Abstract
In this paper, the effects of current distribution of antennas on the eigenvalues and capacity of the hexapolarized multiple input multiple output (HMIMO) system are investigated, over free space channel and the perfect electric conducting (PEC) ground reflected channel, individually. Computation results show that the capacity of the HMIMO system composed of loop antennas with uniform current distribution is larger than that of the system composed of the loops with non-uniform current distribution, in both of the two channels. When SNR = 20 dB, the capacity of HMIMO system with uniform current distributed loop antennas is about 20% larger than that of the non-uniform current distributed loop antennas in the PEC ground reflected channel. Furthermore, for both the two types of loops, capacity of the HMIMO system in the PEC reflected channel is about 20% larger than that in the free space channel. Interestingly, 6 non-zero eigenvalues can be obtained by the HMIMO system, in both the free space and PEC ground reflected channel, however, some of the them are too small to be used as an effective parallel channel for information transfer.
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