A novel method to analyze the mutual coupling of antennas with signal and system concept

The paper presents a novel method to analyze the mutual coupling of antennas by means of digital signal processing on the basis of a signals and systems concept. In this method, the EM characteristics of the antennas are considered as the input signals, the structure of the array as the system or transmission function, while the mutual impedance of the antennas or other EM characteristics can be regarded as the system response of the input signals. Then, the antenna array can be seen as a whole signal and system, and can be processed with DSP. In this manner, the method brings the signal and system concept to EM problem solving. Finally, the mutual impedance between linear dipoles is analyzed. Compared with the literature, the validity of this novel method can be proved.