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是用巴伦匹配电路还是用滤波器，类似于LFB182G45BG2D280，都可以么？还是只能用巴伦电路
建议参考TI的官方参考设计 http://www.ti.com.cn/tool/cn/CC2540EM-RD?keyMatch=CC2540&tisearch=Search-CN
CC2540页面下有个文档，关于天线选择的。当然，用参考设计更简单
