Unverified80% confidenceTradeoffTime unknown
感应距离与贴片天线面积正相关:追求隐蔽小巧和追求灵敏读取存在矛盾,超薄迷你贴(直径15mm以下)牺牲感应距离,日常门禁贴选20-25mm是平衡点
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