Free-Space Transmission Dielectric Properties Measurement Based on Six-Port Technology
Free-Space Transmission Dielectric Properties Measurement Based on Six-Port Technology
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基于六端口技术的自由空间传输介电性能测量
DOI：
10.1109/tim.2021.3084292
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发表时间：
2021
影响因子：
5.6
通讯作者：
S. Trabelsi
中科院分区：
文献类型：
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作者：
S. Julrat;S. Trabelsi
开发了一种传输模式下的六端口技术，用于精确测定空间测量中低损耗材料的介电特性。通过六端口网络中端口1和端口2入射波的比值获得传输系数，同时在端口3-6进行功率读数。端口1处的入射波来源于通过材料样品的正向传播电磁波。端口2的入射波是端口1入射波在穿过材料之前或之后的参考信号。开发了标定函数。为了验证所提出的六端口测量技术，在5.8 GHz下进行了演示。材料样品放置在发射天线和接收天线之间。来自振荡器的微波信号被送入发射天线。接收天线收集信号并将其发送到端口1。在端口2设置了两个配置，要么连接到振荡器的微波信号，要么以电负载终止。不同厚度介质板的幅值和相位测量结果与商用自动矢量网络分析仪（ANA）的测量结果进行了比较。同样，聚丙烯、丙烯酸和缩醛球的介电性能测量结果也与ANA得到的结果吻合得很好。
A six-port technology operating in transmission mode was developed for accurate determination of dielectric properties of low-loss materials from space measurements. The transmission coefficient was obtained by using the ratio of incident waves at ports 1 and 2 of the six-port network, while the power readings were performed at ports 3–6 simultaneously. The incident wave at port 1 originated from a forward propagating electromagnetic wave passing through the material sample. The incident wave at port 2 was the reference signal related to the incident wave at port 1 before or after propagating through the material. The calibration function is developed. The proposed six-port measurement technique was demonstrated at 5.8 GHz for purpose of verification. The material sample was placed between transmitting and receiving antennas. The microwave signal from the oscillator was fed to the transmitting antenna. The receiving antenna collected the signal and sent it to port 1. Two configurations were set up at port 2, either connected to the microwave signal from the oscillator or terminated with an electrical load. Magnitude and phase measurement results for various thicknesses of dielectric slabs compared well with those obtained with a commercial automatic vector network analyzer (ANA). Similarly, dielectric properties measurements on polypropylene, acrylic, and acetal spheres also agreed well with those obtained by the ANA.