高頻功率放大器的設(shè)計(jì)-文庫(kù)吧
2025-06-15 10:59 本頁(yè)面
【正文】 .......................................................................................................................................13 第一放大級(jí)并測(cè)量所需參數(shù)和輸出波形 ............................................................................13 第二放大級(jí)并測(cè)量所需參數(shù)和輸出波形 ............................................................................14 第三放大級(jí)并測(cè)量所需參數(shù)和輸出波形 ............................................................................14 仿真結(jié)果分析 ...............................................................................................................................15總結(jié) .........................................................................................................................................................16參考文獻(xiàn) .................................................................................................................................................17附錄 .........................................................................................................................................................18《通信電子線路》課程設(shè)計(jì)摘要通信電路中，為了彌補(bǔ)信號(hào)在無(wú)線傳輸過程中的衰耗要求發(fā)射機(jī)具有較大的功率輸出，通信距離越遠(yuǎn)，要求輸出功率越大。為獲得足夠大的高頻輸出功率，必須采用高頻功率放大器。我們對(duì)高頻功率放大器和低頻功率放大器的共同要求是輸出功率大和效率高，但由于兩者的工作頻率和相對(duì)帶寬相差頗大，就決定了他們之間有根本的差異?；趦煞N放大器的不同特點(diǎn)，使得這兩種功率放大器所選的狀態(tài)有所不同：低頻功放工作于甲類、甲乙類或乙類（限于推挽電路）狀態(tài)，現(xiàn)在也出現(xiàn)了一些工作于丁類的低頻放大器；高頻功率放大器則一般工作于丙類（某些特殊情況可工作于甲類、乙類、丁類、戊類等） 。高頻放大器的主要技術(shù)指標(biāo)是輸出功率、效率、功率增益、帶寬和諧波抑制等。這幾項(xiàng)指標(biāo)往往是相互矛盾的，在設(shè)計(jì)功率放大器時(shí)，總是根據(jù)該放大器的工作特點(diǎn)，突出其中一些指標(biāo)，然后兼顧另外一些指標(biāo)?！锻ㄐ烹娮泳€路》課程設(shè)計(jì)IAbstractIn munication circuits, in order to pensate for signal transmission in the wireless transmitter in the attenuation requirements have greater power output, munication, the greater the distance the greater the required output power. In order to obtain a large enough highfrequency output power, highfrequency power amplifier must be used. Our highfrequency power amplifier and lowfrequency power amplifier output power of the mon requirement is large and high efficiency, but because of the work of both frequency and relative bandwidth vary considerably, we decided there is a fundamental difference between them. Based on two different characteristics of the amplifier, making the status of these two different from the selected power amplifier: lowfrequency power amplifier works in Category A, and B or Class B (limited to pushpull circuit) state, and now there have been some work on the small Class of lowfrequency amplifiers。 highfrequency power amplifiers are generally working in a Class C (in some special cases can work on the A, B, D, E, etc.). The main technical indicators of high
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