A first quarter wavelength portion extending in one direction from the signal source or feed point and a second quarter wavelength extending in the opposite direction from the signal source.

第一个四分之一波长部分在一个方向上从信号源或馈送点延伸，而第二个四分之一波长在相反的方向上从信号源延伸。

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Two arms of the interferometer are different in length by one -quarter of a guide wavelength, allowing the device to operate at its optimal linearity point without external electrical bias.

干涉仪的两个臂长相差波导波长的四分之一，使器件在最佳线性点工作，无需外加电偏压。

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Realize the way of broaden the band-width through making holes in the back of quarter-wavelength horn, and optimize the size of holes;

实现了在前盖板后端打孔的方式来拓宽频带宽度，根据数值模拟结果优选了打孔尺寸；

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