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CC2530输出功率低的问题

Other Parts Discussed in Thread: CC2530

 我在CC2530经过lc巴伦后的2.2pf电容后面测的输出功率只有-6db,和数据手册上的输出功率4.5db差很多。不知道是哪里有问题。附件是我的原理图和PCB图。