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CC1310: CC1310 433M射频匹配

Part Number: CC1310

请教一下,CC1310 433M这块想用弹簧天线,看手册上推荐的433M后面的电路匹配参数(如图上参数值),但测了一下驻波比是18,很大,自己优化了一下,但只能优化到6左右,还是有点大,但是再很难优化下去,希望各位大神指导一下。顺便问一下,用弹簧天线是这样设计的吗?还有,驻波比是不是从L8左端的点进行测试?