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2011 International Workshop on Antenna Technology (iWAT)最新文献

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Microstrip-fed hybrid slot and strip antenna for multi-band handset applications 用于多波段手机应用的微带馈电混合槽带天线
2011 International Workshop on Antenna Technology (iWAT) Pub Date : 2011-03-07 DOI: 10.1109/IWAT.2011.5752355
You-Chieh Chen, Hsun-Pin Chang, P. Hsu
{"title":"Microstrip-fed hybrid slot and strip antenna for multi-band handset applications","authors":"You-Chieh Chen, Hsun-Pin Chang, P. Hsu","doi":"10.1109/IWAT.2011.5752355","DOIUrl":"https://doi.org/10.1109/IWAT.2011.5752355","url":null,"abstract":"A microstrip-fed hybrid slot and strip antenna for multi-band handset applications is proposed. The antenna is composed of three monopole slots and two parasitic strips with a small antenna area of 16 × 40 mm2. The bandwidth of this antenna can cover most of the mobile bands from 0.8 to 6 GHz frequency range including GSM850/900/GPS/DCS/PCS/UMTS/WiMAX 2.6/3.5 GHz and WLAN 2.4/5 GH bands.","PeriodicalId":330623,"journal":{"name":"2011 International Workshop on Antenna Technology (iWAT)","volume":"15 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115606969","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
Terahertz photoconductive antenna efficiency 太赫兹光导天线效率
2011 International Workshop on Antenna Technology (iWAT) Pub Date : 2011-03-07 DOI: 10.1109/IWAT.2011.5752384
Yi Huang, N. Khiabani, Yao-chun Shen, Di Li
{"title":"Terahertz photoconductive antenna efficiency","authors":"Yi Huang, N. Khiabani, Yao-chun Shen, Di Li","doi":"10.1109/IWAT.2011.5752384","DOIUrl":"https://doi.org/10.1109/IWAT.2011.5752384","url":null,"abstract":"Terahertz (THz) photoconductive antennas are the most common device for the generation and detection of THz waves and are very different from conventional RF/microwave antennas. One of the major problems of the current photoconductive antennas is that the antenna efficiency is very low, thus it is difficult to obtain high power THz waves. In this paper a comparison of the conventional and photoconductive antennas is made and various parameters and aspects of photoconductive antennas are examined with the aim to maximise its efficiency factor. A new antenna efficiency expression is derived which clearly shows how the efficiency is linked to various parameters. An example is used to demonstrate why the total efficiency is very low and what the major limiting factors are. Recommendations for how to increase the efficiency are presented.","PeriodicalId":330623,"journal":{"name":"2011 International Workshop on Antenna Technology (iWAT)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115634757","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: 54
A circularly polarized planar and slender antenna using helical element and back conductor 采用螺旋元件和背导体的圆极化平面细长天线
2011 International Workshop on Antenna Technology (iWAT) Pub Date : 2011-03-07 DOI: 10.1109/IWAT.2011.5752286
T. Fukusako, Ye Zhang, K. Ide
{"title":"A circularly polarized planar and slender antenna using helical element and back conductor","authors":"T. Fukusako, Ye Zhang, K. Ide","doi":"10.1109/IWAT.2011.5752286","DOIUrl":"https://doi.org/10.1109/IWAT.2011.5752286","url":null,"abstract":"A circularly polarized slender shaped helical antenna is presented. The helical antenna can generate circular polarization (CP) in the normal direction to the helical axias under a condition of structural parameters. However, when a planar and slender antenna shape is required, it may be difficult to satisfy the condition. In the proposed antenna, the ratio of the thickness : vertical : horizontal sides is approximately 1:2:8 which has been obtained generating circular polarization using a back conductor. The back conductor is installed at a close position behind the helical element using a capacitive feed structure in order to keep a low-profile structure. This antenna can be resonated at around 1 GHz with the size satisfying k0 a=0.35 (k0: wave mumber at the resonance frequency, a:radius of a hypothetical sphere circumferencing the antenna). Reasonable agreements have been obtained between simulated and measured results in S11, axial ratio, and radiation pattern.","PeriodicalId":330623,"journal":{"name":"2011 International Workshop on Antenna Technology (iWAT)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126723079","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
Recent progress in antennas with an EBG reflector and antennas with periodically arrayed loops EBG反射面天线和周期性阵环天线的研究进展
2011 International Workshop on Antenna Technology (iWAT) Pub Date : 2011-03-07 DOI: 10.1109/IWAT.2011.5752378
H. Nakano, H. Oyanagi, J. Miyake, Y. Oishi, J. Yamauchi
{"title":"Recent progress in antennas with an EBG reflector and antennas with periodically arrayed loops","authors":"H. Nakano, H. Oyanagi, J. Miyake, Y. Oishi, J. Yamauchi","doi":"10.1109/IWAT.2011.5752378","DOIUrl":"https://doi.org/10.1109/IWAT.2011.5752378","url":null,"abstract":"A low-profile curl antenna with an EBG reflector has a relatively wide input impedance bandwidth. Low-profile equiangular- and Archimedean-spiral antennas, each backed by an EBG reflector, have a wider input impedance bandwidth than the curl. A low-profile inverted F antenna above an EBG reflector radiates a tilted beam. An array composed of inverted F antennas combined with switching circuits has a beam that can be scanned. A layer of periodically arrayed loops transforms the axial beam of an antenna into a tilted beam with high directivity.","PeriodicalId":330623,"journal":{"name":"2011 International Workshop on Antenna Technology (iWAT)","volume":"282 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116087591","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
The Method of Moments at IR and optical frequencies 红外和光学频率的矩量法
2011 International Workshop on Antenna Technology (iWAT) Pub Date : 2011-03-07 DOI: 10.1109/IWAT.2011.5752374
G. Vandenbosch, V. Volski, N. Verellen, V. Moshchalkov
{"title":"The Method of Moments at IR and optical frequencies","authors":"G. Vandenbosch, V. Volski, N. Verellen, V. Moshchalkov","doi":"10.1109/IWAT.2011.5752374","DOIUrl":"https://doi.org/10.1109/IWAT.2011.5752374","url":null,"abstract":"In the last 40 years the Method of Moments has been a cornerstone in the field of computational electromagnetics. Traditionally, this method has been used to solve integral equations formulated for antennas and other components in the RF and microwave frequency range. In this paper, the applicability, advantages and disadvantages of this method are discussed in view of applying it at IR and optical frequencies.","PeriodicalId":330623,"journal":{"name":"2011 International Workshop on Antenna Technology (iWAT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129661325","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
Study of new magneto-dielectric substrate for compact antenna application 小型天线用新型磁介质基板的研究
2011 International Workshop on Antenna Technology (iWAT) Pub Date : 2011-03-07 DOI: 10.1109/IWAT.2011.5752347
Kihun Chang, Haojun Zhu, Xiaokai Zhang, H. Xin
{"title":"Study of new magneto-dielectric substrate for compact antenna application","authors":"Kihun Chang, Haojun Zhu, Xiaokai Zhang, H. Xin","doi":"10.1109/IWAT.2011.5752347","DOIUrl":"https://doi.org/10.1109/IWAT.2011.5752347","url":null,"abstract":"This paper presents investigation on a new type of magneto-dielectric substrate for compact antenna application. The magneto-dielectric polymer material studied has tailored magnetic permeability and dielectric permittivity that are beneficial for many microwave applications. Microstrip patch antenna designs are used to evaluate the material. Our simulation and measurement results indicate that this new type of magneto-dielectric materials may be very useful in antenna applications and lead to compact and wideband antennas. Technique to reduce loss in this kind of materials will also be discussed.","PeriodicalId":330623,"journal":{"name":"2011 International Workshop on Antenna Technology (iWAT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130514765","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
Compact UWB notch filter parasitic microstrip antenna 紧凑型超宽带陷波滤波器寄生微带天线
2011 International Workshop on Antenna Technology (iWAT) Pub Date : 2011-03-07 DOI: 10.1109/IWAT.2011.5752328
D. Rajesh, P. K. Sahu
{"title":"Compact UWB notch filter parasitic microstrip antenna","authors":"D. Rajesh, P. K. Sahu","doi":"10.1109/IWAT.2011.5752328","DOIUrl":"https://doi.org/10.1109/IWAT.2011.5752328","url":null,"abstract":"In this paper, a low-cost compact microstrip line-fed antenna with parasitic patches resulting Wide-band characteristics with a band dispensation is presented. The antenna was implemented on FR4 substrate with a thickness of 1.6 mm and relative permittivity of 4.4. It has a partial ground plane. This antenna is exited by a microstrip-line feed. The return loss is less than −10 dB in 3.7 GHz-11.6 GHz frequency range with Possible UWB application. The proposed antenna is also simulated with band notch in 5 GHz-6 GHz frequency range by introducing an inverted U shape slot. The return loss results and radiation pattern plots of the antenna are included in this paper. The performance characteristics of the proposed antenna are simulated using CST microwave studio 2008 software.","PeriodicalId":330623,"journal":{"name":"2011 International Workshop on Antenna Technology (iWAT)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130683253","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
Overview of multiple antenna designs for handheld devices and base stations 手持设备和基站的多天线设计概述
2011 International Workshop on Antenna Technology (iWAT) Pub Date : 2011-03-07 DOI: 10.1109/IWAT.2011.5752392
Chi-Yuk Chiu, R. Murch
{"title":"Overview of multiple antenna designs for handheld devices and base stations","authors":"Chi-Yuk Chiu, R. Murch","doi":"10.1109/IWAT.2011.5752392","DOIUrl":"https://doi.org/10.1109/IWAT.2011.5752392","url":null,"abstract":"Multiple antennas in conjunction with Multiple Input Multiple Output (MIMO) systems offer significant increases in capacity without increasing transmit power or spectrum and are becoming an integral part of all modern wireless communication systems. For example multiple antenna technology is already used in wireless communication systems such as in IEEE 802.11n, WiMAX and LTE. This paper reviews some recent topologies of multiple antennas for handheld devices and base stations. We will focus on the basic concerns and constraints when designing a multiple antenna system. In particular low mutual coupling between antenna elements should be addressed to attain high radiation efficiency and sufficient MIMO capacity gain. Furthermore the number of ports in the multiple antenna systems works against the devices' size constraint. Therefore, it is difficult to achieve a very compact antenna solution for handheld devices with more than 4 ports. In contrast, the base station antenna design can sustain tens of ports building on a cubic structure employing both spatial and polarization diversities.","PeriodicalId":330623,"journal":{"name":"2011 International Workshop on Antenna Technology (iWAT)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123871644","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
On the wideband notched rectangular dielectric resonator antenna 宽带陷波矩形介质谐振器天线
2011 International Workshop on Antenna Technology (iWAT) Pub Date : 2011-03-07 DOI: 10.1109/IWAT.2011.5752325
X. Fang, K. Leung, R. Chen
{"title":"On the wideband notched rectangular dielectric resonator antenna","authors":"X. Fang, K. Leung, R. Chen","doi":"10.1109/IWAT.2011.5752325","DOIUrl":"https://doi.org/10.1109/IWAT.2011.5752325","url":null,"abstract":"The strip-fed wideband notched rectangular dielectric resonator antenna is investigated in this paper. By simultaneously exciting the TE<inf>111</inf><sup>y</sup> and TE<inf>113</inf><sup>y</sup> modes of the DRA, a wide impedance bandwidth of 56% can be obtained, which entirely covers the WLAN (2.4–2.48 GHz) and WiMAX (3.4–3.7 GHz) bands. The reflection coefficient, radiation patterns, antenna gain and efficiency of the antenna were studied. Reasonable agreement between the simulated and measured results is obtained.","PeriodicalId":330623,"journal":{"name":"2011 International Workshop on Antenna Technology (iWAT)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123620371","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
An ultra-wideband antenna based on rectangular tempered ridge waveguide 基于矩形调质脊波导的超宽带天线
2011 International Workshop on Antenna Technology (iWAT) Pub Date : 2011-03-07 DOI: 10.1109/IWAT.2011.5752315
Q. Guo, Zengrui Li, Jilong Ju
{"title":"An ultra-wideband antenna based on rectangular tempered ridge waveguide","authors":"Q. Guo, Zengrui Li, Jilong Ju","doi":"10.1109/IWAT.2011.5752315","DOIUrl":"https://doi.org/10.1109/IWAT.2011.5752315","url":null,"abstract":"An ultra-wideband antenna based on rectangular tempered ridge waveguide is presented in this paper. It consisted of a ground plane and a rectangular tempered ridge waveguide shape radiator designed on FR4 substrate with dielectric constant 4.4 and thickness 1.6 mm. The antenna is successfully designed, implemented, and measured. Simulation and measurement results are given and compared. Both results show that the return loss of the antenna less than −10 dB cover the frequency band for UWB applications. Far field radiation patterns of the antenna in xoy plane and xoz plane at 3.5 GHz, 7 GHz and 10 GHz are given respectively.","PeriodicalId":330623,"journal":{"name":"2011 International Workshop on Antenna Technology (iWAT)","volume":"183 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113996621","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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