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本文介绍一种27MHz半集总参数定向耦合器的研制结果及其应用情况。在很宽的频率范围内,这种定向耦合器的最大特点是体积小、结构简单、方向性好于30 dB,耦合度可以根据需要进行选择。利用这种定向耦合器做成的电调移相器、相移变化很小的电调衰减器、脉冲调制器、相位调制器和鉴相器等都取得了令人满意的结果。
This article describes the development of a 27MHz semi-lumped directional coupler and its application. The most prominent feature of this directional coupler over a wide frequency range is its small size, simple structure, and better directivity than 30 dB, and the degree of coupling can be chosen according to your needs. Using this directional coupler made ESC, phase shift small changes in the electrical attenuator, pulse modulator, phase modulator and phase detector have achieved satisfactory results.