【摘要】：隨著現(xiàn)代通信技術(shù)的迅猛發(fā)展，無線通信已經(jīng)成為帶動信息行業(yè)發(fā)展的重要力量。作為無線通信系統(tǒng)射頻前端的重要組成部分，微波濾波器對系統(tǒng)性能影響巨大。為了滿足不同通信模式和用戶對高速數(shù)據(jù)迫切需求，現(xiàn)代通信系統(tǒng)需要融合多頻段技術(shù)和寬帶技術(shù)的器件。因此，開展雙寬帶濾波技術(shù)研究，為無線通信中提供體積小，性能好的雙寬帶帶通濾波器具有重要的意義。論文主要研究了無線通信中的雙寬帶帶通濾波器，著重分析了雙寬帶濾波器的設(shè)計理論和構(gòu)造技術(shù)。本文的主要工作如下： 首先，基于枝節(jié)加載諧振器，提出了一種的混合槽線/微帶線的雙寬帶帶通濾波器。以一個多枝節(jié)加載的多模槽線諧振器為核心，加以微帶饋電，形成一個具有寬帶帶通特性的濾波器。進一步，在介質(zhì)基板上疊加一個枝節(jié)加載的雙模微帶諧振器，在通帶內(nèi)實現(xiàn)了兩個傳輸零點，把一個極寬通帶分成兩個寬通帶，從而實現(xiàn)了雙寬帶濾波器�；谶@種新型結(jié)構(gòu)，設(shè)計了一個相對帶寬分別為49.6%和65.6%的雙寬帶帶通濾波器。加工后仿真結(jié)果與測試結(jié)果吻合很好，，驗證了提出的結(jié)構(gòu)和設(shè)計理論。 其次，基于三角環(huán)形諧振器加載的槽線，提出了一種的混合槽線/微帶線的雙寬帶帶通濾波器。濾波器由一個雙枝節(jié)加載的多模槽線諧振器和一個三角環(huán)形雙模微帶諧振器構(gòu)成。加載在槽線諧振器上方的三角環(huán)形雙模微帶諧振器在在槽線的激勵下，簡并模式分離，在濾波器的通帶內(nèi)產(chǎn)生了兩個傳輸零點，把一個通帶分裂成兩個寬頻的通帶，實現(xiàn)了雙寬帶帶通濾波器。通過一個傳輸線模型對三角環(huán)形微帶諧振器加載的槽線進行分析，EM仿真結(jié)果和理論結(jié)果一致性很好�；谶@一結(jié)構(gòu)，為無線通信設(shè)計了一個相對帶寬分別為51.3%和48.7%的雙寬帶濾波器，理論結(jié)果和測試結(jié)果吻合很好。 最后，提出了一種基于橫向信號干擾理論的雙寬帶濾波器。結(jié)合橫向信號干擾理論的基本思路，利用兩條支路的信號干擾特性，實現(xiàn)了雙寬帶帶通特性的濾波器。用一個傳輸線模型對提出的濾波器結(jié)構(gòu)進行分析，濾波器零點和極點的位置可以由傳輸線的參數(shù)控制。利用這一結(jié)構(gòu)，實現(xiàn)了一種中心頻率在1.7/3.2GHz雙寬帶帶通濾波器，兩個通帶的相對帶寬分別為73%和35%。
[Abstract]:With the rapid development of modern communication technology, wireless communication has become an important force to drive the development of information industry. As an important part of RF front-end of wireless communication system, microwave filter has a great influence on system performance. In order to meet the urgent needs of different communication modes and users for high-speed data, modern communication systems need devices that combine multi-band technology and broadband technology. Therefore, it is of great significance to carry out the research of dual broadband filtering technology to provide small size and good performance dual broadband bandpass filter for wireless communication. In this paper, the dual broadband bandpass filter in wireless communication is studied, and the design theory and construction technology of the dual broadband filter are analyzed. The main work of this paper is as follows: firstly, a hybrid slot line / microstrip double broadband bandpass filter is proposed based on branch loaded resonator. Taking a multi-mode slot line resonator loaded by multiple branches as the core, a filter with broadband band-pass characteristics is formed by microstrip feed. Furthermore, a branch loaded dual-mode microstrip resonator is superimposed on the dielectric substrate, and two transmission zeros are realized in the passband, and a very wide passband is divided into two wide passbands, thus a double broadband filter is realized. Based on this new structure, a double broadband bandpass filter with relative bandwidth of 49.6% and 65.6% is designed. The simulation results after machining are in good agreement with the test results, and the proposed structure and design theory are verified. Secondly, based on the slot line loaded by triangular ring resonator, a dual broadband bandpass filter with hybrid slot line / microstrip line is proposed. The filter is composed of a multi-mode slot line resonator loaded with double branches and a triangular ring dual-mode microstrip resonator. The triangular ring dual mode microstrip resonator loaded above the slot line resonator is excited by the slot line and the degeneracy mode is separated. Two transmission zeros are generated in the pass band of the filter, and one passband is divided into two broadband passbands. The dual broadband bandpass filter is realized. The slot line loaded by triangular ring microstrip resonator is analyzed by a transmission line model. The EM simulation results are in good agreement with the theoretical results. Based on this structure, a dual broadband filter with relative bandwidth of 51.3% and 48.7% is designed for wireless communication, and the theoretical results are in good agreement with the test results. Finally, a double broadband filter based on transverse signal interference theory is proposed. Combined with the basic idea of transverse signal interference theory, the filter with double broadband band-pass characteristics is realized by using the signal interference characteristics of two branches. A transmission line model is used to analyze the proposed filter structure. The position of the zero and pole of the filter can be controlled by the parameters of the transmission line. Using this structure, a double broadband bandpass filter with central frequency in 1.7/3.2GHz is implemented. The relative bandwidth of the two passbands is 73% and 35%, respectively.
【學(xué)位授予單位】：華東交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN713.5

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相關(guān)博士學(xué)位論文 前1條

1 吳小虎;高性能多頻及寬帶濾波器的研究[D];華南理工大學(xué);2013年

本文編號：2491168