2025

• Vintage antennas: a 3D-printed future
  Bartels, Frederike; Langer, Dominik; Kölpin, Alexander
  IEEE Microwave Magazine 26 (6): 153-160 (2025)
  Publisher DOI
• 3D-printed surface-mounted waveguide technology
  Tegowski, Bartosz; Langer, Dominik; Kölpin, Alexander
  16th German Microwave Conference Gemic 2025
  Publisher DOI
• Systematic Investigation of Heart Sound Propagation using Continuous Wave Radar
  Oesten, Marie; Abel, Luca; Albrecht, Nils Christian; Richer, Robert; Langer, Dominik; Grießhammer, Stefan; Ghanem, Khalida; Steigleder, Tobias; Ostgathe, Christoph; Kölpin, Alexander; Eskofier, Björn
  IEEE Journal of Biomedical and Health Informatics (in Press): (2025)
  Publisher DOI
• 60GHz leaky-wave antenna design for SISO radar systems with angle estimation
  Gabsteiger, Jasmin; Langer, Dominik; Dorn, Christian; Kölpin, Alexander; Lurz, Fabian
  IEEE Radio and Wireless Symposium, RWS 2025
  Publisher DOI

2024

• Near-field scattering phenomena in monostatic radar applications derived from physical optics
  Tegowski, Bartosz; Langer, Dominik; Wenzel, Marvin; Albrecht, Nils Christian; Kölpin, Alexander
  IEEE Transactions on Antennas and Propagation 73 (2): 1084-1094 (2025)
  Publisher DOI
• EmRad: ubiquitous vital sign sensing using compact continuous-wave radars
  Albrecht, Nils Christian; Langer, Dominik; Krauss, Daniel; Richer, Robert; Abel, Luca; Eskofier, Bjoern M.; Rohleder, Nicolas; Kölpin, Alexander
  IEEE Open Journal of Engineering in Medicine and Biology 5: 725-734 (2024)
  Open Access | Publisher DOI
• Print! Place! Perform! : additively manufactured surface-mounted bandpass filter in X band
  Tegowski, Bartosz; Langer, Dominik; Sieganschin, Anton; Wenzel, Marvin; Kölpin, Alexander
  IEEE Microwave Magazine 25 (6): 80-87 (2024)
  Publisher DOI
• A fully integrated radar-based true-speed-over-ground sensor for highly dynamic road vehicles
  Albrecht, Nils Christian; Langer, Dominik; Kölpin, Alexander
  IEEE/MTT-S International Microwave Symposium, IMS 2024
  Publisher DOI
• Integration approach for radar transceiver MMICs with integrated antennas enabling adaptability to customized passive frontend design
  Langer, Dominik; Albrecht, Nils Christian; Bartels, Frederike; Tegowski, Bartosz; Kölpin, Alexander
  IEEE/MTT-S International Microwave Symposium, IMS 2024
  Publisher DOI
• A modular 61 GHz vital sign sensing radar system for long-term clinical studies
  Wenzel, Marvin; Langer, Dominik; Kölpin, Alexander; Lurz, Fabian
  IEEE Topical Conference on Wireless Sensors and Sensor Networks, WiSNeT 2024
  Publisher DOI

2023

• Characterization of the influence of clothing and other materials on human vital sign sensing using mmWave radar
  Albrecht, Nils Christian; Weiland, Jan Philipp; Langer, Dominik; Wenzel, Marvin; Kölpin, Alexander
  53rd European Microwave Conference (EuMC 2023)
  Publisher DOI
• The Design Process for Monolithically Manufactured Millimeter-Wave Antenna Arrays Using Stereolithography 3D Printing
  Langer, Dominik; Tegowski, Bartosz; Albrecht, Nils Christian; Wenzel, Marvin; Kölpin, Alexander
  IEEE/MTT-S International Microwave Symposium (IMS 2023)
  Publisher DOI
• Catch Your Breath! Vital Sign Sensing With Radar
  Wenzel, Marvin; Albrecht, Nils Christian; Langer, Dominik; Heyder, Markus; Kölpin, Alexander
  IEEE Microwave Magazine 24 (3): 75-82 (2023)
  Publisher DOI
• Heart Sound Detection Using an Ultra-Wideband FMCW Radar
  Wenzel, Marvin; Kölpin, Alexander; Tegowski, Bartosz; Albrecht, Nils Christian; Langer, Dominik
  IEEE/MTT-S International Microwave Symposium (IMS 2023)
  Publisher DOI
• Accurate heart beat detection with doppler radar using bidirectional GRU network
  Lu, Hui; Heyder, Markus; Wenzel, Marvin; Albrecht, Nils Christian; Langer, Dominik; Kölpin, Alexander
  IEEE Radio and Wireless Symposium (RWS 2023)
  Publisher DOI
• Long-distance heart sound detection using 122 GHz CW radar with 3D printed high-gain antennas
  Albrecht, Nils Christian; Heyer, Markus; Wenzel, Marvin; Langer, Dominik; Lu, Hui; Kölpin, Alexander
  IEEE Radio and Wireless Symposium (RWS 2023)
  Publisher DOI