| 摘要 |
<p>In a microstrip antenna having a radiation conductor (12) and a ground conductor (13) sandwiching a dielectric substrate (11), the spacing between said radiation conductor (12) and said ground conductor (13), or the thickness of the dielectric substrate (11), is larger at the peripheral portion of those conductors than at the central portion. Because of the large spacing at the peripheral portion, the impedance at the peripheral portion where electromagnetic wave is radiated is close to the free space impedance, and the operational frequency band becomes wider than that of a prior microstrip antenna.</p> |
