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2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)最新文献

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Dielectric resonator nano-antennas: A pathway to efficient optical antennas 介质谐振纳米天线:通向高效光学天线的途径
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958660
C. Fumeaux, L. Zou, W. Withayachumnankul
{"title":"Dielectric resonator nano-antennas: A pathway to efficient optical antennas","authors":"C. Fumeaux, L. Zou, W. Withayachumnankul","doi":"10.1109/IWAT.2014.6958660","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958660","url":null,"abstract":"The tremendous advances in nano-fabrication techniques in the last decades have opened huge opportunities for the creation of structures that manipulate light at sub-wavelength scales. In particular, the development of resonant “optical antennas” has evolved from being scientific curiosities, e.g. the infrared antennas of the 1990's [1], to become a hot topic of research today [2]. Optical antennas usually concentrate fields from an incident free-space wave into a very small area (feed), or act as resonant scatterers in an array configuration. They open new perspectives with promising applications in sub-diffraction sensing, spectroscopy, lightemission, solar power collection, or on-chip communications. They also allow the realization of flat nano-structured optical components inspired from microwave technologies such as reflectarrays, lens-arrays or frequency-selective surfaces.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"R-26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126622107","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
Dual-mode wearable antenna for on-/off-body wireless communications 双模可穿戴天线，用于体内/体外无线通信
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958665
Chia-Hsien Lin, K. Ito
{"title":"Dual-mode wearable antenna for on-/off-body wireless communications","authors":"Chia-Hsien Lin, K. Ito","doi":"10.1109/IWAT.2014.6958665","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958665","url":null,"abstract":"Body-Centric Wireless Communications (BCWCs) using wearable wireless devices are received an increasing amount of attention due to wide applications such as medical care system, identification system, smart home and entertainment. In this paper, we proposed a wearable dual-mode (on-/off-body modes) antenna for medical care system. In this paper, electric field distribution is analyzed for the on-body mode and reflection coefficient (S11) and radiation patterns are discussed for the off-body mode.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"290 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122822962","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: 5
Design of a all-fabric higher order mode circular patch antenna for Wireless body area network application 用于无线体域网络的全结构高阶模圆形贴片天线设计
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958587
J. Tak, Jaehoon Choi
{"title":"Design of a all-fabric higher order mode circular patch antenna for Wireless body area network application","authors":"J. Tak, Jaehoon Choi","doi":"10.1109/IWAT.2014.6958587","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958587","url":null,"abstract":"A all-fabric higher order mode circular patch antenna for Wireless body area network is proposed. The proposed higher order mode patch antenna has the maximum radiation direction along the body surface for on-body communication in the industrial, scientific, and medical 2.45 GHz band. In order to accomplish the low profile property, the proposed antenna used shorting posts to excite TM31 mode at 2.45 GHz ISM band. The proposed antenna was manufactured with fabric materials (conductive fabric, conductive thread, conductive epoxy and felt) and has a compact size. The proposed antenna has 28 mm (0.23 λ0) of a radius and 2 mm (0.016 λ0) of a thickness.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130022879","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
A spectrally efficient chipless RFID tag based on split-wheel resonator 一种基于分轮谐振器的无芯片射频识别标签
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958582
Md. Shakil Bhuiyan, N. Karmakar
{"title":"A spectrally efficient chipless RFID tag based on split-wheel resonator","authors":"Md. Shakil Bhuiyan, N. Karmakar","doi":"10.1109/IWAT.2014.6958582","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958582","url":null,"abstract":"A completely passive, compact and fully printable chipless RFID tag is proposed. The tag utilizes the scattering from an array of orthogonally polarized split-wheel resonator pairs to achieve multi-bit data capacity. As split-wheel resonators of identical resonance frequency but with orthogonal polarizations do not interfere with each other in their first mode of resonance, this allows realization of the same frequency band twice, once for each polarization, to encode information, thus enhancing the overall spectral efficiency of the proposed tag. When interrogated with broadband plane wave signals of two orthogonal polarizations, the reader detects the RCS peaks generated by each of the resonator pairs in both x- and y-polarizations and with n resonator pairs, effectively 22n-1 items can be tagged and identified. As the tags require only single sided metallization, direct printing of such tags using conductive ink on paper or polymer substrate can yield a ubiquitous electronic tagging method which can replace optical barcode in the future.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127023491","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: 21
Microwave-based system using directional wideband antennas for head imaging 基于微波的定向宽带天线头部成像系统
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958667
A. Abbosh
{"title":"Microwave-based system using directional wideband antennas for head imaging","authors":"A. Abbosh","doi":"10.1109/IWAT.2014.6958667","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958667","url":null,"abstract":"Recent advances indicate that microwave-based imaging systems have the potential to be used for different medical applications, such as head imaging. This application is specifically important for fast brain stroke detection. It is shown in this paper that a system designed to operate across the band from 1-4 GHz achieves satisfactory imaging results of the brain. The system uses an array of directional antennas that have corrugated tapered slot structures. Details of the system with some initial results in addition to the technical challenges facing that system are explained.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127813034","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
Optimal design of antenna arrays 天线阵列的优化设计
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958621
W. Geyi
{"title":"Optimal design of antenna arrays","authors":"W. Geyi","doi":"10.1109/IWAT.2014.6958621","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958621","url":null,"abstract":"A universal method for the optimal design of antenna arrays is introduced in this paper. The method is based on the optimization of the power transmission efficiency between the antenna array to be designed and a test antenna array whose elements are placed in the desired directions in which radiations need to be maximized. The optimized distribution of excitations for the antenna array is determined by an eigenvalue equation derived from the Rayleigh quotient for the power transmission efficiency. The method is applicable to any type of antenna array. To demonstrate its validity, different antenna arrays for various applications have been designed using the proposed method.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129154226","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: 17
Tunable, switchable, and one-way electromagnetic wave absorbers based on metamaterial structures 基于超材料结构的可调谐、可切换和单向电磁波吸收器
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958659
Yijun Feng, Bo O. Zhu, Junming Zhao, H. Yuan, Liang Sun, T. Jiang
{"title":"Tunable, switchable, and one-way electromagnetic wave absorbers based on metamaterial structures","authors":"Yijun Feng, Bo O. Zhu, Junming Zhao, H. Yuan, Liang Sun, T. Jiang","doi":"10.1109/IWAT.2014.6958659","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958659","url":null,"abstract":"Recently metamaterials have been employed to construct electromagnetic (EM) wave absorbers [1]. The idea of metamaterial absorber is to adjust the effective permittivity and permeability independently by varying the dimensions of electric and magnetic resonant components in the unit cell so as to match the effective impedance of the absorber to free space and achieve a large resonant dissipation at the meantime. Thus, wave transmission and reflection are minimized simultaneously and absorption is maximized. Although metamaterial absorber has relatively narrow bandwidth, it possesses many advantages such as high absorption, low density, and thin electric thickness. Moreover, the frequency response can be tailored or scaled from microwave to terahertz and infrared regimes through carefully designing the constituent resonant structures. Since the EM performance of the metamaterial absorber is entirely determined by the resonant structure in the unit cell, it is possible to change or control the absorber performance by incorporating active elements into the resonant unit cell [2-3]. In this presentation, we will report on several controllable metamaterial absorbers that are realized by integrating resonant unit cell structure with microwave varactors or diodes, as well as a one-way microwave energy absorber based on a composite metamaterial structure including chiral structure. These metamaterial absorbers with tunable, switchable or one-way performances could find application in many functional devices for manipulation of the EM wave propagation and the design concept could also be scaled to other frequency band such as terahertz or optical range.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129351641","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
Movement based time division multiplexing for near real time feedback body area network applications 基于运动的时分复用近实时反馈体域网络应用
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958585
Haider A. Sabti, D. Thiel
{"title":"Movement based time division multiplexing for near real time feedback body area network applications","authors":"Haider A. Sabti, D. Thiel","doi":"10.1109/IWAT.2014.6958585","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958585","url":null,"abstract":"A time division multiplexed coding system was designed and tested for a body-centric star network using a wireless node mounted in six different places in different time lots on the arm and leg and a central node (hub) on the chest during running. The proposed network allows a coordinated approach to gait analysis. The time sequence for communications between the wireless nodes and the hub is set during the first few steps as runners have different styles and can run at different speeds. After calibration the central unit sends a synchronization pulse during every running step and sets a unique transmission time window for each individual node. The time windows are scheduled when there is reliable communications between the hub and the sensor nodes around the body. Accelerometers on each node are used to identify these time windows for the diverse angles of rotation of the human limbs during running.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127140450","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: 5
Design of finite FSS-backed reflectarray by using BDP-CG method 用BDP-CG方法设计有限fss背反射镜
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958636
K. Konno, Qiang Chen, S. Kameda, N. Suematsu
{"title":"Design of finite FSS-backed reflectarray by using BDP-CG method","authors":"K. Konno, Qiang Chen, S. Kameda, N. Suematsu","doi":"10.1109/IWAT.2014.6958636","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958636","url":null,"abstract":"A fast design method of the finite FSS-backed reflectarray is presented. In the design method, induced electromotive force (EMF) method is used for calculating self/mutual impedance between linear elements. Resultant matrix equation is solved by a block diagonal preconditioned-conjugate gradient (BDP-CG) method, not by a conventional direct solver. Because the number of iterations can be saved by the BDP, total CPU time of the BDP-CG method becomes much small compared with that of the conventional direct solver. As a result, total CPU time for the design of reflectarray backed by finite FSS can be saved by using the design method. Numerical example shows the performance of the design method.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127328421","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
Design and measurement of W-band offset stepped parabolic reflector antennas for airport surface foreign object debris detection radar systems 机场表面异物探测雷达系统w波段偏移阶跃抛物面反射面天线的设计与测量
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958593
S. Futatsumori, K. Morioka, A. Kohmura, N. Yonemoto
{"title":"Design and measurement of W-band offset stepped parabolic reflector antennas for airport surface foreign object debris detection radar systems","authors":"S. Futatsumori, K. Morioka, A. Kohmura, N. Yonemoto","doi":"10.1109/IWAT.2014.6958593","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958593","url":null,"abstract":"Debris on the airport surface may cause severe damage to aircraft. To detect these obstacles, foreign object debris (FOD) detection systems have been developed recently. By utilizing high-sensibility and weather robustness characteristics, the millimeter-wave radar is an essential sensor device for these systems. This paper discusses an offset parabolic reflector antenna for airport surface FOD detection radar systems. Firstly, the overview of the FOD detection radar systems, which employs a band of between 92 GHz and 100 GHz, is shown. For the azimuth beam scanning antenna, the antenna is required to achieve both a narrow azimuth beamwidth and a wide elevation beamwidth. Secondly, the stepped parabolic reflector is newly designed to obtain an 8 degree elevation -20 dB down power beamwidth. Finally, the designed reflector is fabricated based on chemical wood materials. The measured result shows the 38 dBi gain and the 8.4 degree beamwidth for the elevation plane.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128154598","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: 9
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