Advances in Radio Science最新文献_第8页

Modeling and Simulation of stochastically deformed Waveguides using Schelkunoff's Method 随机变形波导的schelkuoff法建模与仿真

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Advances in Radio Science Pub Date : 2018-09-04 DOI: 10.5194/ARS-16-35-2018

Hoang Duc Pham, Soeren Ploennigs, W. Mathis

引用次数: 1

Design and implementation of a flexible node for IoT supporting 6LoWPAN and a sensor shield for home automation application 设计和实现支持6LoWPAN的物联网灵活节点和用于家庭自动化应用的传感器屏蔽

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Advances in Radio Science Pub Date : 2018-09-04 DOI: 10.5194/ARS-16-67-2018

J. Arndt, Tim Lauber, R. Wunderlich, S. Heinen

{"title":"Design and implementation of a flexible node for IoT supporting 6LoWPAN and a sensor shield for home automation application","authors":"J. Arndt, Tim Lauber, R. Wunderlich, S. Heinen","doi":"10.5194/ARS-16-67-2018","DOIUrl":"https://doi.org/10.5194/ARS-16-67-2018","url":null,"abstract":"Abstract. The Internet of Things (IoT) and Industry 4.0 is evolving and has a high demand for reliable electronics. This work contributes to the creation of user-friendly and robust applications for the IoT. The topic is the development of a radio communication system regarding the requirements for the end user and concerning a high flexibility of the application. The result is a core board featuring USB programming capability to flash the user application, USB power delivery (USB-PD) for battery charging, a fuel gauge, as well as a Microcontroller Unit (MCU), and a Radio Frequency (RF) transceiver. This core board can be combined with different sensor or actor shields to increase the flexibility and re-usability. To ensure proper functionality of all crucial design blocks they are analyzed and simulated with state of the art techniques. First, the system requirements are laid out and explained in detail. The implementation that satisfies these requirements is presented and necessary simulations are discussed, the results are presented. To complete the work, measurements of the system are shown and compared with the simulation.\u0000","PeriodicalId":45093,"journal":{"name":"Advances in Radio Science","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2018-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43139084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Delayed response of the ionosphere to solar EUV variability 电离层对太阳极紫外线变率的延迟响应

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Advances in Radio Science Pub Date : 2018-09-04 DOI: 10.5194/ARS-16-149-2018

Erik Schmölter, J. Berdermann, N. Jakowski, C. Jacobi, Rajesh Vaishnav

{"title":"Delayed response of the ionosphere to solar EUV variability","authors":"Erik Schmölter, J. Berdermann, N. Jakowski, C. Jacobi, Rajesh Vaishnav","doi":"10.5194/ARS-16-149-2018","DOIUrl":"https://doi.org/10.5194/ARS-16-149-2018","url":null,"abstract":"Abstract. Physical and chemical processes in the ionosphere are driven by\u0000complex interactions with the solar radiation. The ionospheric plasma is in\u0000particular sensitive to solar EUV and UV variations with a time delay between\u0000one and two days. This delay is assumed to be related to thermospheric\u0000transport processes from the lower ionosphere to the F region. In previous\u0000analyses, the delay has been investigated using the F10.7 index. Here we\u0000present preliminary results of the ionospheric delay based on a comprehensive\u0000and reliable database consisting of GNSS TEC Maps and EUV spectral flux data.\u0000We plan to specify the various dependencies from geographic/geomagnetic\u0000location, altitude, season, local time, geophysical and solar radiation\u0000conditions such as the solar activity level. The first results for\u0000dependencies from seasons and wavelengths regions of the EUV are presented in\u0000this paper. These results can provide more insight into ionospheric processes\u0000and are of interest for applications dependent on reliable ionospheric\u0000weather forecasts, e.g. GNSS error analyses, prediction and mitigation.\u0000","PeriodicalId":45093,"journal":{"name":"Advances in Radio Science","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2018-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47146996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Influence of an Electrically Non-Conducting Heat Sink for Power Semiconductors on Radiated Interferences 非导电功率半导体散热器对辐射干扰的影响

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Advances in Radio Science Pub Date : 2018-09-04 DOI: 10.5194/ARS-16-117-2018

S. Chromy, Kai Rathjen, S. Fahlbusch, K. Hoffmann, S. Dickmann

{"title":"Influence of an Electrically Non-Conducting Heat Sink for Power Semiconductors on Radiated Interferences","authors":"S. Chromy, Kai Rathjen, S. Fahlbusch, K. Hoffmann, S. Dickmann","doi":"10.5194/ARS-16-117-2018","DOIUrl":"https://doi.org/10.5194/ARS-16-117-2018","url":null,"abstract":"Abstract. Power semiconductors are used in a growing number of applications.\u0000Furthermore, faster switching transients and therefore higher switching\u0000frequencies can be realised. This leads to higher radiated interferences at\u0000higher frequencies. In power electronic applications, often a cooling concept\u0000for the semiconductors is required to comply with the allowed temperature\u0000range. Typically, heat sinks are made of aluminium and their conductive\u0000behaviour can cause EMC problems. Via capacitive coupling, voltage transients\u0000are transferred from the power semiconductor to the heat sink, so that the\u0000heat sink behaves as an antenna and radiated interferences occur.\u0000Furthermore, a common mode current will appear if the heat sink is grounded.\u0000In this paper, a promising approach to reduce radiated interferences from the\u0000heat sink and solve the common mode issue by using an electrically isolating\u0000ceramic heat sink is presented. The influence of an aluminium nitride ceramic\u0000heat sink on cooling performance and EMC behaviour has been investigated. For\u0000this purpose, two geometrical identically heat sinks made from aluminium and\u0000aluminium nitride have been compared regarding thermal performance and\u0000radiated interferences characterised by S-parameters.\u0000","PeriodicalId":45093,"journal":{"name":"Advances in Radio Science","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2018-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45997151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Spectrum management and compatibility studies with Python 使用Python进行频谱管理和兼容性研究

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Advances in Radio Science Pub Date : 2018-05-29 DOI: 10.5194/ARS-16-177-2018

B. Winkel, A. Jessner

引用次数: 5

Comparison of digital beamforming algorithms for 3-D terahertz imaging with sparse multistatic line arrays 稀疏多静态线阵列的三维太赫兹成像数字波束形成算法比较

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Advances in Radio Science Pub Date : 2017-12-12 DOI: 10.5194/ARS-15-283-2017

B. Baccouche, Patrick Agostini, F. Schneider, W. Sauer-Greff, R. Urbansky, F. Friederich

引用次数: 8

Design of a carrier-depletion Mach-Zehnder modulator in 250 nm silicon-on-insulator technology 250nm绝缘体上硅技术中载流子耗尽Mach-Zehnder调制器的设计

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Advances in Radio Science Pub Date : 2017-12-05 DOI: 10.5194/ARS-15-269-2017

M. F. Rosa, L. Rathgeber, R. Elster, N. Hoppe, Thomas Fohn, Martin Schmidt, W. Vogel, M. Berroth

{"title":"Design of a carrier-depletion Mach-Zehnder modulator in 250 nm silicon-on-insulator technology","authors":"M. F. Rosa, L. Rathgeber, R. Elster, N. Hoppe, Thomas Fohn, Martin Schmidt, W. Vogel, M. Berroth","doi":"10.5194/ARS-15-269-2017","DOIUrl":"https://doi.org/10.5194/ARS-15-269-2017","url":null,"abstract":"Abstract. We present the design of a single-drive Mach-Zehnder modulator for amplitude modulation in silicon-on-insulator technology with 250 nm active layer thickness. The applied RF signal modulates the carrier density in a reverse biased lateral pn-junction. The free carrier plasma dispersion effect in silicon leads to a change in the refractive index. The modulation efficiency and the optical loss due to free carriers are analyzed for different doping configurations. The intrinsic electrical parameters of the pn-junction of the phase shifter like resistance and capacitance and the corresponding RC-limit are studied. A first prototype in this technology fabricated at the IMS CHIPS Stuttgart is successfully measured. The structure has a modulation efficiency of VπL = 3.1 V ⋅ cm at 2 V reverse bias. The on-chip insertion loss is 4.2 dB. The structure exhibits an extinction ratio of around 32 dB. The length of the phase shifter is 0.5 mm. The cutoff frequency of the entire modulator is 30 GHz at 2 V. Finally, an optimization of the doping structure is presented to reduce the optical loss and to improve the modulation efficiency. The optimized silicon optical modulator shows a theoretical modulation efficiency of VπL = 1.8 V ⋅ cm at 6 V bias and a maximum optical loss due to the free carrier absorption of around 3.1 dB cm−1. An ultra-low fiber-to-fiber loss of approximately 4.8 dB is expected using the state of the art optical components in the used technology.","PeriodicalId":45093,"journal":{"name":"Advances in Radio Science","volume":"15 1","pages":"269-281"},"PeriodicalIF":0.4,"publicationDate":"2017-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48244400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16

Design of a dual linear polarization antenna using split ring resonators at X-band X波段分环谐振腔双线偏振天线的设计

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Advances in Radio Science Pub Date : 2017-11-06 DOI: 10.5194/ARS-15-259-2017

Sadiq Ahmed, M. Chandra

{"title":"Design of a dual linear polarization antenna using split ring resonators at X-band","authors":"Sadiq Ahmed, M. Chandra","doi":"10.5194/ARS-15-259-2017","DOIUrl":"https://doi.org/10.5194/ARS-15-259-2017","url":null,"abstract":"Abstract. Dual linear polarization microstrip antenna configurations are very suitable for high-performance satellites, wireless communication and radar applications. This paper presents a new method to improve the co-cross polarization discrimination (XPD) for dual linear polarized microstrip antennas at 10 GHz. For this, three various configurations of a dual linear polarization antenna utilizing metamaterial unit cells are shown. In the first layout, the microstrip patch antenna is loaded with two pairs of spiral ring resonators, in the second model, a split ring resonator is placed between two microstrip feed lines, and in the third design, a complementary split ring resonators are etched in the ground plane. This work has two primary goals: the first is related to the addition of metamaterial unit cells to the antenna structure which permits compensation for an asymmetric current distribution flow on the microstrip antenna and thus yields a symmetrical current distribution on it. This compensation leads to an important enhancement in the XPD in comparison to a conventional dual linear polarized microstrip patch antenna. The simulation reveals an improvement of 7.9, 8.8, and 4 dB in the E and H planes for the three designs, respectively, in the XPD as compared to the conventional dual linear polarized patch antenna. The second objective of this paper is to present the characteristics and performances of the designs of the spiral ring resonator (S-RR), split ring resonator (SRR), and complementary split ring resonator (CSRR) metamaterial unit cells. The simulations are evaluated using the commercial full-wave simulator, Ansoft High-Frequency Structure Simulator (HFSS).","PeriodicalId":45093,"journal":{"name":"Advances in Radio Science","volume":"15 13","pages":"259-267"},"PeriodicalIF":0.4,"publicationDate":"2017-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41311556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Equivalent circuit simulation of HPEM-induced transient responses at nonlinear loads 非线性负载下hpem诱导瞬态响应的等效电路模拟

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Advances in Radio Science Pub Date : 2017-09-21 DOI: 10.5194/ARS-15-175-2017

M. Kotzev, Xiaotang Bi, M. Kreitlow, F. Gronwald

引用次数: 10

Physical Optics and full-wave simulations of transmission of electromagnetic fields through electrically large planar meta-sheets 物理光学和电磁场通过电大平面元片传输的全波模拟

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Advances in Radio Science Pub Date : 2017-09-21 DOI: 10.5194/ARS-15-29-2017

Ezgi Özis, A. Osipov, T. Eibert

引用次数: 2