ANTENNA SYSTEM AND WIRELESS DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an antenna system that uses the circularly polarized waves as the main wave and can easily and freely change the direction of the main radiation and the circulation direction of the circularly polarized waves. SOLUTION: Antenna elements 2 and 3 are provided in a wireless device 1, the angle of the revolving plane of the antenna element 2 is made approximately 90°to the direction of the antenna element 3, and the length L1 of the antenna element 2 is made a little larger than half the wavelength (about 0.53 of the wavelength) and the length L2 of the antenna element 3 a little smaller than half the wavelength (about 0.47 of the wavelength). Further, the antenna element 2 is mechanically supported by a rotary section 4 in a way free to turn against the circuit board 5 of the wireless device 1 so that the direction of the antenna element 2 can be changed within the XZ plane. COPYRIGHT: (C)2004,JPO&NCIPI