【摘要】：F類功率放大器在微波領(lǐng)域具有良好的應(yīng)用前景,受到業(yè)內(nèi)特別關(guān)注。F類功放在寬帶條件下要較好地抑制諧波和處理寄生參數(shù)是很困難的,因此討論高效率寬帶F類功放的文獻(xiàn)不多。本文針對這一難題,在研究器件非線性電容和實(shí)頻技術(shù)基礎(chǔ)上,對F類功放的高效率和頻帶拓寬問題展開了分析、仿真模擬研究,并完成了一款新型寬帶F類功放的設(shè)計(jì)與實(shí)現(xiàn)。論文在對F類功放效率特性的研究中,沒有采用F類功放的常規(guī)諧波控制網(wǎng)絡(luò),而是借鑒E類功放中非線性電容(即非線性CDS)能使高效率區(qū)域擴(kuò)大化的特性。重點(diǎn)研究F類功放中器件非線性CDS對漏極電壓、電流波形的作用,創(chuàng)建了器件非線性等效模型,而這個模型的諧波阻抗對頻率變化的敏感度很低。在設(shè)計(jì)放大器匹配網(wǎng)絡(luò)時,將諧波阻抗帶限制在高效率對應(yīng)的區(qū)域內(nèi),從而把F類功放匹配電路的設(shè)計(jì)從常規(guī)的、復(fù)雜的過程簡化為基波匹配問題。論文采用實(shí)頻技術(shù)來設(shè)計(jì)寬帶匹配網(wǎng)絡(luò),以拓展放大器帶寬特性。最后,為了實(shí)驗(yàn)驗(yàn)證上述研究結(jié)果,論文建模仿真、加工制作完成一款1.6-2.4GHz新型F類功率放大器。對該放大器的測試表明：整個1.6-2.4GHz頻帶內(nèi)(相對寬帶為40%)PAE均優(yōu)于63%。論文主要工作要點(diǎn)如下：1.在F類功放的分析與設(shè)計(jì)中,借鑒E類功放中非線性CDs在高效率區(qū)域內(nèi)能夠使諧波阻抗拓展的特性,用于控制F類功放中漏極電壓、電流波形,以達(dá)到提高效率目的；2.對實(shí)頻技術(shù)和達(dá)林頓綜合技術(shù)進(jìn)行研究；設(shè)計(jì)綜合出目標(biāo)匹配網(wǎng)絡(luò)的初始拓?fù)渚W(wǎng)絡(luò)和元件值;3.完整設(shè)計(jì)1.6-2.4GHz新型F類功率放大器,并進(jìn)行了相應(yīng)的制作和測試,實(shí)驗(yàn)驗(yàn)證了論文理論工作的可實(shí)現(xiàn)性。論文的相關(guān)工作,對微波功率放大器的設(shè)計(jì)、研究有一定的工程參考價值。
[Abstract]:Class F power amplifier has a good application prospect in microwave field, and it has attracted special attention in the industry. It is very difficult for F type power amplifier to suppress harmonics and deal with parasitic parameters well under the condition of wideband. Therefore, there are few literatures on high efficiency broadband F power amplifier. In this paper, based on the study of nonlinear capacitance and real frequency technology, the high efficiency and bandwidth widening of class F power amplifier are analyzed and simulated. The design and implementation of a new broadband F-type power amplifier is completed. In the study of the efficiency characteristics of class F amplifier, the conventional harmonic control network of class F amplifier is not used in this paper. Instead, the nonlinear capacitance (that is, nonlinear CDS) in class E amplifier can enlarge the high efficiency area. The effect of nonlinear CDS on drain voltage and current waveform in class F power amplifier is studied and a nonlinear equivalent model is established. The harmonic impedance of this model is very sensitive to frequency change. In the design of amplifier matching network, the harmonic impedance band is confined to the corresponding region of high efficiency, thus the design of F type power amplifier matching circuit is simplified from the conventional and complex process to the fundamental wave matching problem. In this paper, real-frequency technology is used to design broadband matching network to expand the bandwidth characteristics of amplifier. Finally, in order to verify the above research results, this paper models and simulates, and completes a new type F power amplifier of 1.6-2.4GHz. The test of the amplifier shows that the PAE in the whole 1.6-2.4GHz band (relative wideband is 40%) is better than 63. The main work of this paper is as follows: 1. In the analysis and design of class F amplifier, the nonlinear CDs in class E amplifier can expand the harmonic impedance in the high efficiency region, which can be used to control the drain voltage and current waveform in class F amplifier, so as to achieve the purpose of improving efficiency. 2. The real frequency technology and Darlington synthesis technology are studied, the initial topology network and component value of target matching network are designed and synthesized; 3. A new type F power amplifier of 1.6-2.4GHz is designed and tested. The experiment proves the realizability of the theoretical work in this paper. The related work of this paper has some engineering reference value for the design of microwave power amplifier.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN722.75
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本文編號：2403075