新型超宽带巴伦及其应用研究
发布时间：2018-11-04 15:42
【摘要】：近些年,随着无线通信系统的快速发展,超宽带、结构紧凑、低成本不断成为射频前端电路的设计重点。这就使得具有超宽带、易集成特性的新型微波无源器件如超宽带巴伦等正成为当前国内外的研究热点。本文提出了两种新型超宽带巴伦。其中微带线-槽线巴伦采用了两种不同形式的微带线到槽线的过渡实现了巴伦的功能,具有良好的幅度平衡特性和两个输出端口180度相位差。为了验证巴伦性能,本文将微带线-槽线巴伦集成到超宽带Vivaldi天线中,实现了天线和巴伦的一体化设计。其中微带线-共面波导巴伦中,采用了两种过渡结构(微带线-共面波导过渡结构和微带线-共面带状线过渡结构)实现平衡输出端口180度的相位差。进一步的,为了验证微带线-共面波导巴伦的特性,设计了一个三模差分贴片天线并实现其与巴伦的一体化设计。此外,本文提出了一种新型的兼具滤波性能和巴伦性能的多模巴伦带通滤波器(BPF)。该巴伦带通滤波器不仅采用了所设计的微带线-共面波导巴伦中的过渡结构实现巴伦特性,还引入了多模阶梯阻抗谐振器(SIR)和平行耦合结构实现三模带通滤波器特性。本文借助全波电磁仿真软件ANSOFT HFSS 13对所设计的两种新型超宽带巴伦及它们的应用进行了优化仿真,并对最后优化的结构进行了加工和测试。其中,微带线-槽线巴伦的仿真和测试结果十分吻合,结果表明该巴伦的带宽是从3.6 GHz到10.7GHz,通带内两个平衡端口的幅度差小于0.5 dB,相位差在180°±6°以内。而且,集成了巴伦的Vivaldi天线能够工作在3.6 GHz到11.2 GHz,在通带范围内具有良好的辐射性能。对于微带线-共面波导巴伦,仿真和测试的结果表明该巴伦能够工作在0.2 GHz到5.2 GHz(26：1)的超宽频带内,幅度不平衡性在0.4 dB以内,相位差优于180°±2°。集成了微带线-共面波导巴伦的三模差分贴片天线实现了45%的带宽,从而验证了该巴伦的工作性能。另外,对所设计的巴伦滤波器进行了测试,结果表明该超宽带巴伦滤波器不仅在1.86 GHz和3.7 GHz有两个传输零点实现了高选择性,而且具有良好的平衡性,通带内的幅度不平衡度优于0.5 dB,相位不平衡度在5度以内。这两种新型巴伦具有超宽带、低插损、结构紧凑和平衡特性良好的特点。因此,所提出的新型巴伦及它们的应用能够在射频通信系统中得到广泛使用。
[Abstract]:In recent years, with the rapid development of wireless communication systems, ultra-wideband (UWB), compact structure and low cost have become the focus of RF front-end circuit design. As a result, new microwave passive devices such as UWB Barron with ultra-wideband (UWB) and easy to integrate (UWB) characteristics are becoming the research focus at home and abroad. In this paper, two new types of UWB Barron are proposed. Two different forms of transition from microstrip line to slot line are used to realize the function of Barron, which has good amplitude balance and 180 degree phase difference between two output ports. In order to verify the performance of Barron, the microstrip line-slot Barron is integrated into the ultra-wideband Vivaldi antenna, and the integrated design of the antenna and Barron is realized. Two kinds of transition structures (microstrip line-coplanar waveguide transition structure and microstrip line-coplanar strip line transition structure) are used in the microstrip line-coplanar waveguide Balun to realize the phase difference of 180 degrees at the output port. Furthermore, in order to verify the characteristics of microstrip line-coplanar waveguide Barron, a three-mode differential patch antenna is designed and integrated with Barron. In addition, this paper proposes a new multimode Barron band-pass filter (BPF). With both filtering performance and Barron performance. The Barron band-pass filter not only uses the transition structure in the microstrip line-coplanar waveguide Barron to realize the Barren characteristic, but also introduces the multi-mode step impedance resonator (SIR) and the parallel coupling structure to realize the three-mode band-pass filter. In this paper, two new UWB Barron and their applications are optimized and simulated by the full wave electromagnetic simulation software ANSOFT HFSS 13, and the final optimized structure is processed and tested. The simulation and test results of microstrip line-slot line Barron are in good agreement. The results show that the bandwidth of the microstrip line is from 3.6 GHz to 10.7 GHz, and the amplitude difference between the two balanced ports in the passband is less than 0.5 dB, phase difference within 180 掳卤6 掳. Moreover, the Vivaldi antenna integrated with Barron can work in the range of 3. 6 GHz to 11. 2 GHz, with good radiation performance in the passband range. For microstrip line-coplanar waveguide Barron, the simulation and test results show that the Barron can work in the ultra-wide band of 0.2 GHz to 5.2 GHz (26:1), the amplitude unbalance is within 0.4 dB, and the phase difference is better than 180 掳卤2 掳. The three-mode differential patch antenna integrated with microstrip line-coplanar waveguide Balun achieves a bandwidth of 45%, which verifies its performance. In addition, the designed Barron filter is tested. The results show that the UWB Barren filter not only has two transmission zeros at 1.86 GHz and 3.7 GHz, but also has a good balance. The amplitude unbalance in the passband is better than that in the 0. 5 dB, phase unbalance within 5 degrees. These two new Barron have the characteristics of ultra-wideband, low insertion loss, compact structure and good balance characteristics. Therefore, the proposed new Barron and their applications can be widely used in RF communication systems.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN822.8
，
本文编号：2310302
[Abstract]:In recent years, with the rapid development of wireless communication systems, ultra-wideband (UWB), compact structure and low cost have become the focus of RF front-end circuit design. As a result, new microwave passive devices such as UWB Barron with ultra-wideband (UWB) and easy to integrate (UWB) characteristics are becoming the research focus at home and abroad. In this paper, two new types of UWB Barron are proposed. Two different forms of transition from microstrip line to slot line are used to realize the function of Barron, which has good amplitude balance and 180 degree phase difference between two output ports. In order to verify the performance of Barron, the microstrip line-slot Barron is integrated into the ultra-wideband Vivaldi antenna, and the integrated design of the antenna and Barron is realized. Two kinds of transition structures (microstrip line-coplanar waveguide transition structure and microstrip line-coplanar strip line transition structure) are used in the microstrip line-coplanar waveguide Balun to realize the phase difference of 180 degrees at the output port. Furthermore, in order to verify the characteristics of microstrip line-coplanar waveguide Barron, a three-mode differential patch antenna is designed and integrated with Barron. In addition, this paper proposes a new multimode Barron band-pass filter (BPF). With both filtering performance and Barron performance. The Barron band-pass filter not only uses the transition structure in the microstrip line-coplanar waveguide Barron to realize the Barren characteristic, but also introduces the multi-mode step impedance resonator (SIR) and the parallel coupling structure to realize the three-mode band-pass filter. In this paper, two new UWB Barron and their applications are optimized and simulated by the full wave electromagnetic simulation software ANSOFT HFSS 13, and the final optimized structure is processed and tested. The simulation and test results of microstrip line-slot line Barron are in good agreement. The results show that the bandwidth of the microstrip line is from 3.6 GHz to 10.7 GHz, and the amplitude difference between the two balanced ports in the passband is less than 0.5 dB, phase difference within 180 掳卤6 掳. Moreover, the Vivaldi antenna integrated with Barron can work in the range of 3. 6 GHz to 11. 2 GHz, with good radiation performance in the passband range. For microstrip line-coplanar waveguide Barron, the simulation and test results show that the Barron can work in the ultra-wide band of 0.2 GHz to 5.2 GHz (26:1), the amplitude unbalance is within 0.4 dB, and the phase difference is better than 180 掳卤2 掳. The three-mode differential patch antenna integrated with microstrip line-coplanar waveguide Balun achieves a bandwidth of 45%, which verifies its performance. In addition, the designed Barron filter is tested. The results show that the UWB Barren filter not only has two transmission zeros at 1.86 GHz and 3.7 GHz, but also has a good balance. The amplitude unbalance in the passband is better than that in the 0. 5 dB, phase unbalance within 5 degrees. These two new Barron have the characteristics of ultra-wideband, low insertion loss, compact structure and good balance characteristics. Therefore, the proposed new Barron and their applications can be widely used in RF communication systems.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN822.8
，
本文编号：2310302
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