具有抑制谐波辐射特性的频选天线罩设计

Design of Frequency Selective Radome with Harmonic Radiation Suppression

论文设计了一款具有较高谐波辐射抑制特性的频选天线罩,以频选天线罩在天线工作频带具有较好的阻抗匹配特性,以及天线工作频带对应的二次谐波频带,具有较好的抑制特性为约束条件,设计了频选天线罩的单元结构类型和单元尺寸。在选定频选天线罩与天线之间间距的情况下,对频选天线罩+天线系统的阻抗特性、主频辐射特性、以及谐波辐射特性进行了仿真分析,仿真结果表明,该频选天线罩对天线工作频带内的阻抗特性和主频辐射特性影响较小,对天线二次谐波辐射具有较好的抑制,最高具有约10dB的抑制能力。

In this paper,a frequency selective radome with higher harmonic emission suppression characteristics is designed.The frequency selective radome has good impedance matching characteristics in the antenna operating frequency band and the sec⁃ond harmonic frequency band corresponding to the working frequency band of the antenna.The good suppression characteristics on the band are constraints,and the cell structure type and cell size of the frequency selective radome are designed.After determining the spacing between the radome and the antenna,the impedance characteristics,the main frequency radiation characteristics and the harmonic radiation characteristics of the frequency selective radome+antenna system are simulated and analyzed.The simulation results show that the frequency selection radome has less influence on the impedance characteristics and the main frequency radia⁃tion characteristics in the working frequency band of the antenna,and has better suppression of the second harmonic radiation of the antenna,and has a suppression capability of up to about 10dB.