| 摘要 |
PROBLEM TO BE SOLVED: To provide a small and lightweight omnidirectional antenna. SOLUTION: A first dipole antenna 11 in which a first element 11a and a second element 11b cross substantially at right angles is formed on a printed circuit board 10, and a second dipole antenna 12 in which a third element 12a and a fourth element 12b cross substantially at right angles is formed, thereby forming the omnidirectional antenna 1. In this way, the small and lightweight omnidirectional antenna 1 can be provided. Further, the omnidirectional antenna 1 can operate in a wide band and can obtain excellent omnidirectivity. COPYRIGHT: (C)2009,JPO&INPIT
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