In this work, an eight-element multiple-input multiple-output (MIMO) antenna with circular polarisation (CP) ability is proposed. The proposed antenna consists of eight off-centred fed modified rectangularopen-loop r...
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In this work, an eight-element multiple-input multiple-output (MIMO) antenna with circular polarisation (CP) ability is proposed. The proposed antenna consists of eight off-centred fed modified rectangular open-loop resonating radiators. CP behaviour is realised by utilising a narrow slit on the loop and a modified ground plane. Measurement reveals that the proposed CP-MIMO antenna occupies an overlapping 10 dB return loss bandwidth and a 3 dB axial ratio bandwidth over the frequency span of 5-6 GHz with inter-element isolation > 8 dB. Essential diversity and multiplexing performances are estimated intuitively by means of the envelope correlation coefficient and ergodic channel capacity, which lie within their adequate range. To ensure its applicability in user terminal devices and confirm the use of other electronic circuitry, the antenna performances are also investigated in the presence of a conducting sheet which is commonly grounded with the antenna ground plane.
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