| 摘要 |
<p>PROBLEM TO BE SOLVED: To resonate an existing dipole element to another frequency different from the one in resonance with the dipole element and to allow the dipole element to radiate, without giving effect on the existing dipole element. SOLUTION: In the dipole antenna system 30 of this invention where dipole elements 12a, 12b; 16a, 16b made of a metallic foil with an optional width at both faces of a dielectric board 11 and respectively resonated with 1st and 2nd frequencies f1, f2 are connected to feeders 14a, 14b via a feed point nearly in the middle, in order to resonate the dipole elements 12a, 12b, 16a, 16b at frequencies different from the 1st and 2nd frequencies f1, f2 and to allow them to radiate waves, a non-powered element 32 having a length suitable for the frequency different from the 1st and 2nd frequencies f1, f2 is placed above the dipole elements, that is, in front on the center axis line of the dipole elements in parallel with the dipole elements.</p> |
