Abstract
The unbalanced fed planar inverted L antenna on a rectangular conducting plane is proposed and numerically analyzed. This antenna is excited between the band and its end. The width of planar element becomes narrower from the feed point to the antenna end. When the antenna size is 710mm by 56mm by 49mm, S11 less than -10dB is satisfied from 168MHz to 259MHz. In the numerical analysis, the electromagnetic simulator "WIPL-D" based on Method of Moments is used.