基于微带—槽线过渡结构的无源超宽带器件设计
发布时间：2019-02-24 00:02
【摘要】：超宽带（Ultra Wideband，UWB）技术是一种利用纳秒至微秒级的窄脉冲传输数据的无载波通信技术。 随着无线通讯的迅猛发展，市场对结构紧凑的超宽带射频端的需求也在不断增加。如今，这些子系统通常工作在微波频段，包括滤波器和功分器。这就促使微波设计师们不断研究和发展超宽带设计技术。本文以微带-槽线耦合结构为基础，结合滤波器以及功分器的综合设计，并研究了与之相关的理论和技术，最终实现超宽带滤波器和宽带平衡功分器的设计。本文的主要研究内容如下： 首先，利用微带-槽线耦合结构，实现滤波器的超宽带特性。在此基础上，通过在微带线与槽线耦合处末端加上新型的环形负载提高了滤波器的选择性，通过输入输出端微带传输线的耦合，提高了通带与带外特性。 其次，在提出的超宽带滤波器的基础上，利用阶跃阻抗谐振器的谐振特性，通过耦合到超宽带滤波器，实现了具有5.8GHz陷波特性的超宽带带通滤波器。最终制作并测试了该具有陷波特性的超宽带滤波器，测试结果符合设计要求。 最后，为了适应差分电路的要求，本文基于微带-槽线耦合结构，设计出了具有共模信号抑制特性的宽带平衡功率分配器。通过三个隔离电阻提高了输出端口的隔离度，传输线折叠减小整个功分器的尺寸。对实物进行加工测试，，性能良好，验证了设计方法的正确性。
[Abstract]:Ultra-wideband (Ultra Wideband,UWB) technology is a carrier-free communication technology that transmits data using nanosecond to microsecond narrow pulses. With the rapid development of wireless communication, the demand for compact UWB RF terminals is increasing. Today, these subsystems usually work in microwave frequencies, including filters and power dividers. This prompted microwave designers to continue to research and develop UWB design technology. Based on the coupling structure of microstrip and slot line, combined with the integrated design of filter and power divider, the theory and technology related to it are studied in this paper. Finally, the design of UWB filter and wideband balance splitter is realized. The main contents of this paper are as follows: firstly, the ultra-wideband (UWB) characteristics of the filter are realized by using the microstrip-slot coupling structure. On this basis, the selectivity of the filter is improved by adding a new ring load at the end of the coupling between microstrip line and slot line, and by coupling the microstrip transmission line in the input and output terminal, the passband and out-of-band characteristics are improved. Secondly, based on the proposed UWB filter, the UWB bandpass filter with 5.8GHz notch characteristics is realized by coupling the resonant characteristics of the step impedance resonator to the UWB filter. Finally, the UWB filter with notch characteristics is fabricated and tested, and the test results meet the design requirements. Finally, in order to meet the requirements of differential circuits, a wideband balanced power divider with common mode signal suppression characteristics is designed based on the microstrip-slot coupling structure. The isolation of the output port is improved by three isolation resistors, and the transmission line folding reduces the size of the power divider. The processing test is carried out, the performance is good, and the correctness of the design method is verified.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN817;TN925
本文编号：2429361
[Abstract]:Ultra-wideband (Ultra Wideband,UWB) technology is a carrier-free communication technology that transmits data using nanosecond to microsecond narrow pulses. With the rapid development of wireless communication, the demand for compact UWB RF terminals is increasing. Today, these subsystems usually work in microwave frequencies, including filters and power dividers. This prompted microwave designers to continue to research and develop UWB design technology. Based on the coupling structure of microstrip and slot line, combined with the integrated design of filter and power divider, the theory and technology related to it are studied in this paper. Finally, the design of UWB filter and wideband balance splitter is realized. The main contents of this paper are as follows: firstly, the ultra-wideband (UWB) characteristics of the filter are realized by using the microstrip-slot coupling structure. On this basis, the selectivity of the filter is improved by adding a new ring load at the end of the coupling between microstrip line and slot line, and by coupling the microstrip transmission line in the input and output terminal, the passband and out-of-band characteristics are improved. Secondly, based on the proposed UWB filter, the UWB bandpass filter with 5.8GHz notch characteristics is realized by coupling the resonant characteristics of the step impedance resonator to the UWB filter. Finally, the UWB filter with notch characteristics is fabricated and tested, and the test results meet the design requirements. Finally, in order to meet the requirements of differential circuits, a wideband balanced power divider with common mode signal suppression characteristics is designed based on the microstrip-slot coupling structure. The isolation of the output port is improved by three isolation resistors, and the transmission line folding reduces the size of the power divider. The processing test is carried out, the performance is good, and the correctness of the design method is verified.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN817;TN925
本文编号：2429361
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