【摘要】：作為開(kāi)關(guān)類功率放大器的一種,E類功率放大器效率高、電路結(jié)構(gòu)簡(jiǎn)單,具有廣闊的應(yīng)用前景。但E類功率放大器存在工作頻率受晶體管非線性輸出電容限制的問(wèn)題。因此,如何提升E類功率放大器的工作頻率上限一直是一個(gè)重要的研究課題。針對(duì)此問(wèn)題,本論文在對(duì)E類功放準(zhǔn)優(yōu)化設(shè)計(jì)研究的基礎(chǔ)上,重點(diǎn)研究了改變開(kāi)關(guān)電壓和電流占空比的準(zhǔn)優(yōu)化設(shè)計(jì)方法。通過(guò)這種方法,實(shí)現(xiàn)了E類功放工作頻率上限的提升和漏極開(kāi)關(guān)電壓的降低。其次,論文還對(duì)E類功放的諧波終端進(jìn)行了分析,設(shè)計(jì)出了一種新的具有諧波抑制作用的功放電路結(jié)構(gòu)。最后,在實(shí)現(xiàn)工作頻率提升的基礎(chǔ)上,論文對(duì)準(zhǔn)優(yōu)化E類功放的寬帶設(shè)計(jì)方法進(jìn)行了研究,完成了一款L波段的高效率寬帶準(zhǔn)優(yōu)化E類功放的設(shè)計(jì)與實(shí)現(xiàn)。論文具體工作內(nèi)容要點(diǎn)如下:1.對(duì)改變E類功放的開(kāi)關(guān)電壓和電流占空比的準(zhǔn)優(yōu)化設(shè)計(jì)方法進(jìn)行了研究,并分析了其對(duì)E類功放性能的影響。將該方法用于具體電路設(shè)計(jì),并通過(guò)仿真分析進(jìn)行了驗(yàn)證。2.對(duì)E類功放的諧波終端進(jìn)行分析,設(shè)計(jì)出了一種具有諧波抑制作用的功放電路結(jié)構(gòu)。在準(zhǔn)優(yōu)化設(shè)計(jì)基礎(chǔ)上,進(jìn)行了具體電路的設(shè)計(jì),并通過(guò)仿真分析,驗(yàn)證了該設(shè)計(jì)的有效性。應(yīng)用該設(shè)計(jì)方法,設(shè)計(jì)出了一款微帶結(jié)構(gòu)的準(zhǔn)優(yōu)化E類功放,并通過(guò)仿真分析,驗(yàn)證了設(shè)計(jì)方法的可行性。3.對(duì)準(zhǔn)優(yōu)化E類功放的寬帶設(shè)計(jì)方法進(jìn)行了研究,設(shè)計(jì)出了一款L波段高效率的寬帶準(zhǔn)優(yōu)化E類功放。在輸入和輸出網(wǎng)絡(luò)的設(shè)計(jì)中,利用阻抗優(yōu)化提取的方法,將寬帶匹配簡(jiǎn)化為基波匹配;采用微帶線微調(diào)和低通濾波的設(shè)計(jì)方法,簡(jiǎn)化了設(shè)計(jì),提升了效率。通過(guò)對(duì)該寬帶功放的仿真設(shè)計(jì)及實(shí)物測(cè)試,驗(yàn)證了前面的設(shè)計(jì)方法。具體為完成了一款工作頻率為900~1500MHz(相對(duì)帶寬為50%)、效率大于70%、增益平坦度小于?0.5dB、輸出功率大于40dBm的準(zhǔn)優(yōu)化E類功放的設(shè)計(jì)、制作和測(cè)試;完成了對(duì)測(cè)試數(shù)據(jù)的分析,提出了改進(jìn)設(shè)計(jì)的思路和辦法。本論文工作,對(duì)E類功放在微波頻段的設(shè)計(jì)有一定的工程參考價(jià)值。
[Abstract]:As a kind of switching power amplifier, class E power amplifier has high efficiency, simple circuit structure and wide application prospect. However, the class E power amplifier has the problem that the operating frequency is limited by the nonlinear output capacitance of the transistor. Therefore, how to raise the working frequency upper limit of class E power amplifier is always an important research topic. In order to solve this problem, on the basis of the research on the quasi-optimal design of class E power amplifier, this paper focuses on the quasi-optimization design method of changing the duty cycle of switching voltage and current. By this method, the upper limit of working frequency and the decrease of drain switching voltage of class E power amplifier are realized. Secondly, the harmonic terminal of class E amplifier is analyzed, and a new power amplifier circuit structure with harmonic suppression is designed. Finally, on the basis of improving the working frequency, the paper studies the broadband design method of optimizing class E power amplifier, and completes the design and implementation of a high efficient broadband quasi-optimized class E amplifier in L-band. The main points of the thesis are as follows: 1. The quasi-optimal design method for switching voltage and current duty cycle of class E amplifier is studied, and its influence on the performance of class E amplifier is analyzed. The method is applied to the circuit design and verified by simulation. 2. The harmonic terminal of class E power amplifier is analyzed, and a power amplifier circuit structure with harmonic suppression is designed. On the basis of quasi-optimal design, the design of concrete circuit is carried out, and the validity of the design is verified by simulation analysis. Using this design method, a quasi-optimized class E power amplifier with microstrip structure is designed, and the feasibility of the design method is verified by simulation analysis. The broadband design method of class E power amplifier is studied, and a class E power amplifier with high efficiency in L-band is designed. In the design of input and output networks, the wideband matching is simplified to fundamental wave matching by the method of impedance optimization extraction, and the design method of microstrip line fine-tuning and low-pass filtering is used to simplify the design and improve the efficiency. Through the simulation design and physical test of the broadband power amplifier, the design method is verified. The design, fabrication and test of a quasi-optimized class E power amplifier with working frequency of 900~1500MHz (relative bandwidth of 50%), efficiency greater than 70db, gain flatness less than? 0.5dB and output power greater than 40dBm are designed, fabricated and tested. The analysis of test data is completed, and the idea and method of improving design are put forward. The work of this paper has some engineering reference value for the design of class E power amplifier in microwave frequency band.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN722.75

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 趙廣林;;給功放機(jī)加裝散熱風(fēng)扇[J];家電檢修技術(shù);2001年07期

2 錢志遠(yuǎn);數(shù)字功放原理[J];電子世界;2002年01期

3 章長(zhǎng)彪,章武村;改進(jìn)同軸腔體通風(fēng)措施延長(zhǎng)功放管的使用壽命[J];西部廣播電視;2002年01期

4 賀繇;淺談D類功放[J];宜賓學(xué)院學(xué)報(bào);2002年03期

5 ;數(shù)字功放突破50W障礙[J];電子設(shè)計(jì)技術(shù);2004年05期

6 徐松森;;現(xiàn)代版威廉遜立體聲功放制作[J];實(shí)用影音技術(shù);2006年01期

7 朱著君;;八項(xiàng)注意 選出適合自己的好功放[J];當(dāng)代汽車;2008年06期

8 張?jiān)?;摩機(jī)受惠于聯(lián)想——介紹一款膽管功放改變功放管的嘗試[J];實(shí)用影音技術(shù);2009年03期

9 葉新海;;功放基礎(chǔ)知識(shí)問(wèn)與答[J];視聽(tīng)技術(shù);2009年Z1期

10 ;AV問(wèn)答[J];實(shí)用影音技術(shù);2010年05期

相關(guān)會(huì)議論文 前8條

1 倪琰;蔣偉;彭，

本文編號(hào)：2418617