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IEEE Microwave and Guided Wave Letters
Volume 10 Number 9, September 2000

Table of Contents for this issue

Complete paper in PDF format

A FET Transceiver Suitable for FMCW Radars

Klas Yhland and Christian Fager Student Member, IEEE

Page 377.

Abstract:

We present a new FET transceiver suitable for frequency modulated continuous wave (FMCW) radars. The circuit obviates the need for dual antennas,a circulator, or a coupler for the separation of the transmit and receive signal paths. A FET is used simultaneously as an amplifier for the transmitted signal and as a resistive mixer for the received signal. At the optimum bias point, the circuit has an output power of 7 dBm and a conversion loss of 9 dB. Also, the noise performance is investigated. The circuit performance is shown to be insensitive to bias voltage variations. Furthermore, the transceiver's simple topology makes it suitable for commercial high-volume applications.

References

  1. K. W. Chang, G. S. Dow, H. Wang, T. N. Chen, K. Tan, B. Allen, I. Berenz, J. Wehling and R. Lin, "A W-band single-chip transceiver for FMCW radar", Proc. 1993 IEEE Microwave and Millimeter-Wave Monolithic Circuits Symp. Dig., vol. 1, pp.  41-44, 1993.
  2. H. D. Griffiths, "New ideas in FM radar", IEE Electronics and Communication Eng. J., vol. 2, pp.  185-194, Oct.  1990.
  3. D. D. Li, S. C. Luo, C. Pero, W. Xiaodong and R. Knox, "Millimeter-wave FMCW/monopulse radar front-end for automotive applications", Proc. 1999 IEEE MTT-S Int. Microwave Symp. Dig., vol. 1, pp.  13-19, 1999.
  4. L. Reynolds and Y. Ayasli, "Single chip FMCW radar for target velocity and range sensing applications", Proc. 11th Annu.GaAs IC Symp. Dig., vol. 1, pp.  243-246, 1989.
  5. M. Nalezinski, M. Vossiek and P. Heide, "Novel 24 GHz FMCW front-end with 2.45 GHz SAW reference path for high-precision distance measurements", Proc. 1997 IEEE MTT-S Int. Microwave Symp. Dig., vol. 1, pp.  185-188, 1997.
  6. J. Kehrbeck, E. Heidrich and W. Wiesbeck, "A novel and inexpensive short range FM-CW radar design", Proc. IEE Int. Conf. Radar, vol. 1, pp.  288-291,  1992.
  7. S. A. Maas, "FM-CW radar transceiver", U.S. Patent 5 596 325, Jan. 21, 1997 .
  8. S. A. Maas, "GaAs MESFET mixer with very low intermodulation", IEEE Trans. Microwave Theory Tech., vol. MTT-35, pp.  425-429, Apr.  1987.