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.
Inactive Publication Date: 2008-02-20
ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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[0009] In order to overcome the above-mentioned prior art, the superheterodyne mixing signal detection system can realize high-resolution spectrum analysis through superheterodyne mixing technology, and cannot realize broadband signal detection at the same time, and the direct detection signal detection system can realize broadband through direct detection technology Signal detection cannot realize the deficiency of high-resolution spectrum analysis at the same time. The present invention provides a new technical solution, broadband and high-resolution signal detection system. The device will use a single high-sensitivity superconducting SIS (Superconductor-Insulator-Superconductor) device, Simultaneous wideband and high frequency resolution signal detection
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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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The utility model relates to a measuring system of broadband and high resolution millimeter wave signals and submillimeter wave signals, aiming at providing a measuring system to achieve the signal measuring of both the broadband and the high frequency resolution at the same time. The utility model adopts the technical proposal that: a superconducting SIS detector is arranged in the system to measure broadband signals by direct detection and the narrowband high resolution signal is measured through superhet frequency mixing; the measuring system realizes the analysis of broadband signal detection frequency through direct detection and realizes the analysis of narrowband high resolution signal detection frequency through superhet frequency mixing. The utility model adopts superconducting SIS detector, which is used as a frequency mixer in superhet frequency mixing method and as a direct detector in direct detection method, realizing the fast broadband scanning and the detection of narrowband high resolution frequency by the combination of the two methods of measuring the millimeter wave and submillimeter wave frequency signals.
Description
technical field [0001] The invention relates to a millimeter wave and submillimeter wave signal detection system, in particular to a broadband and high resolution millimeter wave and submillimeter wave signal detection system. Background technique [0002] At present, the spectrum detection of millimeter wave and submillimeter wave band signals is widely used in the fields of radio astronomy, earth's atmospheric environment, radar signal, space technology, medicine and biology, etc., and it is mainly realized by means of spectrum analysis equipment. A spectrum analyzer is one of the essential measuring instruments for signal spectrum analysis. At present, the working frequency bands of common commercial spectrum analyzers are mostly concentrated in the microwave band. This kind of spectrum analyzers use scanning or real-time methods to realize the measurement and analysis of signals and their harmonic components. However, even a scanning spectrum analyzer can achieve spectr...
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IPC IPC(8): G01R23/16G01R23/17
Inventor 史生才林镇辉姚骑均杨戟李婧张文
Owner ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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