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  • A. Talai, R. Weigel, and A. Koelpin, "Efficient radar front-end implementation in LTCC multilayer cavity technology" in IEEE/MTT-S International Microwave Symposium (IMS), 2017 (to be published). [Bibtex]
    @inproceedings{talai2017,
    author  = {Talai, Armin and Weigel, Robert and Koelpin, Alexander},
    title  = {Efficient radar front-end implementation in LTCC multilayer cavity technology},
    booktitle  = {{IEEE/MTT-S International Microwave Symposium (IMS)}},
    year  = {2017},
    month  = {06},
    day  = {06},
    location  = {Hawai'i Convention Center in Honolulu, Hawai‘i},
    publisher  = {IEEE},
    keywords  = {Multilayer,Cavity,LTCC,Antenna},
    url  = {url},
    volume  = {vol},
    number  = {no},
    note  = {accepted},
    uri  = {http://dspace.lte.eei.uni-erlangen.de/handle/123456789/1922},
    abstract  = {Low Temperature Cofired Ceramics (LTCC) is a high-frequency material type that is suitable for multilayer structures and applications. Since its relative permittivity is usually in the region of 6 to 10, microwave structures can be designed in a space-saving way. The implementation of patch-antennas on LTCC, such as radar antennas at 77 GHz, require a lower permittivity in order to achieve a desirable efficiency and focusing capability. Therefore, this presentation will focus on a novel method of using the multilayer capabilities of LTCC in order to decrease the local permittivity below the antennas. Before sintering, carbon inserts are embedded on inner layers below the antennas by using an Nd:YAG laser. It will be demonstrated that these inserts are burned out completely during sintering and the cavity remains. The process requires an adaption of the sintering profile in order to reduce the sinking of the substrate in the middle of the cavity. Within this presentation, the achievable improvements on antenna beams will be presented by comparative simulation results of 77 GHz antennas with and without the embedded cavity. Furthermore, presented measurement results will verify the effects of the cavity.},
    }
  • M. Frank, R. Weigel, and A. Koelpin, "Design of a 24 GHz Reconfigurable Transmitarray Element with Continuous Phase Range" in European Conference on Antennas and Propagation (EuCAP) 2017, 2017 (to be published). [Bibtex]
    @inproceedings{frank2017,
    author  = {Frank, Martin and Weigel, Robert and Koelpin, Alexander},
    title  = {Design of a 24 GHz Reconfigurable Transmitarray Element with Continuous Phase Range},
    booktitle  = {{European Conference on Antennas and Propagation (EuCAP) 2017}},
    year  = {2017},
    month  = {03},
    location  = {Paris, France},
    publisher  = {IEEE},
    note  = {accepted},
    uri  = {http://dspace.lte.eei.uni-erlangen.de/handle/123456789/1925},
    abstract  = {This paper presents a reconfigurable transmitarray antenna unit cell for a frequency of 24 GHz. A continuous phase range is obtained by loading patches with varactor diodes on the outer layers of a printed circuit board (PCB) while the signal couples through slots in the inner layers. The design, numerical and experimental characterization of the unit cell in a rectangular WR-42 waveguide are reported. A phase tuning range of 120° was achieved with a custom layer stack which could be extended to 145° using solely RF-substrates.},
    }
  • C. Schmidt, J. Nehring, M. Dietz, R. Weigel, D. Kissinger, and A. Hagelauer, "A 10 Gb/s Highly-Integrated Adaptive Pseudo-Noise Transmitter for Biomedical Applications" in IEEE Radio & Wireless Week 2017, 2017 (to be published). [Bibtex]
    @inproceedings{schmidt2017,
    author  = {Schmidt, Christian and Nehring, Johannes and Dietz, Marco and Weigel, Robert and Kissinger, Dietmar and Hagelauer, Amelie},
    title  = {A 10 Gb/s Highly-Integrated Adaptive Pseudo-Noise Transmitter for Biomedical Applications},
    booktitle  = {{IEEE Radio & Wireless Week 2017}},
    year  = {2017},
    month  = {01},
    day  = {17},
    location  = {Phoenix},
    note  = {accepted},
    uri  = {http://dspace.lte.eei.uni-erlangen.de/handle/123456789/1917},
    abstract  = {A highly-integrated (2\^{}11)-1 pseudo-random bit sequence (PRBS) transmitter for biomedical applications is presented. The chip consists of an ultra-wideband synthesizer with an integrated divider to drive a PLL, a linear feedback shift register (LFSR) to generate an M-sequence and a programmable binary divider to enable adaptive subsampling technique in the signal processing path. The circuit is created to be used in a miniaturized portable PRBS based sensor system for biomedical applications. A conceivable application is the measurement of dehydration in a human body. The PRBS generator is capable of generating a bit-rate up to 10 Gb/s, correlating to a maximum bandwidth of the generated sequence of 5 GHz, which is sufficient for the designated applications. The circuit is manufactured in an 0.35 um SiGe-Bipolar technology with an ft of 200 GHz using 12 mm\^{}2 chip area.},
    }
  • [DOI] F. Lurz, S. Lindner, S. Linz, S. Mann, R. Weigel, and A. Koelpin, "High-Speed Resonant Surface Acoustic Wave Instrumentation Based on Instantaneous Frequency Measurement", IEEE Transactions on Instrumentation and Measurement, pp. 1-11, 2017. [Bibtex]
    @article{lurz2017,
    author  = {Lurz, Fabian and Lindner, Stefan and Linz, Sarah and Mann, Sebastian and Weigel, Robert and Koelpin, Alexander},
    title  = {High-Speed Resonant Surface Acoustic Wave Instrumentation Based on Instantaneous Frequency Measurement},
    journal  = {{IEEE Transactions on Instrumentation and Measurement}},
    year  = {2017},
    month  = {01},
    pages  = {1--11},
    issn  = {1557-9662},
    doi  = {10.1109/TIM.2016.2642618},
    publisher  = {IEEE},
    note  = {published},
    uri  = {http://dspace.lte.eei.uni-erlangen.de/handle/123456789/1924},
    abstract  = {Surface acoustic wave (SAW) resonators are used for a broad range of wireless sensing applications, some of them having high demands on the resolution as well as the measurement update rate. This paper presents a new interrogation method for precise and fast frequency determination of passive SAW resonators based on instantaneous frequency measurement (IFM) by a low-cost Six-Port interferometer. By using a delay line, the frequency measurement is reduced to a phase measurement that can be instantaneously evaluated by the Six-Port network. No complex signal processing is necessary providing high update rates and low hardware costs. An in-depth analysis of the system concept and its building blocks is presented and the advantages as well as the limitations are discussed and compared to the current state-of-the-art. Finally, a demonstrator in the 2.4 GHz frequency band shows the feasibility and the precision of the concept with measurement times of only a few microseconds.},
    }
  • M. Haberl, B. Sanftl, M. Trautmann, R. Weigel, and A. Koelpin, "A Direct RF-to-Baseband Quadrature Subsampling Receiver Using a Low Cost ADC" in IEEE Radio and Wireless Symposium 2017, 2017 (to be published). [Bibtex]
    @inproceedings{haberl2017,
    author  = {Haberl, Matthias and Sanftl, Benedikt and Trautmann, Martin and Weigel, Robert and Koelpin, Alexander},
    title  = {A Direct RF-to-Baseband Quadrature Subsampling Receiver Using a Low Cost ADC},
    booktitle  = {{IEEE Radio and Wireless Symposium 2017}},
    year  = {2017},
    month  = {01},
    day  = {15},
    location  = {Pheonix, AZ, USA},
    publisher  = {IEEE MTT-S},
    keywords  = {ADC,I/Q signal processing,nonuniform sampling,subsampling},
    note  = {accepted},
    uri  = {http://dspace.lte.eei.uni-erlangen.de/handle/123456789/1843},
    abstract  = {This paper presents a novel receiver using direct complex subsampling. In this approach no frequency conversion is used, but therefore bandpass sampling in combination with nonuniform sampling. A special sampling pattern for the analog to digital conversion is used. The resulting sampling frequency is below the carrier frequency, like in standard bandpass sampling receivers. Therefore the requirements for the analog-digital converter (ADC) and digital signal processor (DSP) are decreased. The sample and hold stage of the ADC still has to meet the requirements for the carrier frequency. The corresponding sampling scheme and its signal processing are described. A simulation of a QPSK receiver is presented. The proposed architecture is validated using a low cost commercial-off-the-shelf (COTS) ADC along with some testing and measurements. The receiver works for the industrial, scientific and medical band (ISM) carrier frequency at 13.56 MHz, which is commonly used for short range devices like radio-frequency identification (RFID) applications.},
    }
  • M. Kloc, R. Weigel, and A. Koelpin, "SDR Implementation of an Adaptive Low-Latency IEEE 802.11p Transmitter System for Real-Time Wireless Applications" in IEEE Radio and Wireless Symposium (RWS), 2017, pp. 1-4 (to be published). [Bibtex]
    @inproceedings{kloc2017,
    author  = {Kloc, Matej and Weigel, Robert and Koelpin, Alexander},
    title  = {SDR Implementation of an Adaptive Low-Latency IEEE 802.11p Transmitter System for Real-Time Wireless Applications},
    booktitle  = {{IEEE Radio and Wireless Symposium (RWS)}},
    year  = {2017},
    month  = {01},
    pages  = {1--4},
    publisher  = {IEEE},
    note  = {accepted},
    uri  = {http://dspace.lte.eei.uni-erlangen.de/handle/123456789/1910},
    }
  • F. Pflaum, S. Erhardt, R. Weigel, and A. Koelpin, "RSSI-based Localization With Minimal Infrastructure Using Multivariate Statistic Techniques" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), 2017 (to be published). [Bibtex]
    @inproceedings{pflaum2017,
    author  = {Pflaum, Felix and Erhardt, Stefan and Weigel, Robert and Koelpin, Alexander},
    title  = {RSSI-based Localization With Minimal Infrastructure Using Multivariate Statistic Techniques},
    booktitle  = {{IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)}},
    year  = {2017},
    month  = {01},
    location  = {Phoenix, AZ, USA},
    keywords  = {wireless,wsn,lda,statistics,localization},
    note  = {accepted},
    uri  = {http://dspace.lte.eei.uni-erlangen.de/handle/123456789/1841},
    abstract  = {In this paper a new approach to localization of mobile nodes in wireless sensor networks is presented which utilizes the measurement of the received signal strength indicator by multiple receivers concentrated in a small area and applies the technique of linear discriminant analysis to the received data. The concept of gathering all receivers at a single spot provides great flexibility, while good spatial resolution is still achieved. This is demonstrated by a test network operating in the sub-GHz-range around 868 MHz.},
    }

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.


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Neueste Patente

  • F. Lurz, S. Lindner, A. Koelpin, G. Sept-Enzel, P. Dingler, and E. Halder, Elektrisches Messsystem und Betriebsverfahren hierfür, Horst Siedle GmbH & Co. KG, 2016. [Bibtex]
    @patent{lurz_patent_2016,
    author  = {Lurz, Fabian and Lindner, Stefan and Koelpin, Alexander and Sept-Enzel, Gerold and Dingler, Peter and Halder, Ernst},
    title  = {Elektrisches Messsystem und Betriebsverfahren hierfür},
    number  = {DE102016119562.6},
    address  = {Horst Siedle GmbH & Co. KG},
    nationality  = {Germany},
    booktitle  = {{}},
    year  = {2016},
    month  = {10},
    day  = {13},
    location  = {Germany},
    type  = {patent},
    uri  = {http://dspace.lte.eei.uni-erlangen.de/handle/123456789/1923},
    }
  • M. Trautmann, B. Sanftl, A. Koelpin, T. Heckel, L. Frey, S. Ditze, A. Endruschat, C. Joffe, A. Rosskopf, and T. Schriefer, System zur drahtlosen Übertragung von Energie und Daten, Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 2016. [Bibtex]
    @patent{trautmann_patent_2016,
    author  = {Trautmann, Martin and Sanftl, Benedikt and Koelpin, Alexander and Heckel, Thomas and Frey, Lothar and Ditze, Stefan and Endruschat, Achim and Joffe, Christopher and Rosskopf, Andreas and Schriefer, Thomas},
    title  = {System zur drahtlosen Übertragung von Energie und Daten},
    number  = {102016206767.2},
    address  = {Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.},
    nationality  = {Germany},
    booktitle  = {{}},
    year  = {2016},
    month  = {09},
    day  = {29},
    location  = {Germany},
    keywords  = {Inductive Power Transfer},
    type  = {patent},
    uri  = {http://dspace.lte.eei.uni-erlangen.de/handle/123456789/1913},
    abstract  = {Die Erfindung betrifft ein System zur drahtlosen Übertragung von Energie und Daten, bei dem mindestens zwei in einem Abstand zueinander angeordnete Spulen oder elektrische Leiterbahnen für die Übertragung von Energie vorhanden sind. Dabei ist jeweils mindestens eine elektrische Spule oder elektrische Leiterbahn zur Übertragung von Energie und/oder mindestens eine elektrische Spule oder elektrische Leiterbahn zur Übertragung von Daten an jeweils eine elektrische Wechselspannungsquelle angeschlossen. Dabei ist mindestens eine elektrische Wechselspannungsquelle modulierbar. Die elektrischen Spulen oder elektrischen Leiterbahnen zur Übertragung von Daten sind mit elektrischer Spannung mit einer Frequenz, die kleiner als die Frequenz mit der eine elektrische Spannung zur Übertragung von Energie mittels der elektrischen Spulen oder elektrischen Leiterbahnen zur Übertragung von Energie eingesetzt ist, betrieben.},
    }

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.


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Neueste Preise

  • M. Kloc, R. Weigel, and A. Koelpin, RTUWO'16 Best Conference Paper Award, Advances in Wireless and Optical Communications (RTUWO), 2016. [Bibtex]
    @prize{kloc_prize_2016,
    author  = {Kloc, Matej and Weigel, Robert and Koelpin, Alexander},
    title  = {RTUWO'16 Best Conference Paper Award},
    booktitle  = {{Advances in Wireless and Optical Communications (RTUWO)}},
    year  = {2016},
    month  = {11},
    location  = {Riga, Latvia},
    url  = {http://rtuwo.org/},
    type  = {prize},
    uri  = {http://dspace.lte.eei.uni-erlangen.de/handle/123456789/1921},
    }
  • S. Lindner, Förderung einer Kongressreise (Sensors 2016), Deutscher Akademischer Austauschdienst, 2016. [Bibtex]
    @prize{lindner_prize_2016,
    author  = {Lindner, Stefan},
    title  = {Förderung einer Kongressreise (Sensors 2016)},
    booktitle  = {{Deutscher Akademischer Austauschdienst}},
    year  = {2016},
    month  = {10},
    location  = {Orlando, FL, USA},
    type  = {prize},
    uri  = {http://dspace.lte.eei.uni-erlangen.de/handle/123456789/1889},
    abstract  = {Förderung einer Kongressreise anlässlich der EuMW2014 in Rom},
    }
  • F. Lurz and C. Dorn, Texas Instruments Innovation Challenge (TIIC) – Europe Design Contest - First Round Winners, Texas Instruments, 2016. [Bibtex]
    @prize{lurz_prize_2016a,
    author  = {Lurz, Fabian and Dorn, Christian},
    title  = {Texas Instruments Innovation Challenge (TIIC) – Europe Design Contest - First Round Winners},
    booktitle  = {{Texas Instruments}},
    year  = {2016},
    month  = {09},
    url  = {http://www.ti.com/ww/eu/TIIC2016/},
    type  = {prize},
    uri  = {http://dspace.lte.eei.uni-erlangen.de/handle/123456789/1918},
    abstract  = {First round winner (Top 7 in the industrial category) of the "Texas Instruments Innovation Challenge (TIIC) – Europe Design Contest" with the project entitled: "Enabling smart factories by MSP432: Virtual simultaneous sampling for industrial process monitoring".},
    }

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.


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