X波段加膜片式单脊波导裂缝天线的研究

发布时间：2018-02-21 08:16

本文关键词： 单脊波导裂缝天线金属膜片技术低副瓣牛顿迭代法　出处：《微波学报》2017年02期 　论文类型：期刊论文

【摘要】：等效导纳值是波导宽边纵缝天线的关键设计参数。为克服传统波导裂缝天线副瓣偏高、设计效率低下等问题,本文提出了一种单脊波导裂缝天线的改进设计方法,在传统波导裂缝阵列天线设计的基础上,利用等效导纳值对天线等效电路的影响,在裂缝单元下增加金属膜片,通过改变金属膜片的高度,优化裂缝等效导纳值,使得每个裂缝口径场分布更加接近于理论设计值,并在设计过程中使用牛顿迭代法提取导纳进一步缩短设计时间。通过设计实例表明:应用此方法设计单脊波导裂缝天线能够有效抑制副瓣电平,天线方位面副瓣电平可达到-30 dB以下;在满足主要指标要求的前提下,设计效率显著提升。
[Abstract]:The equivalent admittance is the key design parameter of the waveguide wide side longitudinal slot antenna. In order to overcome the problems of high sidelobe and low design efficiency of the traditional waveguide slot antenna, an improved design method of the single ridge waveguide slot antenna is proposed in this paper. On the basis of the traditional waveguide slot array antenna design, using the effect of equivalent admittance on the equivalent circuit of the antenna, the metal diaphragm is added under the crack element, and the crack equivalent admittance is optimized by changing the height of the metal diaphragm. So that the distribution of the aperture field of each crack is closer to the theoretical design value, In the process of design, Newton iterative method is used to extract admittance to further shorten the design time. The design example shows that the sidelobe level can be effectively reduced by using this method to design single-ridge waveguide slot antenna. The sidelobe level of the antenna azimuth plane can reach -30 dB, and the design efficiency can be improved significantly on the premise of meeting the main requirements.
【作者单位】：中国电子科技集团公司第三十八研究所微波系统研究部;孔径阵列和空间探测重点实验室;
【分类号】：TN823.24

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