K波段介质振荡器的设计与实现

发布时间：2018-02-01 03:25

本文关键词： 介质振荡器串联反馈型DRO 并联反馈型DRO 推-推型DRO 类推-推型DRO 功分器　出处：《南京理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：微波振荡器是微波射频系统中的重要部件,利用介质谐振器(DR)的介质振荡器(DRO)具有频率稳定度高、相位噪声低、体积小、成本低等优点。本文在推-推(Push-Push)型介质振荡器的研究基础上提出用基频反相输出二倍频同相输出双频功分器合成两路并联反馈型DRO输出信号,同样是用工作在基波频率的电路输出了二倍频信号,在保证信号质量的前提下大大降低了成本。电路中的振荡单元是并联反馈型DRO,这决定了该振荡器具有调试简单,输出功率高的特点。本文主要工作和成果如下：(1)分析研究了串联反馈型DRO、并联反馈型DRO和推-推型DRO的设计原理,并在ADS中对电路进行了谐波平衡仿真,仿真结果良好；(2)分析了推-推型DRO的二次谐波输出功率偏小的原因,提出了将双频复数阻抗匹配应用于介质振荡器以实现二次谐波输出功率增强的想法,最后在ADS中做了实验验证,结果显示二次谐波输出功率增强近7 dB；(3)提出了一种基频反相输出二倍频同相输出的对称输出结构的双频功分器。给出了功分器的设计公式和设计步骤,在ADS和HFSS中分别对其进行原理仿真和版图仿真,实测结果显示在基频处输出端口相位相差179.1°,在二倍频处输出端口相位相差1.75°。在推-推型DRO的基础上提出了类推-推型DRO,对类推-推型DRO进行了实物制作、调试和测试,该DRO输出K波段信号频率为19.50125 GHz,功率接近O dBm,相位噪声性能为-68.48 dBc@10kHz,-95.13 dBc@100kHz。
[Abstract]:Microwave oscillator is an important part in microwave radio frequency system. The dielectric oscillator with DRD) has high frequency stability, low phase noise and small volume. The advantages of low cost are as follows: Push-Push-Push-Push-Push-Push-Push-Push-push. Based on the research of the dielectric oscillator, two parallel feedback DRO output signals are synthesized by using the basic frequency inverse-phase output double frequency in-phase output dual-frequency power divider. The frequency doubling signal is also output by the circuit which works at the fundamental frequency, and the cost is greatly reduced on the premise of guaranteeing the signal quality. The oscillating unit in the circuit is a parallel feedback type DRO. This determines that the oscillator has the characteristics of simple debugging and high output power. The main work and results of this paper are as follows: 1) the series feedback DRO is analyzed and studied. The design principle of parallel feedback type DRO and push-push type DRO is presented. The harmonic balance simulation of the circuit in ADS is carried out, and the simulation results are good. Second harmonic output power of push-push DRO is analyzed, and the idea of applying dual frequency complex impedance matching to dielectric oscillator to enhance the output power of second harmonic is put forward. Finally, the experimental results in ADS show that the output power of the second harmonic is enhanced nearly 7 dB; In this paper, a symmetrical dual-frequency power divider with the symmetrical output structure of inverse-phase output is presented, and the design formula and design steps of the power divider are given. The principle simulation and layout simulation are carried out in ADS and HFSS respectively. The measured results show that the phase difference of output port at the fundamental frequency is 179.1 掳. The phase difference of output port is 1.75 掳at the second harmonic frequency. On the basis of the push-push DRO, the analogies-analogy drop is put forward, and the analog-to-analogy DRO is made, debugged and tested. The DRO output K-band signal frequency is 19.50125 GHz, the power is close to O-dBm, and the phase noise performance is -68.48 dBc@10kHz. -95.13 dBc@ 100kHz.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN752

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