增加副瓣抑制機(jī)制的陣列天線波束賦形遺傳算法研究

鄭占旗; 閻躍鵬; 張立軍; 王宇灝; 張金玲; 慕福奇

doi:10.11999/JEIT160466

增加副瓣抑制機(jī)制的陣列天線波束賦形遺傳算法研究

doi: 10.11999/JEIT160466

1.
(中國科學(xué)院微電子研究所北京 100029) ②(北京郵電大學(xué)電子工程學(xué)院北京 100876)

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出版歷程
- 收稿日期: 2016-05-09
- 修回日期: 2016-12-07
- 刊出日期: 2017-03-19

Research on Genetic Algorithm of Antenna Arrays Beam Shaping with Side Lobe Suppression

1.
ZHENG Zhanqi① YAN Yuepeng① ZHANG Lijun① WANG Yuhao① ZHANG Jinling② MU Fuqi

摘要

摘要: 基于遺傳算法的激勵(lì)優(yōu)化算法是求解陣列天線波束賦形問題時(shí)常用的激勵(lì)求解算法。傳統(tǒng)遺傳算法在優(yōu)化陣列天線激勵(lì)時(shí)，對(duì)陣元天線方向圖矢量疊加獲得陣列天線合成方向圖后，與目標(biāo)方向圖做相似度判斷，經(jīng)過多次運(yùn)算獲得滿足設(shè)計(jì)要求的激勵(lì)值。然而算法中通常不關(guān)注賦形結(jié)果的副瓣抑制，導(dǎo)致陣列天線波束賦形結(jié)果副瓣抑制效果不理想。該文提出一種基于一組低副瓣波束線性疊加的波束合成機(jī)制，將合成方向圖與目標(biāo)方向圖做相似對(duì)比，結(jié)合遺傳算法的優(yōu)化求解方法，最終獲得與目標(biāo)方向圖匹配的合成方向圖，且合成方向圖具有高副瓣抑制的特性。以一款16陣元波段微帶偶極子線性陣列天線為例，該文提出的具有副瓣抑制機(jī)制的遺傳算法求得的賦形波束獲得了-27.5 的副瓣抑制效果，遠(yuǎn)遠(yuǎn)好于傳統(tǒng)遺傳算法求得的賦形波束-19 的副瓣抑制。
- 陣列天線 /
- 遺傳算法 /
- 副瓣抑制
Abstract: Excitation optimization algorithm based on Genetic Algorithm (GA) is mainly used to solve the excitation problems of array antenna beam shaping. When optimizing the excitation of array antenna by traditional genetic algorithm, the beam of array antenna is synthesized by radiation shape of elements in antenna array, and then the results will be compared with the target pattern. After several operations, the excitation will meet the deign requirements. However, in traditional genetic algorithm, neglected suppression of side lobe leads to an unsatisfactory high level side lobe. In this paper, a new method of beam synthesizing by peak beam of array antenna is proposed. By comparing the shape of synthesized beam with target beam and combining with traditional GA, the synthesized beam matching the target beam with low side lobe will be obtained. Taking a 16 elements X band micro-trip dipole linear array antenna as an example, the results of simulation show that array antenna has high level side lobe suppression at about -27.5 dBc using the method proposed in this paper, which is much better than -19 dBc side lobe suppression using traditional GA.
- Antenna arrays /
- Genetic Algorithm (GA) /
- Side lobe suppression

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