The radiating element of array antenna is air dielectric microstrip patch antenna, which has high efficiency, and the feed network is low loss air strip, which can reduce the loss of the feed line.

阵列天线辐射单元采用空气介质的微带贴片天线，辐射效率高；阵列天线的馈线网络采用低损耗的空气带状线形式，降低了馈线损耗。

youdao

The relations between dielectric, Numbers of circles and the characteristic parameters of the helical line were studied.

通过实验研究了充电介质、螺旋匝数及形成线结构与螺旋脉冲形成线特性参量间的数值关系。

youdao

Precision of on-line dielectric loss factor monitoring can be affected by environmental factors, so it is necessary to modify it.

电容型设备介质损耗因数的在线监测会受到环境因素的影响，对其进行合理修正非常必要。

youdao