Publisher: Scientific Research Publishing   (Total: 230 journals)

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Showing 1 - 200 of 243 Journals sorted alphabetically
Advances in Aerospace Science and Technology     Open Access   (Followers: 16)
Advances in Alzheimer's Disease     Open Access   (Followers: 8)
Advances in Anthropology     Open Access   (Followers: 19)
Advances in Applied Sociology     Open Access   (Followers: 16)
Advances in Biological Chemistry     Open Access   (Followers: 9)
Advances in Bioscience and Biotechnology     Open Access   (Followers: 21)
Advances in Breast Cancer Research     Open Access   (Followers: 18)
Advances in Chemical Engineering and Science     Open Access   (Followers: 111)
Advances in Computed Tomography     Open Access   (Followers: 2)
Advances in Entomology     Open Access   (Followers: 3)
Advances in Enzyme Research     Open Access   (Followers: 10)
Advances in Historical Studies     Open Access   (Followers: 10)
Advances in Infectious Diseases     Open Access   (Followers: 9)
Advances in Internet of Things     Open Access   (Followers: 18)
Advances in J.ism and Communication     Open Access   (Followers: 27)
Advances in Linear Algebra & Matrix Theory     Open Access   (Followers: 6)
Advances in Literary Study     Open Access   (Followers: 1)
Advances in Lung Cancer     Open Access   (Followers: 11)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 32)
Advances in Microbiology     Open Access   (Followers: 24)
Advances in Molecular Imaging     Open Access   (Followers: 1)
Advances in Nanoparticles     Open Access   (Followers: 17)
Advances in Parkinson's Disease     Open Access   (Followers: 2)
Advances in Physical Education     Open Access   (Followers: 11)
Advances in Pure Mathematics     Open Access   (Followers: 9)
Advances in Remote Sensing     Open Access   (Followers: 57)
Advances in Reproductive Sciences     Open Access   (Followers: 1)
Advances in Sexual Medicine     Open Access   (Followers: 3)
Agricultural Sciences     Open Access   (Followers: 5)
American J. of Analytical Chemistry     Open Access   (Followers: 28)
American J. of Climate Change     Open Access   (Followers: 42)
American J. of Computational Mathematics     Open Access   (Followers: 4)
American J. of Industrial and Business Management     Open Access   (Followers: 24)
American J. of Molecular Biology     Open Access   (Followers: 4)
American J. of Operations Research     Open Access   (Followers: 6)
American J. of Plant Sciences     Open Access   (Followers: 20)
Applied Mathematics     Open Access   (Followers: 7)
Archaeological Discovery     Open Access   (Followers: 3)
Art and Design Review     Open Access   (Followers: 13)
Atmospheric and Climate Sciences     Open Access   (Followers: 32)
Beijing Law Review     Open Access   (Followers: 4)
Case Reports in Clinical Medicine     Open Access   (Followers: 3)
CellBio     Open Access  
Chinese Medicine     Open Access   (Followers: 3)
Chinese Studies     Open Access   (Followers: 4)
Circuits and Systems     Open Access   (Followers: 16)
Communications and Network     Open Access   (Followers: 13)
Computational Chemistry     Open Access   (Followers: 3)
Computational Molecular Bioscience     Open Access   (Followers: 1)
Computational Water, Energy, and Environmental Engineering     Open Access   (Followers: 5)
Creative Education     Open Access   (Followers: 14)
Crystal Structure Theory and Applications     Open Access   (Followers: 4)
Current Urban Studies     Open Access   (Followers: 15)
Detection     Open Access   (Followers: 3)
E-Health Telecommunication Systems and Networks     Open Access   (Followers: 3)
Energy and Power Engineering     Open Access   (Followers: 23)
Engineering     Open Access   (Followers: 2)
Food and Nutrition Sciences     Open Access   (Followers: 24)
Forensic Medicine and Anatomy Research     Open Access   (Followers: 7)
Geomaterials     Open Access   (Followers: 2)
Graphene     Open Access   (Followers: 7)
Green and Sustainable Chemistry     Open Access   (Followers: 4)
Health     Open Access   (Followers: 4)
iBusiness     Open Access   (Followers: 2)
InfraMatics     Open Access  
Intelligent Control and Automation     Open Access   (Followers: 6)
Intelligent Information Management     Open Access   (Followers: 7)
Intl. J. of Analytical Mass Spectrometry and Chromatography     Open Access   (Followers: 7)
Intl. J. of Astronomy and Astrophysics     Open Access   (Followers: 35)
Intl. J. of Clean Coal and Energy     Open Access   (Followers: 2)
Intl. J. of Clinical Medicine     Open Access   (Followers: 2)
Intl. J. of Communications, Network and System Sciences     Open Access   (Followers: 9)
Intl. J. of Geosciences     Open Access   (Followers: 10)
Intl. J. of Intelligence Science     Open Access   (Followers: 3)
Intl. J. of Internet and Distributed Systems     Open Access   (Followers: 2)
Intl. J. of Medical Physics, Clinical Engineering and Radiation Oncology     Open Access   (Followers: 11)
Intl. J. of Modern Nonlinear Theory and Application     Open Access   (Followers: 2)
Intl. J. of Nonferrous Metallurgy     Open Access   (Followers: 5)
Intl. J. of Organic Chemistry     Open Access   (Followers: 9)
Intl. J. of Otolaryngology and Head & Neck Surgery     Open Access   (Followers: 5)
J. of Agricultural Chemistry and Environment     Open Access   (Followers: 3)
J. of Analytical Sciences, Methods and Instrumentation     Open Access   (Followers: 5)
J. of Applied Mathematics and Physics     Open Access   (Followers: 9)
J. of Behavioral and Brain Science     Open Access   (Followers: 7)
J. of Biomaterials and Nanobiotechnology     Open Access   (Followers: 6)
J. of Biomedical Science and Engineering     Open Access   (Followers: 1)
J. of Biophysical Chemistry     Open Access   (Followers: 3)
J. of Biosciences and Medicines     Open Access  
J. of Building Construction and Planning Research     Open Access   (Followers: 10)
J. of Cancer Therapy     Open Access   (Followers: 1)
J. of Computer and Communications     Open Access   (Followers: 1)
J. of Cosmetics, Dermatological Sciences and Applications     Open Access   (Followers: 2)
J. of Crystallization Process and Technology     Open Access   (Followers: 7)
J. of Data Analysis and Information Processing     Open Access   (Followers: 2)
J. of Diabetes Mellitus     Open Access   (Followers: 6)
J. of Electromagnetic Analysis and Applications     Open Access   (Followers: 5)
J. of Electronics Cooling and Thermal Control     Open Access   (Followers: 9)
J. of Encapsulation and Adsorption Sciences     Open Access   (Followers: 1)
J. of Environmental Protection     Open Access   (Followers: 1)
J. of Financial Risk Management     Open Access   (Followers: 7)
J. of Flow Control, Measurement & Visualization     Open Access   (Followers: 1)
J. of Geographic Information System     Open Access   (Followers: 6)
J. of Geoscience and Environment Protection     Open Access  
J. of High Energy Physics, Gravitation and Cosmology     Open Access   (Followers: 2)
J. of Human Resource and Sustainability Studies     Open Access   (Followers: 1)
J. of Immune Based Therapies, Vaccines and Antimicrobials     Open Access   (Followers: 2)
J. of Information Security     Open Access   (Followers: 11)
J. of Intelligent Learning Systems and Applications     Open Access   (Followers: 4)
J. of Materials Science and Chemical Engineering     Open Access   (Followers: 1)
J. of Mathematical Finance     Open Access   (Followers: 6)
J. of Minerals and Materials Characterization and Engineering     Open Access   (Followers: 3)
J. of Modern Physics     Open Access   (Followers: 8)
J. of Power and Energy Engineering     Open Access   (Followers: 2)
J. of Quantum Information Science     Open Access   (Followers: 4)
J. of Sensor Technology     Open Access   (Followers: 3)
J. of Service Science and Management     Open Access  
J. of Signal and Information Processing     Open Access   (Followers: 9)
J. of Software Engineering and Applications     Open Access   (Followers: 12)
J. of Surface Engineered Materials and Advanced Technology     Open Access   (Followers: 3)
J. of Sustainable Bioenergy Systems     Full-text available via subscription  
J. of Transportation Technologies     Open Access   (Followers: 13)
J. of Tuberculosis Research     Open Access   (Followers: 1)
J. of Water Resource and Protection     Open Access   (Followers: 6)
Low Carbon Economy     Open Access   (Followers: 4)
Materials Sciences and Applications     Open Access   (Followers: 2)
Microscopy Research     Open Access   (Followers: 2)
Modeling and Numerical Simulation of Material Science     Open Access   (Followers: 12)
Modern Chemotherapy     Open Access  
Modern Economy     Open Access   (Followers: 3)
Modern Instrumentation     Open Access   (Followers: 58)
Modern Mechanical Engineering     Open Access   (Followers: 66)
Modern Plastic Surgery     Open Access   (Followers: 6)
Modern Research in Catalysis     Open Access  
Modern Research in Inflammation     Open Access  
Natural Resources     Open Access  
Natural Science     Open Access   (Followers: 8)
Neuroscience & Medicine     Open Access   (Followers: 2)
New J. of Glass and Ceramics     Open Access   (Followers: 6)
Occupational Diseases and Environmental Medicine     Open Access   (Followers: 3)
Open J. of Accounting     Open Access   (Followers: 2)
Open J. of Acoustics     Open Access   (Followers: 23)
Open J. of Air Pollution     Open Access   (Followers: 4)
Open J. of Anesthesiology     Open Access   (Followers: 9)
Open J. of Animal Sciences     Open Access   (Followers: 4)
Open J. of Antennas and Propagation     Open Access   (Followers: 8)
Open J. of Apoptosis     Open Access  
Open J. of Applied Biosensor     Open Access  
Open J. of Applied Sciences     Open Access  
Open J. of Biophysics     Open Access  
Open J. of Blood Diseases     Open Access  
Open J. of Business and Management     Open Access   (Followers: 3)
Open J. of Cell Biology     Open Access   (Followers: 1)
Open J. of Civil Engineering     Open Access   (Followers: 7)
Open J. of Clinical Diagnostics     Open Access   (Followers: 1)
Open J. of Composite Materials     Open Access   (Followers: 22)
Open J. of Depression     Open Access   (Followers: 2)
Open J. of Discrete Mathematics     Open Access   (Followers: 3)
Open J. of Earthquake Research     Open Access   (Followers: 3)
Open J. of Ecology     Open Access   (Followers: 8)
Open J. of Emergency Medicine     Open Access   (Followers: 2)
Open J. of Endocrine and Metabolic Diseases     Open Access   (Followers: 1)
Open J. of Energy Efficiency     Open Access   (Followers: 1)
Open J. of Epidemiology     Open Access   (Followers: 2)
Open J. of Fluid Dynamics     Open Access   (Followers: 33)
Open J. of Forestry     Open Access   (Followers: 1)
Open J. of Gastroenterology     Open Access   (Followers: 1)
Open J. of Genetics     Open Access  
Open J. of Geology     Open Access   (Followers: 14)
Open J. of Immunology     Open Access   (Followers: 4)
Open J. of Inorganic Chemistry     Open Access   (Followers: 1)
Open J. of Inorganic Non-metallic Materials     Open Access   (Followers: 2)
Open J. of Internal Medicine     Open Access  
Open J. of Leadership     Open Access   (Followers: 18)
Open J. of Marine Science     Open Access   (Followers: 6)
Open J. of Medical Imaging     Open Access   (Followers: 2)
Open J. of Medical Microbiology     Open Access   (Followers: 4)
Open J. of Medical Psychology     Open Access  
Open J. of Medicinal Chemistry     Open Access   (Followers: 4)
Open J. of Metal     Open Access   (Followers: 1)
Open J. of Microphysics     Open Access  
Open J. of Modelling and Simulation     Open Access   (Followers: 2)
Open J. of Modern Hydrology     Open Access   (Followers: 5)
Open J. of Modern Linguistics     Open Access   (Followers: 5)
Open J. of Modern Neurosurgery     Open Access   (Followers: 2)
Open J. of Molecular and Integrative Physiology     Open Access  
Open J. of Nephrology     Open Access   (Followers: 4)
Open J. of Nursing     Open Access   (Followers: 4)
Open J. of Obstetrics and Gynecology     Open Access   (Followers: 5)
Open J. of Ophthalmology     Open Access   (Followers: 3)
Open J. of Optimization     Open Access  
Open J. of Organ Transplant Surgery     Open Access   (Followers: 1)
Open J. of Organic Polymer Materials     Open Access   (Followers: 1)
Open J. of Orthopedics     Open Access   (Followers: 3)
Open J. of Pathology     Open Access   (Followers: 2)
Open J. of Pediatrics     Open Access   (Followers: 4)
Open J. of Philosophy     Open Access   (Followers: 11)
Open J. of Physical Chemistry     Open Access  
Open J. of Political Science     Open Access   (Followers: 5)
Open J. of Polymer Chemistry     Open Access   (Followers: 12)
Open J. of Preventive Medicine     Open Access  

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Journal Cover
Open Journal of Antennas and Propagation
Number of Followers: 8  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2329-8421 - ISSN (Online) 2329-8413
Published by Scientific Research Publishing Homepage  [230 journals]
  • Radar system with dedicated planar traveling wave antennas for elderly
           people monitoring

    • Abstract: Radar system with dedicated planar traveling wave antennas for elderly people monitoring
      Sassan Schäfer, Simon Müller, Daniel Schmiech, and Andreas R. Diewald
      Adv. Radio Sci., 18, 97–110, https://doi.org/10.5194/ars-18-97-2020, 2020
      In this paper two different antenna topologies for improving the heart beat and breathing detection of people in their homes is shown. A radar system including these antennas for imaging with digital beamforming algorithms has been developed and presented. Measurements are executed and given in this paper with a conclusion.
      PubDate: Thu, 10 Dec 2020 18:15:37 +010
      DOI: 10.5194/ars-18-97-2020 2020

       
  • Respiration parameter determination with non-obstructive methods

    • Abstract: Respiration parameter determination with non-obstructive methods
      Sven Fisahn, Christian Siebauer, Jan Ringkamp, Kirsten J. Dehning, Stefan Zimmermann, and Jens Langejürgen
      Adv. Radio Sci., 18, 89–95, https://doi.org/10.5194/ars-18-89-2020, 2020
      In artificial ventilation of neonates uncuffed endotracheal tubes are commonly used. The unknown leakage hampers the detection of spontaneous breathing. A new method to measure respiration by using antennae has recently been presented. A respective setup is investigated numerically and experimentally. Both approaches show that the method seems capable of allowing a contactless triggering to synchronize ventilation. The results are compared to derive a better understanding of influencing factors.
      PubDate: Thu, 10 Dec 2020 18:15:37 +010
      DOI: 10.5194/ars-18-89-2020 2020

       
  • Observations of Solar Type III radio bursts by Cassini/RPWS experiment

    • Abstract: Observations of Solar Type III radio bursts by Cassini/RPWS experiment
      Mohammed Y. Boudjada, Ahmed Abou el-Fadl, Patrick H. M. Galopeau, Eimad Al-Haddad, and Helmut Lammer
      Adv. Radio Sci., 18, 83–87, https://doi.org/10.5194/ars-18-83-2020, 2020
      We investigate the solar Type III radio bursts recorded at about 10 AU by Cassini spacecraft. More than 300 bursts have been recorded by the RPWS experiment in the time interval from 01 Jan. 2008 to 31 Dec. 2014. We show that the solar Type III occurrence is mainly depending on the solar activity and also exhibits maxima and minima of detection. The source location of such solar bursts is the interplanetary medium because the dominant emission appears at frequency lower than 2.3 MHz.
      PubDate: Thu, 10 Dec 2020 18:15:37 +010
      DOI: 10.5194/ars-18-83-2020 2020

       
  • Experimental Investigation of a Nonlinear Energy Storage Effect due to
           High Power Electromagnetic Excitation

    • Abstract: Experimental Investigation of a Nonlinear Energy Storage Effect due to High Power Electromagnetic Excitation
      Robert Michels, Martin Schaarschmidt, and Frank Gronwald
      Adv. Radio Sci., 18, 75–82, https://doi.org/10.5194/ars-18-75-2020, 2020
      The susceptibility of interference victims can significantly be influenced by the presence of nonlinear circuit elements. In addition to the well known occurrence of intermodulation-frequencies, other effects can be observed as well. Recently, a nonlinear energy storage effect has been discovered which is due to the presence of nonlinearly loaded loop antennas if excited by an HPEM-excitation. In this contribution, this effect is further studied by experiment. It is seen that the nonlinear energy storage effect can be reproduced by means of a rather simple experimental setup. This allows to straighforwardly study parameter variations in order to attain an improved understanding of the considered effect.
      PubDate: Thu, 10 Dec 2020 18:15:37 +010
      DOI: 10.5194/ars-18-75-2020 2020

       
  • Approximation and analysis of transient responses of a reverberation
           chamber by pulsed excitation

    • Abstract: Approximation and analysis of transient responses of a reverberation chamber by pulsed excitation
      Konstantin Pasche, Fabian Ossevorth, and Ralf T. Jacobs
      Adv. Radio Sci., 18, 53–73, https://doi.org/10.5194/ars-18-53-2020, 2020
      Reverberation chambers show transient behaviour when excited with a pulsed signal. The field intensities can in this case be significantly higher than in steady state, which implies that a transient field can exceed predefined limits and render test results uncertain. Effects of excessive field intensities of short duration may get covered and not be observable in a statistical analysis of the field characteristics. In order to ensure that the signal reaches steady state, the duration of the pulse used to excite the chamber needs to be longer than the time constant of the chamber. Initial computations have shown that the pulse width should be about twice as long as the time constant of the chamber to ensure that steady state is reached. The signal is sampled in the time domain with a sampling frequency according to the Nyquist theorem. The bandwidth of the input signal is determined using spectral analysis. For a fixed stirrer position, the reverberation chamber, wires, connectors, and antennas can jointly be considered as a linear time-invariant system. In this article, a procedure will be presented to extract characteristic signal properties such as rise-time, transient overshoot and the mean value in steady state from the system response. The signal properties are determined by first computing the envelope of the sampled data using a Hilbert transform. Subsequent noise reduction is achieved applying a Savitzky–Golay filter. The point where steady state is reached is then computed from the slope of the envelope by utilising a cumulative histogram. The spectral analysis is not suitable to examine the transient behaviour and determine the time constants of the system. These constants are computed applying the method of Prony, which is based on the estimation of a number of parameters in a sum of exponential functions. An alternative to the Prony Method is the Time-Domain Vector-Fit method. In contrast to the first mentioned variant, it is now also possible to determine the transfer function of the overall RC system. Differences and advantages of the methods will be discussed.
      PubDate: Thu, 10 Dec 2020 18:15:37 +010
      DOI: 10.5194/ars-18-53-2020 2020

       
  • Scattering and diffraction of a uniform complex-source beam by a slit in a
           perfectly conducting plane screen

    • Abstract: Scattering and diffraction of a uniform complex-source beam by a slit in a perfectly conducting plane screen
      Ludger Klinkenbusch
      Adv. Radio Sci., 18, 43–52, https://doi.org/10.5194/ars-18-43-2020, 2020
      A new analytical method has been introduced to exactly solve the classical problem of electromagnetic diffraction by a slit. It is faster and easier to implement than the standard solution using Mathieu functions. Moreover, the paper contains a successful comparison of the scattered fields for an incident plane wave with that one obtained for an incident Gaussian beam which is easily modelled by a complex-source beam.
      PubDate: Thu, 10 Dec 2020 18:15:37 +010
      DOI: 10.5194/ars-18-43-2020 2020

       
  • Characteristic Mode Analysis of surface current distributions on metallic
           structures exposed to HIRF- and DCI-excitations

    • Abstract: Characteristic Mode Analysis of surface current distributions on metallic structures exposed to HIRF- and DCI-excitations
      Jan Ückerseifer and Frank Gronwald
      Adv. Radio Sci., 18, 33–41, https://doi.org/10.5194/ars-18-33-2020, 2020
      This paper treats Characteristic Mode Analyses of three-dimensional test objects in the context of EMC. Based on computed Characteristic Modes and mode-specific physical quantities, series expansions for HIRF- and DCI-induced surface currents are deduced. The contribution of single Characteristic Modes to surface currents at different test frequencies is analyzed. HIRF- and DCI-excitations are compared with regard to their surface current distributions in their resonance region determined by Characteristic Mode Analysis.
      PubDate: Thu, 10 Dec 2020 18:15:37 +010
      DOI: 10.5194/ars-18-33-2020 2020

       
  • Towards 3D Simulation for Disaster Intervention Robot Behaviour Assessment

    • Abstract: Towards 3D Simulation for Disaster Intervention Robot Behaviour Assessment
      Matteo Bertolino and Tullio J. Tanzi
      Adv. Radio Sci., 18, 23–32, https://doi.org/10.5194/ars-18-23-2020, 2020
      The paper presents our work to validate the architecture (software and hardware, including sensors) of ArcTurius Rover. ArcTurius is an autonomous system dedicated to the precise location of survivors after a disaster. To be sure that ArcTurius is adapted to a specific mission, we rely on a set of 3D simulations. In this paper, we focus on finding the best parametrization for a LiDAR sensor. We target to find the best trade-off between the quality of the acquired data and energy consumption.
      PubDate: Thu, 10 Dec 2020 18:15:37 +010
      DOI: 10.5194/ars-18-23-2020 2020

       
  • Near-Field Antenna Measurements with Manual Collection of the Measurement
           Samples

    • Abstract: Near-Field Antenna Measurements with Manual Collection of the Measurement Samples
      Fabian T. Faul, Hans-Jürgen Steiner, and Thomas F. Eibert
      Adv. Radio Sci., 18, 17–22, https://doi.org/10.5194/ars-18-17-2020, 2020
      Near-field measurements are commonly performed in anechoic chambers which limits the flexibility and requires high precision equipment to achieve exact results. We investigate a simple near-field measurement setup that does not use a sophisticated positioning system nor does it operate in a controlled environment. Instead, the probe antenna is moved by an operator person while its position is measured by a laser tracker. Measurement results are shown to illustrate the performance of the system.
      PubDate: Thu, 10 Dec 2020 18:15:37 +010
      DOI: 10.5194/ars-18-17-2020 2020

       
  • Transparent boundary condition for the calculation of eigenmodes in
           transversely infinite waveguides

    • Abstract: Transparent boundary condition for the calculation of eigenmodes in transversely infinite waveguides
      Mikhail Patrushev, Wolfgang Ackermann, and Thomas Weiland
      Adv. Radio Sci., 18, 7–16, https://doi.org/10.5194/ars-18-7-2020, 2020
      Waveguides play one of the key figures in today's electronics and optics for signal transmission. Corresponding simulations of electromagnetic wave transportation along these waveguides are accomplished by discretization methods such as the Finite Integration Technique (FIT) or the Finite Element Method (FEM). For longitudinally homogeneous and transversely unbounded waveguides these simulations can be approximated by closed boundaries. However, this distorts the original physical model and unnecessarily increases the size of the computational domain size. In this article we present a boundary condition for transversely open waveguides based on the Kirchhoff integral which has been implemented within the framework of FIT. The presented solution is compared with selected conventional methods in terms of computational effort and memory consumption.
      PubDate: Thu, 10 Dec 2020 18:15:37 +010
      DOI: 10.5194/ars-18-7-2020 2020

       
  • Design of a continuously tunable reflectarray element for 5G metrology in
           the k-band

    • Abstract: Design of a continuously tunable reflectarray element for 5G metrology in the k-band
      Thomas Harz, Thomas Kleine-Ostmann, and Thorsten Schrader
      Adv. Radio Sci., 18, 1–5, https://doi.org/10.5194/ars-18-1-2020, 2020
      We introduce a new tunable reflectarray element for an operation frequency of 26 GHz in the k-band. It is shown that a 340∘ continuous tunning range of the reflected wave can be accomplished by using an aperture-coupled patch antenna with only one single varactor diode. The simplified design and the small needed space make it usable for k-band reflectarrays with many elements. The functionality of the reflectarray element is explained and the crucial parts are analyzed. The approach to get a full phase shift is discussed in detail. A bias-T is developed to provide the control voltage to the varactor diode without interfering with the high frequency path. The high frequency path and the DC-path are decoupled by 39 dB using a bias-T. A commercial off-the-shelf varactor diode is selected and its functionality at 26 GHz is verified. Therefore, a test printed circuit board with through, reflect, line standards is developed to de-embed the varactor diode and to evaluate it with a vector network analyzer. The reflectarray is simulated in a unit cell with plane wave excitation and periodic boundary condition using the simulation software package CST Microwave Studio™.
      PubDate: Thu, 10 Dec 2020 18:15:37 +010
      DOI: 10.5194/ars-18-1-2020 2020

       
  • Verification and first test measurement of a microwave-based vital sign
           monitor

    • Abstract: Verification and first test measurement of a microwave-based vital sign monitor
      Daniel Schmiech, Aly Marnach, and Andreas R. Diewald
      Adv. Radio Sci., 17, 249–256, https://doi.org/10.5194/ars-17-249-2019, 2019
      One of the most important signs of a living body demonstrating its life-sustaining functions is the respiration rate. State of the art for measuring this vital sign is using a monitoring system cable connected to electrodes which are attached to the patients' skin. Especially in the case of newborn infants this method is not always suitable and causing several problems, like skin injuries, high stress levels and random loosening of the sensor. To avoid these a non-contact system is developed.
      PubDate: Mon, 14 Oct 2019 18:15:37 +020
      DOI: 10.5194/ars-17-249-2019 2019

       
  • Realization and opto-electronic Characterization of linear Self-Reset
           Pixel Cells for a high dynamic CMOS Image Sensor

    • Abstract: Realization and opto-electronic Characterization of linear Self-Reset Pixel Cells for a high dynamic CMOS Image Sensor
      Stefan Hirsch, Markus Strobel, Wolfram Klingler, Jan Dirk Schulze Spüntrup, Zili Yu, and Joachim N. Burghartz
      Adv. Radio Sci., 17, 239–247, https://doi.org/10.5194/ars-17-239-2019, 2019
      Applications in the fields of e.g. industrial image processing, image based robotic control systems and autonomous driving require high dynamic range image sensors. Conventional linear CMOS image sensors only have a limited dynamic range. To extend the dynamic range the concept of a linear self-reset pixel is implemented with several pixel variants being realized and characterized on a CMOS chip. A second topic is the design with digital readout of a cluster structure composed of a pixel matrix.
      PubDate: Fri, 20 Sep 2019 18:15:37 +020
      DOI: 10.5194/ars-17-239-2019 2019

       
  • D region observations by VHF and HF radars during a rocket campaign at
           And√łya dedicated to investigations of PMWE

    • Abstract: D region observations by VHF and HF radars during a rocket campaign at Andøya dedicated to investigations of PMWE
      Ralph Latteck, Toralf Renkwitz, and Boris Strelnikov
      Adv. Radio Sci., 17, 225–237, https://doi.org/10.5194/ars-17-225-2019, 2019
      In April 2018 the PMWE1 sounding rocket campaign was conducted at the Andøya Space Center involving coordinated measurements with rockets and ground instruments to measure parameters relevant for testing of the existing theories of PMWE formation. The Middle Atmosphere Alomar Radar System (MAARSY) was operated to detect PMWE with multiple beam directions. The Saura MF radar was operated with a multiple beam experiment to derive horizontal winds and electron density profiles.
      PubDate: Thu, 19 Sep 2019 18:15:37 +020
      DOI: 10.5194/ars-17-225-2019 2019

       
  • Tidal wind shear observed by meteor radar and comparison with sporadic E
           occurrence rates based on GPS radio occultation observations

    • Abstract: Tidal wind shear observed by meteor radar and comparison with sporadic E occurrence rates based on GPS radio occultation observations
      Christoph Jacobi and Christina Arras
      Adv. Radio Sci., 17, 213–224, https://doi.org/10.5194/ars-17-213-2019, 2019
      We analyze tidal phases and related wind shear in the mesosphere andlower thermosphere as observed by a meteor radar. The wind shear phases are compared with those of sporadic E occurrence rates, which were derived from GPS radio occultation observations. We find good correspondence between radar derived wind shear and sporadic E phases for the semidiurnal, terdiurnal, and quarterdiurnal tidal components, but not for the diurnal tide.
      PubDate: Thu, 19 Sep 2019 18:15:37 +020
      DOI: 10.5194/ars-17-213-2019 2019

       
  • Estimation of ionospheric reflection height using long wave propagation

    • Abstract: Estimation of ionospheric reflection height using long wave propagation
      Dieter Keuer
      Adv. Radio Sci., 17, 205–212, https://doi.org/10.5194/ars-17-205-2019, 2019
      Phase height measurements of low frequency radio waves are used to study the long-term variability of the mesosphere over Europe. But a refinement of this measurements suggest that it must be considered as one that only reflects integral properties of the hole region from the mesosphere over the stratosphere down to the troposphere. The sole coupling of these measurements to the mesosphere must be dropped.
      PubDate: Thu, 19 Sep 2019 18:15:37 +020
      DOI: 10.5194/ars-17-205-2019 2019

       
  • Dielectric corner reflectors for mmWave applications

    • Abstract: Dielectric corner reflectors for mmWave applications
      Christian Buchberger, Florian Pfeiffer, and Erwin Biebl
      Adv. Radio Sci., 17, 197–203, https://doi.org/10.5194/ars-17-197-2019, 2019
      This article investigates the properties of dielectric corner reflectors for use in a number of millimeter wave applications, such as road safety for autonomous driving. Material characterizations of different typical plastics using transmission measurements are presented, as well as an analysis of their respective radar cross section (RCS) when used as corner reflectors. They exhibit similar behavior as conventional metallic reflectors, while intrinsic dielectric losses reduce the overall RCS.
      PubDate: Thu, 19 Sep 2019 18:15:37 +020
      DOI: 10.5194/ars-17-197-2019 2019

       
  • Extending the vehicular network simulator Artery in order to generate
           synthetic data for collective perception

    • Abstract: Extending the vehicular network simulator Artery in order to generate synthetic data for collective perception
      Christoph Allig and Gerd Wanielik
      Adv. Radio Sci., 17, 189–196, https://doi.org/10.5194/ars-17-189-2019, 2019
      A fundamental for an automated driving car is the awareness of its surrounding road participants. Current approach to gather this awareness is to sense the environment by on-board sensors. In the future, Vehicle-to-X (V2X) might be able to improve the awareness. We propose to create synthetic data for investigating cooperative perception by a simulation tool. Therefore, Artery and its counterpart SUMO is extended by modelling realistic vehicle dynamics and probabilistic sensor models.
      PubDate: Thu, 19 Sep 2019 18:15:37 +020
      DOI: 10.5194/ars-17-189-2019 2019

       
  • Singularity Expansion Method for thin wires and the Method of Modal
           Parameters

    • Abstract: Singularity Expansion Method for thin wires and the Method of Modal Parameters
      Sergey V. Tkachenko, Juergen B. Nitsch, Felix Middelstaedt, Ronald Rambousky, Martin Schaarschmidt, and Ralf Vick
      Adv. Radio Sci., 17, 177–187, https://doi.org/10.5194/ars-17-177-2019, 2019
      Using the method of modal parameters, developed earlier, equations for the Singularity Expansion Method (SEM) poles were obtained. Numerical investigation of solutions for the poles of the fist layer have shown good agreement with analytical and numerical results obtained earlier.
      PubDate: Thu, 19 Sep 2019 18:15:37 +020
      DOI: 10.5194/ars-17-177-2019 2019

       
  • Analysis of an Iterative Approach to Determine the Current on the Straight
           Infinite Wire Above Ground

    • Abstract: Analysis of an Iterative Approach to Determine the Current on the Straight Infinite Wire Above Ground
      Felix Middelstaedt, Sergey V. Tkachenko, and Ralf Vick
      Adv. Radio Sci., 17, 169–176, https://doi.org/10.5194/ars-17-169-2019, 2019
      An iterative approach which was recently applied to approximate the reflection and scattering coefficients of transmission line ports is analyzed. The iterative solution for the current on an infinite wire above ground is compared to the exact solution. The example is chosen since it is one of the few problems where an exact solution exists. The wire is excited by a lumped voltage source or a plane wave. The convergence of the iterative approach is shown. It can be concluded that the zeroth iteration, which is the classical transmission line solution, coincides with the general transverse electromagnetic mode. Furthermore, it is shown that the first iteration is a very good approximation of the radiation and leaky modes, that occur in the close neighborhood around the lumped source.
      PubDate: Thu, 19 Sep 2019 18:15:37 +020
      DOI: 10.5194/ars-17-169-2019 2019

       
 
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