Antenna

摘要

An antenna suitable for portable radios in which two planar conductive boards 1, 2 are disposed in parallel to one another and spaced apart by a distance which is small when compared with received radio wavelengths. A dielectric frame 3 is disposed between the two planar conductive boards to maintain the preselected distance. Arbitrary feeding points are selected along the edges of the two conductive boards and at least one conductor 4 is positioned at an arbitrary selected feeding point to short-circuit the two conductive boards. In some cases a plurality of arbitrary feeding points may be selected along the edges of the two conductive boards and a plurality of conductors positioned at the plurality of arbitrary selected feeding points which short-circuits the conductive boards. The position of the plurality of conductors which short-circuit the conductive boards may be automatically changed to provide the most desirable condition responsive to the direction of the radio waves. ……