A Ka-Band Radar Receiver with Built-in X8 Multiplier

This paper proposes a 32 GHz band radar receiver with an X8 multiplier. The Ka-band Rx chip used in the was fabricated by using 28-nm complimentary metal-oxide-semiconductor (CMOS) process and its built-in multiplier enables to driven low reference signal of 4 GHz. designed attached ground plane microstrip patch antenna connected feedline via bonding wire. impedance matching circuit implemented along considering changes caused input signal, intermediate frequency (IF) output, bias were supplied on FR4 substrate cavity, which enabled easy implementation module without requiring expensive precise packaging technology. performance verified over-the-air (OTA) test.