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

Figure 6

The normalized RMS of RCS calculated by the NBC-MFIE, CRWG-MFIE, CRWG-EFIE, and NCBC-MFIE as a function of number of unknowns for a PEC sphere with radius of 1 m at 1.2 GHz.