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Analysis of a Novel Compact Ultra-Wide Band Multiple-Input Multiple-Output Antenna

Promise Elechi, Bodunrin Isa Bakare, Edidiong Ene Bassey

Abstract


This research work presents a compact six-port Multiple-Input Multiple-Output (MIMO) antenna that operates in the whole license-free Ultra-Wideband (UWB) spectrum of 3.1–10.6 GHz. The arrangement of the six antennas is near allowing for spatial diversity. The antenna elements are conventional rectangular patch UWB antennas. The major problems with antennas which are poor impedance, poor Voltage Standing Wave Ratios (VSWR), high mutual coupling and poor radiation efficiency were considered and resolved in this novel MIMO antenna. The antenna was designed using the microstrip patch method in a Computer Simulation Technology (CST) environment. CST was also used to design the antenna substrates and conduct all simulations. The antenna’s ground plane used is FR-4 for the substrate design and copper is the patch antenna material. The antenna is 30mm x 25mm x 0.3mm in size with a 50-impedance feedline. The antenna’s performance characteristics were analyzed, and the S-parameters illustrated a wide frequency response between 3.1-10GHz. The entire system loses lesser power than the absorbed power which makes this system very reliable with a radiation efficiency of less than -1dB (68%) across the frequency band. The VSWR of the antenna is less than 2 and greater than 1 allowing the system to have a positive maximum reflection. This design is therefore suitable for telecommunication systems requiring high speed and better signal transmission.


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References


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