CC2500射频模块,匹配50欧天线的阻抗是在哪匹配,RF_N,RF_P两个引脚后面的电容电感也起到阻抗的作用,那我是在微带线上设置宽厚匹配天线阻抗吗
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参考TI CC2500 的参考设计(swrr016a),就是在那个Pi 型电路的后面加个 L 型的匹配。当然单端走线也应该用微带线控制阻抗在50 Ohm。
除了完全Copy TI的参考设计,在天线前面(Pi型滤波器后面)再留个 L 型的匹配电路。
参考设计:
http://www.ti.com/tool/CC2500EM_REFDES?keyMatch=cc2500&tisearch=Search-EN
布板参考:
http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=swra367&fileType=pdf