This study proposes a design of a double-sided printed dipole (DSPD) antenna array with a low first sidelobe level (FSLL) for interference suppression. The proposed array consists of ten DSPD antennas based on the Rogers RO4003C substrate ( ɛ_r = 3.55). The FSLL has been compressed by imposing a single null at the centre of the first sidelobe. The excitation power distribution of the array has been calculated by using the bat algorithm with the amplitude-only control technique and has been implemented by a series-fed network. A back reflector, which is based on an FR4 substrate ( ɛ_r = 4.4), has been used to improve the maximum gain. The simulation results show that the FSLL can be reduced with a null deep level (NDL) of −40 dB in the E -plane at the frequency of 3.5 GHz, while the maximum gain of the array is around 17.7 dBi, and the bandwidth is 600 MHz (3.3–3.9 GHz) with −10 dB of S ₁₁ . A prototype of the proposed DSPD antenna array has been fabricated and measured. A good agreement can be achieved between simulation and measurement results.

中文翻译：

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基于bat算法的线性双面印刷偶极子阵新设计抑制第一旁瓣方向

这项研究提出了一种用于抑制干扰的，具有较低的第一旁瓣电平（FSLL）的双面印刷偶极（DSPD）天线阵列的设计。建议的阵列由十个基于Rogers RO4003C基板的DSPD天线组成（ ɛ _[R= 3.55）。通过在第一个旁瓣的中心施加单个null来压缩FSLL。阵列的激励功率分布已通过使用bat算法和仅幅度控制技术进行了计算，并已通过串联馈电网络实现。背面反射器，基于FR4基板（ ɛ _[R= 4.4），已用于提高最大增益。仿真结果表明，可以在-40 dB的零深度电平（NDL）下降低FSLL。Ë 平面处于3.5 GHz频率，而阵列的最大增益约为17.7 dBi，带宽为600 MHz（3.3–3.9 GHz），其中-10 dB 小号 ₁₁ 。所提出的DSPD天线阵列的原型已经制作完成并进行了测量。模拟和测量结果之间可以达成良好的协议。