Pub Date : 2012-03-05DOI: 10.1109/IWAT.2012.6178385
J. Volakis, Lanlin Zhang, Zheyu Wang, Y. Bayram
We introduce a novel class of flexible Radio Frequency (RF) electronics composed of conductive fibers on polymer or fabric substrates. The proposed fiber conductors and polymer substrates provide excellent RF characteristics, including mechanical flexibility and conformality. Key to the improved conductivity is the increased stitching density of the employed conductive fibers, reaching >;70 stitches per cm2. Prototype flexible antennas and circuits were fabricated and validated for their RF performance. These were realized by embroidering them on organza fabrics or by integrating them on thin polymer substrates. Their RF performance was found comparable to their conventional copper counterparts. Because of their excellent RF performance and high level of flexibility, these embroidered antennas should lead to a new class of devices expected to provide high data rate, low profile, and reliable operation for RF applications.
{"title":"Embroidered flexible RF electronics","authors":"J. Volakis, Lanlin Zhang, Zheyu Wang, Y. Bayram","doi":"10.1109/IWAT.2012.6178385","DOIUrl":"https://doi.org/10.1109/IWAT.2012.6178385","url":null,"abstract":"We introduce a novel class of flexible Radio Frequency (RF) electronics composed of conductive fibers on polymer or fabric substrates. The proposed fiber conductors and polymer substrates provide excellent RF characteristics, including mechanical flexibility and conformality. Key to the improved conductivity is the increased stitching density of the employed conductive fibers, reaching >;70 stitches per cm2. Prototype flexible antennas and circuits were fabricated and validated for their RF performance. These were realized by embroidering them on organza fabrics or by integrating them on thin polymer substrates. Their RF performance was found comparable to their conventional copper counterparts. Because of their excellent RF performance and high level of flexibility, these embroidered antennas should lead to a new class of devices expected to provide high data rate, low profile, and reliable operation for RF applications.","PeriodicalId":6341,"journal":{"name":"2012 IEEE International Workshop on Antenna Technology (iWAT)","volume":"26 1","pages":"8-11"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86084115","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 : 2012-03-05DOI: 10.1109/IWAT.2012.6178396
Lili Xu, Qingqing Song, Xinbo Wang, J. Huangfu, L. Ran
In this paper, we propose a beam forming architecture for improving the power-inversion algorithm that is most commonly used in nulling antenna systems. To prevent the possible degradation of the original gain of a nulling antenna in the circumstance when there exists strong interference, we multiplex the received signals from the physical radiation elements in digital domain with a power-inversion array (PIA) and a primitive array (PA), and then form the desired radiation pattern by multiplying the outputs from PIA and PA, to obtain expected narrow nulls in the directions of the interference and in the meantime roughly maintain the original gain and the beam shape of the main lobe. Simulation fits well with the analysis, showing the effectiveness of the proposed approach.
{"title":"Performance enhancement of nulling antennas by utilizing the concept of multiplicative array","authors":"Lili Xu, Qingqing Song, Xinbo Wang, J. Huangfu, L. Ran","doi":"10.1109/IWAT.2012.6178396","DOIUrl":"https://doi.org/10.1109/IWAT.2012.6178396","url":null,"abstract":"In this paper, we propose a beam forming architecture for improving the power-inversion algorithm that is most commonly used in nulling antenna systems. To prevent the possible degradation of the original gain of a nulling antenna in the circumstance when there exists strong interference, we multiplex the received signals from the physical radiation elements in digital domain with a power-inversion array (PIA) and a primitive array (PA), and then form the desired radiation pattern by multiplying the outputs from PIA and PA, to obtain expected narrow nulls in the directions of the interference and in the meantime roughly maintain the original gain and the beam shape of the main lobe. Simulation fits well with the analysis, showing the effectiveness of the proposed approach.","PeriodicalId":6341,"journal":{"name":"2012 IEEE International Workshop on Antenna Technology (iWAT)","volume":"52 1","pages":"52-55"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83880975","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 : 2012-03-05DOI: 10.1109/IWAT.2012.6178399
H. Gulan, S. Beer, S. Diebold, P. Pahl, B. Goettel, T. Zwick
A 2×2-patch array for System-in-Package radar sensors at 122 GHz is presented in this paper. The antenna is realized on a 127 μm thick Alumina substrate and fed by a coplanar-waveguide (cpw) which allows direct attachment to a monolithic millimeter-wave integrated circuit (MMIC) as well as a probe-based measurement of the antenna. The design of the microstrip-fed patch array itself and the cpw-to-microstrip transition are explained. Measured results of gain, radiation pattern and return loss are presented, showing good agreement to simulation.
{"title":"CPW fed 2 × 2 patch array for D-band System-in-Package applications","authors":"H. Gulan, S. Beer, S. Diebold, P. Pahl, B. Goettel, T. Zwick","doi":"10.1109/IWAT.2012.6178399","DOIUrl":"https://doi.org/10.1109/IWAT.2012.6178399","url":null,"abstract":"A 2×2-patch array for System-in-Package radar sensors at 122 GHz is presented in this paper. The antenna is realized on a 127 μm thick Alumina substrate and fed by a coplanar-waveguide (cpw) which allows direct attachment to a monolithic millimeter-wave integrated circuit (MMIC) as well as a probe-based measurement of the antenna. The design of the microstrip-fed patch array itself and the cpw-to-microstrip transition are explained. Measured results of gain, radiation pattern and return loss are presented, showing good agreement to simulation.","PeriodicalId":6341,"journal":{"name":"2012 IEEE International Workshop on Antenna Technology (iWAT)","volume":"97 1","pages":"64-67"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81750834","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 : 2012-03-05DOI: 10.1109/IWAT.2012.6178651
O. Diop, F. Ferrero, A. Diallo, G. Jacquemod, C. Laporte, H. Ezzeddine, C. Luxey
In this paper, we present the design of electrically small antennas for biomedical application at 2.4 GHz. Performance of two different antennas built using the Integrated Passive Devices (IPD) technology from STMicroelectronics is investigated. Two monopoles miniaturized with the meandered technique are studied. Their quality factor Qz is calculated from their input impedance and compared with the quality factor limits for planar antennas given by Gustafsson. Therefore, we determine which configuration offers the best trade-off between radiation efficiency and quality factor Qz.
{"title":"Planar antennas on Integrated Passive Device technology for biomedical applications","authors":"O. Diop, F. Ferrero, A. Diallo, G. Jacquemod, C. Laporte, H. Ezzeddine, C. Luxey","doi":"10.1109/IWAT.2012.6178651","DOIUrl":"https://doi.org/10.1109/IWAT.2012.6178651","url":null,"abstract":"In this paper, we present the design of electrically small antennas for biomedical application at 2.4 GHz. Performance of two different antennas built using the Integrated Passive Devices (IPD) technology from STMicroelectronics is investigated. Two monopoles miniaturized with the meandered technique are studied. Their quality factor Qz is calculated from their input impedance and compared with the quality factor limits for planar antennas given by Gustafsson. Therefore, we determine which configuration offers the best trade-off between radiation efficiency and quality factor Qz.","PeriodicalId":6341,"journal":{"name":"2012 IEEE International Workshop on Antenna Technology (iWAT)","volume":"67 1","pages":"217-220"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83849912","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 : 2012-03-05DOI: 10.1109/IWAT.2012.6178639
Ho-Hsin Yeh, N. Hiramatsu, K. Melde
This paper mainly discusses the preliminary design of 60GHz antennas utilized in the multi-chip multi-core (MCMC) architecture. The antenna is designed with the low temperature co-fired ceramic (LTCC) fabrication process and the stacked via is selected as the vertical feeding. The designed antenna on the artificial magnetic conductor (AMC) demonstrates the high efficiency, impedance matching and enhanced end-fire radiation capabilities with the surface wave on the ground shielded conducting structures.
{"title":"60 GHz AMC antennas in multi-processor multi-chip data transmission","authors":"Ho-Hsin Yeh, N. Hiramatsu, K. Melde","doi":"10.1109/IWAT.2012.6178639","DOIUrl":"https://doi.org/10.1109/IWAT.2012.6178639","url":null,"abstract":"This paper mainly discusses the preliminary design of 60GHz antennas utilized in the multi-chip multi-core (MCMC) architecture. The antenna is designed with the low temperature co-fired ceramic (LTCC) fabrication process and the stacked via is selected as the vertical feeding. The designed antenna on the artificial magnetic conductor (AMC) demonstrates the high efficiency, impedance matching and enhanced end-fire radiation capabilities with the surface wave on the ground shielded conducting structures.","PeriodicalId":6341,"journal":{"name":"2012 IEEE International Workshop on Antenna Technology (iWAT)","volume":"183 2","pages":"173-176"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91476593","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 : 2012-03-05DOI: 10.1109/IWAT.2012.6178681
Yong-xin Guo
In this paper, our research progress on millimeter-wave on-chip antennas and antennas in package will be reported. Firstly, wideband 60-GHz on-chip antennas with artificial magnetic conductors (AMC) on a standard 0.18um CMOS process will be presented. With the introduction of AMC, more freedom is added to optimize the antenna performance. The AMC plane can make the reflected wave in phase with the incident wave, therefore increase the gain performance. After that, we will also present a 60-GHz planar helical antenna using the LTCC technology. The antenna element is composed of eight 1/3-turn open loops at various layers connected by via holes to form an axial-mode helical structure to generate traveling wave radiation.
{"title":"Millimeter-wave on-chip antennas and antennas in package","authors":"Yong-xin Guo","doi":"10.1109/IWAT.2012.6178681","DOIUrl":"https://doi.org/10.1109/IWAT.2012.6178681","url":null,"abstract":"In this paper, our research progress on millimeter-wave on-chip antennas and antennas in package will be reported. Firstly, wideband 60-GHz on-chip antennas with artificial magnetic conductors (AMC) on a standard 0.18um CMOS process will be presented. With the introduction of AMC, more freedom is added to optimize the antenna performance. The AMC plane can make the reflected wave in phase with the incident wave, therefore increase the gain performance. After that, we will also present a 60-GHz planar helical antenna using the LTCC technology. The antenna element is composed of eight 1/3-turn open loops at various layers connected by via holes to form an axial-mode helical structure to generate traveling wave radiation.","PeriodicalId":6341,"journal":{"name":"2012 IEEE International Workshop on Antenna Technology (iWAT)","volume":"1 1","pages":"339-342"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87726599","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 : 2012-03-05DOI: 10.1109/IWAT.2012.6178403
Jie Lu, Zhenqi Kuai, Xiaowei Zhu
A broadband suspended patch antenna fed by co-planar double L-probes is proposed in this paper. Unlike a conventional L-probe fed patch antenna, the co-planar double L-probe is composed of two identical L-shaped strips which are printed entirely on a substrate and placed symmetrically below the patch. Hence, this kind of L-probe is more flexible to design and convenient to fabricate than a conventional one. A broadband 180° power divider is used to feed the double L-probes, which maintains the currents induced on the patch in phase and improves the symmetry of the current distribution. Because of this, the symmetry of the E-plane in radiation patterns and the H-plane cross polarization property can be improved.
{"title":"Broadband suspended patch antenna fed by co-planar double L-probes","authors":"Jie Lu, Zhenqi Kuai, Xiaowei Zhu","doi":"10.1109/IWAT.2012.6178403","DOIUrl":"https://doi.org/10.1109/IWAT.2012.6178403","url":null,"abstract":"A broadband suspended patch antenna fed by co-planar double L-probes is proposed in this paper. Unlike a conventional L-probe fed patch antenna, the co-planar double L-probe is composed of two identical L-shaped strips which are printed entirely on a substrate and placed symmetrically below the patch. Hence, this kind of L-probe is more flexible to design and convenient to fabricate than a conventional one. A broadband 180° power divider is used to feed the double L-probes, which maintains the currents induced on the patch in phase and improves the symmetry of the current distribution. Because of this, the symmetry of the E-plane in radiation patterns and the H-plane cross polarization property can be improved.","PeriodicalId":6341,"journal":{"name":"2012 IEEE International Workshop on Antenna Technology (iWAT)","volume":"46 1","pages":"80-83"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82126017","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 : 2012-03-05DOI: 10.1109/IWAT.2012.6178384
C. Balanis
The evolution of antenna technology is reviewed, from the days of Marconi to the present. Various periods over which antenna technology has been revitalized are reviewed, and the various antenna configurations developed during those periods are summarized along with some of their respective key characteristics. The history starts at the beginning of the 20th century and the respective technologies developed in the decades that follow are identified. Individuals that played a key role, especially during the early stages of antenna technology, are identified. Future trends and needs are speculated. Key technologies that will contribute to future advancements are identified and will be presented at the conference.
{"title":"Antenna technology: Past, present and future","authors":"C. Balanis","doi":"10.1109/IWAT.2012.6178384","DOIUrl":"https://doi.org/10.1109/IWAT.2012.6178384","url":null,"abstract":"The evolution of antenna technology is reviewed, from the days of Marconi to the present. Various periods over which antenna technology has been revitalized are reviewed, and the various antenna configurations developed during those periods are summarized along with some of their respective key characteristics. The history starts at the beginning of the 20th century and the respective technologies developed in the decades that follow are identified. Individuals that played a key role, especially during the early stages of antenna technology, are identified. Future trends and needs are speculated. Key technologies that will contribute to future advancements are identified and will be presented at the conference.","PeriodicalId":6341,"journal":{"name":"2012 IEEE International Workshop on Antenna Technology (iWAT)","volume":"7 1","pages":"5-7"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72953141","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 : 2012-03-05DOI: 10.1109/IWAT.2012.6178647
Zheyu Wang, Lanlin Zhang, D. Psychoudakis, J. Volakis
This paper presents an embroidered body-worn antenna using conductive fibers (E-fibers). The antenna's conductive surfaces were fabricated using precise and automated embroidering techniques to produce fully flexible and conformal antenna elements attached to regular fabrics and clothing. These E-fiber antennas offer desirable mechanical properties without undermining electrical performance for body-worn, on-clothing applications at radio frequencies (RF). In this study, we used an embroidered asymmetric meandered flare (AMF) dipole antenna to validate the textile antenna's performance. Its excellent RF performance was found comparable to conventional printed antennas. Therefore, these new E-fiber antennas may be integrated into scarves, handbags, shirts, coats or hand bands for convenient carefree health monitoring and wideband communications.
{"title":"Flexible textile antennas for body-worn communication","authors":"Zheyu Wang, Lanlin Zhang, D. Psychoudakis, J. Volakis","doi":"10.1109/IWAT.2012.6178647","DOIUrl":"https://doi.org/10.1109/IWAT.2012.6178647","url":null,"abstract":"This paper presents an embroidered body-worn antenna using conductive fibers (E-fibers). The antenna's conductive surfaces were fabricated using precise and automated embroidering techniques to produce fully flexible and conformal antenna elements attached to regular fabrics and clothing. These E-fiber antennas offer desirable mechanical properties without undermining electrical performance for body-worn, on-clothing applications at radio frequencies (RF). In this study, we used an embroidered asymmetric meandered flare (AMF) dipole antenna to validate the textile antenna's performance. Its excellent RF performance was found comparable to conventional printed antennas. Therefore, these new E-fiber antennas may be integrated into scarves, handbags, shirts, coats or hand bands for convenient carefree health monitoring and wideband communications.","PeriodicalId":6341,"journal":{"name":"2012 IEEE International Workshop on Antenna Technology (iWAT)","volume":"66 1","pages":"205-208"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86021048","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 : 2012-03-05DOI: 10.1109/IWAT.2012.6178663
M. S. Zulkefli, F. Malek, M. Jamlos, K. Juni, M. S. Idris, M. I. M. Saleh, M. H. Mat, S. Ronald
In this paper, a very small 2.45 GHz printed antenna suitable for WLAN application is proposed. In order to decrease the size of the antenna, multi-layer substrate and shorting plate method are used. A microstrip line which can lead to a good impedance matching and four pairs of slot are used to obtain acceptable value of return loss at the desired frequency. These techniques are used as a mean that they can be applied in this antenna design and also can give an effect on the antenna characteristics. This antenna shows an omni-directional radiation pattern similar to that of a monopole antenna.
{"title":"A very small novel patch antenna design for WLAN application","authors":"M. S. Zulkefli, F. Malek, M. Jamlos, K. Juni, M. S. Idris, M. I. M. Saleh, M. H. Mat, S. Ronald","doi":"10.1109/IWAT.2012.6178663","DOIUrl":"https://doi.org/10.1109/IWAT.2012.6178663","url":null,"abstract":"In this paper, a very small 2.45 GHz printed antenna suitable for WLAN application is proposed. In order to decrease the size of the antenna, multi-layer substrate and shorting plate method are used. A microstrip line which can lead to a good impedance matching and four pairs of slot are used to obtain acceptable value of return loss at the desired frequency. These techniques are used as a mean that they can be applied in this antenna design and also can give an effect on the antenna characteristics. This antenna shows an omni-directional radiation pattern similar to that of a monopole antenna.","PeriodicalId":6341,"journal":{"name":"2012 IEEE International Workshop on Antenna Technology (iWAT)","volume":"37 1","pages":"265-268"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88599786","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：