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本文叙述了一种比较简单实用的多模测量方法。用这种方法可以精确地测出多模噐件的传输模间的相对振幅和相对相位。测量范围可到四阶模区。只须使用不多的普通实验设备。对于测量矩形孔径多模馈源的具体情况,列出了计标公式。数据处理工作可用普通的计标工具较快地完成。
This article describes a relatively simple and practical multimode measurement method. With this method, the relative amplitude and relative phase between the transmission modes of a multimode element can be precisely measured. Measuring range up to the fourth order mode. Just use a small amount of common laboratory equipment. For the measurement of rectangular aperture multi-mode feed the specific circumstances, listed the calibration formula. Data processing work can be done faster with common calibration tools.