一种平面结构的WWAN/LTE手机天线设计

提出了一种平面结构的WWAN/LTE多频段手机天线。该天线将平面倒F天线、E形单极子天线以及嵌入集总元件结合在一起,使天线产生不同的谐振。利用集总元件可改善匹配,增加低频段的谐振长度。天线面积为53.1 mm×15.0 mm,结构简单,无需使用二极管和金属边框或复杂的3D结构就可以实现WWAN/LTE全频段覆盖。测试结果表明,天线在反射系数-6 dB以下的频率为657~950 MHz和1 700~2 670 MHz,天线增益在低频时高于0.5 dBi,高频时在1.20~1.96 dBi之间。该设计的性能满足WWAN/LTE手机天线的要求。

Multiband LTE-A/WWAN Antenna for a Tablet

In this paper, an internal multiband antenna is proposed for LTE-A/WWAN wireless applications in tablet computer. The proposed antenna is configured to have two branch radiators. These two branch radiators are a U-shaped driven monopole and a nonuniform wrapped inverted U-shaped monopole. The impedance bandwidths across dual operating bands are 89.7 MHz and 4185 MHz at the LTE-A/WWAN bands. Various techniques, such as branching and parasitic element are used to enhance the antenna’s bandwidth, the matching, and the size of the proposed antenna. The antenna is presented on an area of 50 × 15 mm2. Experimental results of this antenna show nearly omni-directional coverage and stable gain variation across the LTE-A/WWAN bands.

移动终端小尺寸平面LTE/WWAN天线设计

本文设计了一款应用在移动终端的双频段(704~960 MHz和1 710~2 170 MHz)多频带可调谐LTE/WWAN内置天线。信号经过微带耦合反馈给天线的PIFA枝节,同时调整匹配电路使天线在不同的谐振点达到50ohm匹配,拓展天线低频带宽。实物测量结果:天线效率大于20%,回波损耗小于-6 dB。与文献中报道的LTE天线相比,此天线具有结构简单、成本低、实用性强等特点,适合应用在便携式通信设备中。

小型化超宽带十频段移动终端天线设计

研究了小型化双层微带天线频带展宽的方法,设计了一款小型化超宽带十频段LTE/WWAN手机天线,天线尺寸仅有36 mm×8 mm×0.8 mm。该天线通过地枝节耦合技术拓宽高频带宽,再通过集总加载技术调节阻抗匹配,拓宽低频带宽。测试结果表明,该方法能有效展宽天线带宽,能够覆盖LTE700/GSM850/900/DCS1800/PCS1900/UMTS2100/LTE2300/2500八个频段,并且满足Bluetooth及WIFI频段内S11小于-10 dB的要求,与传统手机天线相比具有尺寸更小、易调谐、结构简单等优点,具有良好的辐射效率和辐射增益。