Function: change the frequency of the incident RF key parameters ---------------------------------------…

1Create carrier:谐振器,如433.92Mhz LC谐振 (频偏控制) 2Add data to carrier 加载数据 3Amplify to broadcast :放大器,如NPN三极管射级电路 baseband processor:把信息数字化-变成二进制(编程定义) modulator:调制电路 Antenna:标准天线 ----------------------------------------------------------- The simplest rad…

 Vector modulator 矢量调制器:调整信号的幅度和相位 http://www.21ic.com/app/test/201805/762401.htm…

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-------------------------------------------------------------------------------------------------------- Oscillator  characterization -----------------------------------------------------------…

LNA:Low-Noise Amplifier PA: Power Amplifier1 VGA: Variable-Gain Amplifier  DC input Bias Volatage, Bias Current -----------------------------…

2考虑两个因素 3 RX 4 TX RX switch use Duplexer…

1 Impedance match: 2 distortions: Solar radiation produces background noise…

1Amplitude AM调制 2 Frequency FM调制 3Phase Phase 调制 复合调制 三者关系:…

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