Ku波段六位数控移相器设计

发布时间：2018-03-11 19:42

本文选题：Ku波段　切入点：数控移相器　出处：《东南大学》2017年硕士论文　论文类型：学位论文

【摘要】：移相器在汽车GPS导航和卫星系统中有着广泛的应用,尤其在相控阵雷达和多波束天线里有不可或缺的作用。移相器通过改变信号相位来控制改变波速方向,是相控阵雷达中收发组件的关键部件。每个相控阵雷达中有着成千上万个收发组件,每个收发组件都需要一个相应的数控移相器。如何降低移相器的成本和体积而不影响相控阵雷达的性能,使得本课题的研究很有意义。本文首先介绍了常见的基于SiGe半导体工艺开关电路,然后对单刀双掷开关进行了详细的介绍。之后,综述了各种数控移相器的工作原理。在深入分析各类数控移相器的特点后,本文对Ku波段集总元件型移相器进行了研究。高位180°和90°移相单元电路采用高/低通滤波拓扑结构,低位45°、22.5°、11.25°、5.625°采用了带通/低通滤波拓扑结构。另外,为了提高移相幅度波动指标,还设计了一种新颖的带通/低通滤波移相单元。由于工艺限制,工艺库不能提供感值过小的电感,故在ADS中设计小感值的平面螺旋电感并进行了电磁仿真。本文设计的电路工作在Ku波段,为使电路仿真更具准确性,采用了电磁场仿真和原理图联合仿真的优化仿真方法。本文最终完成了 Ku波段六位数控移相器的设计,芯片整体尺寸为1.57mm× 1.3mm,在16GHz工作频率下联合仿真结果为:移相精度小于3°,插入损耗小于13dB,移相幅度波动小于±1dB。从仿真结果来看,该移相器在工作频率下具有高移相精度,低插入损耗等性能。
[Abstract]:Phase shifters are widely used in automotive GPS navigation and satellite systems, especially in phased array radar and multi-beam antennas. Is a key component of a phased array radar. There are thousands of transceiver components in each phased array radar. Each transceiver requires a corresponding numerical controlled phase shifter. How to reduce the cost and volume of phase shifter without affecting the performance of phased array radar, This paper first introduces the common semiconductor process switch circuit based on SiGe, then introduces the single pole double throw switch in detail. The working principle of various numerical controlled phase shifters is summarized. After deeply analyzing the characteristics of various kinds of numerical control phase shifters, the Ku-band lumped element phase shifters are studied in this paper. The high position 180 掳and 90 掳phase shifters adopt high / low pass filter topologies. In addition, a novel band-pass / low-pass filter phase shifting unit is designed in order to improve the fluctuation index of phase shift amplitude. Due to the process limitation, the process library can not provide inductors with too small sensible value. Therefore, the planar spiral inductor with small inductance is designed in ADS and electromagnetic simulation is carried out. The circuit designed in this paper works in Ku-band, in order to make the circuit simulation more accurate. The optimization simulation method of electromagnetic field simulation and schematic simulation is adopted. Finally, the design of Ku band six-bit numerical control phase shifter is finished. The overall size of the chip is 1.57mm 脳 1.3mm. The combined simulation results at 16GHz operating frequency are as follows: the phase shift precision is less than 3 掳, the insertion loss is less than 13dB, and the fluctuation of phase shift amplitude is less than 卤1dB. the simulation results show that the phase shifter has high phase shifting accuracy at the operating frequency. Low insertion loss and other properties.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN623

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