本文選題：微波功率放大 + 阻抗匹配��； 參考：《西安工業(yè)大學(xué)》2015年碩士論文

【摘要】：微波頻段固態(tài)型功率放大模塊的廣泛應(yīng)用,不僅局限于以前的軍工裝備的應(yīng)用,現(xiàn)在普通的工業(yè)化裝備中也受到極大的關(guān)注。射頻功率放大器在無(wú)線傳輸系統(tǒng)中的重要性是顯而易見的,尤其是2013年我國(guó)工信部對(duì)三大運(yùn)營(yíng)商頒發(fā)了4G牌照,對(duì)高增益、大功率的微波固態(tài)功率放大器有著極大的需求。首先研究討論了微波頻段功放的設(shè)計(jì)理論,對(duì)功率放大管的穩(wěn)定性、阻抗匹配技術(shù)、功率合成與分配技術(shù)、功率放大模塊的結(jié)構(gòu)進(jìn)行了較深入的理論分析。通過(guò)射頻電路設(shè)計(jì)與仿真軟件對(duì)功率放大器進(jìn)行模塊電路仿真設(shè)計(jì),對(duì)選擇器件進(jìn)行穩(wěn)定性判定,判斷是否絕對(duì)穩(wěn)定,若不處于絕對(duì)穩(wěn)定則需要進(jìn)行相應(yīng)的穩(wěn)定性設(shè)計(jì),通過(guò)源牽引法和負(fù)載牽引法對(duì)器件的輸入、輸出阻抗匹配電路及其偏置電路進(jìn)行優(yōu)化設(shè)計(jì)。通過(guò)聯(lián)系理論知識(shí)和仿真軟件提出一種能夠?qū)崿F(xiàn)工程要求的功率放大模塊的方案,并進(jìn)行不斷的理論驗(yàn)證。最后運(yùn)用ADS軟件進(jìn)行整體聯(lián)合仿真優(yōu)化,使在理想狀態(tài)能夠滿足指標(biāo),然后繪制出微帶版圖,導(dǎo)入AutoCAD軟件中,經(jīng)過(guò)調(diào)整之后導(dǎo)入Altium Designer軟件制作印刷電路版圖。按著版圖進(jìn)行制版,對(duì)整個(gè)模塊進(jìn)行搭建,最后調(diào)試和測(cè)試,并對(duì)測(cè)試的結(jié)果進(jìn)行分析和總結(jié)。采用Hittite公司的芯片HMC487LP5和HMC7149,這兩顆能夠工作在本工程所需頻段,再結(jié)合威爾金森功率分配/合成器來(lái)設(shè)計(jì)功率放大模塊。工程要求工作頻段在9.3GHz～9.4GHz之間,輸入功率為15 dBm,輸出功率能達(dá)到30W及以上、功率增益為30dB、增益平坦度≤±1.5 dB,實(shí)現(xiàn)大功率、高增益的功率放大,最后對(duì)功放模塊可以改進(jìn)的部分進(jìn)行了探討,對(duì)研究工作做了總結(jié)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，

本文編號(hào)：1761567