By using above equation (1), we confirmed that relation of the Epeak and Pnm. Thus,
if input power (Pnm) is determined, the expected peak electric field is increase
about root of the input power. These results of the each type show in Tab. 1. and
the peak electric field of proposed type3 is decreased. Compared to type1 and
type 2, the electric field is decreased about 5.2 % and 7.3 %.