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Broadband millimeter wave radiometer channel model and verification

Author: ChenZuoLi
Tutor: ZhangYongHong
School: University of Electronic Science and Technology
Course: Electromagnetic Field and Microwave Technology
Keywords: Radiometer Time Domain Frequency domain Detector
CLC: TM931
Type: Master's thesis
Year: 2011
Downloads: 41
Quote: 0
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Abstract


Millimeter wave radiometer can detect the object radiation of millimeter wave signal strength , different radiation characteristics of target detection and recognition and imaging , with a wide range of applications in the field of missile guidance , remote sensing , atmospheric meteorological research and security . The full power of direct detection radiometer simple structure, high integration are widely used in the multi-channel radiometer system . This article will have full power direct detection radiometer structure to establish wideband channel model and validate , the main work is as follows : 1 . The broadband detector based model , the use of ADS and MATLAB software broadband millimeter-wave radiation timing and frequency domain model and analysis of the the radiometer channel devices characteristics of the radiometer system performance simulate the temperature sensitivity of the radiometer calibration points . 2 in order to verify the correctness of the radiometer channel model is developed two sets of full power radiometer systems , including low - noise amplifier, the detector device developed . S-parameters and the noise figure and the system of the microwave device and radiometer system temperature sensitivity and the integration time was tested. Voltage sensitivity of the detector in 35.5GHz-38.5GHz band to greater than 7000mV/mW, best response achieved 19450mV/mW . Low-noise amplifier gain at 30GHz-40GHz band is greater than 15dB, and the noise figure less than 4dB 35GHz-37.3GHz band . 3 would be the actual characteristics of the millimeter-wave devices measured parameters are substituted into the broadband radiation of frequency domain channel model and two sets of temperature radiometer sensitivity simulation analysis , simulation results reached a good agreement with the measured results . The broadband radiometer channel model parameters can be microwave device characteristics analysis of the radiometer system performance , can also be determined by the performance of the radiometer system design specifications of various microwave devices . And the model can be used with any band of great help to the design and performance of the radiometer estimates .

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CLC: > Industrial Technology > Electrotechnical > Electrical measurement techniques and instruments > Microwave measurement and instrumentation
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