2023

• Yang, Cheng and Adam, Christian and Götschel, Sebastian
  Single-probe Near-field Phase Retrieval using On-The-Fly Scan and Hilbert Transform
  In Tagungsband "2023 International Symposium on Electromagnetic Compatibility – EMC Europe", 2023, p. 1--6
  ISSN: 2325-0364
  Abstract:
  A novel near-field measurement method is proposed for fast phase retrieval using a single probe. The method is based on a new understanding of the on-the-fly (OTF) scan process as a spatio-temporal sampling operation of near-field responses. As a result, the near-field measurement is interpreted as a signal modulation of a source signal and a variable spatio-temporal function defined by the field responses and the motion of the probe. To retrieve the complex field responses, the Hilbert Transform (HT) is utilized for envelope and phase demodulation of signals recorded by an oscilloscope. To demonstrate the proof of concept, both numerical and experimental examples are provided with a detailed description of the method implementation. Measurement-to-measurement correlations at 125 kHz are conducted using a six-axis industry robot with multiple probes and instruments, showing its efficiency, effectiveness, and flexibility. Compared to conventional near-field measurement methods, the proposed method allows 90% reduction of measurement time and achieves a relative accuracy of phase retrieval above 96% with a simplified measurement setup, opening up new opportunities for near-field measurement applications.
  BibTeX:
  @inproceedings{yang_single-probe_2023,
  author = {Yang and Cheng and Adam and Christian and G{\"o}tschel and Sebastian},
  title = {{S}ingle-probe {N}ear-field {P}hase {R}etrieval using {O}n-{T}he-{F}ly {S}can and {H}ilbert {T}ransform},
  year = {2023},
  month = {09},
  booktitle = {2023 International Symposium on Electromagnetic Compatibility – EMC Europe},
  note = {ISSN: 2325-0364},
  pages = {1--6} }
  [Abstract] [BibTeX] [DOI]
  
  
• Singer, Julian A. and Stramm, Till and Fasel, Jens and Schween, Oliver and Gelaeschus, Anton and Bahr, Andreas and Kuhl, Matthias
  Flexible Polymer Optical Waveguides for Integrated Optogenetic Brain Implants
  In Tagungsband "2023 IEEE 36th International Conference on Micro Electro Mechanical Systems Conference (MEMS)", 2023
  2023 IEEE 36th International Conference on Micro Electro Mechanical Systems Conference (MEMS)
  Abstract:
  This paper presents a manufacturing process for flexible optical waveguides made of biocompatible polydimethylsiloxane (PDMS) to be attached to future optogenetic implants. Based on a complementary metal-oxide-semiconductor (CMOS) application-specific integrated circuit (ASIC), the system uses integrated single photon avalanche diodes (SPADs) as sensors for fluorescence imaging (FI) and post-CMOS micro light-emitting diodes (µLEDs) for stimulation [1]. Attaching fibers to SPADs and µLEDs to collect and distribute light from and to deeper brain layers can unfold previously unachieved medical applications. Two technologies for biocompatible waveguide manufacturing are presented: thin-film and molding. Such a combination of integrated bidirectional implantable ASICs with custom waveguide manufacturing is not limited to medical scenarios but opens up a broad field of applications.
  BibTeX:
  @inproceedings{mems23singer,
  author = {Singer and Julian A. and Stramm and Till and Fasel and Jens and Schween and Oliver and Gelaeschus and Anton and Bahr and Andreas and Kuhl and Matthias},
  title = {{F}lexible {P}olymer {O}ptical {W}aveguides for {I}ntegrated {O}ptogenetic {B}rain {I}mplants},
  year = {2023},
  booktitle = {2023 IEEE 36th International Conference on Micro Electro Mechanical Systems Conference (MEMS)},
  note = {2023 IEEE 36th International Conference on Micro Electro Mechanical Systems Conference (MEMS)} }
  [Abstract] [BibTeX]
  
  
• Kim Allinger, Matthias Kuhl
  A closed-loop 12bit CMOS-integrated stress sensor system with 4bit adjustable sensitivity from 178-11kPa/LSB at up to 22.5kSa/s and 5bit dynamic range adjustment
  In Tagungsband "2023 IEEE International Solid-State Circuits Conference (ISSCC)", 2023
  February 19-23, 2023 San Francisco, CA
  Abstract:
  
  BibTeX:
  @inproceedings{Kim_ISSCC_2023,
  author = {Kim Allinger and Matthias Kuhl},
  title = {{A} closed-loop 12bit {C}{M}{O}{S}-integrated stress sensor system with 4bit adjustable sensitivity from 178-11k{P}a/{L}{S}{B} at up to 22.5k{S}a/s and 5bit dynamic range adjustment},
  year = {2023},
  booktitle = {2023 IEEE International Solid-State Circuits Conference (ISSCC)},
  note = {February 19-23, 2023 San Francisco, CA} }
  [BibTeX]
  
  
• Mohammad Sadeghi, Eric Elzenheimer, Henrik Wolframm, Johan Arbustini, Angeles De la Cruz-García, Christine Selhuber-Unkel, Andreas Bahr, Michael Höft, Gerhard Schmidt, Franz Faupel
  Quantitative Evaluation of Magnetic Nanoparticles for Bio-imaging by Magnetoelectric Thin-Film Sensor
  In Tagungsband "57th DGBMT Annual Conference on Biomedical Engineering", 2023
  26.-28.09.2023, Duisburg, Germany (accepted)
  Abstract:
  
  BibTeX:
  @inproceedings{Bahr2023,
  author = {Mohammad Sadeghi and Eric Elzenheimer and Henrik Wolframm and Johan Arbustini and Angeles De la Cruz-García and Christine Selhuber-Unkel and Andreas Bahr and Michael H{\"o}ft and Gerhard Schmidt and Franz Faupel},
  title = {{Q}uantitative {E}valuation of {M}agnetic {N}anoparticles for {B}io-imaging by {M}agnetoelectric {T}hin-{F}ilm {S}ensor},
  year = {2023},
  booktitle = {57th DGBMT Annual Conference on Biomedical Engineering},
  note = {26.-28.09.2023, Duisburg, Germany (accepted)} }
  [BibTeX]
  
  
• MD Wasif Absar, Anton Gelaeschus, Julian Singer, Andreas Bahr
  Ultra-Low Frequency Digital Controlled Oscillator using CMOS Thyristor Based Delay Elements
  In Tagungsband "Analog Workshop 2023", 2023
  Analog Workshop, München, 2023
  Abstract:
  
  BibTeX:
  @inproceedings{Paper:Absar:2023,
  author = {MD Wasif Absar and Anton Gelaeschus and Julian Singer and Andreas Bahr},
  title = {{U}ltra-{L}ow {F}requency {D}igital {C}ontrolled {O}scillator using {C}{M}{O}{S} {T}hyristor {B}ased {D}elay {E}lements},
  year = {2023},
  booktitle = {Analog Workshop 2023},
  note = {Analog Workshop, M{\"u}nchen, 2023} }
  [BibTeX]
  
  

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