  The demand for an effective tool to help in the design of ion cyclotron radio
frequency (ICRF) antenna system for fusion experiment has driven the
development of predictive codes. A new electromagnetic code based on the method
of moments (MOM) is described in the paper. The code computes the
electromagnetic field by the solution of the electric field integral equation.
The structure of ICRF antennas are discretized with triangular mesh. By using
the new code, the scattering parameter and the surface current are given and
compared with the result by commercial code CST. Moreover, the power spectra
are studied with different toroidal phases for heating and current drive. Good
agreement of simulation results between the new code and CST are obtained. The
code has been validated against CST for EAST ICRF antenna.
