Broad band and high resolution ratio millimeter wave and sub millimeter wave signal detecting system
A signal detection, high-resolution technology, applied in the field of millimeter-wave and submillimeter-wave signal detection systems, can solve the problems that high-resolution spectrum analysis and broadband signal detection cannot be realized at the same time.
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[0027] As shown in Figure 1, the broadband and high-resolution millimeter wave and submillimeter wave signal detection system consists of a spectroscopic system 1, a detector 2, a circuit system 3 and a data processing system 4.
[0028] The optical splitting system 1 is used to convert the signal into two beams with optical path difference, and then the two beams are converged to provide the detector 2, and is used to convert the signal into two beams with zero (very small) optical path difference , together with the phase-locked local oscillator signal 12 with the required frequency and power set, are collected to the detector 2 . The optical splitting system 1 is composed of a Michelson interferometer 11 , a broadband beam splitter 13 and a phase-locked local oscillator signal source 12 . The broadband beam splitter 13 has a high transmittance for the output signal of the Fourier unit 12 and a low reflectivity for the local oscillator signal 11 .
[0029] Detector 2 adopts...
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