Abstract
A compact wideband dual-/quad-element multiple input multiple output (MIMO) antenna, using jeans textile material for WiMAX (IEEE 802.16d) and 5G application band, is proposed. The wideband nature of basic single element antenna with a frequency span of 2.74 to 4.41 GHz (47%) is analyzed in detail by using circuit model representation. Thereafter, in order to resolve different practical issues, such as multipath fading, shadowing and scattering of electromagnetic waves as well as human body effect, wideband compact quad-element MIMO antenna is presented. To improve isolation characteristics, meander line structures are integrated in-between the antenna elements. Isolation is achieved greater than 19dB over the whole application band. The diversity parameters such as envelope correlation coefficient (ECC < 0.2), diversity gain (DG > 9.6) and mean effective gain (MEG = ±0.3dB) are found within the satisfactory ranges. Measured outcomes are also good enough to confirm the antenna as a suitable contender for wearable scenarios.
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