A new set of travelling-standing-wave (TSW) basis functions are proposed for curved triangular patch in this paper. This kind of bases is not only able to describe the standing component of induced surface current but also able to simulate the phase variation of induced current accurately. The authors used these basis functions to discrete surface integral equation (SIE) with a series of coarse meshes (even larger than 2λ) to calculate the electromagnetic (EM) scattering from the perfect electric conductor (PEC) targets with method of moment (MoM). Numerical experiments indicate that the MoM-TSW scheme even has more advantages than the MLFMA-CRWG scheme in the aspects of computational efficiency and memory storage.

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