| 摘要 |
<p>Herein disclosed is a portable wireless device comprising a first monopole antenna section 11 having a length substantially equal to 3/4 of a wavelength of a first frequency band, an open sleeve section 12 having a length substantially equal to 1/4 of a wavelength of the first frequency band, the open sleeve section 12 being arranged under the condition that the first monopole antenna section 11 and the open sleeve section 12 are parallel to each other, and perpendicular to a line extending through one end of the first monopole antenna section 11 and one end of the open sleeve section 12, a feeding section 13 for feeding a radio frequency signal to the first monopole antenna section 11 and the open sleeve section 12 at the same time, a grounded base plate 14 made of conductive material, and a wireless circuit 15 arranged on the grounded base plate 14. The portable wireless device is useful for an ultra wideband system, and able to reduce the influence from the operator.</p> |
