多功能功分器一体化研究
发布时间：2018-08-24 14:47
【摘要】：射频前端的小型化是无线通信技术发展的趋势之一,在传统的射频电路中,各种无源射频器件都是分别设计,然后以级联的形式连接在一起,这种设计方式不利于射频前端的小型化,因此,作为一种小型化和降低成本的有效方式,无源射频元件的一体化设计被越来越广泛的重视。功分器是射频前端馈电网络中的重要无源器件,本文针对多功能功分器的一体化设计开展研究,具有一定的理论意义和重要的应用价值。首先,本文从功分器的理论出发,结合混合模S参数的分析,提出了一种能够实现单端到差分转化的差分型功分器,实现了功率分配器与巴伦的一体化设计；其次,结合滤波器的设计理论,引入级联的阶梯耦合线结构,设计出具有滤波特性的功分器,实现了功分器和滤波器的一体化设计；最后,结合前两部分内容,将滤波功分器差分化,设计出具有滤波特性的差分功分器,进一步实现了功分器、滤波器以及巴伦三种元件的一体化设计。主要研究内容和创新如下：1、分析介绍了混合模式条件下的散射参量,得出了全差分端口和混合端口两种网络下,单端的传统网络S参量与混合模S参量之间的变换形式。2、以Wilkinson结构的功分器为基础,将混合模S参数分析方法和奇偶模分析方法相结合,通过采用枝节线加载阶梯阻抗线的结构来扩展带宽,设计和制作了一款工作于X波段(9-11GHz)的新型单端-差分功分器。测试的性能曲线与仿真的性能曲线基本吻合,在差模激励下,带内的插入损耗优于-4.6dB,输入端口处的回波损耗都在-15dB以下,输出端口处的回波损耗在-12dB以下,两个输出端之间的隔离性能都达到了-15dB以下,同时,还实现了良好的共模抑制。3、将等效电路方法和电磁仿真方法相结合,通过采用阶梯阻抗线和枝节线加载谐振器结构,设计和制作了一款工作于X波段(9.5-10.5GHz)的新型滤波型的功分器,其中,为了使电路紧凑、增加带内选择性、提高带外抑制能力,采用阶梯阻抗线为耦合线。测试的性能曲线和仿真的性能曲线基本一致,插入损耗优于-3.8dB,输入端口处回波损耗在-17dB以下,输出端口处回波损耗都处于-20dB以下,输出端处隔离度性能最大能够达到-16dB以下,实现了良好的滤波和功分特性。4、结合前两部分内容,将差分功分器的理论应用于滤波功分器中,设计和制作了一款X波段(9.5-10.5GHz)集功分器、滤波器和巴伦三种器件为一体的新型差分滤波功分器。为验证电路的性能,对电路进行了加工并测试,从测试结果中可以看出共模信号被抑制,差模激励下的输入端和输出端回波损耗均处在-13dB以下,带内的插入损耗优于-4dB,带内输出端的差模隔离性能在-20dB以下,与仿真曲线基本吻合。
[Abstract]:The miniaturization of RF front-end is one of the developing trends of wireless communication technology. In the traditional RF circuits, all kinds of passive RF devices are designed separately and connected together in cascaded form. This design method is not conducive to the miniaturization of RF front-end. Therefore, as an effective way of miniaturization and cost reduction, the integrated design of passive RF components has been paid more and more attention. Power divider is an important passive device in RF front-end feed network. In this paper, the integrated design of multi-function power divider is studied, which has certain theoretical significance and important application value. Firstly, based on the theory of power divider and the analysis of S parameter of mixed mode, a differential power divider is proposed, which can realize the conversion from single end to difference, and the integrated design of power divider and Barron is realized. Combined with the design theory of the filter, the cascade ladder coupling line structure is introduced to design the power divider with filtering characteristics, which realizes the integrated design of the power divider and the filter. Finally, combining the first two parts, the difference of the filter power divider is differentiated. A differential power divider with filter characteristics is designed, and the integrated design of power divider, filter and Barron is realized. The main research contents and innovations are as follows: 1. The scattering parameters under mixed mode are analyzed and introduced, and two kinds of networks, full differential port and mixed port, are obtained. On the basis of the power divider of Wilkinson structure, the transformation form between the traditional S parameter and the mixed mode S parameter of a single terminal network is combined with the parity mode analysis method and the mixed mode S parameter analysis method. A new single-terminal differential power divider working in X-band (9-11GHz) is designed and fabricated by using the structure of stepped impedance line loaded with branch line to expand the bandwidth. The measured performance curve is in good agreement with the simulated performance curve. Under differential mode excitation, the insertion loss in the band is better than -4.6 dB, the echo loss at the input port is below -15 dB, and the echo loss at the output port is below -12 dB. The isolation performance between the two output terminals is below -15dB. At the same time, a good common mode suppression of .3is realized. The equivalent circuit method is combined with the electromagnetic simulation method, and the resonator structure is loaded with step impedance line and branch line. A novel filter power divider working in X-band (9.5-10.5GHz) is designed and fabricated. In order to make the circuit compact, increase the in-band selectivity and improve the out-of-band suppression ability, the stepped impedance line is used as the coupling line. The measured performance curve is basically consistent with the simulated performance curve. The insertion loss is better than -3.8 dB, the echo loss at the input port is below -17dB, the echo loss at the output port is below -20dB, and the maximum isolation performance at the output terminal is below -16dB. A good filter and power divider is realized. Combined with the first two parts, the differential power divider is applied to the filter power divider, and an X-band (9.5-10.5GHz) power divider is designed and fabricated. A new type of differential filter splitter, which combines the filter and three kinds of Barron devices, is a new type of differential filter power divider. In order to verify the performance of the circuit, the circuit is machined and tested. It can be seen from the test results that the common mode signal is suppressed, and the echo loss of the input and output terminals under differential mode excitation is below -13dB. The in-band insertion loss is better than that of -4dB.The differential mode isolation performance of the in-band output is less than -20dB, which is in good agreement with the simulation curve.
【学位授予单位】：中国科学技术大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN626
本文编号：2201154
[Abstract]:The miniaturization of RF front-end is one of the developing trends of wireless communication technology. In the traditional RF circuits, all kinds of passive RF devices are designed separately and connected together in cascaded form. This design method is not conducive to the miniaturization of RF front-end. Therefore, as an effective way of miniaturization and cost reduction, the integrated design of passive RF components has been paid more and more attention. Power divider is an important passive device in RF front-end feed network. In this paper, the integrated design of multi-function power divider is studied, which has certain theoretical significance and important application value. Firstly, based on the theory of power divider and the analysis of S parameter of mixed mode, a differential power divider is proposed, which can realize the conversion from single end to difference, and the integrated design of power divider and Barron is realized. Combined with the design theory of the filter, the cascade ladder coupling line structure is introduced to design the power divider with filtering characteristics, which realizes the integrated design of the power divider and the filter. Finally, combining the first two parts, the difference of the filter power divider is differentiated. A differential power divider with filter characteristics is designed, and the integrated design of power divider, filter and Barron is realized. The main research contents and innovations are as follows: 1. The scattering parameters under mixed mode are analyzed and introduced, and two kinds of networks, full differential port and mixed port, are obtained. On the basis of the power divider of Wilkinson structure, the transformation form between the traditional S parameter and the mixed mode S parameter of a single terminal network is combined with the parity mode analysis method and the mixed mode S parameter analysis method. A new single-terminal differential power divider working in X-band (9-11GHz) is designed and fabricated by using the structure of stepped impedance line loaded with branch line to expand the bandwidth. The measured performance curve is in good agreement with the simulated performance curve. Under differential mode excitation, the insertion loss in the band is better than -4.6 dB, the echo loss at the input port is below -15 dB, and the echo loss at the output port is below -12 dB. The isolation performance between the two output terminals is below -15dB. At the same time, a good common mode suppression of .3is realized. The equivalent circuit method is combined with the electromagnetic simulation method, and the resonator structure is loaded with step impedance line and branch line. A novel filter power divider working in X-band (9.5-10.5GHz) is designed and fabricated. In order to make the circuit compact, increase the in-band selectivity and improve the out-of-band suppression ability, the stepped impedance line is used as the coupling line. The measured performance curve is basically consistent with the simulated performance curve. The insertion loss is better than -3.8 dB, the echo loss at the input port is below -17dB, the echo loss at the output port is below -20dB, and the maximum isolation performance at the output terminal is below -16dB. A good filter and power divider is realized. Combined with the first two parts, the differential power divider is applied to the filter power divider, and an X-band (9.5-10.5GHz) power divider is designed and fabricated. A new type of differential filter splitter, which combines the filter and three kinds of Barron devices, is a new type of differential filter power divider. In order to verify the performance of the circuit, the circuit is machined and tested. It can be seen from the test results that the common mode signal is suppressed, and the echo loss of the input and output terminals under differential mode excitation is below -13dB. The in-band insertion loss is better than that of -4dB.The differential mode isolation performance of the in-band output is less than -20dB, which is in good agreement with the simulation curve.
【学位授予单位】：中国科学技术大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN626
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