A low-profile, bent and shorted planar monopole antenna with reduced backward radiation for mobile phones

摘要

By bending a planar monopole into an inverted-U shape and short-circuiting one end to the ground, a novel low-profile monopole antenna with reduced backward radiation is obtained. The proposed antenna is easily fed by using a capacitively coupled feed, and is suitable for applications in mobile phones for providing reduced radiation toward the user's head. A prototype of the proposed antenna for DCS operation (1710-1880 MHz) is constructed, and measured and simulated results are presented.