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。
Millimeter-wave dielectric lens antenna is a kind of aperture antenna with high directivity.
毫米波介质透镜天线是一种高方向性的口径天线。
The frequency multipliers and mixers are commercial MMICs, the signal separator is a broadband high directivity waveguide directional coupler.
扩频模块中的倍频和变频器件采用商业MMIC芯片，信号分离器件采用自行设计的宽带高方向性波导定向耦合器。
Directional coupler is widely used in modern microwave system, how to test directional coupler's directivity with high directivity is a difficulty.
定向耦合器广泛地用在现代微波系统中，高方向性定向耦合器的方向性测试是其难点。
A novel audio beam loudspeaker which based on nonlinear propagation effects of ultrasonic in the air to generate audible sound with high directivity is presented.
提出了一种利用空气中超声波非线性传播效应制作的、可产生高指向性可听声的新型声束扬声器。
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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