Now showing items 21-30 of 7329
A 160-GHz radar with flexible antenna used as a sniffer probe
(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 ...
Reducing the radar cross-section of microstrip arrays using AMC structures for the vehicle integration of automotive radars
(Universität Ulm, 2018)
Automotive radar sensors for driver assistance systems are usually installed behind the bumper of the car. Multiple reflections between radar and bumper can occur and may lead to a wrong estimation of the direction of ...
Reliable orientation estimation of vehicles in high-resolution radar images
(Universität Ulm, 2016-07-21)
With new generations of high-resolution imaging radars the orientation of vehicles can be estimated without temporal filtering. This enables time critical systems to respond even faster. Based on a large data set this paper ...
Analytical and experimental investigation on mitigation of interference in a DBF MIMO radar
(Universität Ulm, 2017)
As driver assistance systems and autonomous driving are on the rise, radar sensors become a common device for automobiles. The high sensor density leads to the occurrence of interference, which decreases the detection ...
Compensation of motion-induced phase errors in TDM MIMO radars
(Universität Ulm, 2017)
For high-resolution direction of arrival estimation, a wide aperture is necessary. This can be achieved with multiple-input multiple-output (MIMO) radars, which offer a wide virtual aperture. However, the requirement of ...
High range and doppler resolution by application of compressed sensing using low baseband bandwidth OFDM radar
(Universität Ulm, 2018-06-05)
Multi-carrier waveforms such as orthogonal frequency-division multiplexing (OFDM) found their way into radar applications in the last few years. However, currently, typically only a fraction of the large baseband bandwidth ...
Optimizing the design of GaAs/AlGaAs thin-film waveguides for integrated mid-infrared sensors
(Universität Ulm, 2016-06)
Optical simulations of GaAs/AlGaAs thin-film waveguides were performed for investigating the dependence of the modal behavior on waveguide geometry and the resulting analytical sensitivity. Simulations were performed for ...
Electron radiation damage mechanisms in 2D MoSe2
(Universität Ulm, 2017-01)
The contributions of different damage mechanisms in single-layer MoSe2 were studied by investigating different MoSe2/graphene heterostructures by the aberration-corrected high–resolution transmission electron microscopy ...
Simultaneous determination of monoatomic ions via infrared attenuated total reflection spectroscopy in aqueous solution at different temperatures
(Universität Ulm, 2016)
In this study, monoatomic and thus IR-inactive ions were determined via infrared attenuated total reflection (IR-ATR) spectroscopy including Cl(-), Na(+), Mg(2+), Ca(2+), K(+) and Br(-), next to the IR-active ion [Formula: ...
Towards on-chip mid-infrared sensors
(Universität Ulm, 2016-04-15)
This Feature highlights recent advances on mid-infrared thin-film waveguide technology and on-chip photonics facilitating next-generation label-free chem/bio sensor and assay platforms. Complemented by more recent advancements ...