
ABSTRACTThis work describes a frequency response investigation of a band pass microstrip filter geometry printed on different substrate materials. The filter geometry comprises a wavelength rectangular ring resonator that is side coupled to two quarter‐wavelength lines to provide the access ports. This filter geometry is particularly suitable for high‐frequency selective applications. The investigation of the properties of the filter geometry is carried out for iso/anisotropic dielectric, ferrimagnetic, and metamaterial substrates, for comparison purpose. Simulation and design are performed using Ansoft HFSS, a commercial software based on the accurate finite element method. Resonant frequency, return loss, insertion loss, and percent bandwidth results are compared and discussed, taking into account the effect produced by each material substrate on the filter performance. Prototypes of band pass filters on isotropic substrates are built and measured. Simulated and measured results are in agreement. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:201–206, 2014
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