Design of Defected Ground Band Pass Filters Using Stepped Impedance Resonators

Abstract

Abstract-In this paper, band-pass filters based on the microstrip configuration and utilizing coupled defected ground structures are presented. The 50 Ω microstrip line has a gap discontinuity in the middle and characterized by stepped impedance resonators on either half. The four fractal geometries tested for defected ground are the first and second iterations of the modified Moore curve, the closed staircase curve and a dual concentric closed staircase curve. The filters have a compact size and planar geometry. The modified Moore first iteration has a measured pass band from 2.27 GHz to 11.86 GHz, whereas the second iteration has a measured pass band from 1.85 GHz to 6.71 GHz. The measured pass band of the closed staircase filter is from 2.38 GHz to 7.21 GHz. The dual-concentric closed-staircase DGS filter offers a dual-band response with the measured pass band being from 2.41 GHz to 5.01 GHz and from 5.81 GHz to 8.35 GHz. All the filters can have applications in the UWB region. A parametric study showing the effect of the various controlling parameters is also presented.

Simulation Studies on the Design and Analysis of Interdigital and Fractal-Based Micro-Supercapacitors

“…The process is replicated for higher levels of iteration. 17 The equation for the total length of the Hilbert curve for different iteration levels j is,…”

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A Wide-Beam Circularly Polarized Asymmetric-Microstrip Antenna

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Compact bandpass filters based on linked hexagonal‐omega resonators

“…Stepped impedance resonator was widely used to design bandpass filters and to improve its performance . To reduce the total size of bandpass filters, dual mode resonator has been proposed for the design of this component .…”