The increasing number of diabetic patients worldwide, especially in developed countries, requires an urgent need for better and painless alternatives to monitor blood glucose. The advantages of millimeter-wave sensors in the frequency range of 30-300 GHz in non-invasive monitoring include greater sensitivity to biological tissues and penetration of the skin without invasive procedures. This paper discusses the feasibility of using mmWave sensors for continuous glucose monitoring, based on variations in dielectric properties determined by blood glucose levels. This study focused on a miniaturized transceiver operating at 61 GHz based on FMCW radar; the usage scenario was within the frequency range of 60 to 64 GHz. The system adopts a digital signal processing-based approach to guarantee precise and reliable glucose measurements. The dimensions of the miniaturized transceiver are 76 × 56 × 27.6 mm, with excellent performance in detecting blood glucose levels from 25 mg/dL to 400 mg/dL. The R-squared value is more than 95%, indicating the high accuracy and reliability of the device in tracking glucose trends. This novel, non-invasive glucose monitoring technique holds great promise for real-time and accurate blood glucose detection, which would be more convenient and patient-friendly in diabetes management. Such a development opens a new door to an improved quality of life for diabetic patients and a potential reduction in complications associated with conventional invasive methods of monitoring.