volume | PIER Journals

Abstract

A two-port coplanar waveguide (CPW) multi input multi output antenna (MIMOA) based on Koch Geometry (KG) with a wide bandwidth and high isolation is proposed in this work. A high frequency structure simulator (HFSS) is used for performance analysis and parametric optimization. Initially, a CPW-fed circular patch was designed, which was further modified using KG, and a single antenna element (SAE) was designed. A two port MIMO layout was further designed using the SAE. The proposed MIMOA is designed with Cross Slot on FR4 substrate, which offers a wide bandwidth of 1110 MHz (3.91-5.02 GHz) and works at 4.16 and 4.69 GHz. It exhibits excellent diversity performance with a Channel Capacity Loss (CCL) < 0.4 bits/s/Hz, Envelope Correlation Coefficient (ECC) < 0.25, Diversity Gain (DG) > 9.7, MEG (1,2) < 1 dB, Total Active Refection Coefficient (TARC) ≈ -20 dB from port 1 to port 2, and isolation of ≈ 20 dB across the band. The proposed MIMOA offers a high radiation efficiency (η) of ≥ 80% across the entire band. The designed MIMOA was fabricated and tested to validate the simulation results. Proposed MIMOA is useful for 5G communication and covers frequency ranging from 3.91 GHz to 5 GHz.

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Mr. Ashish Phalswal

Dr. Ved Prakash

Dr. Sweta Tripathi

Dr. Manish Verma