【摘要】：利用亞波長等離子體增強(qiáng)小型化天線輻射效應(yīng)調(diào)控小型化天線的增益特性是一項(xiàng)尚處于起步階段的創(chuàng)新性技術(shù),對(duì)發(fā)展電子信息網(wǎng)絡(luò)平臺(tái)及微波通信、測控技術(shù),高超聲速飛行器通信、控制問題等國家重大戰(zhàn)略需求具有重要的科學(xué)意義和應(yīng)用價(jià)值。本論文利用亞波長等離子體結(jié)構(gòu)對(duì)電磁輻射的增強(qiáng)效應(yīng),通過實(shí)驗(yàn)研究與數(shù)值模擬相結(jié)合,研究、掌握亞波長等離子體薄層對(duì)微波信號(hào)增強(qiáng)效應(yīng)的關(guān)鍵技術(shù),為研發(fā)等離子體小型化天線原理樣機(jī)做技術(shù)準(zhǔn)備。主要研究內(nèi)容包括:亞波長等離子體增強(qiáng)小型化天線輻射仿真研究。為了設(shè)計(jì)實(shí)驗(yàn)工況,首先通過數(shù)值仿真方法研究電磁場空間分布特性,分析亞波長等離子體覆蓋天線的近場、遠(yuǎn)場及信道特性,明確亞波長等離子體結(jié)構(gòu)增強(qiáng)小型化天線的電磁波輻射特性及等離子體關(guān)鍵參數(shù)對(duì)微波信號(hào)增強(qiáng)效應(yīng)的影響和作用規(guī)律,指導(dǎo)等離子體及天線實(shí)驗(yàn)參數(shù)范圍設(shè)置,以獲得輻射信號(hào)的有效增強(qiáng);亞波長等離子體增強(qiáng)小型化天線輻射原理性實(shí)驗(yàn)研究。在亞波長等離子體覆蓋層參數(shù)選取的基本原則指導(dǎo)下,設(shè)計(jì)并搭建亞波長等離子體增強(qiáng)小型化天線輻射實(shí)驗(yàn)平臺(tái),通過改變等離子體源的工作參數(shù),考察不同頻率下的天線輻射增益、回波損耗、信道等基本傳輸特性,調(diào)制并優(yōu)化影響電磁波信號(hào)傳輸?shù)年P(guān)鍵等離子體參數(shù),進(jìn)而實(shí)現(xiàn)增強(qiáng)小型化天線輻射能力的有效改善;在此基礎(chǔ)上,通過測量天線輻射增強(qiáng)特性,結(jié)合等離子體診斷數(shù)據(jù)和數(shù)值仿真結(jié)果,進(jìn)一步建立天線輻射特性與等離子體參數(shù)之間對(duì)應(yīng)關(guān)系,掌握亞波長等離子體結(jié)構(gòu)調(diào)制增強(qiáng)小型化天線電磁輻射的工作特性,探究亞波長等離子體結(jié)構(gòu)對(duì)電磁波信號(hào)的增強(qiáng)機(jī)制;亞波長等離子體增強(qiáng)小型化天線輻射平臺(tái)自動(dòng)化研究。針對(duì)傳統(tǒng)的朗繆爾探針診斷系統(tǒng)在等離子體數(shù)據(jù)采集和數(shù)據(jù)分析處理過程中存在的問題,以及原理性實(shí)驗(yàn)平臺(tái)無法對(duì)等離子體密度形成自動(dòng)調(diào)控的不足,在原理性實(shí)驗(yàn)平臺(tái)基礎(chǔ)上進(jìn)行自動(dòng)化優(yōu)化,設(shè)計(jì)能夠自動(dòng)監(jiān)測等離子體溫度,且能在一定范圍內(nèi)根據(jù)增益需求自動(dòng)調(diào)控等離子體薄層內(nèi)電子數(shù)密度的實(shí)驗(yàn)平臺(tái),為下一階段研發(fā)具有一定自動(dòng)化能力的亞波長等離子體調(diào)制增強(qiáng)小型化天線輻射原理樣機(jī)做技術(shù)準(zhǔn)備。本文最終設(shè)計(jì)的實(shí)驗(yàn)裝置實(shí)現(xiàn)了利用亞波長等離子體對(duì)小型化天線電磁波輻射的增強(qiáng)作用,并能有效地提高實(shí)驗(yàn)效率,為開展亞波長等離子體增強(qiáng)小型化天線輻射原理樣機(jī)研發(fā)提供了理論及實(shí)驗(yàn)依據(jù)。
[Abstract]:Using subwavelength plasma to enhance the radiation effect of miniaturized antenna is an innovative technology which is still in the initial stage to control the gain characteristics of the miniaturized antenna. It is important for the development of electronic information network platform, microwave communication, measurement and control technology. Hypersonic vehicle communication, control and other important national strategic needs have important scientific significance and application value. In this paper, we use the structure of subwavelength plasma to enhance the electromagnetic radiation. Through the combination of experimental research and numerical simulation, we can master the key technology of the enhancement effect of subwavelength plasma thin layer on microwave signal. Technical preparation for the development of plasma miniaturized antenna prototype. The main research contents include: the emulation of radiation of miniature antenna enhanced by subwavelength plasma. In order to design experimental conditions, the spatial distribution of electromagnetic field is studied by numerical simulation, and the near-field, far-field and channel characteristics of subwavelength plasma-covered antenna are analyzed. The characteristics of electromagnetic wave radiation of miniaturized antenna enhanced by subwavelength plasma structure and the influence and law of the key parameters of plasma on the enhancement effect of microwave signal are clarified, and the range of experimental parameters of plasma and antenna is guided. In order to obtain the effective enhancement of the radiation signal, the radiation principle of the miniaturized antenna enhanced by subwavelength plasma is studied experimentally. Under the guidance of the basic principle of selecting the parameters of the subwavelength plasma coating, a subwavelength plasma enhanced miniaturized antenna radiation experimental platform is designed and built. By changing the working parameters of the plasma source, The basic transmission characteristics such as antenna radiation gain, echo loss and channel are investigated at different frequencies, and the key plasma parameters which affect the transmission of electromagnetic signal are modulated and optimized so as to improve the radiation capacity of the miniature antenna effectively. On this basis, by measuring the radiation enhancement characteristics of the antenna, combining the plasma diagnostic data and the numerical simulation results, the corresponding relationship between the antenna radiation characteristics and the plasma parameters is further established. The working characteristics of electromagnetic radiation enhancement of miniaturized antenna by subwavelength plasma structure modulation are grasped, and the enhancement mechanism of electromagnetic wave signal by subwavelength plasma structure is explored, and the automation of radiation platform of subwavelength plasma enhanced miniaturized antenna is studied. In view of the problems existing in the traditional Langmuir probe diagnosis system in the process of plasma data acquisition and data analysis and processing, and the deficiency that the principle experimental platform can not automatically control the plasma density. Based on the principle experimental platform, the experimental platform is designed, which can automatically monitor the plasma temperature and adjust the electron number density in the plasma thin layer according to the gain requirement in a certain range. Technical preparations are made for the next stage to develop a prototype of subwavelength plasma modulation to enhance the radiation principle of miniaturized antenna. The experimental device designed in this paper has realized the enhancement of electromagnetic wave radiation of the miniaturized antenna by using subwavelength plasma, and can effectively improve the experimental efficiency. It provides a theoretical and experimental basis for the research and development of a prototype of the radiation principle of a miniature antenna enhanced by subwavelength plasma.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN820

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