| 摘要 |
PROBLEM TO BE SOLVED: To provide a loop antenna capable of efficiently transmitting/receiving radio waves of a plurality of frequencies.SOLUTION: The loop antenna includes: a first loop antenna 10 which is excited at a first resonance frequency; a second loop antenna 20 which has larger inductance than the first loop antenna 10 at the first resonance frequency and is excited at a second resonance frequency lower than the first resonance frequency; and connection parts 30 which electrically connect the second loop antenna 20 and the first loop antenna 10 at two points so that the second loop antenna 20 and the first loop antenna 10 form one electrical loop and thus can be excited as one loop antenna. |
