Study on the Accuracy Improvement of the Second-Kind Fredholm Integral Equations by Using the Buffa-Christiansen Functions with MLFMA

Figure 7

The normalized RMS of RCS calculated by the RWG-MFIE, RWG-EFIE, and NBC-MFIE as a function of number of unknowns for a PEC cube with 2 m edges at 0.3 GHz.