Now showing items 1-10 of 10

    • A 60 to 77 GHz switchable LNA in an RF-MEMS embedded BiCMOS technology 

      Wissenschaftlicher Artikel
      Ulusoy, Ahmet Cagri; Kaynak, Mehmet; Purtova, Tatyana; Tillack, Bernd; Schumacher, Hermann
      In this letter, a 60 to 77 GHz switchable low-noise amplifier is presented. The IC is realized in a radio frequency microelectro-mechanical systems embedded 0.25 µm SiGe-C BiCMOS technology. Measured results show that the ...
    • A biphase modulator circuit for impulse radio-UWB applications 

      Wissenschaftlicher Artikel
      Ulusoy, Ahmet Cagri; Schleicher, Bernd; Schumacher, Hermann
      This letter presents a circuit to provide binary phase shift keying to ultra-wideband (UWB) impulse transmitters. The circuit is based on a Gilbert-cell multiplier and uses active on-chip balun and unbalanced-to-balanced ...
    • A low-cost, wide-band 60 GHz down-converter module for multi-gigabit per second wireless communications 

      Beitrag zu einer Konferenz
      Liu, Gang; Trasser, Andreas; Ulusoy, Ahmet Cagri; Schumacher, Hermann
      This paper presents a low-cost down-converter module for 60 GHz short-range multi-gigabit per second wireless applications. The 60 GHz down-converter IC, con-sisting of a mixer, a VCO, a frequency doubler and a PLL, is ...
    • A SiGe frequency quadrupler for M-QAM carrier recovery 

      Beitrag zu einer Konferenz
      Ulusoy, Ahmet Cagri; Liu, Gang; Trasser, Andreas; Schumacher, Hermann
      In this paper a frequency quadrupler circuit, integrated with a commercially available SiGe HBT technology (fT/fmax = 80/90 GHz) is presented. The quadrupler consists of two Gilbert cell mixers stacked as squarers. The ...
    • 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 ...
    • Analog synchronous receiver for short-range ultra-wideband wireless communications 

      Dissertation
      Ulusoy, Ahmet Cagri
      The need for higher speed data transfer has been continuously driven by Moore´s law in the last decades. As the data storage capabilities of user-end devices improved, it became necessary to transfer the large amount of ...
    • Dual-band millimeter-wave VCO with embedded RF-MEMS switch module in BiCMOS technology 

      Beitrag zu einer Konferenz
      Kaynak, Mehmet; Purtova, Tatyana; Liu, Gang; Ulusoy, Ahmet Cagri; Tillack, Bernd; Schumacher, Hermann
      This paper presents a dual-band millimeter-wave VCO utilizing RF-MEMS switches fully integrated into a standard BiCMOS process. The switch and associated transmission line form a reconfigurable inductor in the VCO core. ...
    • Multi-Gb/s analog synchronous QPSK demodulator with phase-noise suppression 

      Wissenschaftlicher Artikel
      Ulusoy, Ahmet Cagri; Schumacher, Hermann
      In this paper, an IF quadrature phase-shift keying demodulator is presented, which performs phase and frequency synchronization in the analog domain. The presented demodulator can be utilized for short-range ultra-wideband ...
    • Packaged BiCMOS embedded RF-MEMS switches with integrated inductive loads 

      Beitrag zu einer Konferenz
      Kaynak, Mehmet; Wietstruck, M.; Zhang, W.; Drews, Jürgen; Barth, Rainer; Knoll, Dieter; Korndörfer, Falk; Scholz, René F.; Schulz, K.; Wipf, Christian; Tillack, Bernd; Kaletta, Katrin; Suchodoletz, M. von; Zoschke, Kai; Wilke, Martin; Ehrmann, Oswin; Ulusoy, Ahmet Cagri; Purtova, Tatyana; Liu, Gang; Schumacher, Hermann
      This paper presents packaged BiCMOS embedded RF-MEMS switches with integrated inductive loads for frequency tuning at mm-wave frequencies. The developed technique provides easy optimization to maximize the RF performance ...
    • RF-MEMS switch module in a 0.25 µm BiCMOS technology 

      Beitrag zu einer Konferenz
      Kaynak, Mehmet; Wietstruck, M.; Zhang, W.; Drews, Jürgen; Scholz, René F.; Knoll, Dieter; Korndörfer, Falk; Wipf, Christian; Schulz, K.; Elkhouly, M.; Kaletta, Katrin; Suchodoletz, M. von; Zoschke, Kai; Wilke, Martin; Ehrmann, Oswin; Mühlhaus, Volker; Liu, Gang; Purtova, Tatyana; Ulusoy, Ahmet Cagri; Schumacher, Hermann; et al.
      A BiCMOS embedded RF-MEMS switch module is demonstrated. The module consists of four main blocks: 1) RF-MEMS switch technology, 2) Switch models for design-kit implementation, 3) High Voltage (HV) generation and digital ...