X波段高功率低插损及小型化波导移相器的研究

发布时间：2018-05-04 03:00

本文选题：高功率 + 低插损　；参考：《中国科学技术大学》2017年硕士论文

【摘要】：移相器是相控阵雷达、微波通信、高功率微波等系统不可或缺的器件,在应用中起到波束指向控制和波束成形作用。高功率微波、相控阵雷达等应用的发展,对移相器提出了更高要求,如高功率容量、低插损、小型化等。本文着重研究了X波段高功率低插损波导移相器和X波段低插损小型化波导移相器。首先,基于加载型移相器的基本原理,提出了高功率低插损PIN管波导移相结构。该移相结构包括:(1)在宽壁上有开槽的金属波导;(2)加载在该槽上的双支节导带;(3)两个跨接在双支节导带上的耐高功率PIN管(如碳化硅管);(4)相关的控制电路等。通过控制两个PIN管的偏置,改变其电容值,实现相位变化。结果表明,与同类的PIN管波导移相结构相比,其插入损耗低,回波损耗小,且峰值功率容量理论上在MW级别。其次,基于Y型结铁氧体环行器,采用大自旋波线宽铁氧体材料以及将直流磁偏置电路外置,设计了一种可耐高功率的低插损铁氧体环行器开关。再次,基于该铁氧体环行器开关,结合U型波导(或慢波波导)结构,提出并实现了一种新型的180°移相、高功率低插损的波导移相结构,并进行了加工和测试。低功率实测结果与仿真结果基本吻合。最后,基于上述两种移相结构,设计了四位高功率低插损波导移相器。相比于现有结果,该移相器功率容量较高,插入损耗更小。基于加载型移相器原理,利用在双脊波导上对称加载、非等距级联"L"型导带,实现了小型化、小角度移相的"L"型导带加载波导移相结构。同时,在双脊波导上加载环行导带结构,采用开关控制该导带结构的"开环"和"闭环"状态,进而实现小型化、大角度相移;将上述两种结构级联,设计了低插损小型化波导移相器,相移量范围为0°～180°。结果表明,与同类的波导移相器相比,其插入损耗较小,尺寸明显减小。
[Abstract]:Phase shifter is an indispensable device in phased array radar, microwave communication, high power microwave and other systems. It plays the role of beam-pointing control and beamforming in application. The development of high power microwave, phased array radar and other applications has put forward higher requirements for phase shifters, such as high power capacity, low insertion loss, miniaturization and so on. In this paper, X band high power low insertion loss waveguide phase shifter and X band low insertion loss miniaturized waveguide phase shifter are studied. Firstly, based on the principle of loading phase shifter, a phase shift structure of high power and low insertion loss PIN waveguide is proposed. The phase shifting structure includes: 1) slotted metal waveguide / 2) loaded on the slot) two control circuits related to the high power resistant PIN tube (e.g. silicon carbide tube / 4) connected to the double node guide band. By controlling the bias of two PIN transistors, the capacitance value is changed and the phase change is realized. The results show that the insertion loss and echo loss are lower and the peak power capacity is in the MW level theoretically compared with the similar PIN waveguide phase shifting structure. Secondly, based on Y type ferrite circulator, a high power low insertion loss ferrite circulator switch is designed by using large spin wave linewidth ferrite material and external DC magnetic bias circuit. Thirdly, based on the ferrite circulator switch and combined with the U-type waveguide (or slow wave waveguide) structure, a novel phase shift structure with 180 掳phase shift, high power and low insertion loss is presented and tested. The measured results of low power are in good agreement with the simulation results. Finally, a four-bit high power low-loss waveguide phase shifter is designed based on the above two phase-shifting structures. Compared with the existing results, the phase shifter has higher power capacity and less insertion loss. Based on the principle of loading phase shifter, the "L" type waveguide phase shifting structure with small angle and small angle is realized by using symmetrical loading and non-equidistant cascaded "L" type conduction band on double ridge waveguide. At the same time, the circular conduction band structure is loaded on the double ridge waveguide, and the open loop and closed loop states of the guide band structure are controlled by switch, which can realize miniaturization and large angle phase shift. A miniaturized waveguide phase shifter with low insertion loss is designed. The range of phase shifter is 0 掳~ 180 掳. The results show that the insertion loss and size of the waveguide phase shifter are smaller and smaller than those of the similar waveguide phase shifter.
【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】：2017
【分类号】：TN623

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