【摘要】：連續(xù)型功率放大器是一種新型諧波控制型寬帶高效率功率放大器。本文主要圍繞寬帶高效率連續(xù)型功率放大器工作原理和設(shè)計(jì)方法展開研究。論文主要內(nèi)容和貢獻(xiàn)歸納如下:1.文章從時(shí)域和頻域總結(jié)歸納典型的高效率與寬帶功率放大器功放類型。基于Load-pull/Soure-pull設(shè)計(jì)了一款工作在3.0-3.8 GHz的寬帶高效率功率放大器,通過提高漏極電壓來提高功放增益和輸出功率。該寬帶高效率功放實(shí)現(xiàn)了在2.95-3.75 GHz頻段內(nèi)小信號(hào)增益15.7±0.7 dB,在3.0-3.7 GHz頻率范圍內(nèi),飽和輸出功率為45.32-46.33 dBm,漏極效率56.06%-64.56%。文章提出了一種基于峰值功放級(jí)聯(lián)的高增益寬帶高效率新型Doherty功放結(jié)構(gòu),并通過設(shè)計(jì)3.6-3.9 GHz的寬帶Doherty功放進(jìn)行仿真驗(yàn)證,實(shí)現(xiàn)了小信號(hào)增益13.9-14.9 dB,飽和輸出功率49.3-51.1 dBm,功率附加效率(Power-added Efficiency:PAE)為56%-62.6%,功率回退7-8 dB,PAE優(yōu)于50%的仿真結(jié)果。2.文章對(duì)連續(xù)B/J類,連續(xù)F類等連續(xù)型功率放大器進(jìn)行系統(tǒng)性的理論研究,并對(duì)連續(xù)型功率放大器進(jìn)行拓展,提出寬帶高效率混合連續(xù)型功放工作模式�；诨旌线B續(xù)型功率放大器的阻抗匹配空間進(jìn)行寬帶高效率功放設(shè)計(jì),其設(shè)計(jì)自由度更大,并通過設(shè)計(jì)一款相對(duì)帶寬為54.5%,工作頻段為1.6-2.8 GHz的寬帶高效率功放驗(yàn)證了其可行性和優(yōu)越性。該寬帶高效率混合連續(xù)型功率放大器仿真所得的基波阻抗在預(yù)測(cè)的阻抗范圍內(nèi)或者附近,并實(shí)現(xiàn)了目標(biāo)頻帶內(nèi)漏極效率67.5%-81.9%,輸出功率8.1-17.8 W實(shí)測(cè)結(jié)果。3.文章理論推導(dǎo)混合連續(xù)型功率放大器電流源平面阻抗到封裝平面的轉(zhuǎn)換,轉(zhuǎn)換后的封裝端面阻抗可直接用于輸出匹配網(wǎng)絡(luò)綜合。利用封裝端面的阻抗再結(jié)合Load-pull技術(shù)確定高效率高輸出功率的諧波阻抗區(qū)域,設(shè)計(jì)了一款工作在1.5-2.7 GHz的寬帶高效率混合連續(xù)型功率放大器,仿真所得到的基波阻抗很好的符合計(jì)算值,二次諧波在高效率高輸出功率阻抗區(qū)域內(nèi)并大部分靠近Smith圓圖邊緣,實(shí)測(cè)結(jié)果表明:在1.4-2.7 GHz頻率范圍內(nèi),飽和輸出功率10.7-16.6 W,漏極效率達(dá)到70.4%-78.3%。在峰均比為6 dB的寬帶5 MHz的WCDMA測(cè)試信號(hào)下,當(dāng)ACLR臨界低于-30 dBc時(shí),平均輸出功率35.2-38.1 d Bm,平均漏極效率42.2%-50.8%。
[Abstract]:Continuous power amplifier is a new type of harmonic control wideband high efficiency power amplifier. This paper focuses on the working principle and design method of broadband high efficiency continuous power amplifier. The main contents and contributions are summarized as follows: 1. This paper summarizes the typical types of high efficiency and wideband power amplifier in time domain and frequency domain. Based on Load-pull/Soure-pull, a wideband high efficiency power amplifier operating at 3.0-3.8 GHz is designed. The gain and output power of the amplifier can be improved by increasing the drain voltage. The wideband high efficiency amplifier achieves a small signal gain of 15.7 鹵0.7 dB, in the 2.95-3.75 GHz band and a saturation output power of 45.32-46.33 dBm, drain efficiency of 56.06-64.56. In this paper, a novel Doherty power amplifier structure based on peak power amplifier cascade is proposed, and the design of 3.6-3.9 GHz wideband Doherty power amplifier is verified by simulation. The simulation results show that the small signal gain 13.9-14.9 dB, saturation output power 49.3-51.1 dBm, power addition efficiency (Power-added Efficiency:PAE) is 56-62.6 and the power back 7-8 dB,PAE is better than 50%. 2. In this paper, the theory of continuous B / J type and continuous F type continuous power amplifier is studied systematically, and the continuous power amplifier is extended, and the broadband and high efficiency hybrid continuous power amplifier mode is proposed. The design of wideband and high efficiency power amplifier based on impedance matching space of hybrid continuous power amplifier has greater degree of freedom. The feasibility and superiority of a broadband high efficiency amplifier with relative bandwidth of 54.5 and working frequency of 1.6-2.8 GHz are verified. The fundamental impedance obtained by the simulation of the wideband high efficiency hybrid continuous power amplifier is within or near the predicted impedance range, and the drain efficiency in the target band is 67.5-81.9, and the measured output power is 8.1-17.8 W. This paper theoretically deduces the conversion of current source plane impedance to package plane of hybrid continuous power amplifier. The converted package end surface impedance can be directly used in output matching network synthesis. The harmonic impedance region of high efficiency and high output power is determined by using the impedance of encapsulated end face and Load-pull technology. A wideband and high efficiency hybrid continuous power amplifier working in 1.5-2.7 GHz is designed. The simulation results show that the fundamental impedance is in good agreement with the calculated value. The second harmonic is in the high efficiency and high output power impedance region and most of it is close to the edge of the Smith circle. The measured results show that the second harmonic is in the frequency range of 1.4-2.7 GHz. The saturation output power is 10.7-16.6 W, and the drain efficiency is 70.4- 78.3W. When the critical value of ACLR is lower than -30 dBc, the average output power is 35.2-38.1 d and the average drain efficiency of Bm, is 42.2-50.8.
【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

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