On the accuracy of different boundary integral formulations for dielectric bodies using RWG and BC functions

Different formulations of the boundary integral method for dielectric bodies are evaluated on their accuracy. The formulations apply RWG and/or BC functions both as basis functions and as test functions. A systematic evaluation, measuring the order of accuracy of the different formulations, is performed for low-contrast test cases. The conclusion is that for low-contrast dielectric bodies, the CTF and Müller formulation (tested with BC functions) provide the best choice.