Development of Multi-Band Sub-6 GHz MIMO Antenna Using Complementary Split Ring Resonator and Defected Ground Structure
Development of Multi-Band Sub-6 GHz MIMO Antenna Using Complementary Split Ring Resonator and Defected Ground Structure |
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| © 2025 by IJETT Journal | ||
| Volume-73 Issue-11 |
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| Year of Publication : 2025 | ||
| Author : Basavaraju D R, Sukumar Ramanujam | ||
| DOI : 10.14445/22315381/IJETT-V73I11P122 | ||
How to Cite?
Basavaraju D R, Sukumar Ramanujam,"Development of Multi-Band Sub-6 GHz MIMO Antenna Using Complementary Split Ring Resonator and Defected Ground Structure", International Journal of Engineering Trends and Technology, vol. 73, no. 11, pp.312-324, 2025. Crossref, https://doi.org/10.14445/22315381/IJETT-V73I11P122
Abstract
This study presents a multi-band, two-port MIMO antenna incorporating a Complementary Split Ring Resonator (CSRR) on the radiating patch and an inverted-L shaped slot on the ground plane. The design is tailored to support WiMAX, 5GHz Wi-Fi, and Advanced 5G Applications. The proposed MIMO antenna works at three frequency bands centered at 3.6 GHz, 4.47 GHz, and 5.53 GHz. The optimized circular CSRR with diagonal splits introduced on the radiating patch yields one more resonance frequency band by converting a wideband to a dual-band antenna. The Square loop structured strip line, Coplanar Waveguide (CPW) feed, improves the bandwidth and impedance matching. An inverted-L-shaped slot on the ground plane generates a multi-band characteristic by introducing one more band from 5.16 GHz to 7 GHz. The designed antenna has a dimension of 63 x 20 x 1.6 mm3. The FR4 substrate with a dielectric constant of 4.4, a thickness of 1.6 mm, was used for the simulation as well as fabrication. The implemented antenna is examined with MIMO performance parameters, and simulated and measured quantities are in good agreement. The Simulated results of S21 less than -24dB, ECC<0.0035, DG>9.999 dB, TARC less than -10dB, and CCL < 0.175 bits/sec/Hz for all three bands were obtained. The overall gain of the MIMO was found to be 3.1dBi. The analysis shows that the incorporation of CSRR resulted in a dual-band with slightly improved gain, and the CPW feed improves the gain as well as the bandwidth. The defective ground structure (inverted-L -L shape) leads to the multi-band characteristic. The antenna was fabricated, and its performance was tested with a Vector Network Analyzer (VNA). The results signify that the implemented antenna is a potential candidate for applications in the 5G Sub-6 GHz Band.
Keywords
MIMO, CSRR, DGS, Sub-6 GHz.
References
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