Miniaturized quadruple-band ground radiation antenna for mobile devices

A miniaturized quadruple-band ground radiation antenna within a small clearance of 7 mm × 10 mm × 1 mm is proposed for 1.575 GHz GPS band, 2.4 and 5 GHz Wi-Fi bands, as well as 3.5 GHz WiMAX band in mobile devices. The -6 dB (VSWR <; 3) impedance bandwidths of 38, 121, 114, and 542 MHz are achieved, covering the GPS band, Wi-Fi 2.4GHz band, WiMAX 3.5GHz band, and Wi-Fi 5 GHz band, respectively.