| 摘要 |
PROBLEM TO BE SOLVED: To integrate an antenna and a main case body, to miniaturize them and to transmit and receive both a vertically polarized wave and a horizontally polarized wave, even when a specified small power radio device or the like is used by constituting a central power feeding antenna, which is installed close to a metallic case body, so as to be constituted into an L shape. SOLUTION: A metallic case body 11 stores a radio equipment main body for radio master equipment 7, a power feeding cable 12 connects the radio equipment main body and an antenna 4b, and a power feeding part 13 connects the power feeding cable 12 and the antenna 4b. A vertical element 14 is arranged in the vertical direction of the side of the metallic case body 12, is provided in a way such that a vertically polarized wave is transmitted and received, a horizontal element 15 is arranged in the front and back direction of the side of the metallic case body 12 and is provided in a way such that it transmits and receives a horizontally polarized wave. A dipole antenna which is an L-shaped central power feeding antenna 4b, is formed by the vertical element 14 and the horizontal element 15. The L-shaped dipole antenna is installed on both sides of a metallic case body 11, and both antennas constitute a diversity antenna.
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