一种短路加载层叠式双频双极化微带天线

Short-Circuit Loading Stacked Dual-Frequency Dual-Polarized Microstrip Antenna

结合经典公式、模式展开理论以及HFSS软件仿真优化,设计了一种短路加载层叠式双频双极化微带天线。该天线采用双层贴片构架,引入电感分量L的短路加载等措施,有效展宽了天线频带宽度。基于项目需求,设计、加工了一套天线。测试结果表明,该天线在L频段(1.65～1.75 GHz),相对阻抗带宽约6%(VSWR≤2),带内增益大于8.2 dBi;在C频段(3.40～4.20 GHz),相对阻抗带宽约21%(VSWR≤2),带内增益大于7.5 dBi。可见,所提分析方法简明有效,可供同类型双层或多层微带天线借鉴。

Combined with classical formula, mode expansion theory and HFSS software simulation optimization, a short-circuit loading stacked dual-frequency dual-polarized microstrip antenna is designed. The antenna adopts a double-layer patch structure, and the short-circuit loading of inductance component L is introduced, so as to effectively broaden the antenna bandwidth. Based on the project requirement, a set of antennas is designed and manufactured. The test results indicate that the relative impedance bandwidth of the antenna is about 6%,the voltage standing wave ratio less than 2,and the in-band gain more than 8.2 dBi in L-band(1.65~ 1.75 GHz);in C band(3.40~ 4.20 GHz),the relative impedance bandwidth of the antenna is about 21%,and the in-band gain more than 7.5 dBi. It can be seen that the proposed analysis method is simple and effective, and can be used for reference by the same type of double-layer or multi-layer microstrip antenna.