“超外差接收”的概念、定义、翻译、参考文献-科学参考

单词	超外差接收
释义	超外差接收 Encyclopedia 工学【通信基础理论】释 superheterodyne receiving超外差接收将接收到的已调高频信号（即调制后的高频信号）送到混频器，然后与本地振荡器所产生的高频信号进行混频，在其输出端得到的波形包络形状与输入高频信号相同，但频率却降为某一固定中间频率（简称中频）的信号接收技术。
随便看	ground atom ground-based astronomy ground based augmentation system ground-based augmentation systems Ground-based Boxing ground-based integrated observation system Ground-based interceptor ground-based manned experimental system of bioregenerative life support system ground-based measure method for spacecraft microvibration environment ground-based midcourse defense system ground-based observation ground-based observatory ground-based remote sensing of atmosphere ground-based telescope ground bearing capacity ground beetle Ground buried line system ground calcium carbonate ground check on airborne geophysical anomaly ground check on airborne magnetical anomaly ground clause ground configuration ground cosmic rays enhancement ground coupled heat pump ground covered structure/ Earth sheltered structure

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。