本文介绍介质波导定向耦合器的设计方法，并给出一些简单而有效的设计公式。
Design methods of directional couplers using dielectric waveguide are introduced in the paper. Some simplified and effective design formulae are also presented.
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。
The frequency multipliers and mixers are commercial MMICs, the signal separator is a broadband high directivity waveguide directional coupler.
结合BPM软件，完成了对单模波导、弯曲波导部分、定向耦合器和无源环形谐振器整体结构的模拟和设计。
The simulation and design of single mode waveguide, curve waveguide, directional coupler and monobloc construction of passive ring resonator have been accomplished by using BPM software.
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