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A short review of the Receiving-Mutual-Impedance Method (RMIM) for mutual coupling compensation in direction finding applications using linear array is conducted. The differences between the Conventional-Mutual-Impedance Method (CMIM) and RMIM, as well as the three different determination methods for Receiving Mutual Impedance (RMI), will be discussed in details. As an example, direction finding with better accuracies is used for demonstrating the superiority of mutual coupling compensation using RMIM. Signal processing algorithms of most antenna array applications usually assume that interactions of signals and antenna elements are independent to each other. Such assumption is not necessary to be true especially when the antenna elements are closely spaced.
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