Mitarbeiter

M. Sc. Florian Trenz

Kontakt

Preise & Auszeichnungen

  • F. Trenz, Förderung einer Kongressreise, Deutscher Akademischer Austauschdienst, 2017. [Bibtex]
    @prize{trenz_prize_2017,
    abstract = {Conference attendance RFIC 2017},
    author = {Trenz, Florian},
    booktitle = {Deutscher Akademischer Austauschdienst},
    cris = {trenz_prize_2017},
    year = {2017},
    title = {Förderung einer Kongressreise},
    type = {20773-Kleiner Preis},
    }

COPYRIGHT NOTICE: Copyright and all rights of the material above are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by the appropriate copyright. The material may not be reposted without the explicit permission of the copyright holder.

COPYRIGHT NOTICE FOR IEEE PUBLICATIONS: © IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

COPYRIGHT NOTICE FOR EUMA PUBLICATIONS: © EUMA. Personal use of this material is permitted. Permission from European Microwave Association(EUMA) must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Publikationen

2018

  • F. Trenz, R. Weigel, and A. Hagelauer, "Methods for Human Dehydration Measurement", Frequenz, vol. 72, iss. 3-4, pp. 159-166, 2018. [DOI] [Bibtex]
    @article{trenz2018,
    abstract = {The aim of this article is to give a broad overview of current methods for the identification and quantific- ation of the human dehydration level. Starting off from most common clinical setups, including vital parameters and general patients’ appearance, more quantifiable res- ults from chemical laboratory and electromagnetic meas- urement methods will be reviewed. Different analysis methods throughout the electromagnetic spectrum, ran- ging from direct current (DC) conductivity measurements up to neutron activation analysis (NAA), are discussed on the base of published results. Finally, promising techno- logies, which allow for an integration of a dehydration assessment system in a compact and portable way, will be spotted.},
    author = {Trenz, Florian and Weigel, Robert and Hagelauer, Amelie},
    cris = {https://cris.fau.de/converis/publicweb/publication/106922024},
    year = {2018},
    month = {03},
    day = {07},
    doi = {10.1515/FREQ-2018-0006},
    faupublication = {yes},
    issn = {0016-1136},
    journaltitle = {Frequenz},
    keywords = {hydration,dehydration,physiology,measurement,total body water,body composition},
    number = {3-4},
    pages = {159--166},
    peerreviewed = {Yes},
    shortjournal = {FREQUENZ},
    title = {Methods for Human Dehydration Measurement},
    type = {Review article},
    volume = {72},
    }

2017

  • F. Trenz, R. Weigel, and D. Kissinger, "Validation of a Functional Principle for a Broadband Millimeter-Wave Power Detection Structure in a Recent BiCMOS Technology" in IEEE Radio Frequency Integrated Circuits Symposium, Honolulu, Hawaii, USA, 2017. [Bibtex]
    @inproceedings{trenz2017,
    abstract = {In this paper, a functional principle for a broadband thermal detector suited for a monolithical integration is shown. Two tantalum load resistors are heated by an input signal, while the temperature at a fixed distance is recorded on chip with a differential temperature sensing bridge. An integrated differential to single-ended stage amplifies the bridges differential voltage and makes an output voltage proportional to the input power of the detector available. The thermal resistance and capacitance between the load resistor and the sensing cell act as a low pass filter in the electrical regime. Based on this concept, a detector chip has been designed, which has been analyzed in thermal simulations. The realized detector has been characterized on-chip and bonded to a microwave substrate for a system performance estimation. Its input impedance is tuned to 50 Ohms and measured matching is better than -15dB from 10MHz to 43.5GHz. With a low supply voltage of 1.5V and its active area of around 80x36um2, the detector is suitable for an integrated power measurement solution.},
    author = {Trenz, Florian and Weigel, Robert and Kissinger, Dietmar},
    language = {English},
    publisher = {IEEE},
    booktitle = {IEEE Radio Frequency Integrated Circuits Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/121940984},
    year = {2017},
    month = {06},
    day = {04},
    eventdate = {2017-06-04/2017-06-06},
    faupublication = {yes},
    keywords = {Detectors;Envelope detectors;Monolithic integrated circuits;BiCMOS integrated circuits;Thermodynamics},
    peerreviewed = {Yes},
    title = {Validation of a Functional Principle for a Broadband Millimeter-Wave Power Detection Structure in a Recent BiCMOS Technology},
    type = {Konferenzschrift},
    venue = {Honolulu, Hawaii, USA},
    }

2016

  • M. Dietz, C. Schmidt, F. Trenz, J. Nehring, A. Hagelauer, R. Weigel, and D. Kissinger, "Dehydratations-Erkennung im Alltag durch integrierte nicht-invasive Sensorik" in Medizin Innovativ - MedTech Summit 2016, Nürnberg, 2016. [Bibtex]
    @inproceedings{dietz2016,
    abstract = {Veränderungen im menschlichen Wasserhaushalt führen zur Verminderung der Leistungsfähigkeit im Alltag bis hin zu lebensbedrohlichen Situationen. Insbesondere hier ist eine Überwachung des menschlichen Wasserhaushaltes wichtig. Ein neuer Ansatz schafft die Möglichkeit, Nutzern auch im Alltag die aktive Überwachung ihres Hydratationszustandes zu ermöglichen. Das Verfahren beruht auf Sensorik, die als Stimulus eine elektromagnetische Welle verwendet. Aus der vom Gewebe reflektierten Welle können Rückschlüsse auf die Wasserkonzentration gezogen werden. So wird ein alltagstaugliches und hochintegriertes Detektionssystem möglich, welches vom Nutzer permanent getragen werden kann und die Analyse des Wasserhaushaltes erlaubt.},
    author = {Dietz, Marco and Schmidt, Christian and Trenz, Florian and Nehring, Johannes and Hagelauer, Amelie and Weigel, Robert and Kissinger, Dietmar},
    booktitle = {Medizin Innovativ - MedTech Summit 2016},
    cris = {https://cris.fau.de/converis/publicweb/publication/108120584},
    year = {2016},
    month = {06},
    faupublication = {yes},
    keywords = {Dehydratation; nicht-invasive Sensorik; Gesundheitsförderung; integrierte Diagnostik},
    peerreviewed = {No},
    title = {Dehydratations-Erkennung im Alltag durch integrierte nicht-invasive Sensorik},
    venue = {Nürnberg},
    }
  • F. Trenz, R. Weigel, and D. Kissinger, "Evaluation of a Reflection Based Dehydration Sensing Method for Wristwatch Integration" in MIKON 2016 - International Conference on Microwave, Radar and Wireless Communications, Krakow, Poland, 2016. [DOI] [Bibtex]
    @inproceedings{trenz2016,
    abstract = {This paper presents a compact dehydration measurement method, keeping in mind a system integration in a wristwatch housing. In contrast to the conventional measurement approach using two measurement antennas, the proposed measurement setup uses only one antenna and one metallic reflector. Measurements have been performed using a patch antenna immersed in a steel basin filled with a tissue-equivalent liquid. The microstrip antenna has been optimized for an application in the 2.45GHz ISM band and features a biocompatible passivation layer and a rigid aluminum housing. The tissue-equivalent liquid mimicks dielectric tissue properties over a hypotonic hydration change. The steel basin acts as a liquid retainer and as a metallic reflector for the measurement setup. Measurements with the proposed setup have shown, that a clear distinction of physiologically relevant hydration levels is possible.},
    author = {Trenz, Florian and Weigel, Robert and Kissinger, Dietmar},
    publisher = {IEEE},
    booktitle = {MIKON 2016 - International Conference on Microwave, Radar and Wireless Communications},
    cris = {https://cris.fau.de/converis/publicweb/publication/108094404},
    year = {2016},
    month = {05},
    day = {09},
    doi = {10.1109/MIKON.2016.7491935},
    eventdate = {2016-05-09/2016-05-09},
    eventtitle = {21st International Conference on Microwaves, Radar and Wireless Communications (MIKON)},
    faupublication = {yes},
    keywords = {Biomedical measurement; Microwave sensors; Biosensors; Reflectometry},
    peerreviewed = {Yes},
    title = {Evaluation of a Reflection Based Dehydration Sensing Method for Wristwatch Integration},
    type = {Konferenzschrift},
    venue = {Krakow, Poland},
    volume = {21},
    }

2015

  • C. Schmidt, M. Dietz, F. Trenz, J. Nehring, R. Weigel, and D. Kissinger, "Miniaturisierte Dehydratations-Sensorik im Leistungssport" in Fußball 4.0 - Jahrestagung der dvs-Kommission Fußball, Erlangen, 2015. [Bibtex]
    @inproceedings{schmidt2015,
    author = {Schmidt, Christian and Dietz, Marco and Trenz, Florian and Nehring, Johannes and Weigel, Robert and Kissinger, Dietmar},
    booktitle = {Fußball 4.0 - Jahrestagung der dvs-Kommission Fußball},
    cris = {https://cris.fau.de/converis/publicweb/publication/120743084},
    year = {2015},
    month = {11},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Miniaturisierte Dehydratations-Sensorik im Leistungssport},
    venue = {Erlangen},
    }
  • F. Trenz, M. Hofmann, R. Weigel, and D. Kissinger, "A Broadband 3-29 GHz Reflectometer with a Frequency Compensated Multilayer Sixport Structure" in 2015 European Microwave Week, Paris, France, 2015. [DOI] [Bibtex]
    @inproceedings{trenz2015,
    abstract = {In this paper, a planar broadband sixport reflectometer structure is presented. A frequency range from 3 to 29 GHz could be achieved by merging broadband components into a single multilayer pcb stackup with an area of 66x55 mm2 . The reflectometric architecture used herein allows a frequency independent q-point configuration of the sixport by implementing microstrip linelength compensation. Broadband matching of around -10 dB could be reached at all ports in a frequency range from 1 to 30 GHz. Acceptable coupling from DUT port to measurement output could be reached in a range from 2 to 29 GHz. Frequency compensation of the structure and an optimal q-point constellation of 120-120-120 have been verified by measurement. Due to its broadband functionality, compactness and cost efficiency, the proposed system is suitable for a wide range of microwave measurement applications.},
    author = {Trenz, Florian and Hofmann, Maximilian and Weigel, Robert and Kissinger, Dietmar},
    publisher = {IEEE},
    booktitle = {2015 European Microwave Week},
    cris = {https://cris.fau.de/converis/publicweb/publication/124142524},
    year = {2015},
    month = {09},
    day = {06},
    doi = {10.1109/EUMC.2015.7345765},
    eventdate = {2015-09-06/2015-09-11},
    eventtitle = {The European Microwave Conference},
    faupublication = {yes},
    keywords = {Reflectometry; sixport; Microwave circuits; broadband},
    peerreviewed = {Yes},
    title = {A Broadband 3-29 GHz Reflectometer with a Frequency Compensated Multilayer Sixport Structure},
    type = {Konferenzschrift},
    venue = {Paris, France},
    }
  • F. Trenz, V. Kalpen, R. Weigel, and D. Kissinger, "Modeling and Measurement of a Tissue-Equivalent Liquid for Noninvasive Dehydration Sensing in the 2.45 GHz ISM-Band" in IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications(IMWS-Bio 2015), Taipei, Taiwan, 2015. [DOI] [Bibtex]
    @inproceedings{trenz2015a,
    abstract = {In this paper, a blood-equivalent liquid is presented. The phantom material at room temperature is a valid representation of blood at body temperature in the frequency range from 2 to 3 GHz with an maximum deviation of ±1.5 in eps1 and ±2.8 in eps2 . The effect of a hypertonic variation of the plasma hydration level has been modeled by varying the amount of water ±14 % in the tissue-equivalent fluid. Transmission based measurements have been performed on a tube phantom of PMMA with narrowband patch antennas on flexible substrates. The antennas have been placed at opposite sides of the phantom and measurements have been performed at different hydration levels of the substitute liquid. A clear distinction of the levels can be seen in both magnitude and phase of the transmission coefficient.},
    author = {Trenz, Florian and Kalpen, Victoria and Weigel, Robert and Kissinger, Dietmar},
    language = {English},
    booktitle = {IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications(IMWS-Bio 2015)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122812404},
    year = {2015},
    month = {09},
    day = {21},
    doi = {10.1109/IMWS-BIO.2015.7303761},
    eventdate = {2015-09-21/2015-09-23},
    eventtitle = {IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications},
    faupublication = {yes},
    keywords = {Biomedical measurement; Biomedical monitoring; Biological system modeling; Microwave sensors; Biosensors; Phantoms},
    peerreviewed = {Yes},
    title = {Modeling and Measurement of a Tissue-Equivalent Liquid for Noninvasive Dehydration Sensing in the 2.45 GHz ISM-Band},
    type = {Konferenzschrift},
    venue = {Taipei, Taiwan},
    }

2014

  • F. Trenz, M. Hofmann, R. Weigel, G. Fischer, and D. Kissinger, "Compact 2-28 GHz Planar Multi-Octave Bandwidth Wilkinson Power Dividers" in 2014 IEEE MTT-S International Microwave Symposium (IMS), Tampa, Florida, USA, 2014, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{trenz2014,
    abstract = {In this paper, two broadband Wilkinson power dividers in microstrip technology are presented. A broadband operation from 2 to 28 GHz could be achieved by a multisectional layout. The dividers differ in the number of cascaded steps, which allows application dependent usage. Furthermore, the dividers make use of commercially available, surface mounted thinfilmresistors, allowing a straightforward implementation. The maximum occupied area is around 30mm2 for the longer version and around 16mm2 for the shorter version. Measurements show a matching better than 13 dB and an isolation of better than 10 dB over the whole frequency range. The achieved bandwidth ratio of 14:1 represents, in combination with the compact layout, the highest ratio for Wilkinson dividers published so far.},
    author = {Trenz, Florian and Hofmann, Maximilian and Weigel, Robert and Fischer, Georg and Kissinger, Dietmar},
    language = {English},
    publisher = {IEEE},
    booktitle = {2014 IEEE MTT-S International Microwave Symposium (IMS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108031924},
    year = {2014},
    month = {06},
    day = {01},
    doi = {10.1109/MWSYM.2014.6848660},
    eventdate = {2014-06-01/2014-06-06},
    eventtitle = {IEEE MTT-S International Microwave Symposium},
    faupublication = {yes},
    keywords = {Wilkinson power divider; broadband},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {Compact 2-28 GHz Planar Multi-Octave Bandwidth Wilkinson Power Dividers},
    type = {Konferenzschrift},
    venue = {Tampa, Florida, USA},
    }

2012

  • M. Hofmann, F. Trenz, R. Weigel, G. Fischer, and D. Kissinger, "A Microwave Sensing System for Aqueous Concentration Measurements based on a Microwave Reflectometer" in 2012 IEEE MTT-S International Microwave Symposium Digest (MTT), Montreal, Canada, 2012. [DOI] [Bibtex]
    @inproceedings{hofmann2012c,
    abstract = {This paper presents a novel parameterized Debye relaxation model for aqueous glucose solutions up to 40 GHz. The influence on all Debye relaxation parameters is given by three equations. A compact microwave demon- strator for concentration measurements, consisting of two directional couplers, a voltage controlled oscillator (VCO), a six-port-junction, power detectors and a signal processing board is introduced. A hybrid calibration procedure for the reflectometer based approach is applied, based on a linear five standard calibration and a three standard error-box model, respectively.},
    author = {Hofmann, Maximilian and Trenz, Florian and Weigel, Robert and Fischer, Georg and Kissinger, Dietmar},
    language = {English},
    publisher = {IEEE},
    booktitle = {2012 IEEE MTT-S International Microwave Symposium Digest (MTT)},
    cris = {https://cris.fau.de/converis/publicweb/publication/107159624},
    year = {2012},
    month = {08},
    day = {17},
    doi = {10.1109/MWSYM.2012.6259771},
    eventdate = {2012-06-17/2012-06-22},
    eventtitle = {IEEE International Microwave Symposium},
    faupublication = {yes},
    isbn = {9781467310864},
    issn = {0149-645X},
    keywords = {Diabetes;Electromagnetic reflection;Relaxation methods},
    peerreviewed = {Yes},
    title = {A Microwave Sensing System for Aqueous Concentration Measurements based on a Microwave Reflectometer},
    type = {Konferenzschrift},
    venue = {Montreal, Canada},
    }

COPYRIGHT NOTICE: Copyright and all rights of the material above are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by the appropriate copyright. The material may not be reposted without the explicit permission of the copyright holder.

COPYRIGHT NOTICE FOR IEEE PUBLICATIONS: © IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

COPYRIGHT NOTICE FOR EUMA PUBLICATIONS: © EUMA. Personal use of this material is permitted. Permission from European Microwave Association(EUMA) must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.