七频段金属外壳手机天线的设计

Hetpa-band antenna for the mobile phone of metal casing

提出了一种应用在金属外壳手机终端上,实现了-6dB以下的带宽为800~960 MHz,1 710~3 000 MHz频段的天线设计。为了保证辐射性能和所需带宽,在金属的手机外壳的短边上开宽为2mm的U型槽,在馈电处采用电容匹配和一个可切换的电路接地枝节实现GSM850/900(824~960 MHz),DCS/PCS/UMTS2100(1 710~2 170 MHz),LTE2300/2500(2 300~2700 MHz)七个频段的覆盖。手机尺寸为152 mm×72 mm×6.8 mm,天线的净空区域为7mm×70mm。通过实物测试,手机天线的辐射效率,在低频824~960 MHz频段中为38%~46%,在1 710~2 700 MHz中,辐射效率为可达38%~64%。该天线具有很好的辐射性能,适合应用于金属外壳的移动终端中。

A hetpa-band antenna design for the mobile phone of metal casing has been proposed.The antenna can operate at 800-960 MHz,1 710-3 000 MHz,for 2 G,3 G,and LTE bands.To guarantee the performance of the antenna,U-shaped slot is etched on the metal casing.By taking a feed matching capacitor and a switch circuit,the proposed antenna is capable of covering GSM850/900（824-960 MHz）,DCS/PCS/UMTS2100（1 710-2 170 MHz）,LTE2300/2500（2 300-2 700 MHz）,hetpa-band.The outside dimension of the phone is 152 mm（length）×72 mm（width）×6.8 mm（height）,a 7 m×67 mm area is excised at the top edge of the system board.The antenna prototype is fabricated and measured,and it has good radiation performance.For the 824-960 MHz,the radiation efficiency from 38%to 46%.For 1 710-2 700 MHz,the radiation efficiency is from 38% to 64%.It is appropriate for the application of mobile phone with metal casing.