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The linearity of a W-band frequency-modulated continuous-wave (FMCW) sensor is characterized and its impact on the range resolution of the sensor is evaluated in this paper. The millimeter-wave (mm-wave) FMCW waveform is designed and generated with a direct digital synthesizer (DDS) at base band and transferred to millimeter-wave by a combination of upconversion and multiplication. Both homodyne and...
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