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A complete multiple-input multiple-output (MIMO) system model with compact arrays at both link ends containing arbitrary matching networks is presented based on a Z-parameter approach. The complete channel matrix including the coupling effect is also presented. Utilizing this system model, the optimum single-port matching impedance for capacity maximization is derived for a 2 times 2 MIMO system with...
Recent theoretical and simulation studies reveal that closely coupled antennas with appropriately chosen impedance matching loads can yield desirable MIMO capacity. The performance sensitivity of a 2 x 2 MIMO system with coupled half- wavelength dipoles and single-port decoupling matching networks is presented in this paper. We show that the optimal single-port matching impedance in the sense of maximizing...
Measuring the performance of compact MIMO receive antennas is always a critical issue in wireless communication studies. Plenty of work has been done to improve the system performance including introducing proper matching networks at the receive end. In this paper, we derive a network MIMO system model from Z-parameter point of view containing arbitrary matching networks. It is the first time that...
Power collection at the receive end in a multi-input multi-output (MIMO) system is critical to information recovery, especially for compact receive arrays. In this work we discuss the correct analytical received power expression with various matching impedances which maximize the received power of compact antenna array. The power differences and power collection ability of the optimum impedance match...
Recent theoretical and simulation studies reveal that closely coupled antennas with appropriately chosen impedance matching loads can yield desired characteristics of small antenna correlation coefficients and/or high received power levels. However, no experiment has been performed to verify these claims. Here, we describe an experimental setup used to investigate the correlation and received power...
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