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Radiation Pattern Synthesis and Mutual Coupling Compensation in Spherical Conformal Array Antennas

机译:球形保形阵列天线中的辐射图案合成与互联耦合补偿

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摘要

This paper presents a novel technique based on Hybrid Spatial Distance Reduction Algorithm (HSDRA), to compensate the effects of deformity and mutual coupling occurred due to surface change in conformal arrays. This antenna surface deformation shifts the position of null points and loss of the main beam resulting in reduced antenna gain along with substantial undesirable effects on the antenna performance. The proposed algorithm, which cumulatively incorporates the Linearly Constraint Least Square Optimization (LCLSO) and Quadratically Constraint Least Square Optimization (QCLSO) techniques, is formulated to minimize/reduce the absolute distance between the actual (simulated/measured) radiation pattern and the desired radiation pattern while keeping the direction of mainbeam and nulls position under control. In particular, a 4x4 conformal microstrip phased array from planar surface is deformed to prescribe spherical-shape surface with various radii of curvature, is validated. For the enhancement of Gain of the conformal array antenna, Gain Maximization Algorithm is also proposed, the simulated results of which is compared to the traditional Phase compensation technique and unconstraint least squares optimization. The analytical results for both planar and spherical deformed configurations are first evaluated in MATLAB and then validated through Computer Simulation Technology (CST).
机译:本文介绍了一种基于混合空间距离减少算法(HSDRA)的新型技术,以补偿由于集合阵列的表面变化而发生的畸形和相互耦合的影响。该天线表面变形使空点的位置和主光束的损耗变化,导致天线增益的降低的天线增益以及对天线性能的基本不希望的影响。所提出的算法累积地结合了线性约束最小方优化(LCLSO)和二次约束最小方形优化(QCLSO)技术,以最小化/降低实际(模拟/测量)辐射图案和所需辐射之间的绝对距离图案在控制下保持MainBeam的方向和无效位置。特别地,从平面表面的4x4共形微带相控阵变形以规定具有各种曲率的球形表面,验证。为了增强共形阵列天线的增益,还提出了增益最大化算法,其模拟结果与传统的相位补偿技术和非纵向最小二乘优化进行了比较。第一次在MATLAB中评估平面和球形变形配置的分析结果,然后通过计算机仿真技术(CST)进行验证。

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