液货船上主无线电发射机天线已接地且雷达已关掉？
Are the ship's main radio transmitter aerials earthed and radars switched off?
与哑铃形缺陷地结构相比，分形缺陷地结构不仅能更好的提高微带天线性能，还能减少刻蚀接地板的面积，提高地板利用效率。
The fractal defected ground structure not only improves the performance of antenna better, but also uses the area of ground more efficiently than the dumbbell defected ground structure.
天线须适当地接地以防电击，并须牢固地架设。
The aerial shall be suitably earthed to guard against lightning strikes and shall be securely mounted.
系统地研究了架设在凹形接地面上的倒l天线的电特性。
This paper investigates the inverted L antennas mounted on a conducting concave surface.
共振频率可以改变被动的加载与调谐组件，它可与天线单元和接地层放置天线。
Resonant frequency can be changed by loading the antenna with a reactive tuning component, which can be placed between the antenna element and the ground plane.
一天线结构，包括一接地面、至少一有源元件、至少一电流诱导单元、一控制器。
Antenna structure includes a ground plane, at least one active component, at...
固定天线：推荐在接地板上使用双面胶带。
Fixing the Antenna: Use of a double-faced adhesive tape on the grounding plate is recommended.
微带天线是在带有导体接地板的介质贴片上贴加导体薄片而形成的天线。
Microstrip antennas are structured by patches printed on substrate which is added with ground plane.
该天线满足电讯设计需求，且避免采用接地板背腔开工艺孔的方法。
The antenna can meet the microwave design and avoid the drilling holes in ground plate.
天线辐射板(3)向外伸出，使得它的至少主要部分不面对接地板(4)。
At least most of an antenna radiation plate (3) is protruded to the outside not to face a ground bottom board (4).
天线辐射板(3)向外伸出，使得它的至少主要部分不面对接地板(4)。
At least most of an antenna radiation plate (3) is protruded to the outside not to face a ground bottom board (4).
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