Design, Analysis, and Optimization of the Array of Axial Rectangular Slots on a Cylindrical Waveguide
Design, Analysis, and Optimization of the Array of Axial Rectangular Slots on a Cylindrical Waveguide
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DOI：
10.1109/access.2021.3092997
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发表时间：
2021
期刊：
影响因子：
3.9
通讯作者：
M. Masouleh;A. K. Behbahani;M. Adjouadi
中科院分区：
文献类型：
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作者：
M. Masouleh;A. K. Behbahani;M. Adjouadi
在目前的工作中，第一次，矩形槽阵列轴向放置在一个圆柱形波导的设计方程的驱动和介绍，使它有可能获得非对称和非宽边图案具有更高的带宽。最小二乘方法，然后用于与指定的旁瓣电平的辐射方向图合成和阵列输入阻抗匹配。为了优化，误差函数由阻抗匹配、阵列方向图综合和缝隙设计方程三项组成。为了使误差函数最小化，采用遗传算法结合共轭梯度法，并定义了槽的几何特征。这一过程提高了设计速度，并提供了一种手段来合成任何所需的模式的轴向矩形槽阵列上的圆柱波导。数值和制造的例子作为说明所提出的综合方法。所提出的方法的结果进行了验证，通过使用商业软件高频结构模拟器（HFSS）在比较所提出的原型的制造天线工作在9 GHz的频率获得的测量结果。
In the current work, for the first time, the design equations for an array of rectangular slots axially placed on a cylindrical waveguide are driven and presented, making it possible to attain asymmetrical and non-broadside patterns with higher bandwidths. The method of least squares is then used for both the radiation pattern synthesis with the specified side lobe level and the array input impedance matching. For optimization, the error function comprised of the three terms of impedance matching, array pattern synthesis, and slot design equations is constructed. To minimize the error function, the genetic algorithm combined with the conjugate gradient method is utilized and the geometrical characteristic of the slots defined. This procedure increases the design speed and provides the means to synthesize any desired pattern for an array of axial rectangular slots on a cylindrical waveguide. Numerical and fabrication examples are presented as illustrations of the proposed synthesis method. The results of the proposed method are verified by using the commercial software High-Frequency Structure Simulator (HFSS) in comparison to measurement results obtained out of the proposed prototype of a fabricated antenna operating at the frequency of 9 GHz.