Arpad L. Scholtz
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View article: A UHF/UWB hybrid silicon RFID tag with on–chip antennas
A UHF/UWB hybrid silicon RFID tag with on–chip antennas Open
In this contribution, we describe and analyse a miniature wireless radio frequency identification (RFID) chip with on-chip antennas (OCA) and ultra wideband (UWB) signalling by real-world measurements. With the on-chip antenna approach, no…
View article: <i>BRITE-Constellation</i>: Nanosatellites for precision photometry of bright stars
<i>BRITE-Constellation</i>: Nanosatellites for precision photometry of bright stars Open
BRITE-Constellation (where BRITE stands for BRI ght T arget E xplorer) is an international nanosatellite mission to monitor photometrically, in two colours, brightness and temperature variations of stars brighter than V ≈ 4, with precision…
View article: A search for p-modes and other variability in the binary system 85 Pegasi using MOST photometry
A search for p-modes and other variability in the binary system 85 Pegasi using MOST photometry Open
Context: Asteroseismology has great potential for the study of metal-poor\nstars due to its sensitivity to determine stellar ages. Aims: Our goal was to\ndetect p-mode oscillations in the metal-poor sub-dwarf 85 Peg A and to search\nfor ot…
View article: Vienna MIMO Testbed
Vienna MIMO Testbed Open
While the field of MIMO transmission has been explored over the past decade mainly theoretically, relatively few results exist on how these transmissions perform over realistic, imperfect channels. The reason for this is that measurement e…
View article: Performance and reliability evaluation of the s-band vienna satellite ground station.
Performance and reliability evaluation of the s-band vienna satellite ground station. Open
Headsets are increasingly used in the working environment. In addition to being frequently used by call-centre staff, they are also becoming more popular with remote workers and teleconference participants. The aim of this work was to desc…
View article: Prospects of Microstrip Waveguides in Aluminum and Copper Metallization for High-Frequency Applications
Prospects of Microstrip Waveguides in Aluminum and Copper Metallization for High-Frequency Applications Open
An electrical characterization of the high-frequency behavior of monolithically integrated microstrip waveguides and a grounded coplanar line is presented. Microstrip lines fabricated with both aluminum metallization and copper metallizati…
View article: Antenna Diversity Techniques for Bluetooth Communication
Antenna Diversity Techniques for Bluetooth Communication Open
In order to cope with the environmental impacts on Bluetooth data transmission diversity techniques were examined. A Bluetooth antenna diversity demonstrator was developed. Extensive experimental investigations documenting the significant …
View article: CMOS and SiGe Bipolar Circuits for High-Speed Applications
CMOS and SiGe Bipolar Circuits for High-Speed Applications Open
Recently, CMOS has been demonstrated to be a viable technology for very-high-bit-rate broadband and wireless communication systems up to 40 Gb/s and 50 GHz. Advances in device scaling and doping-profile optimization have also resulted n Si…
View article: Characterization of Microstrip Waveguides in Silicon up to 80 GHz
Characterization of Microstrip Waveguides in Silicon up to 80 GHz Open
A monolithically integrated microstrip waveguide in a 0.5 µm, Si bipolar technology is presented.This single microstrip line is a common type of on chip interconnnect.The waveguide is characterized by S-parameter measurement in a frequency…