| 摘要 |
<p>An antenna device with satisfactory symmetry of a directivity characteristic is provided to prevent a high-frequency current flowing in a longitudinal direction of a ground pattern from being generated in power feeding. An antenna device(10) with satisfactory symmetry of a directivity characteristic includes a ground pattern(12), a power feed element(13), a correction pattern(14), and a parasitic radiation element(15). The power feed element has a feeding point(13a) to which a power feeding signal is supplied and is installed adjacent to a short side(12a) of the ground pattern. The correction pattern projects from the short side of the ground pattern and is positioned adjacent to the power feed element. The parasitic radiation element extends on the short side. An electric field of the parasitic radiation element is set to be approximately a half less than a resonant length. The parasitic radiation element is excited by the power feed element in the power feeding.</p> |
