电场互相关式毫米波付里叶变换谱仪

An Electric-Field Cross-Correlation Fourier Transform Millimeter Wave Spectrometer

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。

An electric-field cross-correlation Fourier transform spectrometer worked in the region of millimeter waves is described.It uses two controllable phase variation pseudorandom binary sequences (PRBS)to modulate individually two micr- owave fields derived from the same source,and two wide bandwidth microwave signals with variable phase delay between them are obtained.The Founier transform of the cross-correlation function of the two microwave signals is the cross-power spectrum. This spectrometer has many advantages such as simple structure,high resolution, easy realization etc.The principle and fundamental structure of the spectrometer are ntroduced and experimental results are given in 8mm-wave range.