| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna which can enhance a gain, and can exclude negative influences exerted on the antenna from the peripheral environment for mounting the antenna such as influences from an installed metal plate, etc., and can be assembled into an apparatus. SOLUTION: An antenna A which radiates electric waves at a central frequency is structured by an antenna body 1 and a ground conductor wire 2 connected to an earth side of a coaxial cable C for feeding to the antenna body 1. The antenna A is provided in a loop manner so as to enclose the antenna body 1 by extending the ground conductor wire 2 from a reference point O, and so as to have a terminal Q1 and a terminal Q2 which are partially cut off. A length from the reference point O to the terminal Q1 is formed so as to be 1/4 or integer multiple of a wavelength of electric waves at the central frequency. |
