Efficient method of moment for calculating radar cross section (RCS) of aircraft

In the full paper, we explain our efficient method of moment in some detail. In this abstract, we just add some pertinent remarks to listing the three topics of explanation. The first topic is: the method of moment. The second topic is: the influence of the various geometrical shapes of target aircraft configuration on the induced surface currents. In the second topic, we derive eqs. (6) and (7); our relatively lengthy discussion of them allows us to gain an insight into the strength of coupling among induced surface currents as related to the geometrical shapes of target aircraft configuration. The third topic is: numerical computation and the analysis of computation results. In the third topic, we utilize the insight gained in the second topic to construct sparse matrices which can greatly reduce the computation time at almost no cost in precision. The three subtopics of the third topic are: the RCS calculation of a metallic cylinder (subtopic 3.1), the RCS calculation of a wing (subtopic 3.2), and the RCS calculation of aircraft configuration (subtopic 3.3). We use the sparse matrices to calculate the electromagnetic scattering of the target aircraft configuration. The numerical calculation results, summarized in tables and figures in the full paper, show preliminarily that our method of moment using sparse matrices takes around 8% of the time taken by the conventional method of moment.