Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/7501
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dc.contributor.advisor孟慶宗zh_TW
dc.contributor.advisorC.C. Mengen_US
dc.contributor.author彭安賢zh_TW
dc.contributor.authorPeng, AnSamen_US
dc.date2001zh_TW
dc.date.accessioned2014-06-06T06:40:08Z-
dc.date.available2014-06-06T06:40:08Z-
dc.identifier.urihttp://hdl.handle.net/11455/7501-
dc.description.abstract隨著無線通訊的蓬勃發展,對功率放大器的要求,除了輸出功率、高附加功率外,高線性度的要求也愈來愈重要。對功率放大器的效能而言,影響最大的莫過於功率元件本身。目前功率元件中又以PHEMT和HBT應用最廣。故本篇論文針對PHEMT和HBT二種重要的功率元件做功率上的量測。並對增益壓縮機制和不同負載阻抗作分析和了解。 本論文分為三個部份,第一部份主要為介紹功率量測的原理以及負載阻抗的一些基本觀念。第二部份則分析PHEMT的增益壓縮機制如膝部電壓、夾止電壓、崩潰電壓、最大汲極電流和其它特性。最後一部份則研究目前功率放大器最重要的功率元件HBT。HBT除了和PHEMT有不同的偏壓方式外更有著截然不同的增益壓縮機制如A類操作、膝部電壓、崩潰電壓、基極定電壓。 在本篇論文中對以上二種功率元件,我們都仔細分析了解其功率特性,並發展出一套獨特觀察增益壓縮機制的方式。並了解不同負載阻抗對其功率表現的影響。zh_TW
dc.description.abstractWith the rapid developments of wireless communication , Power Amplifiers (PA) not only require high output power, power-added efficiency, but also high linearity. For the performance of power amplifiers, the most important components are the power devices we used. The most widely used power devices are PHEMT and HBT now. Therefore this thesis focuses on the characteristics of PHEMT and HBT and performs several power measurements. In addition, we analyze the gain compression mechanism and different impedance load lines. This thesis is divided into three subjects. The first subject is the basic concepts of power measurement and load impedance. In the second subject we analyze the gain compression of PHEMT, such as knee voltage, pinch-off voltage, breakdown voltage, the maximum drain current and other characteristics. In the last subject we study the most important power device, HBT. HBT have very different bias operation and gain compression mechanism from PHEMT, such as Class-A operation, knee voltage, beakdown voltage, constant base voltage. In this thesis, we carefully analyze the power characteristics of these power devices in detailed and develop a new peculiar way to characterize the different gain compression mechanism. The influence of power in different load lines is also studied.en_US
dc.description.tableofcontents摘要(中文)………………………………………………………………….i 摘要(英文)………………………………………………………………....ii 誌謝………………………………………………………………………..iii 目錄………………………………………………………………………..vi 圖目錄…………………………………………………………………..…ix 表目錄…………………………………………………………………....xiii 第一章研究動機………………………………………………………….1 第二章基本理論………………………………………………………….4 2.1功率放大器的基本分析…………………………………….……..4 2.1.1 線性放大器………………………………………….….….4 2.1.2 A類放大器………………..……………………….……….4 2.1.3 增益壓縮機制………………….…….……………….……6 2.1.4 1dB增益壓縮點…………………………..……………..…7 2.1.5 諧波短路……………………………………………..…….8 2.2 功率放大器的非線性效應……………………………..…….….10 2.2.1 弱非線性失真…………………………………………….10 2.2.2 PHEMT方次律的非線性…………………………….….10 2.2.3 HBT指數律的非線性…………………………………….11 2.2.4弱非線性效應…………………………………………….12 2.3 負載拉移量測……………………………………………………13 2.3.1 Load-pull量測的基本概念……………………………….13 2.3.2 Load-pull量測系統……………………………….…..….14 2.3.3非最佳負載阻抗之操作………………………………….16 2.3.4負載阻抗調變………………………………………..…...18 2.3.5Load-pull軌跡圖…………………………………….……19 2.3.6負載阻抗與功率的關係………………………………....21 2.3.7負載阻抗有虛部的情形…………………………….……22 第三章PHEMT的增益壓縮機制……………………………….……...24 3.1 PHEMT元件特性…………………………………………….24 3.2 PHEMT不同的增益壓縮機制……………………………….27 3.3 PHEMT量測結果與分析…………………..…………….…..29 3.4 PHEMT短軸量測結果與分析…………………………….…41 第四章HBT的增益壓縮機制………………………………………......63 4.1 HBT元件結構與直流特性…….………………………………63 4.2 HBT的增益壓縮機制…………………………………….……65 4.3 HBT不同的增益壓縮機制………………………………….…73 4.4 HBT量測結果與分析……………………………………….…73 4.5 HBT短軸量測結果與分析………………………………..…..84 第五章結論………………………………………………………….…100 參考文獻………………………………………………………………...102zh_TW
dc.language.isoen_USzh_TW
dc.publisher電機工程學系zh_TW
dc.subjectLoad Pullen_US
dc.subject最佳負載阻抗zh_TW
dc.subjectGain Compressionen_US
dc.subject增益壓縮機制zh_TW
dc.subject功率量測zh_TW
dc.title異質接面雙載子與高電子遷移率電晶體功率元件之特性分析zh_TW
dc.titleThe Analysis of HBT and PHEMT Power Devicesen_US
dc.typeThesis and Dissertationzh_TW
item.languageiso639-1en_US-
item.openairetypeThesis and Dissertation-
item.cerifentitytypePublications-
item.grantfulltextnone-
item.fulltextno fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
Appears in Collections:電機工程學系所
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