Design of a 24GHz FMCW radar system based on sub-harmonic generation

作者：El Agroudy Naglaa^*; El Shennawy Mohammed; Joram Niko; Effinger Frank

来源：IET Radar Sonar and Navigation, 2018, 12(9): 1052-1057.

DOI：10.1049/iet-rsn.2018.5050

• FM radar
• BiCMOS integrated circuits
• frequency dividers
• CW radar
• harmonic generation
• silicon-on-insulator
• radar interference
• sub-harmonic generation
• continuous wave radar system
• active reflector tag
• practical prototype
• baseband
• conventional primary radars
• strong multipath interferences
• FMCW radars
• FMCW radar system
• GF 7WL BiCMOS technology
• frequency divider-by-10
• GF-SOI technology
• indoor environment
• interrogating signal direct reflections
• size 22
• 3 cm
• frequency 24
• 0 GHz

This study presents a novel frequency modulated continuous wave (FMCW) radar system based on sub-harmonic generation, where a 24GHz frequency divider-by-10 is used as an active reflector tag. A practical prototype is designed and fabricated on a GF45nm-Silicon on Insulator (SOI) technology for the 24GHz building blocks, while a GF0.18 mu m 7WL Bipolar Complementary Metal Oxide Semiconductor (BiCMOS) technology was used for the 2.4GHz receiver and baseband. System measurement results show that as opposed to conventional primary radars, the proposed system is immune to strong multi-path interferences resulting from direct reflections of the interrogating signal. The system achieves a ranging precision of 3.7mm with loop measurements. Moreover, when measured in an indoor environment, the ranging results show a ranging precision and accuracy of 5.8 and 22.3cm, respectively, which outperform other FMCW radars in the literature.

• 出版日期2018-9