Fraunhofer-Institut für Zuverlässigkeit und Mikrointegration IZM

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  • Publication
    A compact W-band LFMCW radar module with high accuracy and integrated signal processing
    ( 2015)
    Zech, C.
    ;
    Hülsmann, A.
    ;
    Schlechtweg, M.
    ;
    Reinold, Steffen
    ;
    Giers, Christof
    ;
    Kleiner, Bernhard
    ;
    Georgi, L.
    ;
    Kahle, R.
    ;
    Becker, K.-F.
    ;
    Ambacher, O.
    In this paper, a compact W-band radar module will be presented, design aspects will be discussed and some measurement results of the finally realized module will be shown. The module features an integrated signal generation, full signal processing and power distribution. The signal generation is based on a phase-locked loop, optimized for linear frequency-modulated continuous-wave operation. A digital signal processor also works as internal controller and pro-vides the digital interfaces. Due to the integrated power distribution, a single 7 to 15V power supply is necessary. In contrast to most state-of-the-art W-band systems using waveguides, a liquid crystal polymer based printed circuit board with integrated antenna and dielectric lens is used to realize a very compact module size of 42mm x 80mm x 27mm and low weight of 160 g. The total power consumption is 5 W, the radio frequency output power is 3dBm and the linear frequency modulated contimuous-wave radar bandwidth is 14 GHz. The evaluated distance measurement repeatability of the module is 5 ppm (5µm deviation per meter target distance).
  • Publication
    Radar based detection and tracking of objects under poor visibility conditions
    ( 2013)
    Ens, A.
    ;
    Zech, C.
    ;
    Hülsmann, A.
    ;
    Georgi, L.
    ;
    Becker, K.-F.
    Places which have to be monitored permanently (such as security sectors, industrial areas or power plants) are facing the problem of large-area monitoring. Optical security cameras can observe such areas under good lighting and visibility conditions, but objects might get invisible when fog, darkness or smoke reduces the visibility. This problem can be solved with millimeter-wave radars with very high slew rates of the chirp signal. The radar has a detection range of above 100m and can determine the distance and speed of objects inside the observation area very precisely. For most applications, the positon of objects is more important than their color or size.