| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna capable of improving versatility.SOLUTION: The antenna includes a coupling element and a connection element. The coupling element includes a first open end, a second open end, and a junction positioned between the first open end and the second open end. The connection element is electrically connected to the junction of the coupling element, so that a current flows from the feeding point. An electric length between the first open end and the junction of the coupling element is an odd number multiple of a 1/4 of a wavelength λ corresponding to a frequency used for proximity radio communication. The electric length of the connection element is an odd number multiple of a 1/4 of the wavelength λ. |
