PLANAR ANTENNA

PROBLEM TO BE SOLVED: To provide a planar antenna which facilitates the adjustment of input impedance. SOLUTION: On the surface of a first dielectric substrate having a rectangular hole 12, a radiation conductive film 13 is formed. On the front surface, the rear surface and the side surface of a second dielectric substrate 14, a vibration proof conductive film 15, a ground conductive film 16 and a feeder electrode 18 are formed, respectively, and the vibration proof conductive film 15 is connected with the feeder electrode 18. Further, the first and second dielectric substrates 11 and 14 are integrated and the tip part of the vibration proof conductive film 15 is exposed from the hole 12 of the first dielectric substrate 11.