X波段固态功率放大模块的设计

发布时间：2018-04-17 02:06

  本文选题：微波功率放大 + 阻抗匹配　； 参考：《西安工业大学》2015年硕士论文

【摘要】：微波频段固态型功率放大模块的广泛应用,不仅局限于以前的军工装备的应用,现在普通的工业化装备中也受到极大的关注。射频功率放大器在无线传输系统中的重要性是显而易见的,尤其是2013年我国工信部对三大运营商颁发了4G牌照,对高增益、大功率的微波固态功率放大器有着极大的需求。首先研究讨论了微波频段功放的设计理论,对功率放大管的稳定性、阻抗匹配技术、功率合成与分配技术、功率放大模块的结构进行了较深入的理论分析。通过射频电路设计与仿真软件对功率放大器进行模块电路仿真设计,对选择器件进行稳定性判定,判断是否绝对稳定,若不处于绝对稳定则需要进行相应的稳定性设计,通过源牵引法和负载牵引法对器件的输入、输出阻抗匹配电路及其偏置电路进行优化设计。通过联系理论知识和仿真软件提出一种能够实现工程要求的功率放大模块的方案,并进行不断的理论验证。最后运用ADS软件进行整体联合仿真优化,使在理想状态能够满足指标,然后绘制出微带版图,导入AutoCAD软件中,经过调整之后导入Altium Designer软件制作印刷电路版图。按着版图进行制版,对整个模块进行搭建,最后调试和测试,并对测试的结果进行分析和总结。采用Hittite公司的芯片HMC487LP5和HMC7149,这两颗能够工作在本工程所需频段,再结合威尔金森功率分配/合成器来设计功率放大模块。工程要求工作频段在9.3GHz～9.4GHz之间,输入功率为15 dBm,输出功率能达到30W及以上、功率增益为30dB、增益平坦度≤±1.5 dB,实现大功率、高增益的功率放大,最后对功放模块可以改进的部分进行了探讨,对研究工作做了总结和展望。
[Abstract]:The wide application of microwave frequency solid-state power amplifier module is not only limited to the application of military equipment, but also received great attention in the common industrial equipment.The importance of RF power amplifier in wireless transmission system is obvious, especially in 2013, China Ministry of Industry and Information Technology issued 4G license to three major operators, which has great demand for high gain, high power microwave solid-state power amplifier.Firstly, the design theory of microwave power amplifier is discussed. The stability of power amplifier, impedance matching technology, power combination and distribution technology, and the structure of power amplifier module are analyzed theoretically.Through RF circuit design and simulation software, the module circuit simulation design of power amplifier is carried out, and the stability of the selected device is judged to judge whether it is absolutely stable or not, and if it is not in absolute stability, the corresponding stability design is needed.The input and output impedance matching circuit and its bias circuit are optimized by source traction and load traction.By combining theoretical knowledge with simulation software, a scheme of power amplifier module which can realize engineering requirements is proposed, and the theoretical verification is carried out continuously.Finally, the ADS software is used to optimize the whole system, so that the index can be satisfied in the ideal state, and then the microstrip layout is drawn and imported into the AutoCAD software, and then the Altium Designer software is imported into the Altium Designer software to make the layout of the printing circuit.According to layout, the whole module is built, finally debugged and tested, and the test results are analyzed and summarized.The Hittite chip HMC487LP5 and HMC7149 are adopted, which can work in the required frequency band of this project, and the power amplifier module is designed by combining Wilkinson power distribution / synthesizer.The engineering requires that the working frequency band be between 9.3GHz~9.4GHz, the input power is 15 dBm, the output power can reach 30 W and above, the power gain is 30 dB, the gain flatness is 鈮，

本文编号：1761567