發(fā)布時間：2018-03-19 12:18

  本文選題：多模收發(fā)機　切入點：寬帶功率放大器　出處：《東南大學》2017年碩士論文　論文類型：學位論文

【摘要】：隨著現(xiàn)代社會通信技術(shù)的發(fā)展,不斷有新的通信標準被提出。一個優(yōu)秀的移動通信設(shè)備不僅要滿足新舊多種通信模式的要求,而且要具備強大的電池續(xù)航能力,尤其是便攜式通信設(shè)備,這就對發(fā)射機中的功率放大器提出了更高的要求。因此,研究能夠滿足多種通信模式的高效率功率放大器具有重要意義。本文的理論部分闡述了功率放大器設(shè)計難點與挑戰(zhàn),同時針對多模多標準的要求,介紹了寬帶功率放大器設(shè)計的常用技術(shù),在高效率的方案上,給出了開關(guān)功率放大器D類,E類和F類功率放大器基本結(jié)構(gòu)和工作原理,所設(shè)計的功率放大器的最終于采用E類結(jié)構(gòu),寬帶E類功率放大器的負載變換網(wǎng)絡(luò)設(shè)計直接影響到了功率放大器的性能,因此理論部分也重點分析了寬帶E類功率放大器的負載變換網(wǎng)絡(luò)。最終采用了差分有限電感負載網(wǎng)絡(luò)設(shè)計了寬帶E類功率放大器。該功率放大器采用0.13μmSiGeBiCMOS工藝,覆蓋了 1.7GHz-2.7GHz的主流通信標準,滿足了通信設(shè)備對多種通信模式的兼容能力。另一方面,設(shè)計的功率放大器工作在E類開關(guān)狀態(tài),同傳統(tǒng)線性功率放大器相比效率得到明顯提升,實現(xiàn)了設(shè)備的低功耗要求。功率放大器主體采用了兩級差分結(jié)構(gòu),差分結(jié)構(gòu)在減小寄生參數(shù)影響的同時也能夠抑制輸出的偶次諧波,提高功率放大器帶寬性能�？紤]到擊穿電壓影響,功率放大器的驅(qū)動級采用共源共柵結(jié)構(gòu)。功率放大器的負載變換網(wǎng)絡(luò)采用新穎的差分有限電感結(jié)構(gòu),不僅簡化了電路而且提升功率放大器帶寬和效率。設(shè)計中也采用了有耗匹配,匹配補償?shù)燃夹g(shù)提升功率放大器整體性能。后仿真結(jié)果表明,在1.7G-2.7G的工作頻帶內(nèi),功率放大器無條件穩(wěn)定,輸入反射系數(shù)S11小于-11.OdB,匹配良好。輸出功率大于27.6dBm,功率附加效率大于51.7%,功率增益大于22.6dB,滿足多種應用的需求。本課題設(shè)計的功率放大器主要考慮多模多標準和高效率,應用的核心領(lǐng)域是低功耗便攜通信設(shè)備。當然,在高線性度的應用場景中,可以采用包絡(luò)消除與恢復等結(jié)構(gòu)提升功率放大器整體的線性度來滿足設(shè)備的要求。
[Abstract]:With the development of communication technology in modern society, new communication standards have been put forward. An excellent mobile communication equipment should not only meet the requirements of new and old communication modes, but also have strong battery life ability. Especially the portable communication equipment, which puts forward higher requirements for the power amplifier in the transmitter. It is of great significance to study the high efficiency power amplifier which can satisfy various communication modes. In the theoretical part of this paper, the design difficulties and challenges of power amplifier are expounded, and the requirements of multi-mode and multi-standard are also discussed. This paper introduces the common techniques in the design of wideband power amplifiers. On the basis of the high efficiency scheme, the basic structure and working principle of the switching power amplifiers D class E and F type power amplifiers are given. The class E structure of the power amplifier is adopted, and the load conversion network design of the wideband class E power amplifier has a direct impact on the performance of the power amplifier. Therefore, in the theoretical part, the load conversion network of the wideband class E power amplifier is also analyzed. Finally, the class E power amplifier is designed by using the differential finite inductance load network. The power amplifier adopts a 0.13 渭 mSiGeBiCMOS process. The main communication standard covering 1.7GHz to 2.7GHz satisfies the compatible capability of communication equipment for various communication modes. On the other hand, the designed power amplifier works in the switching state of Class E. the efficiency of the designed amplifier is significantly improved compared with the traditional linear power amplifier. The low power requirement of the equipment is realized. The main body of the power amplifier adopts two-stage differential substructure. The differential structure not only reduces the influence of parasitic parameters, but also inhibits the output even harmonics. Considering the influence of breakdown voltage, the drive stage of the power amplifier adopts a common source common-grid structure, and the load conversion network of the power amplifier adopts a novel differential finite inductance structure. It not only simplifies the circuit but also improves the bandwidth and efficiency of the power amplifier. The lossy matching and matching compensation techniques are also used to improve the overall performance of the power amplifier. The simulation results show that, in the working band of 1.7G-2.7G, The power amplifier is unconditionally stable, The input reflection coefficient S11 is less than -11.OdB, which matches well. The output power is more than 27.6dBm, the power additional efficiency is greater than 51.7dBand the power gain is more than 22.6dB. the power amplifier designed in this paper mainly considers multi-mode multi-standard and high efficiency. The core area of application is low power portable communication equipment. Of course, in high linearity application scenarios, envelope cancellation and recovery can be used to enhance the overall linearity of power amplifier to meet the requirements of the equipment.
【學位授予單位】：東南大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN722.75

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本文編號：1634237