free space transmission 自由空间传输
free-space transmission loss 自由空间传输损耗
free space transmission system 自由空间传输
free space wideband transmission 自由空间宽带传播
free space basic transmission loss 自由空间基本传输损耗
To simulate transmission conditions of EM wave in free space, the biomedical microwave anechoic chamber used for biomedical engineering research was developed.
为模拟电磁波在自由空间的传输状态，研制了用于生物医学工程研究的大型专用微波暗室。
To resolve this problem, a free space transmission system for optical signals is developed on base of diffraction effect of acoustooptic crystal.
由于电信号传输系统保密性和抗干扰能力差，为此，利用声光晶体的衍射效应研制了一种光信号自由空间传输系统。
The input impedances of the double-loop antenna in free space are also calculated, and the results obtained are compared with those from transmission line transformation of ca…
还计算了自由空间的双环天线的输入阻抗，将结果和由单环的计算值经传输线变换而获得的结果作了对比。
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