新型双极化桌形天线阵设计

Design of a Novel Dual-Polarization Table-Like Antenna Array

诸多场景都需要采用定向高增益的双极化天线。采用加载三角寄生单元增加表面电流路径以提高增益,设计了一款新型正交双线极化角馈桌形天线,并以对称反相馈电组成阵列。设计和加工一只2×2天线阵列样品为例,两组端口分别馈电。测试结果表明,该阵列谐振频率在5.8 GHz,平均阻抗带宽达到6.5%,增益约为15.5 dBi,口径效率约为76%,测试与仿真结果吻合良好。对应于中心工作频率的电尺寸为1.93λ×1.93λ×0.077λ(λ为中心频率为5.8 GHz时对应自由空间中的波长)。

Directional high gain dual polarization antenna is needed in many scenes.In order to improve the gain,a novel orthogonal dual polarization angle fed table antenna is designed by adding a triangular parasitic element to increase the surface current path,and the array is composed of symmetrical antiphase feed elements.Design and process a 2×2 antenna array sample as an example,the two groups of ports are fed respectively.The test results show that the resonant frequency of the array is 5.8 GHz,the average impedance bandwidth is 6.5%,the gain is about 15.5 dBi,and the aperture efficiency is about 76%.The electrical dimension corresponding to the central operating frequency is 1.93λ×1.93λ×0.077λ(λis the wavelength in free space when the center frequency is 5.8 GHz).