24 GHz transceiver front-end with two RX-channels

The paper presents a transceiver front-end MMIC intended for the operation in the license free ISM band from 24 GHz to 24.25 GHz and in the UWB band around 24 GHz. The radar principle is FMCW or Doppler. The chip comprises one transmitter with voltage controlled oscillator, power amplifier and two receivers with low-noise-amplifier (LNA) with gain control, quadrature mixers and poly-phase filter each. The functionality inside the chip is controlled via digital control interfaces for power and gain control. For frequency stabilization, an external PLL can be implemented in the radar system. For this, a frequency divider is integrated acting as prescaler. The chip is fabricated in SiGe BiCMOS technology with a chip area of 1.4 × 1.1 mm2.

[1]  I. Gresham,et al.  Si Based UWB Radar Sensors , 2007, 2007 IEEE Radar Conference.

[2]  H. Schumacher,et al.  A compact low-cost doppler sensor MMIC in SiGe technology for the ISM band at 24 GHz , 2004, 34th European Microwave Conference, 2004..

[3]  B. Senapati,et al.  A modular, low-cost SiGe:C BiCMOS process featuring high-f/sub T/ and high BV/sub CEO/ transistors , 2004, Bipolar/BiCMOS Circuits and Technology, 2004. Proceedings of the 2004 Meeting.

[4]  Wolfgang Winkler,et al.  Receiver Front-End MMIC for Low-Cost 24 GHz Radar Systems , 2006, 2006 International Radar Symposium.

[5]  S. O. Piper.  Homodyne FMCW radar range resolution effects with sinusoidal nonlinearities in the frequency sweep , 1995, Proceedings International Radar Conference.

[6]  Rajanish,et al.  A single-chip 24 GHz SiGe BiCMOS transceiver for FMCW automotive radars , 2009, 2009 IEEE Radio Frequency Integrated Circuits Symposium.