An X-Band Radar Transceiver MMIC with Bandwidth Reduction in 0.13 µm SiGe Technology

Abstract

This paper presents an X-band chirp radar trans- ceiver with bandwidth reduction for range detection. The radar transceiver includes a super-het erodyne receiver including an ADC, a direct-digital synthesizer (DDS) based transmitter and a phase-locked loop (PLL) synthesizer. In a modi fied Weaver architecture, the down-conver ted baseband signal is further mixed with another chirp signal through stretch processing. The resulting waveform bandwidth is greatly reduced and thus relaxes the power and bandwidth requi rements of the on-chip ADC. Therefore, the proposed radar tr ansceiver achieves power and bandwidth reductions without degrading its range resolution. The radar-on-chip (RoC) MMI C was implemented in a 0.13 µm SiGe technology with die area of 3.5 × 2.5 mm 2. With a 2.2 V supply for analog/RF circuits and a 1.5 V supply for the digital portion, the chip consumes 326 mW in the receive mode and 333 mW in the transmit mode, respectively.