Abstract
A compact four-element multiple-input multiple output (MIMO) antenna is proposed for medical applications operating at a 2.4 GHz ISM band. The proposed MIMO design occupies an overall volume of 26 mm × 26 mm × 0.8 mm. This antenna exhibits a good impedance matching at the operating frequency of the ISM band, whose performance attributes include: isolation around 25 dB, envelope correlation coefficient (ECC) less than 0.02, average channel capacity loss (CCL) less than 0.3 bits/s/Hz and diversity gain (DG) of around 10 dB. The average peak realized gain of the four-element MIMO antenna is 2.4 dBi with more than 77 % radiation efficiency at the frequency of interest (ISM 2.4 GHz). The compact volume and adequate bandwidth, as well as the good achieved gain, make this antenna a strong candidate for bio-medical wearable applications.
Highlights
Due to the tremendous demand for high data rate and large channel capacity, developing multiple-input multiple-output (MIMO) antenna systems is given more attention by industry and academia
One of the most challenging tasks in the MIMO paradigm is to accomplish high isolation and low correlation between different elements, in which this will contribute to increasing the channel capacity and obtain both a higher gain as well as good spectral efficiency
By reviewing all ISM 2.4 GHz band MIMO antennas in Table 1, one can observe that the proposed antenna has achieved a smaller size compared to all works in [32,33,34,35,36,37,38], higher isolation in contrast to antennas in [32,33,37], improved envelope correlation coefficient (ECC) with comparison to refs [30,35], and better power gains over the designs in [33,36,38]
Summary
Due to the tremendous demand for high data rate and large channel capacity, developing multiple-input multiple-output (MIMO) antenna systems is given more attention by industry and academia. The MIMO technology has been extensively considered and exploited to improve the channel capacity and signal quality In this context, the isolation between the closely spaced elements largely affects the antenna system performance [4,5]. By reviewing all ISM 2.4 GHz band MIMO antennas, one can observe that the proposed antenna has achieved a smaller size compared to all works in [32,33,34,35,36,37,38], higher isolation in contrast to antennas in [32,33,37], improved ECC with comparison to refs [30,35], and better power gains over the designs in [33,36,38].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
