Pub Date : 2015-03-04DOI: 10.1109/IWAT.2015.7365379
T. Nguyen, Jae-Young Chung
In this paper, we report results of parametric study on the radiation efficiency of woven textile antennas using full-wave simulations and measurements. The parameters of interest are the conductive thread diameter and intervals between the threads consisting of a rectangular woven patch. In a full-wave simulation tool, rectangular patch antennas are modeled by weaving conductive threads with different thread diameters and intervals. The results show that the radiation efficiency increases with a wider interval between the threads when a thicker conductive thread is used. This contrasts with the common assumptions that radiation efficiency increases as more conductive material is used. These results are also validated by experiments on woven patch antennas fabricated with silver-coated threads.
{"title":"Parametric study on radiation efficiency of woven textile antennas","authors":"T. Nguyen, Jae-Young Chung","doi":"10.1109/IWAT.2015.7365379","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365379","url":null,"abstract":"In this paper, we report results of parametric study on the radiation efficiency of woven textile antennas using full-wave simulations and measurements. The parameters of interest are the conductive thread diameter and intervals between the threads consisting of a rectangular woven patch. In a full-wave simulation tool, rectangular patch antennas are modeled by weaving conductive threads with different thread diameters and intervals. The results show that the radiation efficiency increases with a wider interval between the threads when a thicker conductive thread is used. This contrasts with the common assumptions that radiation efficiency increases as more conductive material is used. These results are also validated by experiments on woven patch antennas fabricated with silver-coated threads.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"11 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":"114222502","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365336
Sumin Yun, Y. Kim, Youngjoon Lim, S. Nam
A magnetic tripolarization antenna is proposed for DSRC (Dedicated Short Range Communication) applications. A conventional patch antenna, which is usually used to generate the horizontal polarization, is modified to generate the perpendicular polarizations by including the ring slots. The opposite currents flowing the upper and under conductors generate loop current. For the horizontal polarization ZOR (Zeroth Order Resonance) loop antenna is included in the proposed structure. The uniform current of the ZOR loop antenna effectively generates the horizontal polarization. The simulated result shows that the proposed antenna has -10 dB impedance bandwidths from 5.85 to 5.94 GHz, which is appropriate for DSRC applications. The isolation between ports is higher than 25 dB over DSRC bandwidth. The proposed antenna has a size of 32 × 32 × 1.57 mm3.
{"title":"Matnetic tripolarizaiton antenna for DSRC applications","authors":"Sumin Yun, Y. Kim, Youngjoon Lim, S. Nam","doi":"10.1109/IWAT.2015.7365336","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365336","url":null,"abstract":"A magnetic tripolarization antenna is proposed for DSRC (Dedicated Short Range Communication) applications. A conventional patch antenna, which is usually used to generate the horizontal polarization, is modified to generate the perpendicular polarizations by including the ring slots. The opposite currents flowing the upper and under conductors generate loop current. For the horizontal polarization ZOR (Zeroth Order Resonance) loop antenna is included in the proposed structure. The uniform current of the ZOR loop antenna effectively generates the horizontal polarization. The simulated result shows that the proposed antenna has -10 dB impedance bandwidths from 5.85 to 5.94 GHz, which is appropriate for DSRC applications. The isolation between ports is higher than 25 dB over DSRC bandwidth. The proposed antenna has a size of 32 × 32 × 1.57 mm3.","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":"132039403","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365333
Y. Sugimoto, T. Hori, M. Fujimoto, S. Iwanaga, S. Hori
In order to realize the wireless broadband communication, a small antenna which has the ultra-wideband characteristics is required. The well-known planar monopole antenna features wideband characteristics, small size and simple structure. Thereby, planar monopole antennas of various shapes have been proposed. The paper proposes the T-shaped planar monopole antenna with a basis of rectangular planar monopole antenna. In addition, the structure of T-ledge which has the most broadband characteristics and the limitation of the broadband characteristics are clarified.
{"title":"Broadband characteristics of T-shaped planar monopole antenna","authors":"Y. Sugimoto, T. Hori, M. Fujimoto, S. Iwanaga, S. Hori","doi":"10.1109/IWAT.2015.7365333","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365333","url":null,"abstract":"In order to realize the wireless broadband communication, a small antenna which has the ultra-wideband characteristics is required. The well-known planar monopole antenna features wideband characteristics, small size and simple structure. Thereby, planar monopole antennas of various shapes have been proposed. The paper proposes the T-shaped planar monopole antenna with a basis of rectangular planar monopole antenna. In addition, the structure of T-ledge which has the most broadband characteristics and the limitation of the broadband characteristics are clarified.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"38 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":"123349255","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365284
Daisuke Takei, K. Saito, K. Ito
Wireless power transmission system has become one of the most-growing, high-impact technologies, due to power supply without batteries or wired power transfer. In recent years, this system is suggested combining with capsular endoscopes being used to diagnose digestive organs. In this paper, we proposed a receiving antenna which is assumed to be stowed in the capsular endoscope to transceive wireless signal for medical applications. This antenna is designed to operate in 430 MHz band. The results show that the capsular endoscope can be received required power for operation.
{"title":"Small antenna stowed in capsular endoscope for wireless power transmission","authors":"Daisuke Takei, K. Saito, K. Ito","doi":"10.1109/IWAT.2015.7365284","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365284","url":null,"abstract":"Wireless power transmission system has become one of the most-growing, high-impact technologies, due to power supply without batteries or wired power transfer. In recent years, this system is suggested combining with capsular endoscopes being used to diagnose digestive organs. In this paper, we proposed a receiving antenna which is assumed to be stowed in the capsular endoscope to transceive wireless signal for medical applications. This antenna is designed to operate in 430 MHz band. The results show that the capsular endoscope can be received required power for operation.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"1 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":"129430972","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365302
Sung Hoe Kim, Youngsu Kim, Y. Yoon
This paper proposes a reflectarray antenna element operating in X-band composed of a tripole and double rings. The size of the element is half-wavelength and phase curve is achieved by variation of radius of inner ring from 8 GHz to 12 GHz. This element has 544 degrees of phase range at center frequency. By applying this element to electromagnetic gradient surface using 120 degrees phase difference, the result shows broadband radar cross section reduction in X-band.
{"title":"Reflectarray element combined a tripole with double rings and broadband RCS reduction","authors":"Sung Hoe Kim, Youngsu Kim, Y. Yoon","doi":"10.1109/IWAT.2015.7365302","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365302","url":null,"abstract":"This paper proposes a reflectarray antenna element operating in X-band composed of a tripole and double rings. The size of the element is half-wavelength and phase curve is achieved by variation of radius of inner ring from 8 GHz to 12 GHz. This element has 544 degrees of phase range at center frequency. By applying this element to electromagnetic gradient surface using 120 degrees phase difference, the result shows broadband radar cross section reduction in X-band.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"1 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":"129386606","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365340
H. Kaouach, A. Kabashi
The paper introduces new wideband Antenna-Filter-Antenna (AFA) uniform arrays that can be utilized as frequency selective surfaces (FSS) with low loss and sharp roll-off response, which are highly desirable characteristics in Q-Band. The design adopts a simple 3-layer single polarization structure consisting of two patch antennas and a resonator. Both simulations and measurements are used to characterize the performances of the proposed design. Overall results show 18.5 % 10-dB bandwidth. For the targeted band the insertion loss is less than 0.2 dB. Possible applications include quasi-optical amps, grid mixers and radomes for aircraft radar antennas.
{"title":"Bandpass antenna-filter-antenna arrays for filtering applications at 40 GHz","authors":"H. Kaouach, A. Kabashi","doi":"10.1109/IWAT.2015.7365340","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365340","url":null,"abstract":"The paper introduces new wideband Antenna-Filter-Antenna (AFA) uniform arrays that can be utilized as frequency selective surfaces (FSS) with low loss and sharp roll-off response, which are highly desirable characteristics in Q-Band. The design adopts a simple 3-layer single polarization structure consisting of two patch antennas and a resonator. Both simulations and measurements are used to characterize the performances of the proposed design. Overall results show 18.5 % 10-dB bandwidth. For the targeted band the insertion loss is less than 0.2 dB. Possible applications include quasi-optical amps, grid mixers and radomes for aircraft radar antennas.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"07 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":"129488032","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365325
Wen‐Hua Tu
A design method for coplanar waveguide-fed capacitively coupled slot antenna is presented. An equivalent model of a coupling capacitor and two parallel short-circuit slotlines is proposed for analyzing the capacitively coupled slot antenna. Equations as well as design curves are provided. Two conventional antennas are fabricated and measured. The simulated results show good agreement with the measured results.
{"title":"Analysis and design of coplanar waveguide-fed capacitively coupled slot antennas","authors":"Wen‐Hua Tu","doi":"10.1109/IWAT.2015.7365325","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365325","url":null,"abstract":"A design method for coplanar waveguide-fed capacitively coupled slot antenna is presented. An equivalent model of a coupling capacitor and two parallel short-circuit slotlines is proposed for analyzing the capacitively coupled slot antenna. Equations as well as design curves are provided. Two conventional antennas are fabricated and measured. The simulated results show good agreement with the measured results.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"10 20 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":"128520953","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365322
K. Min, Jinsock Lee
This paper presents a design for four band patch antenna by CPW feeding for the in-building mobile communication. Especially, a parasitic element is considered for beam direction control. In order to satisfy for the mobile communication service such as LTE (890 MHz band), PCS (1.8 GHz band), W-CDMA (2.0 GHz band) and Wi-Fi (2.43 GHz band), a CPW feeding structure and a circular patch with slit for broad bandwidth are designed. The simulated results were shown a good agreement with the measured ones of a proposed antenna.
{"title":"Four band patch antenna by CPW feeding for in-building mobile communication","authors":"K. Min, Jinsock Lee","doi":"10.1109/IWAT.2015.7365322","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365322","url":null,"abstract":"This paper presents a design for four band patch antenna by CPW feeding for the in-building mobile communication. Especially, a parasitic element is considered for beam direction control. In order to satisfy for the mobile communication service such as LTE (890 MHz band), PCS (1.8 GHz band), W-CDMA (2.0 GHz band) and Wi-Fi (2.43 GHz band), a CPW feeding structure and a circular patch with slit for broad bandwidth are designed. The simulated results were shown a good agreement with the measured ones of a proposed antenna.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"3 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":"121216120","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365368
A. Kukharenko
Construction of metamaterials, based on mushroom-type band-gap structures is described. Two methods of such a metamaterial working band extension, which are based on forming an additional impedance surface in the middle of band-gap structure, are suggested. Ways of suggested methods realization are described. A numerical analysis of suggested structures, which demonstrates the band widening effect, and experimental measurements, which proves the numerical results, is made.
{"title":"Method of metamaterial bandwidth extention","authors":"A. Kukharenko","doi":"10.1109/IWAT.2015.7365368","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365368","url":null,"abstract":"Construction of metamaterials, based on mushroom-type band-gap structures is described. Two methods of such a metamaterial working band extension, which are based on forming an additional impedance surface in the middle of band-gap structure, are suggested. Ways of suggested methods realization are described. A numerical analysis of suggested structures, which demonstrates the band widening effect, and experimental measurements, which proves the numerical results, is made.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"17 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":"123668235","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365280
Kei Firdaus, K. Sakakibara, Y. Amano, H. Hirayama, N. Kikuma, T. Tabata, Satoshi Hori Kojima
A spiral-slot Frequency Selective Surface (FSS) is applied to a Wireless Power Transfer (WPT) system in 12MHz band. To reduce the physical size of FSS, single spiral-slot configuration is designed. As a result of the simulation of the designed WPT system with FSS, transmission efficiency higher than 80% is obtained, while interference can be stopped in other frequency band.
{"title":"Design of spiral-slot frequency selective surfaces for shielding from noises of wireless power transfer","authors":"Kei Firdaus, K. Sakakibara, Y. Amano, H. Hirayama, N. Kikuma, T. Tabata, Satoshi Hori Kojima","doi":"10.1109/IWAT.2015.7365280","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365280","url":null,"abstract":"A spiral-slot Frequency Selective Surface (FSS) is applied to a Wireless Power Transfer (WPT) system in 12MHz band. To reduce the physical size of FSS, single spiral-slot configuration is designed. As a result of the simulation of the designed WPT system with FSS, transmission efficiency higher than 80% is obtained, while interference can be stopped in other frequency band.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"16 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":"114903084","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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