小型化窄条形宽带柔性天线

Miniaturized Narrow Strip Wideband Flexible Antenna

设计了一款小型化窄条形宽带柔性天线,该天线由辐射片和带有短路枝节的共面波导金属地构成,整体尺寸为24.5 mm×5.0 mm×0.1 mm。通过采用带有短路枝节的共面波导金属地、新共面波导结构、两个U型缝隙、馈线倾斜焊接等方法,有效增加了阻抗带宽,且与常规柔性天线相比尺寸减小70%。测试结果表明,天线用于超宽带定位系统中的智能手表时,工作频段覆盖3.27~4.55 GHz,带宽内增益大于2.4 dBi,不圆度小于0.95 dB。

A miniaturized narrow strip broadband flexible antenna was designed,which was composed of a radiator and a coplanar waveguide metal ground with short circuited branches.The overall size of the antenna is 24.5 mm×5.0 mm×0.1 mm.By using the methods of coplanar waveguide metal ground with short circuit branches,new coplanar waveguide structure,two U-shaped slots,and the inclined welding of the feeder,the impedance bandwidth is effectively increased,and the antenna size is reduced by 70%compared with the conventional flexible antenna.The test results show that when the antenna is used in the smart watch in the ultra-wideband positioning system,the working frequency band covers 3.27 GHz to 4.55 GHz,the gain in the bandwidth is greater than 2.4 dBi,and the out of roundness is less than 0.95 dB.