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2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)最新文献

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Improvement of shadowing with Iterative Physical Optics for radiation pattern of mounted antennas 用迭代物理光学改进天线辐射方向图的遮蔽
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/antem.2014.6887701
A. Thomet, G. Kubické, C. Bourlier, P. Pouliguen
{"title":"Improvement of shadowing with Iterative Physical Optics for radiation pattern of mounted antennas","authors":"A. Thomet, G. Kubické, C. Bourlier, P. Pouliguen","doi":"10.1109/antem.2014.6887701","DOIUrl":"https://doi.org/10.1109/antem.2014.6887701","url":null,"abstract":"Modeling interactions between antennas and structures is an important challenge for systems carrying antennas such as aircrafts, satellites, frigates. This paper focuses on the electromagnetic field propagated by an antenna interacting with a structure that includes effects of shadowing and multiple reflections. In such a case, several method can be used, and Iterative Physical Optics (IPO) is an asymptotic method based on Physical Optics (PO), which has shown good results in calculation of electromagnetic diffraction in open-ended cavities. In IPO, different techniques can be used to take into account shadowing effects. First method, classically used, is a geometrical way of considering shadowing, based on ray bouncing. A more recent method uses a physical approach, based on shadow radiation (around forward direction) with PO approximation. The idea of this paper is to use IPO method to determine electromagnetic field from a structure including an antenna on a large complex platform, comparing different ways of considering shadowing effect.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"116 13","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120851635","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: 1
A constant beamwidth reflector antenna for a harmonic radar operating in the near-field 用于近场谐波雷达的恒定波束宽度反射天线
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887680
H. Aumann, N. Emanetoglu
{"title":"A constant beamwidth reflector antenna for a harmonic radar operating in the near-field","authors":"H. Aumann, N. Emanetoglu","doi":"10.1109/ANTEM.2014.6887680","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887680","url":null,"abstract":"A dual-frequency constant beamwidth reflector antenna for use with a harmonic radar in the focused near-field is proposed. The technique matches reflector defocusing effects to the frequency dependent phase center displacement of a log-period dipole antenna feed by specifying the LPDA apex angle. The technique was verified by simulations and measurements.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123305525","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
Self-assembled helical microstructures for millemeter-wave helical antennas 毫米波螺旋天线的自组装螺旋微结构
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887669
Sae-Won Lee, M. Parameswaran, R. Vaughan
{"title":"Self-assembled helical microstructures for millemeter-wave helical antennas","authors":"Sae-Won Lee, M. Parameswaran, R. Vaughan","doi":"10.1109/ANTEM.2014.6887669","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887669","url":null,"abstract":"New microfabrication techniques allow the creation of miniaturized antennas, including for use at frequencies well beyond 60 GHz. An advantage of using microfabrication is the ability to batch-process a large quantity of antennas, which can include electrically large arrays. We report the use of a unique micro-electro-mechanical systems (MEMS) fabrication process to make helical microstructures to be used as antennas after metallization. The fabrication process enables self-assembly of planar structures into three-dimensional structures during processing. Helices with different numbers of turns, handedness, and conductor widths are fabricated from spiral structures with the self-assembly. The layout, designing and fabrication method presented here allows fabrication of arrays or even multiple elements with different design parameters, on a physically small footprint.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130031985","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: 1
Wideband highly-efficient transparent/miniaturized antennas using clear colorless acrylic sheets for space/WLAN applications 宽带高效透明/小型化天线，采用透明无色亚克力片，用于空间/WLAN应用
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887677
A. Rashidian, L. Shafai
{"title":"Wideband highly-efficient transparent/miniaturized antennas using clear colorless acrylic sheets for space/WLAN applications","authors":"A. Rashidian, L. Shafai","doi":"10.1109/ANTEM.2014.6887677","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887677","url":null,"abstract":"Two novel resonator antennas are proposed for space/WLAN applications. The whole antenna system including substrate and resonator element is realized using clear colorless acrylic sheets. The first antenna is over 90% optically transparent and covers the entire Ku frequency band for satellite communications. By changing the boundary conditions using metallic plates, the second plastic antenna with significant size reduction is achieved to operate at 5-6 GHz frequency band for WLAN applications.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"239 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121433729","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
Discontinuous-Galerkin microwave imaging 不连续伽辽金微波成像
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887655
I. Jeffrey, A. Zakaria, J. Lovetri
{"title":"Discontinuous-Galerkin microwave imaging","authors":"I. Jeffrey, A. Zakaria, J. Lovetri","doi":"10.1109/ANTEM.2014.6887655","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887655","url":null,"abstract":"We develop a high-order contrast source inversion method for solving the inverse scattering problem in electromagnetics. To decouple inversion from the mesh discretization, the algorithm supports high-order expansions for the fields, contrast and contrast sources on each element. The forward solver is a time-harmonic discontinuous Galerkin method formulated for Maxwell's curl equations and is sufficiently general to easily model a variety of imaging environments. Numerical and experimental results for transverse magnetic inversion are presented.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122767143","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: 1
Application of cognitive radio principles to wireless channel sounding 认知无线电原理在无线信道测深中的应用
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887672
R. White, D. Michelson
{"title":"Application of cognitive radio principles to wireless channel sounding","authors":"R. White, D. Michelson","doi":"10.1109/ANTEM.2014.6887672","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887672","url":null,"abstract":"Channel sounding is generally conducted under the assumption that the wireless channel is free from interfering signals, i.e., in clear channels. As regulators begin to deploy new services in spectrum that is already occupied by other services, channel sounding must often be conducted in occupied channels with all the obvious attendant difficulties. Here, we propose alternative sense-decide-act strategies based upon cognitive radio principles that can mitigate interference when a conventional vector network analyzer is used to collect swept-frequency measurements of static channels. We show that a three-step process involving: 1) the use of sensing to reduce the probability that the channel sounder will interfere with a transmission that is underway, 2) robust estimation to eliminate outliers due to measurements corrupted by transmissions that began while the measurement was underway, and 3) estimation of the number of samples required to yield estimates of the channel response that fall within an acceptable confidence interval. Implementation of the scheme using an Agilent E8362C PNA vector network analyzer augmented by an external sensing receiver and control software yields pristine channel measurements even in the presence of significant interference.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126387674","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
Wafer-level waveguide filter realization using simplied 3D fabricaiton process 采用简化的三维制造工艺实现晶圆级波导滤波器
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887658
M. Nosrati, N. Vahabisani, M. Daneshmand
{"title":"Wafer-level waveguide filter realization using simplied 3D fabricaiton process","authors":"M. Nosrati, N. Vahabisani, M. Daneshmand","doi":"10.1109/ANTEM.2014.6887658","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887658","url":null,"abstract":"This paper discusses a new technique to realize a wafer-level band-pass waveguide filter. The proposed waveguide takes advantage of a newly developed 3D fabrication process that enables realization of waveguide structures on wafer-level. The waveguide filter can be constructed on top of the substrate, making it independent of the substrate material. The proposed structure is suitable for millimeter-waves applications.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126970919","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
High-gain Bow-tie antenna array using low-index metamaterial 采用低折射率超材料的高增益领结天线阵列
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887713
A. Dadgarpour, B. Zarghooni, T. Denidni
{"title":"High-gain Bow-tie antenna array using low-index metamaterial","authors":"A. Dadgarpour, B. Zarghooni, T. Denidni","doi":"10.1109/ANTEM.2014.6887713","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887713","url":null,"abstract":"This paper presents the design and simulation of high-gain Bow-tie array antenna working at millimeter-waves (57-64 GHz). By loading a low-index metmaterial unit-cell in front of a bow-tie end-fire antenna, and double G-shaped unit-cell at the back of antenna, the antenna parameters, such as the gain, front-to back ratio, and side-lobe level are significantly improved. Simulation results indicate that the gain of 1×2 antenna varies from 11.8-12.7 dB over frequency range of 57-64 GHz while the dimension of array antenna is 13.3×12.2×0.5 mm3.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132563668","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: 3
A novel terrestrial local positioning technique using transmitting multi-frequency antenna array 一种基于发射多频天线阵的地面局部定位新技术
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887712
M. Fard, P. Mousavi, A. Rezaie
{"title":"A novel terrestrial local positioning technique using transmitting multi-frequency antenna array","authors":"M. Fard, P. Mousavi, A. Rezaie","doi":"10.1109/ANTEM.2014.6887712","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887712","url":null,"abstract":"Finding the location of a mobile agent has been long an issue of interest for many applications. Many techniques have been introduced for local position estimation which are usually based on array concept and typically apply either of frequency or phase variation methods. Arrays are usually used in the receiver side and the problem is to find the position of the transmitter. In this study, a new Line-of-Sight (LOS) technique for location finding is introduced in which unlike conventional array problems, the antenna array is moved to the transmitter side. In addition, both frequency and phase deviations are applied.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132440841","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
Slotted waveguide arrays for collecting near-field scattering data 用于近场散射数据采集的开槽波导阵列
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887711
M. Ostadrahimi, K. Nemez, J. Lovetri, L. Shafai, S. Pistorius
{"title":"Slotted waveguide arrays for collecting near-field scattering data","authors":"M. Ostadrahimi, K. Nemez, J. Lovetri, L. Shafai, S. Pistorius","doi":"10.1109/ANTEM.2014.6887711","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887711","url":null,"abstract":"We introduce a novel system for collecting near-field scattering data. The system utilizes a combination of rectangular waveguides and printed-circuit-boards, consisting of several field collection slots. Data collection is based on the modulated scattering technique. A prototype system using four waveguides was fabricated and tested in both air and water. Simulation and measurement results show that the system can detect field changes at the slot locations.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124152290","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
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