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Aug 23, 2022;12 (1): 14351.

A systematic investigation of four ports MIMO antenna depending on flexible material for UWB networks.

Ahmed A Ibrahim, Mohamed I Ahmed, Mai F Ahmed
Author Information
  1. Ahmed A Ibrahim: Electronics and Communications Engineering Department, Minia University, El-Minia, Egypt. ahmedabdel_monem@mu.edu.eg.
  2. Mohamed I Ahmed: Microstrip Department, Electronics Research Institute, Giza, Egypt.
  3. Mai F Ahmed: Department of Electronics and Comm. Engineering, Faculty of Engineering, Zagazig University, Zagazig, Egypt.
PMID: 35999247 DOI: 10.1038/s41598-022-18551-8

Abstract

A flexible quad-port MIMO antenna with good isolation features with both flat and bending configurations is presented and investigated in this work. The single unit of the MIMO is composed of a crescent-shaped monopole antenna connected with a curved coplanar waveguide (CPW) fed to enhance the operating bandwidth. A thin and flexible Roger 3003 material with thickness = 0.13 mm, εr = 3, and tan δ = 0.001 is used. To improve the isolation between ports which in turn improves the performance of the MIMO system, the single unit antenna is repeated four times and placed orthogonal to each other. A 54 mm × 54 mm × 0.13 mm (0.63λo × 0.63λo × 0.0015λo @ 3.5 GHz) is the total size of the quad ports MIMO antenna. The flexible MIMO antennas in both flat and bending layouts are simulated, tested and the outcomes achieved S < - 10 dB from 3.5 GHz up to 11 GHz with mutual coupling ≤ - 17 dB between ports. The radiation patterns of the MIMO antenna are tested with 5 dB peak gain and with semi-omnidirectional and bidirectional patterns in both two planes. The Diversity Gain (DG) values ≥ 9.9 dB through the designed working band, Envelop Correlation Coefficient (ECC) lower than 0.03 from 3.5 GHz to 4 GHz and lower than 0.01 from 4 to 11 GHz, and Channel Capacity Loss (CCL) value ≤ 0.5 bit/s/Hz over the worked band are calculated and extracted in flat and bending configurations and achieved suitable values which support the suggested antenna in the UWB flexible networks.

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Journal Article
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Word Cloud

Created with Highcharts 10.0.0MIMOantennaflexibleportsflatbending035 GHzisolationconfigurationssingleunitmaterial13 mmfour63λo × 0testedachieved11 GHzpatternsbandlowerUWBnetworksquad-portgoodfeaturespresentedinvestigatedworkcomposedcrescent-shapedmonopoleconnectedcurvedcoplanarwaveguideCPWfedenhanceoperatingbandwidththinRoger3003thickness = 0εr = 3tanδ = 0001usedimproveturnimprovesperformancesystemrepeatedtimesplacedorthogonal54 mm × 54 mm × 00015λo@totalsizequadantennaslayoutssimulatedoutcomesS < - 10 dBmutualcoupling ≤ -17 dBradiation5 dBpeakgainsemi-omnidirectionalbidirectionaltwoplanesDiversityGainDGvalues ≥ 99 dBdesignedworkingEnvelopCorrelationCoefficientECC034 GHz014ChannelCapacityLossCCLvalue ≤ 05bit/s/Hzworkedcalculatedextractedsuitablevaluessupportsuggestedsystematicinvestigationdepending

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