Pub Date : 2015-03-04DOI: 10.1109/IWAT.2015.7365346
Y. Li, T. Cui
We propose to generate the electromagnetic (EM) radiations by holographic metasurfaces, which can produce multi-beam scanning in one dimension (1D) and two dimensions (2D) controlled only by frequency. Respectively, we show that the main lobes of EM radiation beams accomplish 1D or 2D scans regularly with frequency by using the proposed holographic metasurfaces shaped with different interference patterns. To the best of our knowledge, this is the first time to realize 2D scans of antennas by changing the frequency.
{"title":"Frequency multi-beam scanning in one diemnsion and two dimensions governed by holographic metasurfaces","authors":"Y. Li, T. Cui","doi":"10.1109/IWAT.2015.7365346","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365346","url":null,"abstract":"We propose to generate the electromagnetic (EM) radiations by holographic metasurfaces, which can produce multi-beam scanning in one dimension (1D) and two dimensions (2D) controlled only by frequency. Respectively, we show that the main lobes of EM radiation beams accomplish 1D or 2D scans regularly with frequency by using the proposed holographic metasurfaces shaped with different interference patterns. To the best of our knowledge, this is the first time to realize 2D scans of antennas by changing the frequency.","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":"126532009","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.2015.7365368
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.2015.7365360
Wen‐Shan Chen, Chun-Sheng Lin, Hung-Ming Liu
This paper proposes a monopole type MIMO antenna at WLAN band for dongle application. The MIMO antenna consists of two identical monopole antennas on both ends of an FR4 substrate and operates a frequency band at 2.45 GHz. The antenna is fabricated on an FR4 substrate of permittivity of 4.4, thickness of 1.6 mm, and loss tangent of 0.0245. The isolation mechanism is by cutting U-slot and introducing three isolation elements, which are extended from the ground plane; one is located on the center part of the antenna portion and two strips are located symmetrically at the edges of the U-shaped ground. The overall dimensions (25 × 50 mm2) of the proposed MIMO antenna including an antenna portion (14 × 25 mm2) and a system ground (25 × 36 mm2). The prototype is constructed and investigated. Form the design results, the measured S21 within WLAN 2.4GHz band is below -15 dB; the radiation patterns are with an omni-directional characteristic. In addition, the antenna with the simple structure and good performances is suitable for applying in WLAN system of small size.
{"title":"MIMO antennas with U-shaped ground and three protrued strips for WLAN applications","authors":"Wen‐Shan Chen, Chun-Sheng Lin, Hung-Ming Liu","doi":"10.1109/IWAT.2015.7365360","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365360","url":null,"abstract":"This paper proposes a monopole type MIMO antenna at WLAN band for dongle application. The MIMO antenna consists of two identical monopole antennas on both ends of an FR4 substrate and operates a frequency band at 2.45 GHz. The antenna is fabricated on an FR4 substrate of permittivity of 4.4, thickness of 1.6 mm, and loss tangent of 0.0245. The isolation mechanism is by cutting U-slot and introducing three isolation elements, which are extended from the ground plane; one is located on the center part of the antenna portion and two strips are located symmetrically at the edges of the U-shaped ground. The overall dimensions (25 × 50 mm2) of the proposed MIMO antenna including an antenna portion (14 × 25 mm2) and a system ground (25 × 36 mm2). The prototype is constructed and investigated. Form the design results, the measured S21 within WLAN 2.4GHz band is below -15 dB; the radiation patterns are with an omni-directional characteristic. In addition, the antenna with the simple structure and good performances is suitable for applying in WLAN system of small size.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"36 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":"122237448","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.2015.7365271
N. Shinohara
Microwave power transfer (MPT) is a long-distance wireless power transfer (WPT) technology. At Kyoto University, since the 1980s, various MPT applications have been proposed and much MPT research has been done. The university has two large anechoic chambers for MPT research, which are open for collaborative studies. With these research facilities, we conducted a beam-forming experiment with a phased array to create a flat-top power beam in the near field with high beam efficiency and the high RF-DC conversion efficiency for a rectifying antenna, which is calculated by a genetic algorithm. On the basis of the university's research activities, we promote commercial MPT applications with a consortium called WiPoT, whose membership comprises 29 companies and 38 universities. In this study, these activities of Kyoto University are introduced.
{"title":"Research and standardization activities of wireless power transfer via microwaves at Kyoto university","authors":"N. Shinohara","doi":"10.1109/IWAT.2015.7365271","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365271","url":null,"abstract":"Microwave power transfer (MPT) is a long-distance wireless power transfer (WPT) technology. At Kyoto University, since the 1980s, various MPT applications have been proposed and much MPT research has been done. The university has two large anechoic chambers for MPT research, which are open for collaborative studies. With these research facilities, we conducted a beam-forming experiment with a phased array to create a flat-top power beam in the near field with high beam efficiency and the high RF-DC conversion efficiency for a rectifying antenna, which is calculated by a genetic algorithm. On the basis of the university's research activities, we promote commercial MPT applications with a consortium called WiPoT, whose membership comprises 29 companies and 38 universities. In this study, these activities of Kyoto University are introduced.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"18 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":"126614727","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}
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.2015.7365340
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.2015.7365383
J. Tak, Jaehoon Choi
In this paper, a reconfigurable single port triangular patch antenna with polarization diversity is proposed. The proposed antenna consists of a coaxially-fed corner-truncated equilateral triangular patch, two small parasitic triangular patches in the vicinity of truncated corners, two PIN diodes located between truncated corners of the patch and parasitic small patches as switch, two RF choke inductors, and dc bias line for practical design. The antenna has four different radiation modes depending on the diodes states (on and off): high-frequency linear polarization, low-frequency linear polarization, left-hand circular polarization, and right-hand circular polarization. The switchable antenna is designed to operate in 2.4 GHz ISM band for wireless communication applications such as wireless local area network and global positioning system.
{"title":"Reconfigurable single port triangular patch antenna with polarization diversity","authors":"J. Tak, Jaehoon Choi","doi":"10.1109/IWAT.2015.7365383","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365383","url":null,"abstract":"In this paper, a reconfigurable single port triangular patch antenna with polarization diversity is proposed. The proposed antenna consists of a coaxially-fed corner-truncated equilateral triangular patch, two small parasitic triangular patches in the vicinity of truncated corners, two PIN diodes located between truncated corners of the patch and parasitic small patches as switch, two RF choke inductors, and dc bias line for practical design. The antenna has four different radiation modes depending on the diodes states (on and off): high-frequency linear polarization, low-frequency linear polarization, left-hand circular polarization, and right-hand circular polarization. The switchable antenna is designed to operate in 2.4 GHz ISM band for wireless communication applications such as wireless local area network and global positioning system.","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":"129715724","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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