| 摘要 |
Provided is an antenna that can be used in a wide band and can arbitrarily adjust the working frequency band to a higher or lower frequency band. An antenna 10A includes a resonant conductor tube 12 located on the outside of a feeding section 18 of an unbalanced feed member 11 and covering the feeding section 18, a ground conductor tube 13 located on the outside of a passive section 19 of the unbalanced feed member 11 and covering the passive section 19, and a connection conductor guide 14 located between the conductor tubes 12 and 13 and the unbalanced feed member 11. In the antenna 10A, the conductor tubes 12 and 13 and the unbalanced feed member 11 are electrically fixed to the connection conductor guide 14 via a fixing unit, and the feeding section 18 of the unbalanced feed member 11 has an exposed portion 20 with a predetermined size, the exposed portion 20 exposed from the resonant conductor tube 12 outward in the length direction thereof. |
