Researchers are eager to produce 'non-contact' biometric systems that can check any individual's identity at a distance.

研究人员热切希望生产出“非接触性”生物识别系统，能在远处对所有个体进行身份认证。

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Based on linear frequency modulation continuous wave (FMCW) technique, we have developed a distance measurement method for non contact and non integrating error measurement.

给出一种以频率调制连续波（FMCW）技术为基础的进行无接触、无累加误差和较大动态范围距离测量方法。

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Method of calculation for the non-contact IC card chip coupling power supply and the read and write distance were analyzed, and the relative low-voltage circuit designs were introduced.

分析了非接触式IC卡芯片耦台电源及读写距离的计算方法，并简要介绍了相关低压电路的设计技术。

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