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IWR6843AOP: AOP天线挖空区域的相关疑问

Part Number: IWR6843AOP

TI专家您好,

请问这个帖子中的PCB天线挖空区域的要求是出自哪个文档? 我查询了能找到的所有AOP设计相关的文档,没有发现哪个文档有提出类似的要求,烦请告知,非常感谢。

是不是说只要PCB大于芯片的投影面积,那么PCB就要做相应的挖空呢?

https://e2echina.ti.com/support/sensors/f/sensors-forum/368028/iwr6843aop-pcb?keyMatch=PCB%E5%A4%A9%E7%BA%BF%E5%8C%BA%E5%9F%9F%E6%8C%96%E7%A9%BA%E9%97%AE%E9%A2%98

谢谢。