发布求助
文献互助 智能选刊 最新文献

2015 International Workshop on Antenna Technology (iWAT)最新文献

筛选
英文 中文
Development of a semi-automatic effective diversity gain measurement system for multi-antenna systems 多天线系统分集增益半自动有效测量系统的研制
2015 International Workshop on Antenna Technology (iWAT) Pub Date : 2015-03-04 DOI: 10.1109/IWAT.2015.7365365
Bang-Yun Dai, Wen-Jiao Liao, Yi-Ane Chen, Xin-Xiong Chen
{"title":"Development of a semi-automatic effective diversity gain measurement system for multi-antenna systems","authors":"Bang-Yun Dai, Wen-Jiao Liao, Yi-Ane Chen, Xin-Xiong Chen","doi":"10.1109/IWAT.2015.7365365","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365365","url":null,"abstract":"Antenna diversity performance assessment measures are essential to multi-antenna systems. Among different evaluation metrics, the effective diversity gain is the ultimate ones since not only antenna characteristics but also environment factors are accounted. However, the conventional effective diversity gain measurement process is time consuming and labor intensive process. A semi-automatic measurement system is hence proposed in this work. Multiple antennas are connected to power detectors, which are controlled by a computer controlled AD/DA card. The system control program is coded in Labview. The whole system is mounted on a push cart. During the measurement process, the cart is moved manually in a multipath rich environment. Power levels received by antennas are recorded automatically. The proposed system can significantly reduce the time and labor required for the measurement. Measured data can be processed to yield the effective diversity gain of the tested multi-antenna system.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132858124","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
Circularly polarized antennas based on metamaterial transmission lines 基于超材料传输线的圆极化天线
2015 International Workshop on Antenna Technology (iWAT) Pub Date : 2015-03-04 DOI: 10.1109/IWAT.2015.7365345
Byung‐chul Park, Jeong‐Hae Lee
{"title":"Circularly polarized antennas based on metamaterial transmission lines","authors":"Byung‐chul Park, Jeong‐Hae Lee","doi":"10.1109/IWAT.2015.7365345","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365345","url":null,"abstract":"Two types of circularly polarized (CP) antennas based on metamaterial transmission lines will be presented. First, a dual-band omnidirectional circularly polarized (CP) antenna of epsilon negative (ENG) transmission lines (TLs) is introduced. The antenna is based on a circular mushroom structure with curved branches and designed without additional feeding parts for a 90° phase difference between two orthogonal modes as well as additional radiators for dual-band operations. A left-hand CP (LHCP) and a right-hand CP (RHCP) are obtained at the zeroth and the first order resonance modes, respectively. Second, a circularly polarized (CP) antenna based on mu-negative (MNG) transmission lines (TLs) is presented. The antenna consists of two pairs of resonators for two orthogonal polarizations. The 90° phase difference between them is achieved by detuning the corresponding resonance frequencies. The experimental results agree with the theoretical results.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"668 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131886984","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
LTE band capacitive coupling element antenna for smart phone devices 用于智能手机设备的LTE频段电容耦合元件天线
2015 International Workshop on Antenna Technology (iWAT) Pub Date : 2015-03-04 DOI: 10.1109/IWAT.2015.7365320
Yi-Ane Chen, Wen-Jiao Liao, Xin-Xiong Chen, Bang-Yun Dai
{"title":"LTE band capacitive coupling element antenna for smart phone devices","authors":"Yi-Ane Chen, Wen-Jiao Liao, Xin-Xiong Chen, Bang-Yun Dai","doi":"10.1109/IWAT.2015.7365320","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365320","url":null,"abstract":"In this work, a capacitive coupling elements antenna is proposed for handset devices. A dual-band matching network is employed to provide matching in the two LTE bands, Primary advantages of this antenna configuration include small sizes, simple structure, low cost, good radiation efficiencies and easy antenna tuning. The mechanisms for achieving low and high band matching at the same time are explained. The fabricated prototype validates its broad band and good radiation features. The proposed antenna configuration can be transport to other mobile platforms with little efforts.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123331592","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 microstrip composite right/left handed leaky-wave antenna using a stepped impedance resonator 采用阶跃阻抗谐振器的微带复合左/右漏波天线
2015 International Workshop on Antenna Technology (iWAT) Pub Date : 2015-03-04 DOI: 10.1109/IWAT.2015.7365377
Y. Kushiyama, T. Arima, T. Uno
{"title":"A microstrip composite right/left handed leaky-wave antenna using a stepped impedance resonator","authors":"Y. Kushiyama, T. Arima, T. Uno","doi":"10.1109/IWAT.2015.7365377","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365377","url":null,"abstract":"A composite right/left-handed (CRLH) leaky wave antenna using a stepped impedance resonator (SIR) is presented. By applying the SIR technique to a conventional CRLH structure, a balanced condition is achieved through adjustments of parameters of the SIR. Therefore, the structure requires no interdigital or multilayer capacitor to achieve a balanced condition. A differential microstrip geometry is also used for utilizing a virtual ground to remove grounded vias. The simplicity of the structure allows applications at higher frequencies. A leaky wave antenna consists of 14 unit cells of the proposed structure is designed. A continuous beam scanning capability from backward to forward direction is confirmed.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"296 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122087851","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
MIMO antennas for mobile phone applications 用于手机应用的MIMO天线
2015 International Workshop on Antenna Technology (iWAT) Pub Date : 2015-03-04 DOI: 10.1109/IWAT.2015.7365361
Wen‐Shan Chen, Chun-Lin Ciou, Kuan-Hsun Lai
{"title":"MIMO antennas for mobile phone applications","authors":"Wen‐Shan Chen, Chun-Lin Ciou, Kuan-Hsun Lai","doi":"10.1109/IWAT.2015.7365361","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365361","url":null,"abstract":"In the article, A planar structure of multiple input multiple output (MIMO) antennas of mobile applications is presented and discussed. The two antennas are a coupled-fed loop antenna on the top and a monopole antenna on the bottom side. The MIMO antennas are located on the two edges of the ground plane. A pairs of meandered slits are used to improve impedance match of the two antennas. The proposed MIMO antennas with planar structure and acceptable performance are suitable for applying in WWAN/LTE application.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123937990","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
Terahertz antennas and related optical components 太赫兹天线及相关光学元件
2015 International Workshop on Antenna Technology (iWAT) Pub Date : 2015-03-04 DOI: 10.1109/IWAT.2015.7365265
G. Chattopadhyay
{"title":"Terahertz antennas and related optical components","authors":"G. Chattopadhyay","doi":"10.1109/IWAT.2015.7365265","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365265","url":null,"abstract":"Millimeter- and submillimeter-wave imaging systems for astronomy, planetary, and Earth science applications are increasingly moving towards large focal plane arrays. The relatively long wavelengths together with focal ratios encountered imply mm-sized pixels, and when one considers arrays with a hundred to thousands of pixels, we have to deal with optical elements of quite substantial size. In many applications, geometry makes lenses far more attractive than mirrors, and since cryogenic detectors are invariably employed, ground-based systems as well as testing of space-based systems require vacuum windows 10s of cm in diameter. Especially at shorter wavelengths, very low loss materials are required since the thickness of lenses and windows is substantial, reaching several cm. Crystal quartz can be used in some cases, but available diameters are limited to 12 cm. The anisotropy of the material can be harmful in many situations as well.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122590726","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
Wireless power transfer to a pacemaker by using metamaterials and Yagi-Uda antenna concept 利用超材料和Yagi-Uda天线概念将无线电力传输到起搏器
2015 International Workshop on Antenna Technology (iWAT) Pub Date : 2015-03-04 DOI: 10.1109/IWAT.2015.7365283
Rupam Das, H. Yoo
{"title":"Wireless power transfer to a pacemaker by using metamaterials and Yagi-Uda antenna concept","authors":"Rupam Das, H. Yoo","doi":"10.1109/IWAT.2015.7365283","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365283","url":null,"abstract":"Wireless power transfer (WPT) to medical implants allows clinicians to avoid using bulky energy storage components. In this paper, we address WPT systems for a pacemaker (PM). A resonant inductive coupling method was employed in the WPT system by introducing a spiral transmitter (Tx) coil and a spiral receiver (Rx) coil. Here, we introduced the concept of the Yagi-Uda antenna by using metamaterials (MTMs) in order to increase WPT efficiency in the Medical Implanted Communication Service (MICS). Based on the simulation results in a realistic model of the human body, we were able to design a compact and efficient WPT system for PMs. Moreover, our simulation results showed that the Yagi-Uda antenna configuration can significantly increase WPT efficiency.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125056504","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
A novel dual-padlock UWB antenna system 一种新型双挂锁超宽带天线系统
2015 International Workshop on Antenna Technology (iWAT) Pub Date : 2015-03-04 DOI: 10.1109/IWAT.2015.7365355
Raluca E. Topor, R. Tamas
{"title":"A novel dual-padlock UWB antenna system","authors":"Raluca E. Topor, R. Tamas","doi":"10.1109/IWAT.2015.7365355","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365355","url":null,"abstract":"This paper presents a new Ultra-Wide Band antenna system for direction finding applications. It consists of two orthogonal half-ring antennas with an unbalanced input. The antenna system was characterized by using energy-based descriptors, as pulsed excitations are considered. A new energy-based coupling parameter was defined in order to quantify the mutual coupling. The experimental results are close to the simulated data, both for frequency-domain and energy-based descriptors.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125326129","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
Sensitivity of negative impedance converter circuit with respect to PCB design effects 负阻抗转换电路的灵敏度对PCB设计效果的影响
2015 International Workshop on Antenna Technology (iWAT) Pub Date : 2015-03-04 DOI: 10.1109/IWAT.2015.7365335
L. Batel, L. Rudant, J. Pintos, K. Mahdjoubi
{"title":"Sensitivity of negative impedance converter circuit with respect to PCB design effects","authors":"L. Batel, L. Rudant, J. Pintos, K. Mahdjoubi","doi":"10.1109/IWAT.2015.7365335","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365335","url":null,"abstract":"Performance characteristics of Electrically Small Antennas are limited by fundamental physics. Using Non-Foster elements into antennas structures appears like an opportunity to overshoot those limits. In this paper, a Negative Impedance Converter circuit is designed for antenna applications at 868 MHz. These active circuits, that produce Non-Foster negative capacitance or inductance, are known as sensitive circuits due to their nonlinearities that can produce instabilities. Thus, designing Negative Impedance Converters at Ultra High Frequency bands becomes quite challenging. Accurate design is strongly recommended to predict the final behavior of the circuit. The Negative Impedance Converter sensitivity is investigated with respect to Printed Circuit Board design through both simulation and measurement results.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116736615","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: 11
Design of thin microwave absorbers using capacitive screen 电容屏薄型微波吸收器的设计
2015 International Workshop on Antenna Technology (iWAT) Pub Date : 2015-03-04 DOI: 10.1109/IWAT.2015.7365373
Jun-Ho Lee, Bomson Lee
{"title":"Design of thin microwave absorbers using capacitive screen","authors":"Jun-Ho Lee, Bomson Lee","doi":"10.1109/IWAT.2015.7365373","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365373","url":null,"abstract":"A microwave absorber with a layer depth less than a quarter wavelength is investigated based on an equivalent circuit. For a specific absorber with a given layer electrical length, the equivalent resistance and capacitance of a capacitive screen can be determined using the presented closed-form design equations. The relation between the layer depth and absorption bandwidth is also analyzed. The presented formulation is validated by a design example in the ISM band. A unit of the absorber screen is realized using a resistive rectangular structure with surrounding gaps. The absorber is shown to offer a 90% absorption bandwidth from 2.3GHz to 5.1GHz (93%) with layer depth of 1/8 wavelength.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"83 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121325504","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
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信