基于LTCC微型功分器和定向耦合器的设计与研究

发布时间：2018-04-16 18:37

  本文选题：功率分配器 + 小型化　； 参考：《南京理工大学》2016年硕士论文

【摘要】：功率分配器扮演着无可替代的角色,无论是相控阵雷达、电子探测、电子对抗等军用系统,还是移动通信、卫星通信、无线局域网、电视、遥控等民用系统,都会用到功率的合成和分配技术。Wilkinson功分器和定向耦合器作为功率分配器应用的两个分支已成为当下研究的热点。随着射频微波系统对微波元器件的小型化、高性能提出了更高的要求,对微型化高性能功率分配器的研究势在必行,本文围绕着如何使Wilkinson功分器和定向耦合器实现小型化、高性能做了如下的工作：(1)针对微带结构、同轴结构和波导结构等传统功分器尺寸过大的问题,利用了LTCC技术对内埋电感、内埋电容进行三维集成：针对隔离度不高、端口匹配不好等问题,采用了集总形式的Wilkinson功分器结构。结合ADS和HFSS联合仿真,对原理图中原件逐个拟合,设计出了一款通带在1.8-2.2GHz体积是3.2mm*1.6mm*0.9mm性能良好的功率分配器。(2)针对基于LTCC技术集总结构的WiIkinson功分器调试规律做了探究,分别对功分器中电感、接地电容、并联电容和层间距对功分器造成的影响进行了研究,通过对上述元件参数的扫描仿真,总结出元件对功分器性能影响的规律。并利用这些调试规律在原模型基础上设计出了通带在L波段和S波段两款性能良好的功分器。其体积都是3.2mm*1.6mm'0.9mm,L波段功分器通带在0.9-1.2GHz,S波段功分器的通带在2.8-3.1GHz。两款功分器的实物测试效果表明,插入损耗均小于1.5dB,隔离度均值优于20dB,在测试误差允许的范围内和仿真结果相吻合,达到了设计指标。(3)针对传统微带定向耦合器尺寸大、损耗高的问题,对双层带状线应用LTCC技术,引入蛇形走线方式进行高度集成；通过理论计算出带状线长度、宽度和间距,在此基础上分别对微带线长、宽、间距扫描优化,设计出了一款体积是4mm*7.48mm*2.2mm.插入损耗小于0.2dB、隔离度优于25dB工作在2.65-3.55GHz的小型化高性能定向耦合器。
[Abstract]:The power divider plays an irreplaceable role, whether it is military systems such as phased array radar, electronic detection, electronic countermeasures, or civilian systems such as mobile communications, satellite communications, wireless local area networks, television, remote control, etc.Wilkinson power divider and directional coupler are used as two branches of power divider application.With the miniaturization of microwave components in RF microwave system, higher requirements for high performance are put forward. It is imperative to study miniaturized high performance power dividers. This paper focuses on how to miniaturize Wilkinson power dividers and directional couplers.High-performance work is done as follows: (1) aiming at the problem of excessive size of traditional power dividers such as microstrip structure, coaxial structure and waveguide structure, the LTCC technology is used to integrate the embedded inductance and the buried capacitance: the isolation is not high.Due to poor port matching, the lumped Wilkinson power divider structure is adopted.Combined with the joint simulation of ADS and HFSS, the original parts in the schematic diagram are fitted one by one, and a power divider with good 3.2mm*1.6mm*0.9mm performance in 1.8-2.2GHz volume is designed.) the debugging rule of WiIkinson power divider based on LTCC technology lumped structure is explored.The effects of inductance, grounding capacitance, parallel capacitance and layer spacing on the power divider are studied, and the effects of the components on the performance of the splitter are summarized by scanning simulation of the parameters mentioned above.Two kinds of power dividers with good performance in L band and S band are designed on the basis of these debugging rules on the basis of the original model.Its volume is 3.2mm ~ 1.6mm ~ 0.9mm ~ (-1) mm ~ (-1) L band power divider pass band in 0.9-1.2GHz band S-band power divider's passband is 2.8-3.1GHz ~ (-1) GHz.The physical test results of the two power dividers show that the insertion loss is less than 1.5 dB, the average isolation is better than 20 dB, and the test error is in agreement with the simulation results, which reach the design target. (3) for the traditional microstrip directional coupler, the size of the coupler is large.For the problem of high loss, the LTCC technique is applied to the double-layer strip line, and the snake-like line mode is introduced for high integration, and the length, width and spacing of the strip line are calculated theoretically, and the scanning length, width and spacing of the microstrip line are optimized, respectively, on the basis of which the length, width and spacing of the microstrip line are optimized.A design is designed with a volume of 4 mm, 7.48 mm and 2.2 mm.The insertion loss is less than 0.2 dB, and the isolation is better than that of 25dB working in the 2.65-3.55GHz miniaturized high performance directional coupler.
【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】：TN626;TN622
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本文编号：1760118