一种新的无源偶极子天线辐射效率测量方法

提出一种无源超高频(UHF)射频偶极子标签天线在自由空间中辐射效率的测量方法并通过仿真和实验对其验证。辐射效率是标签天线的一个重要性能参数,通过测量标签天线的3个基本参数,即方向性系数、实际增益和功率传输系数得出结果,最后对比仿真与实测结果,两者取得良好的一致性,验证了该方法是可靠的。该方法的一个主要优点是可以在实际应用环境中对标签天线辐射效率进行测量,具有广阔的潜力。

A new radiation efficiency measurement method for passive dipole antenna

A radiation efficiency measurement method is developed for measurement of passive UHF RFID dipole tag antennas in free space and verified by simulating and measuring. The radiation efficiency is an important performance of tag antenna, we can obtain the results by calculating three basic parameters of tag antenna, they are realized gain, directivity and power transmission coefficient. The measured and simulated results are in good agreement, it indicates the method is reliable. One of the main advantages of the method is that the measurement can be conducted in the tag application environment, and has great potential.