Audio directional loudspeaker is a novel loudspeaker which can generate an audio signal with high directivity by utilizing the parametric array principle.
声频定向扬声器是利用参量阵原理，产生高指向性声频信号的新一代扬声器。
The directivity of curvilinear dipole is analysed by the basic principle of antenna array, the relationship between the directivity and the length of curvilinear dipoles is obtained.
本文利用天线阵基本原理近似分析了曲线振子的方向性系数，得到了方向性系数随曲线振子长度的变化关系，为曲线振子天线的进一步研究及设计提供参考。
This paper proposed a practical model for a high-directivity weak-coupling coaxial microwave coupler, based on the principle of coaxial directional coupler and a precise theoretical analyzing process.
从同轴定向耦合器的基本原理出发，提出了一种比较实用的高方向性弱耦合的同轴定向耦合器的模型。
This paper proposed a practical model for a high-directivity weak-coupling coaxial microwave coupler, based on the principle of coaxial directional coupler and a precise theoretical analyzing process.
从同轴定向耦合器的基本原理出发，提出了一种比较实用的高方向性弱耦合的同轴定向耦合器的模型。
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