JournalTOCs

Advances in Radio Science (ARS)
Journal Prestige (SJR): 0.199

Number of Followers: 12

This is an Open Access Journal

Open Access journal
ISSN (Print) 1684-9965 - ISSN (Online) 1684-9973
Published by Copernicus Publications

[54 journals]

Human RF Electromagnetic Exposure to V2X-Communication
- Abstract: Human RF Electromagnetic Exposure to V2X-Communication
  Lisa-Marie Schilling, Christian Bornkessel, and Matthias A. Hein
  Adv. Radio Sci., 19, 233–239, https://doi.org/10.5194/ars-19-233-2022, 2022
  Connected cars will be equipped with several wireless transmission technologies. The corresponding exposure of the general public will be significantly influenced by these technologies and must be correctly evaluated. A new measurement procedure suitable for the European vehicle communication standard ITS-G5 together with exposure measurements performed in different cars are described. In comparison with WiFi and Bluetooth, ITS-G5 generated the highest exposure inside a car.
  PubDate: Thu, 15 Sep 2022 08:42:37 +020
  DOI: 10.5194/ars-19-233-2022 2022
Far- and Near Range Measurements with a Synthetic Aperture Radar for
Educational Purposes and Comparison of Two Different Signal Processing
Algorithms
- Abstract: Far- and Near Range Measurements with a Synthetic Aperture Radar for Educational Purposes and Comparison of Two Different Signal Processing Algorithms
  Jonas Berg, Simon Müller, and Andreas R. Diewald
  Adv. Radio Sci., 19, 221–232, https://doi.org/10.5194/ars-19-221-2022, 2022
  This paper presents the implementation of two easy-to-implement methods for radar imaging with a radar system on a linear drive for educational purposes. This method is a so-called synthetic aperture radar (SAR) approach which is commonly used in the space and aeronautical earth observation. In this paper the two methods are compared with each other and drawbacks and advantages are discussed.
  PubDate: Mon, 21 Feb 2022 08:37:35 +010
  DOI: 10.5194/ars-19-221-2022 2022
Measurement and optimization of a continuously tunable 10×10 reflectarray
antenna for 5G metrology in the K-band
- Abstract: Measurement and optimization of a continuously tunable 10×10 reflectarray antenna for 5G metrology in the K-band
  Thomas Harz and Thomas Kleine-Ostmann
  Adv. Radio Sci., 19, 215–220, https://doi.org/10.5194/ars-19-215-2022, 2022
  In the upper (FR2) mm-wave 5G frequency band, the coverage area of a single antenna is very limited. Therefore, many antennas with electronical steering capability are needed for a good quality of service. These antennas have to be cost-effective and reliable, such as reflectarray antennas. The developed 10x10 reflectarray antenna has a gain of approximately 10 dBi and a continuous steering range from -30° to 30°.
  PubDate: Mon, 17 Jan 2022 14:47:29 +010
  DOI: 10.5194/ars-19-215-2022 2022
Innovative Differential Magnetic Localization Method for Capsule Endoscopy
to Prevent Interference Caused by the Geomagnetic Field
- Abstract: Innovative Differential Magnetic Localization Method for Capsule Endoscopy to Prevent Interference Caused by the Geomagnetic Field
  Samuel Zeising, Daisuke Anzai, Angelika Thalmayer, Georg Fischer, and Jens Kirchner
  Adv. Radio Sci., 19, 207–213, https://doi.org/10.5194/ars-19-207-2021, 2021
  For wireless capsule endoscopy (WCE), precise localization is an open research topic. In this study, a novel differential magnetic localization method for WCE is proposed. The differential method prevents interference of the geomagnetic field. Therefore, the mean position and orientation errors were significantly reduced by three orders in magnitude to less than 0.1 mm and 0.1°, respectively. In the future, the simulation-based results will be validated in experiments.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-207-2021 2021
Developing of Algorithms Monitoring Heartbeat and Respiration Rate of a
Seated Person with an FMCW Radar
- Abstract: Developing of Algorithms Monitoring Heartbeat and Respiration Rate of a Seated Person with an FMCW Radar
  Lorenz J. Dirksmeyer, Aly Marnach, Daniel Schmiech, and Andreas R. Diewald
  Adv. Radio Sci., 19, 195–206, https://doi.org/10.5194/ars-19-195-2021, 2021
  A radar working in the 24 GHz ISM-band in a frequency modulated continuous wave mode has been used for vital sign monitoring of the heart beat and the breathing rate. The observation is hereby contactless with the patient sitting straight up in a distance of 1–2 m to the radar. A mathematical method to calculate the heart beat and breathing rate is presented. The results are compared with classical ECG measurement equipment.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-195-2021 2021
Influence of geomagnetic disturbances on mean winds and tides in the
mesosphere/lower thermosphere at midlatitudes
- Abstract: Influence of geomagnetic disturbances on mean winds and tides in the mesosphere/lower thermosphere at midlatitudes
  Christoph Jacobi, Friederike Lilienthal, Dmitry Korotyshkin, Evgeny Merzlyakov, and Gunter Stober
  Adv. Radio Sci., 19, 185–193, https://doi.org/10.5194/ars-19-185-2021, 2021
  We compare winds and tidal amplitudes in the upper mesosphere/lower thermosphere region for cases with disturbed and undisturbed geomagnetic conditions. The zonal winds in both the mesosphere and lower thermosphere tend to be weaker during disturbed conditions. The summer equatorward meridional wind jet is weaker for disturbed geomagnetic conditions. The effect of geomagnetic variability on tidal amplitudes, except for the semidiurnal tide, is relatively small.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-185-2021 2021
Reconstruction of signal phases for signals closer than the DFT frequency
resolution
- Abstract: Reconstruction of signal phases for signals closer than the DFT frequency resolution
  Christian Schiffer and Andreas R. Diewald
  Adv. Radio Sci., 19, 179–184, https://doi.org/10.5194/ars-19-179-2021, 2021
  This paper evaluates a method for reconstructing the phase and amplitude of superimposed signals with a frequency separation smaller than the DTFT frequency resolution would allow to differentiate.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-179-2021 2021
3D Contour Shaping of Buried Objects in Soil
- Abstract: 3D Contour Shaping of Buried Objects in Soil
  Christian Siebauer and Heyno Garbe
  Adv. Radio Sci., 19, 173–178, https://doi.org/10.5194/ars-19-173-2021, 2021
  Large numbers of unexploded World War II bombs are recovered from the ground every year. However, it is often not clear whether an anonamly in the ground is actually dangerous goods or scrap. In this thesis an application of borehole radar is investigated, with which first a 2D image and then a 3D representation of the buried object is to be generated. Both performed simulation and field measurements show good results, even if optimizations are still necessary in the 3D representation.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-173-2021 2021
Road Surface Characteristics for the Automotive 77 GHz Band
- Abstract: Road Surface Characteristics for the Automotive 77 GHz Band
  Vera Kurz, Hannes Stuelzebach, Florian Pfeiffer, Carlo van Driesten, and Erwin Biebl
  Adv. Radio Sci., 19, 165–172, https://doi.org/10.5194/ars-19-165-2021, 2021
  On the way to autonomous driving a safety proof is inevitable. Here simulators can help, but their accuracy is not good enough, yet. In order to improve such simulations, we analyzed the behaviour of road surfaces on radar sensors. Therefore, laboratory measurements and open space measurements were performed. Differences depending on material and roughness could be proved. Furthermore, material parameters were calculated, which can be mapped to roads in existing simulation setups.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-165-2021 2021
Performance analysis of 300 GHz backhaul links using historic
weather data
- Abstract: Performance analysis of 300 GHz backhaul links using historic weather data
  Bo Kum Jung and Thomas Kürner
  Adv. Radio Sci., 19, 153–163, https://doi.org/10.5194/ars-19-153-2021, 2021
  Our research on the performance analysis of 300 GHz backhaul links considering historic weather data can show the feasibility of wireless backhaul links at the frequency range of 300 GHz under the general mid-term weather changes in Hanover area or the area whose general climate conditions are similar to Hanover.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-153-2021 2021
Compact Radar Cross-Section Measurement Setup and Performance Evaluation
- Abstract: Compact Radar Cross-Section Measurement Setup and Performance Evaluation
  Maximilian F. Sundermeier and Dirk Fischer
  Adv. Radio Sci., 19, 147–152, https://doi.org/10.5194/ars-19-147-2021, 2021
  Radar cross-section measurements require the background reflections to be much lower than the reflections of the device under test. Although, anechoic chambers with special target holders meet this requirement, they are expensive and still have imperfections. To reduce background reflections in environments where an anechoic chamber is not suitable, digital signal processing can be used. A complete signal processing realized in Matlab and a compact RCS measurement setup is presented.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-147-2021 2021
Method for prediction of EMI Emissions from Automotive Ethernet to Vehicle
Antennas
- Abstract: Method for prediction of EMI Emissions from Automotive Ethernet to Vehicle Antennas
  Emanuel Panholzer, Vadim Kobelski, Martin Aidam, Walter Franz, and Stefan Lindenmeier
  Adv. Radio Sci., 19, 139–146, https://doi.org/10.5194/ars-19-139-2021, 2021
  The publication presents an EMI safeguarding approach from an Automotive Ethernet ECU to the vehicle antenna, which allows the emission signal calculation at the antenna in an early vehicle development stage. The approach shows a more accurate safeguarding method than the state of the art approach by a system level test. In combination with the considered simulation in this work, a more efficient safeguarding process of communication systems is possible.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-139-2021 2021
Analysis of large-scale UHF-RFID use-cases utilizing full-wave simulation
techniques
- Abstract: Analysis of large-scale UHF-RFID use-cases utilizing full-wave simulation techniques
  Miroslav Lach, Christian Looschen, and Erwin Biebl
  Adv. Radio Sci., 19, 127–137, https://doi.org/10.5194/ars-19-127-2021, 2021
  A typical logistical RFID use-case is presented. The signal coverage is computed using accurate simulation techniques. A subsequent evaluation of the simulation results is performed. Emphasis is put on the derivation of expressive quantities to facilitate the evaluation and interpretation of the simulation results. Accurate simulations of the planned environment are essential to predict the real behavior and uncover flaws in the planned system, to avoid costly a-posteriori modifications.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-127-2021 2021
Design and Realization of Chebyshev Bandstop Filters Based on Ceramic
Resonators
- Abstract: Design and Realization of Chebyshev Bandstop Filters Based on Ceramic Resonators
  Jonas F. Tiede and Thomas F. Eibert
  Adv. Radio Sci., 19, 117–126, https://doi.org/10.5194/ars-19-117-2021, 2021
  In high-frequency technology, devices for filtering signals in the frequency domain are often based on resonant structures. As a result, the physical dimensions of a filter generally increase with decreasing frequency of operation. In this work, bandstop filters are built from special resonant elements with small physical dimensions to reduce the filter size. The small sizes result from the large permittivity of the used ceramic, increasing the electrical length of the resonant elements.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-117-2021 2021
Using analog computers in today's largest computational challenges
- Abstract: Using analog computers in today's largest computational challenges
  Sven Köppel, Bernd Ulmann, Lars Heimann, and Dirk Killat
  Adv. Radio Sci., 19, 105–116, https://doi.org/10.5194/ars-19-105-2021, 2021
  This paper discusses modern applications for high performance analog and hybrid computer. In the first part, we do a theoretical prediction concerning the properties of these machines. In the second part, we compare such a computer against a standard laptop CPU. We find thatthe even a rather simple analog computer is actually on a par.In the third part, we give an outlook how future highly integrated analog computers could be used to tackle very large computational problems.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-105-2021 2021
100 Years of Wireless Telephony in Germany: Experimental Radio
Transmission from Eberswalde and Königs Wusterhausen
- Abstract: 100 Years of Wireless Telephony in Germany: Experimental Radio Transmission from Eberswalde and Königs Wusterhausen
  Wolfgang Mathis and Anja Titze
  Adv. Radio Sci., 19, 93–104, https://doi.org/10.5194/ars-19-93-2021, 2021
  In this article, we examined the emergence of the new broadcast medium Radio in Germany shortly after World War I which is called Rundfunk in this country and consider the early radio transmitter stations in Eberswalde and Königs Wusterhausen.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-93-2021 2021
Simulation of GPS localisation based on ray tracing
- Abstract: Simulation of GPS localisation based on ray tracing
  Björn Friebel, Michael Schweins, Nils Dreyer, and Thomas Kürner
  Adv. Radio Sci., 19, 85–92, https://doi.org/10.5194/ars-19-85-2021, 2021
  In recent years, many simulation tools emerged to model the communication of connected vehicles. Thereby, the localization accuracy due to satellite navigation systems was treated as perfect. The effect of inaccurate positioning, however, was neglected so far. This paper presents a new simulation framework that can estimate the localisation accuracy of navigation systems like GPS, GLONASS or GALILEO, based on ray optical path loss predictions (ray tracing) considering 3D building data.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-85-2021 2021
A Low-Power Squaring Circuit with Regulated Output and Improved Settling
Time in 180 nm CMOS for 3–5 GHz IR-UWB Applications
- Abstract: A Low-Power Squaring Circuit with Regulated Output and Improved Settling Time in 180 nm CMOS for 3–5 GHz IR-UWB Applications
  Daniel Schrüfer, Jürgen Röber, Timo Mai, and Robert Weigel
  Adv. Radio Sci., 19, 79–84, https://doi.org/10.5194/ars-19-79-2021, 2021
  This paper demonstrates a squaring circuit, which is a key element in many low-power receivers, designed in a low-cost technology. For its functionality, the circuit exploits the typical characteristics of a transistor. To enhance the speed of the circuit and consequently to enable higher data rates for the receiver, a novel “boosting circuit” is implemented. An additional control circuit regulates the output and simplifies the detection of an incoming signal.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-79-2021 2021
Dynamic Eigenimage Based Background and Clutter Suppression for Ultra
Short-Range Radar
- Abstract: Dynamic Eigenimage Based Background and Clutter Suppression for Ultra Short-Range Radar
  Matthias G. Ehrnsperger, Maximilian Noll, Stefan Punzet, Uwe Siart, and Thomas F. Eibert
  Adv. Radio Sci., 19, 71–77, https://doi.org/10.5194/ars-19-71-2021, 2021
  In the paper we describe how the detection of living objects, such as people and animals, can be significantly improved. It is particularly important to detect people in dangerous environments to protect them. For such a detection task we use a radar system. Radar, because the detection also has to work at night and if it rains or snows, these are the situations when other systems, i.e. cameras, fail. Our experiments showed that many radar applications can benefit from our approach.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-71-2021 2021
Communication Performance vs. Implementation Trade-offs of Interpolation
Techniques for FFT-Based Carrier Synchronization exemplified on DVB-RCS2
- Abstract: Communication Performance vs. Implementation Trade-offs of Interpolation Techniques for FFT-Based Carrier Synchronization exemplified on DVB-RCS2
  Oliver Griebel, Uwe Wasenmüller, and Norbert Wehn
  Adv. Radio Sci., 19, 59–70, https://doi.org/10.5194/ars-19-59-2021, 2021
  Carrier synchronization is a crucial part of any wireless receiver, which is required due to frequency and phase offset. In this work, we compare interpolation techniques with different FFT-based carrier synchronization methods. Applied to reference burst types specified in the DVB-RCS2 standard, trade-offs between communication performance and hardware implementation efficiency are shown. Furthermore, we present and analyze a flexible IP core implemented on FPGA.
  PubDate: Fri, 17 Dec 2021 18:01:45 +010
  DOI: 10.5194/ars-19-59-2021 2021