Wideband Circularly Polarized MIMO Antenna for High Data Wearable Biotelemetric Devices

Wideband Circularly Polarized MIMO Antenna for High Data Wearable Biotelemetric Devices

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This paper presents a miniaturized circularly polarized multiple-input multiple-output (MIMO) antenna for wearable biotelemetric devices.The proposed MIMO ww1 german helmet decals antenna consists of four elements, which are placed orthogonally to the adjacent elements.The proposed antenna has a wideband response [10-dB bandwidth of 2210 MHz (fractional bandwidth (FBW) = 92.

08%) in free space and 10-dB bandwidth of 2200 MHz (FBW = 91.66%) when worn on human-body], this frequency range covers the important and unlicensed industrial, scientific and medical (ISM) band (2.40-2.

48 GHz).The antenna exhibits a wideband 3-dB circularly polarized bandwidth of 1300 MHz (FBW=54.16%) and 1040 MHz (FBW=43.

33%) in free space and when worn on the body, respectively.The optimized antenna in free space (on-body) has an envelop correlation coefficient (ECC) less than five finger death punch a decade of destruction 0.21 (0.

23), a diversity gain (DG) greater than 9.77 dB (9.71 dB), a multiplexing efficiency (ME) greater than -0.

85 dB (-0.63 dB), and a channel capacity loss (CCL) less than 0.13 bps/Hz (0.

13 bps/Hz).The stable radiation, high gain, high efficiency, and good MIMO properties in free space and on human-body make the proposed antenna a suitable choice for use in high data wearable biotelemetric devices.