Broadband, Low-loss Chip-to-Waveguide Transition for a 140 GHz Hand-Gesture Recognition Radar

  • Motivation: A broadband radar provides a good range resolution, which is necessary for accurate detection of hand gestures. A current project at IHE aims at demonstrating a hand-gesture recognition radar at a high operating frequency of 140 GHz. Integrating the radar MMIC with a waveguide antenna, e.g. a  horn antenna will provide a high gain and narrow beamwidth, which will improve the maximum range and suppress undesired interferences, respectively. Therefore, a signal transition between a radar MMIC and a rectangular waveguide is required.

     

    Target: The radar MMIC is embedded in an eWLB-package (eWLB is a packaging technology from Infineon), which includes a dielectric layer, a metal layer and an array of solder balls. A substrate integrated waveguide (SIW) can be implemented in the eWLB-package. A signal transition should be developed between SIW and a rectangular waveguide, operating at a center frequency of 140 GHz. The student should investigate various methods for maximizing the bandwidth and minimizing the insertion loss of the signal transition.

     

    Equipment for manufacturing and measurement: A prototype of the signal transition can be manufactured and measured in the millimeter-wave laboratory at IHE.

     

    Prerequisites: Antenna fundamentals, CST Microwave Studio.

     

    This thesis can be written in German or English.

     

    Chip to Waveguide Transition - SIW with flip chip bumps.pdf