Now showing items 1-20 of 369

    • 140-GHz finline components 

      Wissenschaftlicher Artikel
      Menzel, Wolfgang; Callsen, Heinrich
      N/A
    • 160-GHz radar proximity sensor with distributed and flexible antennas for collaborative robots 

      Wissenschaftlicher Artikel
      Geiger, Martin; Waldschmidt, Christian (Universität Ulm, 2019-01-09)
      There is a growing demand for collaborative robots in order to improve the efficiency of industrial processes and to push Industry 4.0 forward. The challenge for these robots is the compliance of the safety regulations to ...
    • 24 and 36 GHz SiGe HBT power amplifiers 

      Konferenzveröffentlichung
      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 ...
    • 3-dimensional chip integration: technology and critical issues 

      Dissertation
      Benkart, Peter
      The increasing integration density in monolithic circuit fabrication leads to a wiring problem. A solution offers the use of 3-dimensional chip integration with through chip vias. In this case, several highly interconnected ...
    • 33 - 43 GHz and 66 - 86 GHz VCO with high output power in an 80 GHz fT SiGe HBT technology 

      Konferenzveröffentlichung
      Liu, Gang; Trasser, Andreas; Schumacher, Hermann
      This letter presents a signal generation circuit that combines a wide tuning range voltage controlled oscillator (VCO) and a frequency doubler. The VCO provides two differential outputs with different power levels. A ...
    • 40 GHz microstrip array antenna 

      Konferenzveröffentlichung
      Menzel, Wolfgang
      N/A
    • 47 - 77 GHz and 70 - 155 GHz LNAs in SiGe BiCMOS technologies 

      Konferenzveröffentlichung
      Liu, Gang; Schumacher, Hermann
      This paper presents two broadband LNAs covering the frequency ranges from 47 to 77 GHz and 73 to 140 GHz, with peak gain above 20 dB. A proposed T-type matching topology has been adopted in both circuits to achieve the ...
    • 77 GHz radar-based altimeter for unmanned aerial vehicles 

      Beitrag zu einer Konferenz
      Hügler, Philipp; Geiger, Martin; Waldschmidt, Christian (Universität Ulm, 2018)
      For multi-copter unmanned aerial vehicles (UAVs) sensing of the actual altitude is an important task. Many functions providing increased flight safety and easy maneuverability rely on altitude data. Commonly used sensors ...
    • 79 GHz fully integrated fully differential Si/SiGe HBT amplifier for automotive radar applications 

      Konferenzveröffentlichung
      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 160-GHz radar with flexible antenna used as a sniffer probe 

      Wissenschaftlicher Artikel
      Geiger, Martin; Hitzler, Martin; Saulig, Stefan; Iberle, Johannes; Hügler, Philipp; Waldschmidt, Christian (Universität Ulm, 2017-06)
      In radar measurements the observed area is limited by the antenna beamwidth and due to the usually fixed transceiver position, only unhidden targets in a small observation area can be detected. Furthermore, bulky lens ...
    • A 60 GHz, multi-Gbps down-converter IC in an 80 GHz fT SiGe technology 

      Dissertation
      Liu, Gang
      This dissertation describes the design and characterization of low-cost 60 GHz down-converter ICs and modules for short-range multi-gigabit per second wireless communications. Low-cost semiconductor technology and packaging ...
    • 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 61 GHz Doppler radar using inverted strip dielectric waveguide 

      Konferenzveröffentlichung
      Li, Zong-Wen; Menzel, Wolfgang
      N/A
    • A 64 to 81 GHz PLL with low phase noise in an 80 GHz SiGe HBT technology 

      Konferenzveröffentlichung
      Liu, Gang; Trasser, Andreas; Schumacher, Hermann
      This paper presents a 64 to 81 GHz PLL realized in a low-cost, 80 GHz HBT technology. The circuit consists of a wide tuning range VCO, a push-push frequency doubler and an analog PLL (divide by 32 frequency divider, phase ...
    • A 64-84-GHz PLL with low phase noise in an 80 GHz SiGe HBT technology 

      Konferenzveröffentlichung
      Liu, Gang; Trasser, Andreas; Schumacher, Hermann
      This paper presents a 64-84 GHz phase-locked loop (PLL) realized in a low-cost 80-GHz HBT technology. The circuit consists of a wide tuning-range voltage-controlled oscillator, a push-push frequency doubler, a divide-by-32 ...
    • A 77 GHz FM/CW radar frontend with a low-profile, low-loss printed antenna 

      Konferenzveröffentlichung
      Menzel, Wolfgang; Pilz, Dietmar; Leberer, Ralf
      N/A
    • A 77-GHz cavity antenna array in PCB technology 

      Beitrag zu einer Konferenz
      Vasanelli, Claudia; Ruess, Tobias; Waldschmidt, Christian (Universität Ulm, 2016-01-11)
      In this paper the design and the implementation of a cavity antenna array in PCB technology for automotive radar applications is presented. The array consists of four cavity antennas fed by a microstrip-line feeding network ...
    • A 77-GHz FM/CM radar front-end with a low-profile low-loss printed antenna 

      Wissenschaftlicher Artikel
      Menzel, Wolfgang; Pilz, Dietmar; Leberer, Ralf
      N/A
    • A biphase modulator circuit for impulse radio-UWB applications 

      Konferenzveröffentlichung
      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 compact low-power SiGe:C BiCMOS amplifier for 77-81 GHz automotive radar 

      Konferenzveröffentlichung
      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 ...