【摘要】：隨著現(xiàn)代無線通信技術的快速發(fā)展,頻率擁擠的問題日益突出,為了提高頻譜資源的利用率,擴頻、跳頻和動態(tài)頻率分配等技術得到廣泛的應用,可調濾波器作為實現(xiàn)這些技術的關鍵器件也得到越來越多的研究。小型化、高性能、調諧速度快、調諧范圍寬等成為可調濾波器設計的要求。 本文首先介紹了可調濾波器的研究意義和研究現(xiàn)狀；其次介紹了傳統(tǒng)濾波器的基本原理和綜合方法,為可調濾波器的設計奠定了理論基礎。最后利用可調濾波器的設計理論并結合可調濾波器的最新進展和應用需求,設計了兩種不同類型的可調濾波器：具有寬阻帶特性的小型化低通可調濾波器和絕對帶寬恒定的可調濾波器。 基于小型化、寬阻帶的設計目標,本文完成了微帶低通/低通可調濾波器兩種濾波器的設計。首先對階梯阻抗諧振器、三角形諧振器、蝶形諧振器的諧振特性進行理論分析,通過諧振器加載技術和慢波設計形式設計了一種結構緊湊并能抑制高次諧波的低通濾波器；其次基于低通可調濾波器的研究現(xiàn)狀,并結合對其的應用需求,利用類似的方法又設計了一種具有寬阻帶特性的小型化低通可調濾波器。 在絕對帶寬恒定的可調濾波器設計方面,我們首先對絕對帶寬恒定的可調濾波器的典型設計方法進行分析總結,并利用奇偶模分析法分析了E型多�？烧{諧振器的諧振特性。利用該E型多模可調諧振器設計了絕對帶寬恒定的小型化可調濾波器。其次為了解決此濾波器中的一些不足實現(xiàn)性能更好的可調濾波器,在此濾波器結構的基礎上作些改進從而實現(xiàn)了另一種類型的絕對帶寬不變的可調濾波器,并對該濾波器進行加工測試,驗證了設計方法的有效性。
[Abstract]:With the rapid development of modern wireless communication technology, the problem of frequency congestion has become increasingly prominent. In order to improve the utilization of spectrum resources, spread spectrum, frequency hopping and dynamic frequency allocation technology has been widely used. Tunable filter as the key device to realize these technologies has been studied more and more. Miniaturization, high performance, high tuning speed and wide tuning range are the requirements of tunable filter design. In this paper, the research significance and current situation of tunable filter are introduced firstly, and then the basic principle and synthesis method of traditional filter are introduced, which lays a theoretical foundation for the design of tunable filter. Finally, using the design theory of tunable filter, combined with the latest development and application requirements of tunable filter, Two different types of tunable filters are designed: miniaturized low-pass tunable filters with wide stopband characteristics and tunable filters with constant absolute bandwidth. Based on the design goal of miniaturization and wide stopband, two kinds of microstrip low pass / low pass tunable filters are designed in this paper. Firstly, the resonant characteristics of step impedance resonator, triangular resonator and butterfly resonator are theoretically analyzed. A compact low-pass filter is designed by using the resonator loading technique and slow wave design. Secondly, based on the research status of low pass tunable filter and its application requirements, a miniaturized low pass tunable filter with wide stopband characteristics is designed by using similar methods. In the design of tunable filters with constant absolute bandwidth, we first analyze and summarize the typical design methods of tunable filters with constant absolute bandwidth, and analyze the resonance characteristics of E type multi-mode tunable resonators by using the method of odd-even mode analysis. A miniaturized tunable filter with constant absolute bandwidth is designed by using the E type multimode tunable resonator. Secondly, in order to solve some shortcomings of this filter, the tunable filter with better performance is realized. Based on the structure of the filter, an improvement is made to realize another type of tunable filter with constant absolute bandwidth. The filter is processed and tested to verify the effectiveness of the design method.
【學位授予單位】：南京理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN713

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相關博士學位論文 前1條

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本文編號：2410772