A method for calculating electromagnetic scattering of complex targets using sparsely sampled current

Electromagnetic calculation is the main way to obtain electromagnetic scattering data of radar targets, but it is affected by computer performance and electromagnetic algorithms. Especially for electrically large targets, the calculation complexity is high. Therefore, it is necessary to optimize the calculation algorithm and improve calculation efficiency. This paper studies the distribution characteristics of complex target surface currents and proposes sparse sampling of target surface currents to obtain data. This sparse sampling method can not only effectively capture the target surface current distribution characteristics, but also achieve electromagnetic calculations of complex targets by interpolating the data with high calculation accuracy. This method reduces the cost and complexity of data collection, improves calculation efficiency, and is suitable for electromagnetic computing, radar imaging and other fields.