The Effectiveness of the Mutual Coupling Model, Coupled Voltage to Uncoupled Currents, in Receiving Antenna Arrays

Abstract

This work examines the efficiency of the model known as “Coupled Voltages to Uncoupled Currents” for representing the mutual coupling phenomenon between the elements of a receiving antenna array. This model postulates the relationship between the couple-free currents induced in the elements of the array when receiving electromagnetic waves and the induced voltages developed at the terminals of these elements. These voltages will be contaminated by the coupled energy between the elements of the array due to retransmission when the elements are close to each other. The results of this work illustrate that using this model in the cost function of the MUSIC algorithm results in DOA estimation of signals received by a receiving antenna array with very high resolution and very low RMSE when compared with another mutual coupling model.

Keywords

• Antenna array, “Coupled Voltages to Uncoupled Currents” mutual coupling model, DOA estimation, MUSIC algorithm, and RMSE criteria.