一种新型高增益全向印刷天线设计

A Novel Horizontal Omni-directional Antenna with High-gain

设计了一种新型高增益全向印刷天线，由四个蚀刻在介质板上的偶板子单元组阵，结构简单，易于加工。通过优化振子形状，采用并联馈电方式、末端多节微带线匹配技术，拓展了工作带宽。偶极子两侧增加寄生振子，调整其尺寸和位置优化水平面不圆度。测试结果表明该天线在950～1300MHz频段内电压驻波比小于2（相对带宽31％），增益大于4．4dBi，不圆度小于2．4dB。

A novel horizontal omni-directional antenna the dielectric substitute make up an antenna array with a is presented with high-gain. Four dipoles etched oll simple structure and easy processing. The dipole shape is optimized and fed in corporate-fed method for bandwidth enhancing. A micro-strip matching network is employed for tuning the input impedance of the antenna. Parasitic element is utilized with adjusted size and position for well un-roundness performance. The measured result show that the proposed antenna has well impedance bandwidth in 940-1300MHz of VSWR less than 2 （relative bandwidth of 32%） w-ith gain larger than 4.3 dBi and horizontal un-roundness less than 2.4dB.