可重構天線技術在無源測向.doc
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可重構天線技術在無源測向,摘要由于近年來局部戰(zhàn)爭的不斷爆發(fā)，電子對抗技術得到了很大的重視和發(fā)展。在電子對抗領域，對輻射源方位信息偵察得越精確，就越有助于對輻射源進行有效的戰(zhàn)場情報信息獲取、電子干擾以及精確打擊，為最終摧毀目標提供有力的保障。因此，輻射源的無源測向技術在電子對抗領域占有重要的地位。在無源測向中，由于目標的多樣性，其頻率也不盡相同，...
內(nèi)容介紹
此文檔由會員 違規(guī)屏蔽12 發(fā)布
摘要
由于近年來局部戰(zhàn)爭的不斷爆發(fā)，電子對抗技術得到了很大的重視和發(fā)展。在電子對抗領域，對輻射源方位信息偵察得越精確，就越有助于對輻射源進行有效的戰(zhàn)場情報信息獲取、電子干擾以及精確打擊，為最終摧毀目標提供有力的保障。因此，輻射源的無源測向技術在電子對抗領域占有重要的地位。在無源測向中，由于目標的多樣性，其頻率也不盡相同，現(xiàn)有的無源測向天線無法覆蓋足夠寬的頻帶。所以對無源測向天線的研究有著重要的意義。隨著天線技術的發(fā)展，可重構天線技術概念的提出為解決寬帶天線的設計提供了一個新的思路。本文就并行電磁計算問題、頻率可重構超寬帶天線和nABD無源測向方法進行了討論研究。
本文的主要研究工作歸納如下：
(1) 研究了電磁優(yōu)化的并行計算問題，并對整個并行計算架構進行了介紹。針對目前智能算法應用于電磁優(yōu)化問題時的計算復雜性和周期長等問題，以MATLAB并行計算工具箱為計算基礎，將HFSS電磁仿真軟件與PSO算法相結合，對微帶矩形貼片天線和PIFA天線進行優(yōu)化設計，仿真優(yōu)化表明該方法可行，能有效的縮短優(yōu)化周期，且在優(yōu)化過程中無需人為干涉，自動運行。
(2) 設計了頻率可重構超寬帶天線。以印刷橢圓單極子天線為原型，通過延長饋線來降低天線的工作頻率，成功的將頻率可重構天線應用到超寬帶天線的設計中。利用HFSS軟件對天線進行仿真優(yōu)化，仿真結果表明重構后的天線頻率覆蓋范圍為0.174~10.9GHz，帶寬比可達62:1，且在整個工作頻段上具有很好的全向性，設計的天線可以廣泛的應用于雷達測向等系統(tǒng)。
(3) 介紹了nABD測向算法，并提出改進方法。對nABD測向算法進行了簡要的介紹，通過對理想天線仿真測試，驗證了nABD測向算法的準確性，并對其局限性—測向角度范圍過分依賴天線方向圖的問題，討論了改進的nABD測向算法，擴大了其測向范圍。第三章中設計的頻率可重構天線應用到改進的nABD測向算法中進行仿真測試的結果表明，設計的天線在可測范圍內(nèi)具有較高的精度，誤差均小于 。
關鍵詞：并行計算；電磁優(yōu)化；頻率可重構超寬天線；無源測向；nABD
Abstract
The Electronic Countermeasure Technology has draw lots of attention and developed rapidly because of the outbreakof local war in recent years. In the field of Electronic Countermeasure Technology, getting more accurate information of the radiation sources’ direction can be more helpful to obtaining intelligence information, implementing electronic jamming and precision striking. Simultaneously, that may provide effective protection when destroying the target. So, the technology of passive direction finding for radiation resources plays an important role in the field of Electronic Countermeasure field. In the passive direction finding system, due to the diversity of the targets, their frequencies are not the same. And the existing passive direction finding antennas can not cover enough wide frequency bands. Therefore, it has very important significance to study the passive direction finding antennas. With the development of antenna technology, the concept of reconfigurable antenna is proposed, and it provides a new way to solve the problem of designing broadband antenna. In the article, the problem of parallel electromagnetic computing, the frequency reconfigurable ultra-wideband antenna and the method of passive direction finding were studied.
The major research works in the article can be summarized as the follows:
(1) Studied the electromagnetic optimization problem using parallel computing, and described the parallel computing architecture. Due to the computational complexity and long time’s cycle of using intelligent algorithm to optimize the electromagnetic problems, and based on the MATLAB parallel computing toolbox, the method of combining the HFSS electromagnetic simulation software and the PSO algorithm to optimize the electromagnetic problems was presented. Then the method was applied to the design of microstrip rectangular patch antenna and the optimization of PIFA antenna. The results of the simulation shows that the method is feasible and can effectively reduce the time of optimization. Meanwhile, the optimization can be done automatically without any human intervention.
(2) Designed a frequency ultra-wideband antenna. Based on the printed ellipse monopole antenna, by extending the feed line to reduce the operating frequency, a frequency ultra-wideband antenna was designed successfully using the reconfigurable antenna technology. The result of simulation by HFSS shows that the antenna covers a wideband from 0.174GHz to 10.9GHz, the bandwidth ratio up to 62:1, and has a good Omni-direction in the whole frequency band. The designed antenna can be widely used in radar and direction finding systems.
(3) Introduced the nABD direction finding method, and proposed an advanced method. A brief introduction of nABD direction finding method was given and ideal antennas were used to verify the method. Due to the limitation (measured angles ware over-reliance on the antenna pattern), an advanced method was proposed to expand the angle range. Then, the frequency reconfigurable antenna designed in chapter three was introduced into the advanced nABD method. From the results of simulation and analysis of errors, it can be conclude that the antenna can obtain high accurate angle, and the errors are less than .
Key words:..
由于近年來局部戰(zhàn)爭的不斷爆發(fā)，電子對抗技術得到了很大的重視和發(fā)展。在電子對抗領域，對輻射源方位信息偵察得越精確，就越有助于對輻射源進行有效的戰(zhàn)場情報信息獲取、電子干擾以及精確打擊，為最終摧毀目標提供有力的保障。因此，輻射源的無源測向技術在電子對抗領域占有重要的地位。在無源測向中，由于目標的多樣性，其頻率也不盡相同，現(xiàn)有的無源測向天線無法覆蓋足夠寬的頻帶。所以對無源測向天線的研究有著重要的意義。隨著天線技術的發(fā)展，可重構天線技術概念的提出為解決寬帶天線的設計提供了一個新的思路。本文就并行電磁計算問題、頻率可重構超寬帶天線和nABD無源測向方法進行了討論研究。
本文的主要研究工作歸納如下：
(1) 研究了電磁優(yōu)化的并行計算問題，并對整個并行計算架構進行了介紹。針對目前智能算法應用于電磁優(yōu)化問題時的計算復雜性和周期長等問題，以MATLAB并行計算工具箱為計算基礎，將HFSS電磁仿真軟件與PSO算法相結合，對微帶矩形貼片天線和PIFA天線進行優(yōu)化設計，仿真優(yōu)化表明該方法可行，能有效的縮短優(yōu)化周期，且在優(yōu)化過程中無需人為干涉，自動運行。
(2) 設計了頻率可重構超寬帶天線。以印刷橢圓單極子天線為原型，通過延長饋線來降低天線的工作頻率，成功的將頻率可重構天線應用到超寬帶天線的設計中。利用HFSS軟件對天線進行仿真優(yōu)化，仿真結果表明重構后的天線頻率覆蓋范圍為0.174~10.9GHz，帶寬比可達62:1，且在整個工作頻段上具有很好的全向性，設計的天線可以廣泛的應用于雷達測向等系統(tǒng)。
(3) 介紹了nABD測向算法，并提出改進方法。對nABD測向算法進行了簡要的介紹，通過對理想天線仿真測試，驗證了nABD測向算法的準確性，并對其局限性—測向角度范圍過分依賴天線方向圖的問題，討論了改進的nABD測向算法，擴大了其測向范圍。第三章中設計的頻率可重構天線應用到改進的nABD測向算法中進行仿真測試的結果表明，設計的天線在可測范圍內(nèi)具有較高的精度，誤差均小于 。
關鍵詞：并行計算；電磁優(yōu)化；頻率可重構超寬天線；無源測向；nABD
Abstract
The Electronic Countermeasure Technology has draw lots of attention and developed rapidly because of the outbreakof local war in recent years. In the field of Electronic Countermeasure Technology, getting more accurate information of the radiation sources’ direction can be more helpful to obtaining intelligence information, implementing electronic jamming and precision striking. Simultaneously, that may provide effective protection when destroying the target. So, the technology of passive direction finding for radiation resources plays an important role in the field of Electronic Countermeasure field. In the passive direction finding system, due to the diversity of the targets, their frequencies are not the same. And the existing passive direction finding antennas can not cover enough wide frequency bands. Therefore, it has very important significance to study the passive direction finding antennas. With the development of antenna technology, the concept of reconfigurable antenna is proposed, and it provides a new way to solve the problem of designing broadband antenna. In the article, the problem of parallel electromagnetic computing, the frequency reconfigurable ultra-wideband antenna and the method of passive direction finding were studied.
The major research works in the article can be summarized as the follows:
(1) Studied the electromagnetic optimization problem using parallel computing, and described the parallel computing architecture. Due to the computational complexity and long time’s cycle of using intelligent algorithm to optimize the electromagnetic problems, and based on the MATLAB parallel computing toolbox, the method of combining the HFSS electromagnetic simulation software and the PSO algorithm to optimize the electromagnetic problems was presented. Then the method was applied to the design of microstrip rectangular patch antenna and the optimization of PIFA antenna. The results of the simulation shows that the method is feasible and can effectively reduce the time of optimization. Meanwhile, the optimization can be done automatically without any human intervention.
(2) Designed a frequency ultra-wideband antenna. Based on the printed ellipse monopole antenna, by extending the feed line to reduce the operating frequency, a frequency ultra-wideband antenna was designed successfully using the reconfigurable antenna technology. The result of simulation by HFSS shows that the antenna covers a wideband from 0.174GHz to 10.9GHz, the bandwidth ratio up to 62:1, and has a good Omni-direction in the whole frequency band. The designed antenna can be widely used in radar and direction finding systems.
(3) Introduced the nABD direction finding method, and proposed an advanced method. A brief introduction of nABD direction finding method was given and ideal antennas were used to verify the method. Due to the limitation (measured angles ware over-reliance on the antenna pattern), an advanced method was proposed to expand the angle range. Then, the frequency reconfigurable antenna designed in chapter three was introduced into the advanced nABD method. From the results of simulation and analysis of errors, it can be conclude that the antenna can obtain high accurate angle, and the errors are less than .
Key words:..
