Pub Date : 2010-04-12DOI: 10.1109/IWAT.2010.5464641
J. Lizarraga, Carlos DEL-RIO
THz technology for developing imaging systems has recently aroused great interest, mainly due to the large number of applications in which these frequencies can be used: security, vision in hard environments, etc. In this paper we propose a method that reduces significantly the number of detectors needed for achieving certain resolution by means of diffraction that paradoxically is its main limiting factor in current imaging devices. The method uses diffraction as a way of achieving spatial diversity and as an anti-aliasing LPF. Some examples of images are provided in the paper, showing that despite the blur created by the diffraction, it is possible firstly to sample this slow variance image, secondly, to interpolate it and finally to recover the original image.
{"title":"Resolution capabilities of future THz cameras","authors":"J. Lizarraga, Carlos DEL-RIO","doi":"10.1109/IWAT.2010.5464641","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464641","url":null,"abstract":"THz technology for developing imaging systems has recently aroused great interest, mainly due to the large number of applications in which these frequencies can be used: security, vision in hard environments, etc. In this paper we propose a method that reduces significantly the number of detectors needed for achieving certain resolution by means of diffraction that paradoxically is its main limiting factor in current imaging devices. The method uses diffraction as a way of achieving spatial diversity and as an anti-aliasing LPF. Some examples of images are provided in the paper, showing that despite the blur created by the diffraction, it is possible firstly to sample this slow variance image, secondly, to interpolate it and finally to recover the original image.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121957799","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}
Pub Date : 2010-03-01DOI: 10.1109/IWAT.2010.5464928
N. Pires, M. Letizia, Achim Maisenbacher
The present paper reports on the simulation, construction and measurement of a planar Ultra Wideband (UWB) monopole antenna designed to operate inside a Universal Serial Bus (USB) dongle, aiming at usage in industrial applications. Inexpensive FR4 substrate with εr = 4.4 and 0.8 mm thickness was used and the antenna shape and dimensions fit in a common case. The built antenna prototype was tested inside a USB device case in free space and in a realistic antenna deployment scenario, with the dongle connected to a laptop computer. It was found that the designed antenna exhibits acceptable |S11| matching in the frequency range [2.5; 12] GHz, allowing its usage in UWB and other wireless services such as Bluetooth, LTE and IEEE 802.11.
{"title":"Design of an Ultra Wideband Universal Serial Bus device mounted antenna","authors":"N. Pires, M. Letizia, Achim Maisenbacher","doi":"10.1109/IWAT.2010.5464928","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464928","url":null,"abstract":"The present paper reports on the simulation, construction and measurement of a planar Ultra Wideband (UWB) monopole antenna designed to operate inside a Universal Serial Bus (USB) dongle, aiming at usage in industrial applications. Inexpensive FR4 substrate with εr = 4.4 and 0.8 mm thickness was used and the antenna shape and dimensions fit in a common case. The built antenna prototype was tested inside a USB device case in free space and in a realistic antenna deployment scenario, with the dongle connected to a laptop computer. It was found that the designed antenna exhibits acceptable |S11| matching in the frequency range [2.5; 12] GHz, allowing its usage in UWB and other wireless services such as Bluetooth, LTE and IEEE 802.11.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127289474","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}
Pub Date : 2010-03-01DOI: 10.1109/IWAT.2010.5464701
F. Canneva, J. Ribero, R. Staraj
This paper presents an active antenna dedicated to the mobile TV standards DVB-H, T-DMB or DVB-SH. This meander antenna uses PIN diodes inserted in different points of the radiating element to dynamically cover the frequency band needed for these standards with a sufficient bandwidth. The insertion of active components allows to compensate the drawback of the small volume of this miniature antenna. This novel radiating structure has been developed within the NAOMI project supported by the french ANR (National Agency for the Research).
{"title":"Reconfigurable meander antenna for DVB-H band","authors":"F. Canneva, J. Ribero, R. Staraj","doi":"10.1109/IWAT.2010.5464701","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464701","url":null,"abstract":"This paper presents an active antenna dedicated to the mobile TV standards DVB-H, T-DMB or DVB-SH. This meander antenna uses PIN diodes inserted in different points of the radiating element to dynamically cover the frequency band needed for these standards with a sufficient bandwidth. The insertion of active components allows to compensate the drawback of the small volume of this miniature antenna. This novel radiating structure has been developed within the NAOMI project supported by the french ANR (National Agency for the Research).","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125112172","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}
Pub Date : 2010-03-01DOI: 10.1109/IWAT.2010.5464752
H. Rajagopalan, Y. Rahmat-Samii
This paper characterizes and analyses the link budget requirements for the conformal capsule antenna in the medical capsule imager system. A link budget is developed for the capsule system based on certain parameters (frequency, SAR, power limitations) and it is shown that using the present antenna system; a reliable communication link can be developed for indoor communication for bio-telemetry applications. The polarization diversity exhibited by the conformal capsule antenna is tested and compared to simple dipole design. Due to diverse polarization, a reliable link is obtained irrespective of the capsule location and orientation and this study is discussed in detail.
{"title":"Link budget analysis and characterization for ingestible capsule antenna","authors":"H. Rajagopalan, Y. Rahmat-Samii","doi":"10.1109/IWAT.2010.5464752","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464752","url":null,"abstract":"This paper characterizes and analyses the link budget requirements for the conformal capsule antenna in the medical capsule imager system. A link budget is developed for the capsule system based on certain parameters (frequency, SAR, power limitations) and it is shown that using the present antenna system; a reliable communication link can be developed for indoor communication for bio-telemetry applications. The polarization diversity exhibited by the conformal capsule antenna is tested and compared to simple dipole design. Due to diverse polarization, a reliable link is obtained irrespective of the capsule location and orientation and this study is discussed in detail.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123279837","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}
Pub Date : 2010-03-01DOI: 10.1109/IWAT.2010.5464694
D. Serhal, R. Chantalat, M. Hajj, T. Monediere, B. Jecko
This paper introduces a new model of high gain sectoral metallic Electromagnetic Band Gap antenna used to communicate with mobile vehicles such as cars, trains, etc. This antenna, which is dedicated to base stations, aims at providing high data rate for passengers so that they can connect to Internet during their travel using mobile WiMAX technology. The proposed antenna is realized. Measurements validate simulation results.
{"title":"Sectoral metallic EBG antenna for high data rate wireless terrestrial communications with vehicles using mobile WiMAX technology","authors":"D. Serhal, R. Chantalat, M. Hajj, T. Monediere, B. Jecko","doi":"10.1109/IWAT.2010.5464694","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464694","url":null,"abstract":"This paper introduces a new model of high gain sectoral metallic Electromagnetic Band Gap antenna used to communicate with mobile vehicles such as cars, trains, etc. This antenna, which is dedicated to base stations, aims at providing high data rate for passengers so that they can connect to Internet during their travel using mobile WiMAX technology. The proposed antenna is realized. Measurements validate simulation results.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114140600","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}
Pub Date : 2010-03-01DOI: 10.1109/IWAT.2010.5464696
Fizzah Mubasher, Shihua Wang, Xiao-dong Chen, Z. Ying
This paper presents our initial study on a novel reconfigurable MIMO slot antenna to achieve pattern diversity and therefore improve the system performance. The MIMO antenna consists of two identical reconfigurable slot antennas which are separated by a distance of less than quarter wavelength designed at the frequency of 5.2 GHz suitable for WLAN applications. Each of the slots can be reconfigured in their length by switching on/off the shorting pins within it. The configurations of these shorting pins affects the mutual coupling between the array elements and this leads to pattern diversity which can be used to achieve the optimal capacity of the MIMO channel.
{"title":"Study of reconfigurable antennas for MIMO systems","authors":"Fizzah Mubasher, Shihua Wang, Xiao-dong Chen, Z. Ying","doi":"10.1109/IWAT.2010.5464696","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464696","url":null,"abstract":"This paper presents our initial study on a novel reconfigurable MIMO slot antenna to achieve pattern diversity and therefore improve the system performance. The MIMO antenna consists of two identical reconfigurable slot antennas which are separated by a distance of less than quarter wavelength designed at the frequency of 5.2 GHz suitable for WLAN applications. Each of the slots can be reconfigured in their length by switching on/off the shorting pins within it. The configurations of these shorting pins affects the mutual coupling between the array elements and this leads to pattern diversity which can be used to achieve the optimal capacity of the MIMO channel.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121982486","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}
Pub Date : 2010-03-01DOI: 10.1109/IWAT.2010.5464702
Valdez A de A Filho, P. H. da F Silva, A. D’assunção
This paper described the design, simulation and fabrication of three ultra-wideband log-periodic microstrip antenna arrays. A comparative study is presented between arrays using rectangular, square and circular patch elements and varying the number of elements (5, 10 e 15). Electromagnetically coupled microstrip patches had been used as radiating element of arrays. The frequency responses of these arrays are analysed using the Ansoft Designer¿ commercial software that implements the method of moments. After the simulations were completed, three prototypes were constructed and measured using a vector network analyzer. The results for the -10 dB return loss bandwidth of the antenna arrays are presented. The good agreement between theoretical and experimental results for the built antenna prototypes validated the used methodology.
{"title":"A comparative study of three ultra-wideband log-periodic microstrip antenna arrays","authors":"Valdez A de A Filho, P. H. da F Silva, A. D’assunção","doi":"10.1109/IWAT.2010.5464702","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464702","url":null,"abstract":"This paper described the design, simulation and fabrication of three ultra-wideband log-periodic microstrip antenna arrays. A comparative study is presented between arrays using rectangular, square and circular patch elements and varying the number of elements (5, 10 e 15). Electromagnetically coupled microstrip patches had been used as radiating element of arrays. The frequency responses of these arrays are analysed using the Ansoft Designer¿ commercial software that implements the method of moments. After the simulations were completed, three prototypes were constructed and measured using a vector network analyzer. The results for the -10 dB return loss bandwidth of the antenna arrays are presented. The good agreement between theoretical and experimental results for the built antenna prototypes validated the used methodology.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132197858","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}
Pub Date : 2010-03-01DOI: 10.1109/IWAT.2010.5464676
A. Babar, L. Ukkonen, L. Sydanheimo
In this paper, we will discuss the design and development of a miniaturized dual UHF band antenna, resonating on the RFID bands. The antenna resonates on 433MHz and on the European RFID band (865MHz–868MHz). This antenna design is an updated version of the miniaturized 433MHz antenna model [1], with an improved performance and dual band characteristic. This type of planar antenna can be used in different type of small compact wireless systems, such as small RFID reader units, wireless sensor network nodes, and different indoor/outdoor wireless devices. The biggest challenge in designing such an antenna was the size of the antenna, for which different miniaturization techniques [2] have been used. Miniaturization techniques like shorting the radiating part of the antenna with the ground plane, similar to PIFA (Planar Inverted F Antenna) [3], and using closely coupled parallel meander line approach greatly helped in reducing the size of the antenna. The design and structure of the planar [4] antenna makes it very stable and less vulnerable to the external environmental factors, like different type of hand and walls effects. The reduced size of the antenna, with an ability to resonate on multiple most commonly used frequencies with a good gain and omni-directional radiation pattern makes it a good competitor for replacing the old antenna model with the new multipurpose small, low cost antenna model.
在本文中，我们将讨论一个小型化的双超高频天线的设计和开发，在RFID波段上谐振。天线在433MHz和欧洲RFID频段(865MHz-868MHz)上共振。该天线设计是小型化433MHz天线模型[1]的升级版，具有改进的性能和双频段特性。这种类型的平面天线可用于不同类型的小型紧凑型无线系统，如小型RFID阅读器单元、无线传感器网络节点和不同的室内/室外无线设备。设计这种天线的最大挑战是天线的尺寸，为此使用了不同的小型化技术[2]。小型化技术，如将天线的辐射部分与地平面短路，类似于PIFA (Planar Inverted F antenna，平面倒F天线)[3]，并采用紧密耦合的平行曲线方法，大大有助于减小天线的尺寸。平面天线[4]的设计和结构使其非常稳定，不易受外部环境因素的影响，如不同类型的手效应和墙壁效应。天线的尺寸减小，具有在多个最常用频率上共振的能力，具有良好的增益和全向辐射方向图，使其成为用新的多用途小型低成本天线模型取代旧天线模型的良好竞争对手。
{"title":"Dual UHF RFID band miniaturized multipurpose planar antenna for compact wireless systems","authors":"A. Babar, L. Ukkonen, L. Sydanheimo","doi":"10.1109/IWAT.2010.5464676","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464676","url":null,"abstract":"In this paper, we will discuss the design and development of a miniaturized dual UHF band antenna, resonating on the RFID bands. The antenna resonates on 433MHz and on the European RFID band (865MHz–868MHz). This antenna design is an updated version of the miniaturized 433MHz antenna model [1], with an improved performance and dual band characteristic. This type of planar antenna can be used in different type of small compact wireless systems, such as small RFID reader units, wireless sensor network nodes, and different indoor/outdoor wireless devices. The biggest challenge in designing such an antenna was the size of the antenna, for which different miniaturization techniques [2] have been used. Miniaturization techniques like shorting the radiating part of the antenna with the ground plane, similar to PIFA (Planar Inverted F Antenna) [3], and using closely coupled parallel meander line approach greatly helped in reducing the size of the antenna. The design and structure of the planar [4] antenna makes it very stable and less vulnerable to the external environmental factors, like different type of hand and walls effects. The reduced size of the antenna, with an ability to resonate on multiple most commonly used frequencies with a good gain and omni-directional radiation pattern makes it a good competitor for replacing the old antenna model with the new multipurpose small, low cost antenna model.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134039328","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}
Pub Date : 2010-03-01DOI: 10.1109/IWAT.2010.5464929
G. Casula, P. Maxia, G. Mazzarella
This work deals with the design of a wideband microstrip log periodic array operating between 4 and 18 GHz (thus working in C,X and Ku bands). A few studies, since now, have been proposed but they are significantly less performing and usually quite complicated. Our solution is remarkably simple and shows both SWR and gain better than likely structures proposed in the literature. The same antenna can also be used as an UWB antenna. The design has been developed using CST MICROWAVE STUDIO 2009, a general purpose and specialist tool for the 3D electromagnetic simulation of microwave high frequency components.
本工作涉及工作在4和18 GHz之间的宽带微带日志周期阵列的设计(因此工作在C,X和Ku波段)。从现在起，已经提出了一些研究，但它们的效果明显较差，而且通常相当复杂。我们的解决方案非常简单，并且显示出比文献中提出的结构更好的SWR和增益。同样的天线也可以用作超宽带天线。该设计是使用CST MICROWAVE STUDIO 2009开发的，CST MICROWAVE STUDIO 2009是微波高频元件3D电磁仿真的通用和专业工具。
{"title":"A printed LPDA with UWB capability","authors":"G. Casula, P. Maxia, G. Mazzarella","doi":"10.1109/IWAT.2010.5464929","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464929","url":null,"abstract":"This work deals with the design of a wideband microstrip log periodic array operating between 4 and 18 GHz (thus working in C,X and Ku bands). A few studies, since now, have been proposed but they are significantly less performing and usually quite complicated. Our solution is remarkably simple and shows both SWR and gain better than likely structures proposed in the literature. The same antenna can also be used as an UWB antenna. The design has been developed using CST MICROWAVE STUDIO 2009, a general purpose and specialist tool for the 3D electromagnetic simulation of microwave high frequency components.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134252718","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}
Pub Date : 2010-03-01DOI: 10.1109/IWAT.2010.5464737
H. Wong, K. So, K. Luk, C. Chan, Q. Xue
This paper presents a new size reduction technique for a microstrip antenna by adding parasitic L-shaped shorting strips which are equivalent to provide capacitive and inductive loading effects to the patch. With the use of these parasitic elements, the antenna finds an obvious size reduction while maintaining a good broadside radiation characteristic. Because of this attractive radiation feature, the antenna is suitable for circularly polarized (CP) antennas. A new small CP patch antenna operating at 2.492GHz is therefore proposed using a microwave substrate of dielectric constant, εr=10, with a coaxial probe feed. The total area of reduction is about 82% in comparison with the conventional half-wave patch antenna.
{"title":"New size reduction for patch antenna by parasitic shorting elements","authors":"H. Wong, K. So, K. Luk, C. Chan, Q. Xue","doi":"10.1109/IWAT.2010.5464737","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464737","url":null,"abstract":"This paper presents a new size reduction technique for a microstrip antenna by adding parasitic L-shaped shorting strips which are equivalent to provide capacitive and inductive loading effects to the patch. With the use of these parasitic elements, the antenna finds an obvious size reduction while maintaining a good broadside radiation characteristic. Because of this attractive radiation feature, the antenna is suitable for circularly polarized (CP) antennas. A new small CP patch antenna operating at 2.492GHz is therefore proposed using a microwave substrate of dielectric constant, εr=10, with a coaxial probe feed. The total area of reduction is about 82% in comparison with the conventional half-wave patch antenna.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131836634","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}
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