MULTIBAND ANTENNA

PROBLEM TO BE SOLVED: To provide a multiband antenna, in which a radiation line of which one end is connected with a feeding point and the other end is an open end is formed as a loop-like line having a return part in the middle, capable of easily performing a frequency adjustment for each frequency band while accomplishing, with space saving, a multiband antenna which resonates over a plurality of frequencies, and is capable of widening bands and obtaining excellent gain and radiation characteristic within each frequency band by providing a capacitive coupling section in which a part of the line is disposed face-to-face via dielectrics. SOLUTION: A multiband antenna is provided in which a line of which one end is connected with a feeding point and the other end is an open end is returned in the middle to become a loop-like line, a capacitive coupling section is provided in a part of which the dielectrics are disposed, and which resonates over a plurality of frequencies. COPYRIGHT: (C)2009,JPO&INPIT