研究目的
To develop a simple and affordable 79 GHz FMCW radar evaluation system based on the PLL-Gunn oscillator and fundamental mixer for evaluating FMCW signal characteristics in the time-domain.
研究成果
The developed 79 GHz FMCW radar evaluation system is simple, affordable, and effective for evaluating FMCW signal characteristics in the time-domain, with potential for further compactness and cost-effectiveness.
研究不足
The linearity obtained by the MDO4140C mixed domain oscilloscope is approximately six times larger than the other results, possibly due to differences in the analyzing algorithm.
1：Experimental Design and Method Selection:
The system consists of a down-converter based on a fundamental mixer with a PLL-Gunn oscillator and a mixed domain oscilloscope or a digital oscilloscope.
2：Sample Selection and Data Sources:
An evaluation board of a millimeter-wave sensing device is used as a transmitter in an anechoic chamber.
3：List of Experimental Equipment and Materials:
Includes a PLL-Gunn oscillator, fundamental mixer, mixed domain oscilloscope (Tektronix MDO4104C), digital oscilloscope (Keysight DSO90804A), and signal analysis software.
4：Experimental Procedures and Operational Workflow:
The emitted FMCW signal is received and down-converted by the down-converter, then analyzed using the oscilloscopes and software.
5：Data Analysis Methods:
The down-converted signal is analyzed for chirp rate, chirp length, chirp width, and linearity using signal analysis software and real-time spectrum analyzer.
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