發(fā)布時間：2018-03-18 06:46

  本文選題：導(dǎo)航自適應(yīng)抗干擾陣列　切入點：導(dǎo)航天線　出處：《西安電子科技大學(xué)》2016年博士論文　論文類型：學(xué)位論文

【摘要】：衛(wèi)星導(dǎo)航系統(tǒng)具有大范圍、全天候、全天時高精度定位、測速和提供定時服務(wù)的能力,在國防和國民經(jīng)濟各個領(lǐng)域得到了廣泛應(yīng)用。然而由于衛(wèi)星導(dǎo)航信號到達地面信號極其微弱,又工作在復(fù)雜電磁環(huán)境下,很容易受到無意的或者人為的干擾。因此導(dǎo)航系統(tǒng)抗干擾技術(shù)已經(jīng)成為衛(wèi)星導(dǎo)航領(lǐng)域內(nèi)的研究熱點。導(dǎo)航抗干擾領(lǐng)域中,利用天線陣列設(shè)計的衛(wèi)星導(dǎo)航自適應(yīng)抗干擾陣列天線被大量學(xué)者研究。本文將以此為重點展開研究。人們將利用處于短波頻段的電磁波進行無線電通信的方式稱為短波通信,此種通信方式不論是在民用領(lǐng)域還是在軍事領(lǐng)域中都獲得了持久、廣泛的應(yīng)用。短波天線是短波通信系統(tǒng)的關(guān)鍵部件,為了追求更好的短波通信效果,大量研究人員對短波天線進行了持續(xù)、深入的研究,短波天線也是本文研究內(nèi)容之一。本文主要內(nèi)容概括如下：1.本文首先對目前使用的導(dǎo)航空域自適應(yīng)抗干擾技術(shù)進行了介紹,并對自適應(yīng)抗干擾算法進行了建模仿真,針對目前在自適應(yīng)抗干擾天線仿真方面存在的抗干擾性能無法驗證的問題,使用了ansys HFSS仿真軟件全波仿真和Matlab聯(lián)合仿真的方法,以優(yōu)化陣列抗低仰角來向干擾的性能為主要目標(biāo),對陣列天線進行了選型,總結(jié)出陣列選型工作方面的仿真方法和指導(dǎo)性結(jié)論。2.針對目前導(dǎo)航陣列中小型化天線單元存在的依賴高介電常數(shù)介質(zhì)板和帶寬不足的問題,本文利用微帶天線傳輸線模型理論,對微帶天線短路加載技術(shù)進行了研究,提出了一種新型短路加載結(jié)構(gòu),在實現(xiàn)天線小型化同時能獲得更寬的帶寬。并以此技術(shù)為基礎(chǔ)設(shè)計了不同饋電形式的圓極化導(dǎo)航微帶天線。仿真實測結(jié)果證明這種耦合短路結(jié)構(gòu)可以使得短路加載天線獲得更寬的帶寬。3.除了實現(xiàn)單頻短路加載微帶天線的寬帶化以外,本文繼續(xù)利用短路加載微帶天線傳輸線模型,提出了一種新型雙耦合短路加載結(jié)構(gòu),成功實現(xiàn)了短路加載微帶天線的雙頻化,并利用此結(jié)構(gòu)設(shè)計了兩款分別應(yīng)用于雙頻GPS和寬帶GNSS系統(tǒng)的雙點頻和雙寬帶微帶天線。相比于其他文獻發(fā)表的同類天線,本文提出的天線,在尺寸減小的同時,還具有較寬的帶寬并具有低成本、易加工、輻射效率高和低仰角性能好等優(yōu)點。4除此之外,針對天線尺寸對天線性能的限制問題,本文對導(dǎo)航可重構(gòu)天線進行了研究,利用LC短路加載的可調(diào)性,通過調(diào)整電感和電容這兩種方式,設(shè)計了兩款應(yīng)用于衛(wèi)星導(dǎo)航系統(tǒng)的短路加載可重構(gòu)天線。仿真實測結(jié)果證明可重構(gòu)方案可以使得導(dǎo)航天線在保持性能同時,尺寸進一步減小。5短波天線也是本文研究內(nèi)容的一部分,本文首先對短波電小天線的匹配技術(shù)進行了介紹。針對目前短波天線矢量天線調(diào)諧器體積過大的問題,對天線調(diào)諧器的調(diào)諧原理進行了修改,首先通過可變電感調(diào)諧實現(xiàn)輸入阻抗虛部為零,再通過簡單的匹配網(wǎng)絡(luò)對輸入阻抗實部進行匹配,虛部實部分開調(diào)諧使得匹配網(wǎng)絡(luò)尺寸大大減小,并以此為基礎(chǔ)設(shè)計了一款小型化、大功率的短波天線調(diào)諧器。
[Abstract]:The satellite navigation system has a wide range, all-weather, all day long time high precision positioning, velocity and timing ability provide services, has been widely used in national defense and national economy fields. However, due to the satellite navigation signal reaches the ground signal is extremely weak, and work in the complicated electromagnetic environment, easily by accident or man-made interference anti interference technology of navigation system. It has become a hot topic in the field of satellite navigation. Navigation interference in the field of research on Anti-jamming antenna array by a large number of studies using satellite navigation adaptive antenna array design. This paper will research on the focus. People will use electromagnetic wave in short wave band radio communication method call for HF communication, such communication either in the field or in the civilian military field have achieved a durable, widely used. Short wave antenna Is the key of the shortwave communication system, in order to pursue a better effect of shortwave communication, a large number of researchers are continuing to shortwave antenna, in-depth study of shortwave antenna is studied in this paper. The main contents of this paper are summarized as follows: 1. firstly, navigation spatial adaptive currently used anti-jamming technology are introduced, and the adaptive anti jamming algorithm of modeling and simulation, according to the anti-jamming performance of existing anti-jamming antenna simulation on adaptive problems could not be verified, using the method of CO simulation of ANSYS HFSS simulation software and Matlab full wave simulation, to optimize the array of low elevation to anti interference performance as the main target, the selection of antenna array, summed up the work of the selection of array simulation methods and conclusions for the current.2. navigation array miniaturization antenna unit in existence Lack of high-k dielectric plate and depends on the bandwidth problem, this paper using microstrip antenna transmission line model, the technology of short circuit loaded microstrip antenna is studied, put forward a new fault loading structure, in the realization of miniaturization of antenna and can get more bandwidth. And this technology is designed on the basis of different feeding form circularly polarized microstrip antenna. The navigation simulation experimental results prove that this coupling can make the short circuit short circuit structure loaded antenna gain a wider bandwidth than.3. broadband single frequency short circuit loaded microstrip antenna, the continued use of short-circuit loaded microstrip antenna transmission line model, put forward a new type of double coupling circuit loaded structure, the successful implementation of the dual frequency of short circuit loaded microstrip antenna, and the design of the double point two models were applied to dual frequency GPS and broadband GNSS system with wide frequency and dual micro by this structure. With similar antenna antenna. Compared to other published literature, the antenna is put forward in this paper, the reduced size at the same time, also has wide bandwidth and low cost, easy processing, high radiation efficiency and low elevation performance advantages of.4 in addition to the size of the antenna on the limitation of linear to this day. Navigation of reconfigurable antenna is studied, using LC short circuit loading is obtained, by adjusting the inductance and capacitance of the two methods, the short circuit load designed two applications to the satellite navigation system of reconfigurable antenna. The simulation test results show that the reconfigurable scheme can make the navigation antenna in maintaining performance at the same time, a further decrease the size of.5 shortwave antenna is studied in this paper and the content of the first matching technology of HF electrically small antenna are introduced. Aiming at the shortwave antenna vector antenna tuner for large volume of questions. The tuning principle of antenna tuner is modified, first by variable inductance tuning input imaginary impedance is zero, then the matching network is simple to input impedance matching, the real and the imaginary part separately tuned matching network size is greatly reduced, and on this basis to design a miniaturized shortwave antenna tuner high power.

【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2016
【分類號】：TN965.2

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