姚华飞,邱琳琳,王安康,等. 高增益低旁瓣宽扇形波束脊形波导缝隙天线阵列设计[J]. 电波科学学报,2024,39(3):1-8. DOI: 10.12265/j.cjors.2023247
      引用本文: 姚华飞,邱琳琳,王安康,等. 高增益低旁瓣宽扇形波束脊形波导缝隙天线阵列设计[J]. 电波科学学报,2024,39(3):1-8. DOI: 10.12265/j.cjors.2023247
      YAO H F, QIU L L, WANG A K, et al. Design of high-gain low-sidelobe wide-sector beam slotted ridge waveguide antenna array[J]. Chinese journal of radio science,2024,39(3):1-8. (in Chinese). DOI: 10.12265/j.cjors.2023247
      Citation: YAO H F, QIU L L, WANG A K, et al. Design of high-gain low-sidelobe wide-sector beam slotted ridge waveguide antenna array[J]. Chinese journal of radio science,2024,39(3):1-8. (in Chinese). DOI: 10.12265/j.cjors.2023247

      高增益低旁瓣宽扇形波束脊形波导缝隙天线阵列设计

      Design of high-gain low-sidelobe wide-sector beam slotted ridge waveguide antenna array

      • 摘要: 提出了一种具有高增益低副瓣的脊形波导缝隙阵列天线,中心工作频率为24.125 GHz,其包括一个八路馈电网络和一个尺寸为400 mm×65 mm的8×40辐射缝隙。通过波束合成方法提取天线阵列的期望激励分布,采用截止模式功率分配器灵活控制功率比。使用三维电磁仿真软件HFSS综合仿真计算,在中心频率处,获得仰角平面上的旁瓣电平(sidelobe level, SLL)和半功率波束宽度(half power beam width, HPBW)分别为−20.9 dB和54.5°、方位角平面上的SLL和HPBW分别为−27.8 dB和2.5°、峰值增益为23.2 dBi,仿真结果与理论分析一致。此天线可以同时实现低旁瓣的宽扇形波束,覆盖较宽的检测范围,并减轻来自其他方向的干扰,具有应用于空中探测、反无人机、气象雷达和成像雷达的潜力。

         

        Abstract: In this paper, a slotted ridge waveguide antenna array(SRWAA) with high-gain and low-sidelobe and a center frequency of 24.125 GHz is proposed, consisting of an eight-way feeding network and an 8×40 radiating slot with a dimension of 400 mm×65 mm. The expected excitation distribution for the antenna array is extracted by beam synthesis method. By using a cut-off-mode power divider, the power ratio can be flexibly controlled. The sidelobe level(SLL) and half-power beam width(HPBW) in elevation plane are −20.9 dB and 54.5°, and the SLL and HPBW in azimuth plane are −27.8 dB and 2.5° respectively, and the peak gain is 23.2 dBi by using 3D electromagnetic simulation software HFSS. The simulation results are in good agreement with the theoretical analysis. The SRWAA can realize wide-sector beams with low-sidelobe at the same time, which covers a wide detection range and mitigate the interference from other directions. This work has the potential to be applied to air detection, antidrone, meteorological radar, and imaging radar.

         

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