負群時延微波電路的研究與設計
發(fā)布時間：2018-10-29 14:06
【摘要】：自二十世紀三十年代美國科學家H.N.yquistand S.Brand提出“群時延”這一概念后,各國科研人員對這一領域產(chǎn)生了濃厚的興趣,并開始深入的研究。特別是進入新世紀以后,隨著空間探測、衛(wèi)星導航、通信雷達、毫米波測量等相關理論的不斷完善和軟硬件水平的不斷提高,對通信系統(tǒng)的傳輸能力、信道傳輸特性的要求也越來越高,通過理論和實踐發(fā)現(xiàn),相位在信號傳輸過程中可以承載的信息量更大,穩(wěn)定性更高,而群時延正是用來表示相位線性度的重要參數(shù),因此有更多的研究人員開始對群時延展開研究。尤其是近些年來,負群時延電路因其特殊的性能和在前饋放大器、天線陣列等領域的廣泛應用,吸引了世界各國研究者的注意,成為又一個研究熱點。然而目前負群時延電路的研究成果主要集中在西方發(fā)達國家,特別是美國和日本,國內對于這一領域的研究還處在起步階段,據(jù)作者所知,目前國內還沒有專門的著作和文獻來論述負群時延電路的理論和設計,本文所設計的部分電路結構在國內尚屬于首次。本文針對目前國內教科書對于群時延概念解釋不夠透徹,結合國外負群時延相關理論,利用諧振電路特點,對負群時延的產(chǎn)生原理進行嚴謹?shù)臄?shù)學推導和物理層面的解釋。然后利用以上分析結果,結合現(xiàn)代通信系統(tǒng)的需要,設計了混合集成負群時延電路、分布式負群時延電路、對稱耦合線結構負群時延電路和多級不對稱耦合器負群時延電路共四種不同結構的電路結構,電路中心頻率均為2.2GHz。四種負群時延電路的最大負群時延值分別可以達到-5.8ns、-6.8ns、-9ns和-3.5ns,其最大負群時延帶寬分別可以達到92MHz、104MHz、120MHz和400MHz,并且工作頻段內信號損耗值較小。本文對以上每一種負群時延電路結構的工作原理進行了詳細的分析,利用Advanced Design System2009(ADS2009)進行版圖仿真,以驗證電路設計的合理性和正確性,并給出每一種電路結構的優(yōu)缺點及其改進方向。通過總結以上四大類型負群時延電路的特點,結合帶阻濾波器的特性,從濾波器的設計角度,又提出一種新的設計負群時延電路的思路,并利用這一思路,設計出一個中心頻率為2.2GHz的負群時延電路,其在中心頻率處的最大負群時延值可以達到-6.8ns,負群時延帶寬為120MHz,以上結果都已經(jīng)通過版圖仿真驗證其正確性,同時,在本文的最后對電路級數(shù)與負群時延電路性能之間的關系,做出定量分析,為以后的設計工作做好了鋪墊。
[Abstract]:Since the American scientist H.N.yquistand S.Brand put forward the concept of "group delay" in the 1930s, researchers from all over the world have taken a strong interest in this field and have begun to study it in depth. Especially after entering the new century, with the continuous improvement of related theories, such as space exploration, satellite navigation, communication radar, millimeter-wave measurement and so on, and the continuous improvement of the level of software and hardware, the transmission capability of the communication system has been improved. The requirement of channel transmission characteristic is higher and higher. Through theory and practice, it is found that the phase can carry more information and higher stability in the process of signal transmission, and group delay is an important parameter to express phase linearity. Therefore, more researchers began to study group delay. Especially in recent years, the negative group delay circuits have attracted the attention of researchers all over the world because of their special performance and wide applications in the fields of feedforward amplifiers and antenna arrays. However, the current research results of negative group delay circuits are mainly concentrated in the western developed countries, especially in the United States and Japan. The domestic research in this field is still in its infancy, so far as the author knows, At present, there are no special works and literatures to discuss the theory and design of the negative group delay circuit. The circuit structure designed in this paper is for the first time in China. Aiming at the lack of thorough explanation of the concept of group delay in domestic textbooks at present, combining with the relevant theories of negative group delay in foreign countries and utilizing the characteristics of resonant circuit, this paper makes a rigorous mathematical derivation and physical interpretation of the generation principle of negative group delay. Based on the above analysis results and the needs of modern communication system, a hybrid integrated negative group delay circuit and a distributed negative group delay circuit are designed. The negative group delay circuit with symmetric coupling line structure and the negative group delay circuit with multistage asymmetric coupler have four different structures. The central frequency of the circuit is 2.2 GHz. The maximum negative group delay values of the four kinds of negative group delay circuits can reach -5.8 ns-1 -6.8 ns-1 -9ns and -3.5 ns, respectively, and the maximum negative group delay bandwidth can reach 92 MHz 104MHz and 400MHz respectively. And the signal loss in the working frequency band is small. In this paper, the working principle of each negative group delay circuit structure is analyzed in detail, and the layout simulation by Advanced Design System2009 (ADS2009) is carried out to verify the rationality and correctness of the circuit design. The advantages and disadvantages of each circuit structure and its improvement direction are also given. By summing up the characteristics of the above four types of negative group delay circuits and combining the characteristics of the bandstop filters, a new way of designing negative group delay circuits is put forward from the point of view of the filter design. A negative group delay circuit with center frequency of 2.2GHz is designed. The maximum negative group delay at the center frequency can reach -6.8 ns and the negative group delay bandwidth is 120 MHz. The above results have been verified by layout simulation. At the end of this paper, the relationship between the circuit series and the performance of the negative group delay circuit is analyzed quantitatively, which lays the groundwork for the future design work.
【學位授予單位】：南京理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN015;TN713.5
本文編號：2297906
[Abstract]:Since the American scientist H.N.yquistand S.Brand put forward the concept of "group delay" in the 1930s, researchers from all over the world have taken a strong interest in this field and have begun to study it in depth. Especially after entering the new century, with the continuous improvement of related theories, such as space exploration, satellite navigation, communication radar, millimeter-wave measurement and so on, and the continuous improvement of the level of software and hardware, the transmission capability of the communication system has been improved. The requirement of channel transmission characteristic is higher and higher. Through theory and practice, it is found that the phase can carry more information and higher stability in the process of signal transmission, and group delay is an important parameter to express phase linearity. Therefore, more researchers began to study group delay. Especially in recent years, the negative group delay circuits have attracted the attention of researchers all over the world because of their special performance and wide applications in the fields of feedforward amplifiers and antenna arrays. However, the current research results of negative group delay circuits are mainly concentrated in the western developed countries, especially in the United States and Japan. The domestic research in this field is still in its infancy, so far as the author knows, At present, there are no special works and literatures to discuss the theory and design of the negative group delay circuit. The circuit structure designed in this paper is for the first time in China. Aiming at the lack of thorough explanation of the concept of group delay in domestic textbooks at present, combining with the relevant theories of negative group delay in foreign countries and utilizing the characteristics of resonant circuit, this paper makes a rigorous mathematical derivation and physical interpretation of the generation principle of negative group delay. Based on the above analysis results and the needs of modern communication system, a hybrid integrated negative group delay circuit and a distributed negative group delay circuit are designed. The negative group delay circuit with symmetric coupling line structure and the negative group delay circuit with multistage asymmetric coupler have four different structures. The central frequency of the circuit is 2.2 GHz. The maximum negative group delay values of the four kinds of negative group delay circuits can reach -5.8 ns-1 -6.8 ns-1 -9ns and -3.5 ns, respectively, and the maximum negative group delay bandwidth can reach 92 MHz 104MHz and 400MHz respectively. And the signal loss in the working frequency band is small. In this paper, the working principle of each negative group delay circuit structure is analyzed in detail, and the layout simulation by Advanced Design System2009 (ADS2009) is carried out to verify the rationality and correctness of the circuit design. The advantages and disadvantages of each circuit structure and its improvement direction are also given. By summing up the characteristics of the above four types of negative group delay circuits and combining the characteristics of the bandstop filters, a new way of designing negative group delay circuits is put forward from the point of view of the filter design. A negative group delay circuit with center frequency of 2.2GHz is designed. The maximum negative group delay at the center frequency can reach -6.8 ns and the negative group delay bandwidth is 120 MHz. The above results have been verified by layout simulation. At the end of this paper, the relationship between the circuit series and the performance of the negative group delay circuit is analyzed quantitatively, which lays the groundwork for the future design work.
【學位授予單位】：南京理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN015;TN713.5
【參考文獻】
相關期刊論文 前3條
1 羅碧先，羅健;外測轉發(fā)器＜ns級精度＞群時延參數(shù)的測試[J];導彈與航天運載技術;1995年02期
2 陳凡;時延均衡技術在無線電尋呼系統(tǒng)中的應用[J];電信技術;1997年01期
3 金順洪;無線尋呼系統(tǒng)的時延均衡[J];移動通信;1996年02期
，本文編號：2297906
本文鏈接：http://www.sikaile.net/kejilunwen/dianzigongchenglunwen/2297906.html
教材專著
