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福州市区乌龙江大道正荣财富中心B座八层

动机：组合锁相环测量示例

图2所示为针对组合锁相环的测量示例。这些数据是通过组合来自多个ADRV9009收发器的发射输出获得的。图中所示为单个IC、两个组合IC和四个组合IC的情况。对于这个数据集，在IC组合之后，可以看到明显的10logN改进。为了达到这个结果，需要采用一个低噪声晶体振荡器参考源。下一节建模的动机是推导出一种方法，以计算在具有许多分布式收发器的大型阵列中，更广泛地说是在具有分布式锁相环的任何架构中，这种测量结果会如何变化。

图2.两个组合锁相环的相位噪声测量

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