七频段金属外壳手机天线的设计

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7 mm×70 mm。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。

Hetpa-band antenna for the mobile phone of metal casing

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 2G, 3G, 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.