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我希望CC2530传输距离能够达到4~5KM

Other Parts Discussed in Thread: CC2591, CC2530, CC1101

我想在CC2530后级加PA和LNA得到更远的传输距离,但是CC2591能够支持的最大功率不到1W,其距离也就在2KM左右,如何能够让距离达到4~5KM呢?是在CC2591后级再加一级PA和LNA么?还是能够有其他更好的办法??