A Novel Triple-Band Band-Pass Metamaterial Filter based on Modified Square Split Ring Resonators for Microwave Applications: Design and Analysis

Abstract

In response to the growing demand for miniaturized electronic devices, this work presents a novel triple-band band-pass filter (TBBPF) design utilizing metamaterial design. The proposed filter comprises three split-ring resonators (SRRs) featuring identical modified square shapes but different dimensions, all printed on Rogers RT/Duroid 6002 substrates with a relative electrical permittivity of 2.94 and thickness of 1.52 mm. The compact filter design, occupying just 10×10 mm², is fed by two 5.25 mm microstrip lines matched at 50 Ω. Our simulation outcomes demonstrate exceptional performance across C-, X-, and Ku-bands, with distinct resonance frequencies at 6.06 GHz, 10.71 GHz, and 13.64 GHz, respectively. The filter exhibits remarkable electrical characteristics, including minimal insertion losses (????????<1.5 dB), optimal bandwidth distribution, and notably compact dimensions. These characteristics, combined with the filter's multi-band capabilities, make it particularly suitable for diverse applications in wireless communication systems, imaging technologies, and biomedical detection devices. The innovative design approach presented here addresses the contemporary challenges in RF/microwave system miniaturization while maintaining high-performance standards, offering a versatile solution for modern electronic systems requiring multi-band functionality.