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Dr.-Ing. Ana Belén Amado Rey

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Dr.-Ing. Ana Belén Amado Rey´s research focuses on the development of a wearable ultrasound system that is able to continuously measure vital parameters such as blood pressure, pulse wave velocity (PWV), stiffness index, arterial distension, arterial wall thickness and blood velocity. Her research covers the main following points:

1. Characterization and analysis of piezo-elements such as Bulk PZT, CMUTs and pMUTs.

2. Development of sender/receiver circuits for the biosensors: Pulser, LNA, Power Amplifier, Mixer, Filter, DAC and high-voltage DC supply.

3. Signal digitalization and signal processing: including embedding systems such as VHDL-Programming (FPGA), Arduino and also interfaces as MatLab and LabView.

4. Application of the biosensors into ex-vivo studies.

5. Phantom fabrication.


  • 2018-now PostDoc at the Laboratory for Biomedical Microtechnology (IMTEK), Freiburg
  • 2014-2018 Ph.D. degree in Engineering (PhD thesis: Design of Integrated Power Amplifiers at milimeter-wave frequencies), Fraunhofer IAF, Freiburg
  • 2012-2014 Master degree in Telecommunications (speciality in circuit design), University of Extremadura, Cáceres, Spain. National prize from HISPASAT for the master thesis
  • 2010-2012 Master degree in Pedagogical Education in Mathematics, University of Extremadura, Badajoz, Spain
  • 2007-2010 Diploma degree in Telecommunications, University of Extremadura, Cáceres, Spain

  • Arteriosense (BMBF): Development of a non-invasive and wearable device to continuously measure the blood pressure
  • Med-UltraSys "Validation of an Ultrasound System for continuous Determination of the Arterial Diameter and Blood Flow of the Arterial Diameter and Blood Flow to Predict the Biological Vascular Age". Wissenschaftliche Gesellschaft Freiburg (07/2021-06/2022)
  • EmpSys "Entwicklung eines Empfängersystems für die kontinuierliche Messung der Dicke der Radialis-Arterie mittels Ultraschall". Wissenschaftliche Gesellschaft Freiburg (11/2019-11/2020)
  • NINUSSense "Validation of an Ultrasound System for continuous Determination of the Arterial Diameter and Blood Flow of the Arterial Diameter and Blood Flow to Predict the Biological Vascular Age". (08/2019-02/2021)
  • Circsys "Optimierung eines Teststandes zur Nachbildung des menschlichen Blutkreislaufsystems". Wissenschaftliche Gesellschaft Freiburg (07/2019-07/2020)
Supervised Thesis
  • 2019: Bachelor Thesis "Analyse und Messungen des menschlichen Blutdrucks anhand eines Models durch Relativdruck- und Ultraschallsensoren". Jan-Hendrik Helm. Albert-Ludwigs-Universität Freiburg.
  • 2021: Master Thesis "Development and characerization of a miniaturized ultrasound transceiver to measure blood pressure". Carolina Seabra (ERASMUS-Program in collaboration with Minho University, Portugal).
Five most important publications:
[1] B. Amado-Rey, C. Seabra, F.J. Becker, M. Fournelle, T. Stieglitz. “Extraction of Radial-Artery Strain and Stiffness by using Non-Invasive Ultrasound and a Low-Power Peak Detector”, IEEE Sensors Letter, July 2021.
[2] B. Amado-Rey, Y. Campos-Roca, C. Friesicke, S.Wagner, O. Ambacher, “GCPW GaAs Broadside Couplers at H-Band and Application to Balanced Power Amplifiers”, IEEE Transactions on Microwave Theory and Techniques, January 2019.
[3] B. Amado-Rey, Y. Campos-Roca, C. Friesicke, F. Van Raay, H. Massler, A. Leuther, O. Ambacher, “A G-Band Broadband Balanced Power Amplifier Module Based on Cascode mHEMTs”, IEEE Microwave and Wireless Components Letters, August 2018.
[4] B. Amado-Rey, Y. Campos-Roca, F. Van Raay, C. Friescike, S. Wagner, H. Massler, A. Leuther, O. Ambacher, “Analysis and Development of Submillimeter-Wave Stacked-FET Power Amplifier MMICs in 35-nm mHEMT Technology”, IEEE Transactions on Terahertz Science and Technology, February 2018
[5] B. Amado-Rey, Y. Campos-Roca, R. Weber, S. Maroldt, A. Tessmann, H. Massler, S. Wagner, A. Leuther, O. Ambacher, “Impact of Metallization Layer Structure on the Performance of G-Band Branch-Line Couplers”, IEEE Microwave and Wireless Components Letters. December 2015.
Dr.-Ing. Ana Belen Amado Rey
Postdoc Researcher
E-Mail: belen.amado@imtek.uni-freiburg.de
Telephone: +49 (0)761 203 7451
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