本文選題：功率放大器　切入點：阻抗解空間　出處：《電子科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：為滿足未來無線通信系統(tǒng)對海量數(shù)據(jù)高速率傳輸?shù)囊?通信系統(tǒng)中的關(guān)鍵設(shè)備——功率放大器(功放),承載了越來越多的期待,包括高效率、寬頻帶、數(shù)字化等指標(biāo)要求。連續(xù)型功率放大器在效率提升、帶寬拓展、線性改善等方面具有巨大潛力,對其進行研究有利于高性能功放的設(shè)計。本文將以基本的連續(xù)型模型為開端,推導(dǎo)出具有更豐富解空間、更廣適用面的各類連續(xù)型模型。本文主要研究內(nèi)容及創(chuàng)新點總結(jié)如下:1、本文對各類傳統(tǒng)的連續(xù)型模型進行了歸納總結(jié),對其電壓、電流時域波形以及各自的阻抗解空間進行對比�；谧钚碌幕旌线B續(xù)型功放,本文提出了新型混合連續(xù)型模型,相比于前者,后者的電流電壓波形均被重新塑造,最佳設(shè)計阻抗的限制條件更為寬松,匹配網(wǎng)絡(luò)的設(shè)計難度得到進一步降低�；谶@一模型,本文詳細地介紹了使用低通濾波器原型設(shè)計匹配網(wǎng)絡(luò)的方法,包括阻抗的匹配、分離元件到微帶線的轉(zhuǎn)換等。最后,設(shè)計了一款工作頻帶為2.3-3.9 GHz的功率放大器,實測漏極效率為57%-79%,增益大于9.8 dB,與近期其他連續(xù)型模型相比具有可比性。2、本文結(jié)合連續(xù)逆F類、最平坦連續(xù)逆F類等逆模型,推導(dǎo)了最佳基波阻抗實部可發(fā)生變化的混合連續(xù)逆模型。相比于傳統(tǒng)逆模型,可變的基波阻抗實部能夠為寬帶匹配網(wǎng)絡(luò)設(shè)計提供一個寬松的設(shè)計環(huán)境,有利于寬帶高效率功放的設(shè)計。作者也分析了該功放模型輸出性能隨著設(shè)計空間(Design Space)拓展的變化情況,可以看出,在一定的拓展范圍內(nèi),該模型仍然能夠保持高效率狀態(tài)�；谶@一模型,作者采用階梯阻抗變換線結(jié)構(gòu)設(shè)計了一款工作在3.2-3.7 GHz的功放,單音信號測試時,其飽和漏極效率高于70%;使用5 MHz間隔的雙音信號測試時,在載波互調(diào)比滿足-30 dBc條件下,漏極效率大于40.3%。3、本文分析了連續(xù)類模型基于“波形工程”的高效率工作機制,對經(jīng)典連續(xù)B/J類模型進行了拓展,從時域上理論地推導(dǎo)出了具有任意次諧波成分的電壓波形。相比于連續(xù)B/J類模型中,最佳基波和諧波阻抗實部為單一阻抗的情況,所提出的模型中的基波和二次諧波阻抗的實部和虛部均能發(fā)生變化,并且能夠提供多個可供選擇的最佳解空間,能夠滿足設(shè)計者不同的場景需求。采用基于“封裝工程”的匹配網(wǎng)絡(luò)設(shè)計方法,作者計算出了最佳阻抗在封裝端面的空間位置,并設(shè)計了一款2.85-4.25 GHz頻段的功率放大器,飽和效率為58%-78%,漏極附加效率為54.5%-73%;在峰均比為8.6 dB的5 MHz WCDMA寬帶測試信號下,當(dāng)輸出功率滿足36 dBm時,相鄰頻道泄漏比為-31.5--38 dBc,平均漏極效率為38%-48%。4、本文分析了跨倍頻程連續(xù)型功放設(shè)計的難點,依據(jù)拓展連續(xù)B/J類模型,設(shè)計了一款0.7-3.6 GHz跨多倍頻程高效率功率放大器。在設(shè)計過程中,作者對最佳阻抗解空間的選擇進行了討論,并依據(jù)該最佳解空間進行后續(xù)功放設(shè)計;對諧波失配(包括二次諧波與三次諧波失配)對效率和匹配網(wǎng)絡(luò)設(shè)計帶來的影響進行了分析,給出了匹配網(wǎng)絡(luò)設(shè)計時需要注意的準(zhǔn)則,給出了二次諧波阻抗偏離最佳阻抗右側(cè)、三次諧波通過史密斯圓圖邊緣靠近開路點有利于效率提升的結(jié)論;最后結(jié)合晶體管的封裝網(wǎng)絡(luò)設(shè)計了緊湊型輸出匹配網(wǎng)絡(luò)。測試結(jié)果顯示,設(shè)計頻帶內(nèi),PAE大于47%,增益為9.6-12.6 dB,飽和輸出功率大于10 W。
[Abstract]:For the requirement of massive data high-speed transmission for future wireless communication systems, the key power amplifier device in a communication system (PA), carrying more and more expectations, including high efficiency, broadband, digital and other indicators. The continuous power amplifier efficiency, bandwidth expansion, has great potential to improve linearity etc. and to study its design for high performance amplifier. This will be the basic model of continuous start with more abundant solution space is derived, more widely applicable the various continuous model. The main research contents and innovation points are summarized as follows: 1, the continuous model of the traditional summary of the voltage, current waveform and the impedance of the solution space are compared. The latest mixed continuous power amplifier based on, this paper presents a new hybrid model of continuous phase. Compared to the former, the latter is current and voltage waveform re shaping, constraints in the optimal design of impedance is more relaxed, difficult to design the matching network has been further reduced. Based on this model, this paper introduces the method of using a low-pass filter prototype matching network design, including impedance matching, separating element Microstrip line the conversion. Finally, the design of power amplifier with a working frequency of 2.3-3.9 GHz, the measured drain efficiency is 57%-79%, the gain is greater than 9.8 dB, compared with other recent continuous model is comparable to that of.2, this paper combined with continuous inverse class F, the flat continuous inverse class F inverse model, hybrid derived the best fundamental impedance can change the continuous inverse model. Compared with the traditional inverse model, the fundamental impedance variable to provide a relaxed environment for the design of broadband matching network design, is conducive to broadband The design of high efficiency power amplifier. The author also analyzes the performance of output power amplifier model with the design space (Design Space) changes, development can be seen in the development of a certain range, the model is still able to maintain high efficiency. Based on this model, the author designed a work in the 3.2-3.7 GHz power amplifier using stepped impedance transform line structure, tone signal test, the saturation drain efficiency is higher than 70%; test the two tone signal using a 5 MHz interval, -30 dBc in the carrier to intermodulation ratio to meet the conditions, the drain efficiency is greater than 40.3%.3, this paper analyzes the model based on "continuous waveform project" efficient working mechanism of classical continuous B/J class model, from the time domain theory deduces the voltage waveform with arbitrary harmonic components. Compared to the continuous B/J model, the optimal harmonic impedance for single resistance Against the situation, the real and imaginary parts of the proposed model in the fundamental and two harmonic impedance can be changed, and can provide more options for the best solution space, can meet the different needs of the scene designers. Based on "packaging" matching network design method, the author calculates the best impedance in the space position package end face, and designed a GHz band power amplifier 2.85-4.25, saturation efficiency is 58%-78%, the drain added efficiency of 54.5%-73%; in the peak to average ratio of 5 MHz WCDMA broadband test signal of 8.6 dB, when the output power to meet the 36 dBm, adjacent channel leakage ratio for -31.5--38 dBc, the average drain efficiency of 38%-48%.4, this paper analyzes the difficulties of cross octave continuous power amplifier design, based on the expansion of continuous B/J model, designed a 0.7-3.6 GHz multi octave high efficiency power amplifier in the design. In the process, the author of the best impedance of the solution space are discussed, and on the basis of the optimal solution space for subsequent design of power amplifier; harmonic mismatch (including two harmonic and three harmonic mismatch) effect on the efficiency and bring the matching network design are analyzed, the need to pay attention to the matching network design is given by criterion, gives two harmonic impedance deviation from the optimum impedance right, three harmonics by Smith chart near the edge of the open circuit point is conducive to improve the efficiency of the conclusion; finally designed a compact output matching network with network encapsulation transistor. The testing results show that the design of band PAE is greater than 47%, a gain of 9.6-12.6 dB saturation the output power is greater than 10 W.

【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】：2017
【分類號】：TN722.75

【參考文獻】

相關(guān)會議論文 前1條

1 李路鵬;熊尚坤;王慶揚;;5G技術(shù)展望[A];2013全國無線及移動通信學(xué)術(shù)大會論文集（上）[C];2013年

相關(guān)碩士學(xué)位論文 前3條

1 陳金虎;寬帶高效率連續(xù)型功率放大器的研究[D];電子科技大學(xué);2015年

2 王振陽;新型寬帶高效率J類功率放大器的研究[D];中國科學(xué)技術(shù)大學(xué);2014年

3 董磊;諧波控制類高效率功率放大器研究[D];電子科技大學(xué);2012年

，

本文編號：1648570