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本文描述了一种电场互相关式的毫米波付里叶变换谱仪。该谱仪利用两列相位可控变化的伪随机二进制序列去分别调制同一微波源分出的两路微波场,得到两路可变相位延迟的宽带微波信号,这两路微波信号互相关函数的付里叶变换就是互功率谱。这种谱仪具有结构简单,分辨率高,易于实现等优点。文中描述了该谱仪的原理,基本结构,以及在8毫米波段实现的结果。
This paper describes a cross-correlation millimeter-wave Fourier transform spectrometer. The spectrometer utilizes two pseudo-random binary sequences whose phases can be controlled to change respectively to modulate two microwave fields separated by the same microwave source to obtain two wideband microwave signals with variable phase delay. The cross-correlation functions of the two microwave signals Fourier transform is mutual power spectrum. This spectrometer has the advantages of simple structure, high resolution and easy realization. The article describes the principle of the spectrometer, the basic structure, as well as the results achieved in the 8 mm band.