CAJ | 학술논문

给出了天线方向图比较法和自由空间电压驻波比法两者的对照，这2种方法可用于评估无线电吸波暗室的反射电平。在分析这2种方法之后，指出了哪些参数会影响反射电平的测量值。通过实验结果的对照，揭示了为什么在采用这2种方法时会得到不尽一致和不相关联的结果，进而还表明当吸波暗室性能获得改进之后，如何利用反射电平来衡量这种改进。基于目前的研究成果，描述了吸波暗室性能的评估步骤。同时，还通过举例指出有必要开展进一步的研究，以便归纳出满意的评估步骤。
급출료천선방향도비교법화자유공간전압주파비법량자적대조，저2충방법가용우평고무선전흡파암실적반사전평。재분석저2충방법지후，지출료나사삼수회영향반사전평적측량치。통과실험결과적대조，게시료위십요재채용저2충방법시회득도불진일치화불상관련적결과，진이환표명당흡파암실성능획득개진지후，여하이용반사전평래형량저충개진。기우목전적연구성과，묘술료흡파암실성능적평고보취。동시，환통과거례지출유필요개전진일보적연구，이편귀납출만의적평고보취。
A comparison between the antenna-pattern comparison technique and the free-space voltage standing-wave ratio technique for evaluating the reflectivity level of radio anechoic chambers is presented. Based on an analysis of the two techniques, it is pointed out which parameters influence the measured value of the reflectivity level. The comparison is illustrated with experimental results and it is explained why inconsistent and uncorrelated results may be found when the two methods are used. Furthermore, it is demonstrated, by introducing improvements in a chamber, how the reflectivity level can be used to measure the improvements. This work is inspired by the current discussion of finding a figure of merit for anechoic chambers. Based on the results, an evaluation procedure for anechoic chambers is indicated. However, it is pointed out and illustrated by examples that further investigations are necessary before a satisfactory procedure can be outlined.