| Multiple input multiple output(MIMO) technology is the key technology of new generation communication system. While the diversity antenna is an important part of MIMO system design. The analysis and simulation of MIMO antenna units is mainly studied in this paper. The main contents include:The antenna structure can be used for a typical MIMO system. The circle and symmetric of second order Hilbert microstrip antennas are selected and simulated. Besides that, using the two kinds of antenna elements above construct the 2*2 arrays, In addition the simulation results are analyzed. The advantages of easy miniaturization and integration are found to the Hilbert fractal antenna.Focusing on the technical requirements of polarization diversity, using 2*2 circle second order Hilbert micro strip design the back double feed antenna and the different results in the light of different feed position are analyzed. After that, second order Hilbert symmetric 2*2 array is used to design the single-layer and double-layer down F antennas and the simulation results are good.Finally, two special MIMO antennas are designed,including MIMO dual-fed antenna and S antenna for MIMO, and simulated in the light of the different structures. |
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