20m調(diào)頻發(fā)射機的設(shè)計與制作_畢業(yè)論文-全文預覽
【正文】 8 諧振功放的設(shè)計 ............................................................................................................... 8 ：高頻功放的簡介 ...................................................................................................... 8 諧振功放的工作原理： .............................................................................................. 9 輸出功率以 及效率 .................................................................................................... 11 諧振功率放大器的動態(tài)特性 ......................................................................................12 諧振放大器電路的設(shè)計 .............................................................................................15 信號的發(fā)射 ..................................................................................................................... 16 三、 試驗 數(shù)據(jù)的測量與分析 ............................................................................ 17 四、參考文獻： .................................................................................................. 19 五、附錄 ............................................................................................................. 20 、系統(tǒng)總圖 ...................................................................................................................... 20 PCB TopLayer 圖 ............................................................................................................ 20 PCB BottomLayer 圖 ...................................................................................................... 21 實物圖 ............................................................................................................................. 21 元件清單 ......................................................................................................................... 21 六、 致謝 ........................................................................................................... 22 2 摘要 調(diào) 頻發(fā)射機作為一種簡單的通信工具，由于它不需要中轉(zhuǎn)站和地面交換機站支持，就可以進行有效的移動通信，因此深受人們的歡迎。首先輸入信號控制變?nèi)荻O的電容值大小，進行變?nèi)荻O管部分接入的電容三點式調(diào)頻，產(chǎn)生調(diào)頻信號。 關(guān)鍵詞：變?nèi)荻O管，電容三點式， LC 諧振放大， 3 Abstract FM transmitter as a simple munication tool, because it does not need to transfer station and the ground switch station support, can be effective mobile munication, therefore is popular among people. Convenient and widely used in the production, security, field engineering in areas such as small scale of mobile munication engineering. This time we mainly to design a frequency of 20 MHZ FM transmitter, FM was carried out on the input signal. First the input signal control varactor diode capacitance value size, for varactor part connected to the threepoint capacitance frequency modulation, frequency modulation signal is produced. Frequency modulation signal of twostage LC resonance power amplifier, power is greatly increased, the high
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