可变倾角连续断面节阵列天线方向图理论模型研究

Theoretical Model for Patterns of the Variable Inclination Continuous Transverse Stub Antenna

针对可变倾角连续断面节阵列(VICTS)天线波束扫描和盘面转动角度之间的非线性关系的计算难题,提出一种基于动态坐标系的VICTS天线方向图理论模型,相比于已有的方向图计算方法,该模型实现任意幅度分布与阵列口径的VICTS天线方向图计算,并在近零的盘面转动角度也能实现高精度.波束指向的理论计算结果与全波仿真结果一致,验证该理论模型的有效性和准确性,有效地解决VICTS天线动态和非线性的波束控制难题.

A theoretical model based on the dynamic coordination system for patterns of variable inclination continuous transverse stub(VICTS) antenna is proposed. The theoretical model is utilized to reveal the nonlinear relationship between the angular position of beam and the rotation angle of the radiation layer. Compared to previous method of pattern calculation, the theoretical model can calculate pattern of VICTS antenna with arbitrary amplitude distribution and arbitrary aperture shape. Both the full-wave simulations and computation of the theoretical model are carried out. The calculation errors of the angular position of beam between the proposed method and the full-wave simulation are less than 1°. By using the proposed model, the problem of nonlinear and dynamic beam steering in the VICTS antenna servo control system can be solved.