文章信息/Info

Title:

Luneburg Lens Mixed Microstructure Fusion Technology Based on the Porous Structure

文章編號(hào):

1674-3962(2025)05-0482-10

作者:

高羨明; 任曉松; 牛金召; 盧少輝; 張衍龍

陜西科技大學(xué)機(jī)電工程學(xué)院，陜西 西安 710021

Author(s):

GAO Xianming; REN Xiaosong; NIU Jinzhao; LU Shaohui ; ZHANG Yanlong

College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology,Xi’an 710021, China

關(guān)鍵詞:

龍伯透鏡; 輕量化; 混合結(jié)構(gòu); 局部插值; 水平集函數(shù); S參數(shù)反演法

Keywords:

Luneburg lens;  lightweight;  mixed structure;  local interpolation; level set function;  S-parameter inversion method

分類號(hào):

TN821+.5

DOI:

10.7502/j.issn.1674-3962.202407006

文獻(xiàn)標(biāo)志碼:

A

摘要:

針對(duì)龍伯透鏡天線的結(jié)構(gòu)輕量化問(wèn)題，提出一種融合不同類型（P型和I-WP型）的混合結(jié)構(gòu)的龍伯透鏡設(shè)計(jì)。首先對(duì)P型和I-WP型多孔結(jié)構(gòu)的水平集函數(shù)進(jìn)行并集布爾運(yùn)算，建立混合結(jié)構(gòu)的模型，利用局部插值原理保證梯度結(jié)構(gòu)連續(xù)性；基于S參數(shù)反演法計(jì)算基礎(chǔ)多孔結(jié)構(gòu)的等效介電常數(shù)，并分析混合結(jié)構(gòu)不同體積分?jǐn)?shù)占比對(duì)介電常數(shù)的映射規(guī)律；通過(guò)離散法進(jìn)行基于基礎(chǔ)多孔結(jié)構(gòu)以及混合結(jié)構(gòu)的龍伯透鏡的設(shè)計(jì)，并利用3D打印技術(shù)制備3種不同結(jié)構(gòu)的龍伯透鏡天線。在CST軟件中和微波暗室內(nèi)對(duì)不同結(jié)構(gòu)的龍伯透鏡的焦距進(jìn)行仿真和試驗(yàn)，選取標(biāo)準(zhǔn)增益喇叭進(jìn)行饋電，在焦距為10 mm處3種龍伯透鏡的增益均達(dá)到最大值，試驗(yàn)結(jié)果與仿真結(jié)果基本吻合。混合結(jié)構(gòu)型龍伯透鏡在達(dá)到電磁性能的同時(shí)在輕量化方面具有優(yōu)勢(shì)，其體積分?jǐn)?shù)相比 I-WP型減少 19.86%，相比 P 型減少3.81%，并且提高饋源增益約13 dBi，并且對(duì)饋源所發(fā)出的電磁波具有良好的匯聚效果。以上研究可為其他類型龍伯透鏡天線的輕量化設(shè)計(jì)提供理論與技術(shù)參考。

Abstract:

Aiming at the lightweight structure of Luneburg lens antenna, a mixed structure Luneburg lens design integrated with P-type and I-WP type porous structures is proposed. Firstly, by union Boolean operating of the level set function of P-type and I-WP type porous structures, the mixed structure model is established, and the local interpolation principle is used to ensure the continuity of gradient structure and eliminate the mutation caused by discontinuity. The equivalent permittivity of the basic porous structure is calculated based on the S-parameter inversion method, and the mapping law of the permittivity of the mixed structure with different volume fraction ratio is analyzed. Then the basic porous structure and mixed structure Luneburg lens are designed by discrete method, and three different Luneburg lens antennas are manufactured by 3D printing technology. The focal lengths of Luneburg lenses with different structures are simulated and tested in CST software and in the microwave dark room, and the standard gain horn is selected to feed the lenses. When the focal length is 10 mm, the gains of Luneburg lenses reach the maximum value, and the experimental results are basically consistent with the simulation results. The mixed structure type Luneburg lens has the advantage of light weight while achieving the electromagnetic performance, it reduces the volume fraction by 19.86% compared with the I-WP type and 3.81% compared with the P type, improves the gain of the feed source by about 13 dBi, and has a good convergence effect on the electromagnetic wave emitted by the feed source. The above research may provide theoretical and technical reference for the lightweight design of other types of Luneburg lens antennas.