一种新型小型化十一频段手机天线设计

Novel and miniaturized hendeca-band antenna for mobile phones

现有手机天线结构复杂、剖面高和尺寸大,为了缩小手机天线的尺寸,研究了小型化低剖面双层微带天线频带展宽的方法,提出了一款紧凑耦合的小型化十一频段手机天线,尺寸仅为37.0mm×7.2mm.该天线通过馈电单极子和地枝节耦合技术,激发多个谐振模,拓宽高频带宽,再利用加载电感方法,使低频谐振点偏移,拓宽低频带宽.实测结果表明,该方法可以有效展宽天线频带,能够覆盖长期演进、无线广域网8个频段,并且满足全球定位系统、无线保真以及蓝牙频段内S11小于-10dB的要求,与传统微带天线相比,该天线具有尺寸更小、结构简单、频带宽等优点,具有良好的辐射增益和辐射效率.

The traditional mobile phone antenna has many disadvantages,such as complicated structure,high profile,large size.In order to reduce the size of a mobile phone antenna,a novel miniaturized mobile phone antenna with a hcndcca-band is presented in this paper by studying the method of frequency band broadening of the miniaturized low profile dual layer microstrip antenna.The size of the presented antenna is only 37.0 mm X 7.2 mm.First,by using the monopolc and the ground strip coupling technologies to excite the resonant mode,the high-frequency bandwidth of the antenna is broadened.Then,the lowfrcqucncy bandwidth of the antenna is also broadened by using the loading inductance method to shift lowfrcqucncy resonance.The measured results have demonstrated that eight LTE/WWAN bands can be covered and that the S11 of the proposed antenna is lower than-10 dB in the range of GPS,WiFi and Bluetooth bands.Compared with traditional microstrip antennas,the proposed antenna has good radiation gain and efficiency as well as the small size,simple structure and wide frequency band.