The coplanar waveguide installed planar dipole antenna is proposed and numerically analyzed. The design frequency is 300 MHz. The coplanar waveguide is located from the center point to the offset feed point on the dipole antenna. The input impedance and radiation characteristics of this antenna is almost same as those of the offset fed planar dipole antenna. In the numerical analysis, the electromagnetic simulator WIPL-D based on the Method of Moments is used.