| 摘要: |
| 针对大规模圆极化相控阵天线设计中交叉极化特性评估计算量大的问题，从阵列极化合成理论出发，提出一种简化的计算方法。推导出采用顺序旋转方法形成圆极化的阵列天线的寄生交叉极化阵因子公式，提出旋转相位差值矩阵这一参数，用于对顺序旋转形成交叉极化的机理进行直观的解释。对比分析线极化、椭圆极化单元按不同顺序旋转方式构成的阵列天线的交叉极化特性优劣，列出毫米波通信工程中宽角扫描相控阵天线的单元选型方案、极化合成布阵方式选型方案，为交叉极化抑制提供了设计参考。 |
| 关键词: Ka频段卫星通信 相控阵天线设计 阵列圆极化合成 顺序旋转圆极化阵列 交叉极化抑制 |
| DOI： |
|
| 基金项目:成都工业学院校级课题(114/175043) |
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| Cross polarization suppression of sequentially rotated circularly polarized phased array |
| WEN Jian,HUANG Zhonghua,YAO Yali,ZHANG Yun,WANG Junhui,HOU Luping,LIANG Yuhong |
| (Southwest China Institute of Electronic Technology,Chengdu 610036,China;Unit 93129 of PLA，Beijing 100843,China) |
| Abstract: |
| To reduce the large-scale computing in cross polarization(XP) evaluation of circularly polarized phased array,a simplified algorithm based on polarization synthesis of array is presented.The parasitic XP array factor of sequentially rotated circularly polarized(SRCP) phased array is derived,and the expression of rotation phase differential matrix(RPDM) is used to explain the principle of parasitic XP of SRCP.The XP property of several kinds of SRCP array composed by linearly or elliptically polarized elements is compared,and the specification of element type and sequential rotation method in millimeter wave communication is listed,which gives the criteria for XP suppression of wide angle scanning phased array. |
| Key words: Ka-band satellite communication phased array antenna design circular polarization synthesis of array sequentially rotated circularly polarized array cross polarization suppression |
