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    Item type:Publication, Access status: without files ,
    A fully integrated radar-based true-speed-over-ground sensor for highly dynamic road vehicles
    (IEEE, 2024-06)
    Albrecht, Nils Christian
    ;
    Langer, Dominik
    ;
    Kölpin, Alexander
    In this work, we introduce a novel radar-based groundspeed sensor (RGSS) capable of measuring the two-dimensional movement of road vehicles. Using four 122 GHz transceivers, the sensor features an update rate of 100 Hz suitable for highly dynamic driving scenarios. The system is compact and lightweight, with a fully 3D-printed dielectric lens assembly. We compare the proposed sensor system with a state-of-the-art optical groundspeed sensor (GSS), showing that similar accuracy and lower measurement noise can be achieved.
    Publicationtype: Conference Paper
      101
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    Item type:Publication, Access status: without files ,
    Integration approach for radar transceiver MMICs with integrated antennas enabling adaptability to customized passive frontend design
    (IEEE, 2024-06)
    Langer, Dominik
    ;
    Albrecht, Nils Christian
    ;
    Bartels, Frederike
    ;
    Tegowski, Bartosz
    ;
    Kölpin, Alexander
    Commercially available, low-cost radar transceivers tend to integrate all radio frequency (RF) components including the antennas, thus omitting an accessible RF interface. This limits their use for applications with special requirements, such as application-specific antenna designs. To overcome this drawback, a novel integration concept is presented that adapts integrated transceivers employing antennas-in-package (AiP) in radar systems with customized passive RF front-ends. The approach is demonstrated with a continuous-wave (CW) 61-GHz radar system tailored to the needs of medical research studies aiming to explore the morphology of the human pulse wave. The approach features 3D-printed freeform rectangular waveguides (RWG), an AiP-to-RWG transition, a 3D-printed horn fed lens antenna, and a directional coupler to implement a monostatic radar based on a commercial bistatic AiP-transceiver. Simulation and measurements validate the fulfillment of the application-specific requirements.
    Publicationtype: Conference Paper
      90