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Design and Optimization for 77 GHz Series-Fed Patch Array Antenna Based on Genetic Algorithm

机译：基于遗传算法的77 GHz串联馈电贴片阵列天线设计与优化

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摘要

This paper proposes a method for designing a 77 GHz series-fed patch array antenna. Based on the traditional genetic algorithm, the study explores different array topologies consisting of the same microstrip patches to optimize the design. The main optimization goal is to reduce the maximum sidelobe level (SLL). A 77 GHz series-fed patch array antenna for automotive radar was simulated, fabricated, and measured by employing this method. The antenna length was limited to no longer than 3 cm, and the array only had a single compact series with the radiation patch about 1.54 mm wide. In the genetic algorithm used for optimization, the maximum sidelobe level was set equal to or less than −14 dB. The measurement results show that the gain of the proposed antenna was about 15.6 dBi, E-plane half-power beamwidth was about ±3.8°, maximum sidelobe level was about −14.8 dB, and H-plane half-power beamwidth was about ±30° at 77 GHz. The electromagnetic simulation and the measurement results show that the 77 GHz antenna designed with the proposed method has a better sidelobe suppression by over 4 dB than the traditional one of the same length in this paper.
机译：本文提出了一种设计77 GHz串联馈电贴片阵列天线的方法。基于传统的遗传算法，研究探索了由相同的微带贴片组成的不同阵列拓扑，以优化设计。主要的优化目标是降低最大旁瓣电平（SLL）。通过这种方法模拟，制造和测量了用于汽车雷达的77 GHz串联馈电贴片阵列天线。天线长度被限制为不超过3厘米，并且该阵列只有一个紧凑系列，辐射贴片宽约1.54毫米。在用于优化的遗传算法中，最大旁瓣电平设置为等于或小于-14 dB。测量结果表明，拟议天线的增益约为15.6 dBi，E平面半功率波束宽度约为±3.8°，最大旁瓣电平约为-14.8 dB，H平面半功率波束宽度约为±30 °在77 GHz下。电磁仿真和测量结果表明，与本文相同长度的传统天线相比，采用该方法设计的77 GHz天线具有更好的旁瓣抑制效果，超过4 dB。

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