Mutual impedance in terms of directivity and radiation resistance .
用定向性和辐射电阻表示的互阻抗。
Directivity of circular loop antennas with uniform current .
载有均匀电流的圆环天线的定向性。
There is strong evidence that the actors wore masks that were fitted out with small megaphones to assist in increasing the directivity of the voices .
有确凿证据表明当时的表演者们戴着装有小型扩音器的面具,以辅助声音的方向性传播。
Directivity of uniformly excited , equally spaced linear arrays .
均匀激励等间隔线性阵列天线之指向性。
This dissertation presents the research and applications of microstrip coupler with high directivity .
本论文主要在研究高指向性微带结构及其应用。
There are some problems in the scholarship system , such as great disparity , strong group directivity , the defects of national scholarship policy .
奖学金制度存在着差别较大、群体指向性强和国家级奖学金政策缺陷等问题。
The waveguide shape of the tweeter and sound axis control guarantee wide directivity , so you pick up the high-quality sounds wherever you are positioned .