Skip to main content Accessibility help
×
Home

Digital-beam-forming extension for a two-channel E-band FMCW-sensor

  • Markus Goppelt (a1), Peter Feil (a2) and Winfried Mayer (a3)

Abstract

A general purpose two-channel Frequency modulated continuous wave (FMCW)-sensor in E-band is extended to a digital-beam-forming (DBF) system. The hardware extension contains a transmit multiplexer, which allows switching of the (DBF) transmit signal of the sensor to any of 32 linearly arranged waveguide antennae. To maintain the spatial sampling condition by λ/2 element distance, the antenna ports are arranged in the E-plane. The ports can directly radiate or serve as primary radiators of a cylindrical dielectric lens focusing in the H-plane. By realizing the hardware extension based on a metal-backed substrate, some novel radio frequency (RF) structures became necessary. One of these structures is a special twisting microstrip-to-waveguide-transition to connect the switching matrix to waveguide ports arranged in the E-plane. Key elements of the multiplexer are commercially available pin-diode-based MMIC-switches in microstrip technology. To lower the inductance of the interconnects, they are embedded in cavities in the metal-backed RF-substrate. RF interconnects between the sensor and the extension are all done with waveguide ports. Further interconnects between the module and the extension are low-frequency or digital and are led via cables and removable plugs. Both module and extension can be powered separately. This gives an easily mountable extension for making a two-dimensional (2D) DBF sensor out of a 1D FMCW-sensor.

Copyright

Corresponding author

Corresponding author: Markus Goppelt Email: markus.goppelt@gmx.net

References

Hide All
[1]Winkel, R.; Hahn, M.; Augustin, C.; Nienhaus, K.: Using high performance 2D radar for mine equipment automation and obstacle detection, in CIM ICMAPCOM, Vancouver, BC, Canada, 2010, 7683.
[2]Widzyk-Capehart, E.; Brooker, G.; Scheding, S.; Hennessy, R.; Maclean, A.; Lobsey, C.: Application of millimetre wave radar sensor to environment mapping in surface mining. in Ninth Int. Conf. on Control, Automation, Robotics and Vision, ICARCV, December 2006, 173178.
[3]Winkel, R.; Nienhaus, K.; Mayer, W.; Gronau, A.; Menzel, W.: An experimental study on using electronically scanning microwave radar systems on surface mining machines, in IEEE Radar 2007, Proc., April 2007, 509512.
[4]Mayer, W.; Buntz, S.; Leier, H.; Menzel, W.: Imaging radar sensor front-end with a large transmit array, in European Radar Conf. (EuRad), Conf. Proc. Bd. 3, 2004, 153156.
[5]Mayer, W.; Gronau, A.; Menzel, W.; Leier, H.: A compact 24 GHz sensor for beam-forming and imaging, in Ninth Int. Conf. on Control, Automation, Robotics and Vision, ICARCV, December 2006, 153158.
[6]Feil, P.; Migliaccio, C.; Kraus, T.; Menzel, W.: Short range mm-wave imaging and applications, presentation on Topical Meeting of ITG-Fachausschuss Mikrowellentechnik, University of Erlangen, Germany, October 2009.
[7]Feil, P.; Chaloun, T.: Active Switched Antenna Array for 77 GHz Digital Beam-forming Radar, Proceedings of the 5th European Conference on Antennas and Propagation (EUCAP), 2011, 29512953
[8](Taconic advanced dielectric division: a new low loss, laser ablatable substrate for microwave circuitry), Microw J., (2004), 104110.
[9]MILL-MAX: Discrete Spring Loaded Contacts 0922.
[10]CST Microwave Studio 2008.
[11]Schulwitz, L.; Mortazawi, A.: Miniature dual polarized L-shaped horn antenna array for broadband millimeter-wave electronically scanned arrays, in Proc. EuCAP, Nice, France, November 2006.
[12]Xu, F.; and Wu, K.: Guided-wave and leakage characteristics of substrate integrated waveguide. IEEE Trans. Microw. Theory Tech., 53 (1) (2005), 6673.
[13]Feil, P.; Bauer, F.: Two right-angle microstrip to waveguide transitions suitable for metal backed substrates, in Proc. Int. Conf. on Electromagnetics in Advanced Applications, (2010), 450453.

Keywords

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed