本文選題：太赫茲 + 平面天線��； 參考：《北京理工大學》2015年碩士論文

【摘要】：太赫茲成像技術在安檢、醫(yī)療等領域具有廣泛的應用前景，已成為當下的熱點研究領域。本文主要研究用于太赫茲成像系統收發(fā)前端的集成透鏡天線技術，即由片上天線和介質透鏡組成的探測單元，，充分利用了單片集成系統成本低、尺寸小、重量輕、適應性強等優(yōu)點。本文沿著單像素透鏡天線向多像素透鏡天線陣列擴展的研究思路，在多像素系統方面，擴展半球透鏡和復眼微透鏡是透鏡天線陣列的兩種主要探究方案。本文結合理論與電磁仿真對比了幾種工作于340GHz頻點的太赫茲片上天線，并選擇對數周期天線作為輻射單元。對擴展半球透鏡的原理進行了分析，給出了硅、石英和聚酯材料透鏡的設計規(guī)律，結合對數周期天線給出了單像素透鏡天線系統的仿真優(yōu)化結果，并完成方向圖測試，仿真和測試結果基本吻合�；跀U展半球透鏡和復眼微透鏡，仿真設計了2×2透鏡天線陣列，仿真結果顯示兩種系統波束分離特性和增益均良好。對于擴展半球透鏡天線陣列，在斯特列爾比不小于0.63以及現有加工條件下30mm直徑硅透鏡最大可容納2×2天線陣列、30mm直徑石英透鏡最大可容納4×4天線陣列。對于復眼微透鏡天線陣列，加工是主要難點，晶體材料加工難度大、成本高，而非晶體材料（聚酯類）可利用3D打印技術實現，因此對于復眼微透鏡方案利用非晶體材料是更合理的選擇。對比兩種方案，基于擴展半球透鏡的方案加工相對容易且陣單元方向性更好，而基于復眼微透鏡的方案加工相對困難但波束分離特性和可拓展性更具優(yōu)勢。
[Abstract]:Terahertz imaging technology has a wide application prospect in security, medical and other fields, and has become a hot research field. This paper mainly studies the integrated lens antenna technology used in the front end of THz imaging system, that is, the detection unit composed of on-chip antenna and dielectric lens, which makes full use of the monolithic integrated system with low cost, small size and light weight. Strong adaptability and other advantages. In this paper, the single pixel lens antenna is extended to the multi-pixel lens antenna array. In the multi-pixel system, the extended hemispherical lens and the compound eye microlens are the two main exploration schemes of the lens antenna array. Combined with theory and electromagnetic simulation, several terahertz antennas working at 340 GHz are compared in this paper, and logarithmic periodic antennas are chosen as radiation elements. The principle of extended hemispherical lens is analyzed, the design rules of silicon, quartz and polyester lens are given, the simulation optimization results of single pixel lens antenna system are given in combination with logarithmic periodic antenna, and the pattern test is completed. The simulation and test results are in good agreement with each other. Based on the extended hemispherical lens and the compound eye microlens, a 2 脳 2 lens antenna array is designed. The simulation results show that the beam separation characteristics and gain of the two systems are good. For the extended hemispherical lens array, the maximum capacity of the 30mm diameter silicon lens is 2 脳 2 antenna array, 30mm diameter quartz lens, 4 脳 4 antenna array under the Steller-ratio not less than 0.63 and the existing processing conditions. For the compound eye microlens antenna array, processing is the main difficulty, the processing of crystal material is difficult and the cost is high, while the non-crystalline material (polyester) can be realized by 3D printing technology. Therefore, it is more reasonable to use amorphous materials for compound eye microlens. Compared with the two schemes, the scheme based on extended hemispherical lens is relatively easy to process and the orientation of array elements is better, while the scheme based on compound eye microlens is relatively difficult to process, but the beam separation characteristics and expansibility are more advantageous.
【學位授予單位】：北京理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN821.5

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本文編號：2062261