| 摘要 |
PROBLEM TO BE SOLVED: To provide a portable broadband antenna in which an antenna element can be extended and contracted with a single material and which is easy to carry and can be configured at low cost, and can achieve high bandwidth. SOLUTION: An antenna cover 21 comprises a lower cover 22a and an upper cover 22b, and a first antenna element 24 is arranged at the center of the lower cover 22a. The first antenna element 24 is configured so as to be foldable by providing a rectangular metal plate with horizontal folding lines at prescribed intervals, wherein a base part 24a provided at a lower end part is fixed to a bottom plate 23 of the lower cover 22a, and an upper side of the element is stuck to the upper cover 22b. In the lower cover 22a, a second flat plate-like antenna element 27 is mounted between the bottom plate 23 and an outer cover 26. Power is fed to a feed point 25 of the first antenna element 24 and the second antenna element 27 by a power supply cable 29. The first antenna element 24 receives radio waves while the antenna element is extended and is folded and stored in the antenna cover 21. COPYRIGHT: (C)2009,JPO&INPIT
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