Now showing items 1-14 of 14

    • 24 and 36 GHz SiGe HBT power amplifiers 

      Beitrag zu einer Konferenz
      Chartier, Sébastien; Sönmez, Ertugrul; Schumacher, Hermann
      We present in this paper two amplifiers using the SiGe HBT technology, operating at 24 GHz and 36 GHz, respectively. The first amplifier was designed to operate in the 24 GHz ISM band, especially for traffic and automotive ...
    • 79 GHz fully integrated fully differential Si/SiGe HBT amplifier for automotive radar applications 

      Beitrag zu einer Konferenz
      Chartier, Sébastien; Schleicher, Bernd; Feger, Till; Purtova, Tatyana; Schumacher, Hermann
      In this work, the authors present a fully integrated, fully differential amplifier operating at 79 GHz using a highspeed Si/SiGe hetero-bipolar technology. This amplifier needs a single supply voltage and shows high ...
    • A compact low-power SiGe:C BiCMOS amplifier for 77-81 GHz automotive radar 

      Beitrag zu einer Konferenz
      Schleicher, Bernd; Chartier, Sébastien; Fischer, Gerhard; Korndörfer, Falk; Borngräber, Johannes; Feger, Till; Schumacher, Hermann
      In this paper a single-ended fully integrated Si/SiGe HBT amplifier working at a center frequency of 79 GHz is presented. The amplifier consists of three cascode stages. A trimmable line technique and an efficient DC ...
    • A fully integrated fully differential low-noise amplifier for short range automotive radar using a SiGe:C BiCMOS technology 

      Beitrag zu einer Konferenz
      Chartier, Sébastien; Schleicher, Bernd; Korndörfer, Falk; Glisic, Srdjan; Fischer, Gerhard; Schumacher, Hermann
      A fully integrated fully differential low-noise amplifier for 79 GHz short range radar applications using a high-speed SiGe:C BiCMOS technology is presented. The integrated circuit uses thin-film microstrip lines and ...
    • A PLL with ultra low phase noise for millimeter wave applications 

      Beitrag zu einer Konferenz
      Gai, Xiaolei; Liu, Gang; Chartier, Sébastien; Trasser, Andreas; Schumacher, Hermann
      An ultra low noise phase locked loop (PLL) for millimeter wave applications is presented. The complete design includes a mixer type phase detector, a divide-by-32 frequency divider, a VCO and an off-chip active low pass ...
    • Analog synchronous receiver for multi-gigabit wireless communications 

      Beitrag zu einer Konferenz
      Ulusoy, Ahmet Cagri; Liu, Gang; Trasser, Andreas; Chartier, Sébastien; Schumacher, Hermann
      In this work, we present a synchronous receiver architecture utilizing analog carrier recovery, to be used in multi-gigabit wireless communication systems. Carrier phase and frequency synchronization in the analog receiver ...
    • Fully integrated millimeter-wave VCO with 32 % tuning range 

      Beitrag zu einer Konferenz
      Liu, Gang; Chartier, Sébastien; Trasser, Andreas; Schumacher, Hermann
      In this paper, the authors present a fully integrated VCO with 32 % tuning range centered at 38.9 GHz. The VCO was designed using a commercially available, inexpensive 0.8 µm Si/SiGe HBT technology with fT and fmax of 80 ...
    • Highly compact 3.1 - 10.6 GHz UWB LNA in SiGe HBT technology 

      Beitrag zu einer Konferenz
      Dederer, Jochen; Chartier, Sébastien; Feger, Till; Spitzberg, Ursula; Trasser, Andreas; Schumacher, Hermann
      We present the design, implementation and measurement of a low noise amplifier (LNA) in a low cost 0.8 mym SiGe hetero-junction bipolar technology (HBT). The measured noise figure is between 2.1 dB and 2.6 dB in the ...
    • Millimeter-wave amplifiers using a 0.8 µm Si/SiGe HBT technology 

      Beitrag zu einer Konferenz
      Chartier, Sébastien; Sönmez, Ertugrul; Schumacher, Hermann
      The authors present three amplifiers, operating at 36, 40 and 50 GHz implemented in a low-cost 0.8 um Si/SiGe HBT technology which features an fT and fMAX of 80 GHz. Each amplifier shows a high gain, a high isolation and ...
    • Millimeter-wave Si/SiGe HBT frequency divider using dynamic and static division stages 

      Beitrag zu einer Konferenz
      Chartier, Sébastien; Sönmez, Ertugrul; Dederer, Jochen; Schleicher, Bernd; Schumacher, Hermann
      In this paper, the authors present a fully integrated frequency divider with a divide ratio of 32, using a 0.8 um Si/SiGe HBT technology. The divider operates at least up to 40 GHz and shows outstanding performance such ...
    • Monolithic integration of a folded dipole antenna with a 24-GHz receiver in SiGe HBT technology 

      Wissenschaftlicher Artikel
      Öjefors, Erik; Sönmez, Ertugrul; Chartier, Sébastien; Lindberg, Peter; Schick, Christoph; Rydberg, Anders; Schumacher, Hermann
      The integration of an on-chip folded dipole antenna with a monolithic 24-GHz receiver manufactured in a 0.8-µm SiGe HBT process is presented. A high-resistivity silicon substrate (1000 cm) is used for the implemented circuit ...
    • SiGe HBT ICs with high operational to transit frequency ratio: design and design re-use 

      Dissertation
      Chartier, Sébastien
      The recent significant performance improvement of SiGe Heterojunction Bipolar Transistors has opened the way to the millimeter-wave domain. In the future, this will allow the development of new exciting consumer-oriented ...
    • SiGe millimeter-wave dynamic frequency divider with enhanced sensitivity incorporating a transimpedance stage 

      Beitrag zu einer Konferenz
      Chartier, Sébastien; Liu, Liu; Fischer, Gerhard; Glisic, Srdjan; Höhnemann, Holger; Trasser, Andreas; Schumacher, Hermann
      A Si/SiGe bipolar dynamic frequency divider designed for 77 GHz/79 GHz automotive radar is presented, which uses a transimpedance amplifier topology to improve sensitivity and operational bandwidth. Capable of operation ...
    • Towards a highly flexible spectrum sensing platform for cognitive radio networks 

      Beitrag zu einer Konferenz
      Lohmiller, Peter; Elsokary, Ahmed; Valenta, Václav; Gai, Xiaolei; Trasser, Andreas; Schumacher, Hermann; Chartier, Sébastien
      Multi-nodal spectrum sensing is a promising approach to robust cognitive radio networks, which provides increased adaptability to database-anchored sharing approaches. Yet its commercially viable implementation requires ...