Pub Date : 2018-03-01DOI: 10.1109/IWAT.2018.8379182
Yuanhua Sun, Yihe Liu, Nianqing Tang, Dajun Xu, Y. Li, Yong-can Yu, Kai Zhang, Wei Dai, Quandeng Gou, Z. Du
The new compact end-fire linear polarized printed antenna for frequency identification (RFID) reader is proposed for ultra high frequency (UHF) radio frequency identification (RFID) system in North America. The proposed planar end-fire antenna using two meandered dipole drivers, a folded reflector and a rectangular reflector are presented. The new antenna uses low-cost fabrication. The advantage of the end-fire antenna with meander dipole drivers compared to the conventional Quasi-Yagi antenna is a reduction in the length of the driver, which allows closer space for RFID reader. The dimension of the antenna is 80 × 59mm2. The antenna has maximum gain of 3.6 dB and VSWR better than 2 around the US RFID bands (902–928MHz). We describe the antenna structure and present the comparison of simulation results with experimental data. The proposed antenna is fabricated, and measured reflection coefficient, radiation patterns and gain are presented.
{"title":"The design of end-fire antenna for radio frequency identification (RFID)","authors":"Yuanhua Sun, Yihe Liu, Nianqing Tang, Dajun Xu, Y. Li, Yong-can Yu, Kai Zhang, Wei Dai, Quandeng Gou, Z. Du","doi":"10.1109/IWAT.2018.8379182","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379182","url":null,"abstract":"The new compact end-fire linear polarized printed antenna for frequency identification (RFID) reader is proposed for ultra high frequency (UHF) radio frequency identification (RFID) system in North America. The proposed planar end-fire antenna using two meandered dipole drivers, a folded reflector and a rectangular reflector are presented. The new antenna uses low-cost fabrication. The advantage of the end-fire antenna with meander dipole drivers compared to the conventional Quasi-Yagi antenna is a reduction in the length of the driver, which allows closer space for RFID reader. The dimension of the antenna is 80 × 59mm2. The antenna has maximum gain of 3.6 dB and VSWR better than 2 around the US RFID bands (902–928MHz). We describe the antenna structure and present the comparison of simulation results with experimental data. The proposed antenna is fabricated, and measured reflection coefficient, radiation patterns and gain are presented.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126721371","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379212
Yu Luo, Zhi Ning Chen
The gain of a patch antenna is enhanced by the introduction of a proposed slot cut onto the center of the patch as a “ghost” reversal source. Compared with original patch antenna, the proposed slotted patch features the higher gain by 0.6 dBi with narrower beamwidth by 3° and 5° at E and H-planes, respectively. As example, a patch array with the 2×2 proposed patch elements is designed at 4.45 GHz. The simulation and measurement show that compared with conventional patch arrays, the proposed array prototype achieves 20 % gain enhancement with the half-power beamwidth decrement of 9° and 5° at E and H-planes, respectively.
{"title":"A gain-enhanced patch antenna using a ghost reversal source","authors":"Yu Luo, Zhi Ning Chen","doi":"10.1109/IWAT.2018.8379212","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379212","url":null,"abstract":"The gain of a patch antenna is enhanced by the introduction of a proposed slot cut onto the center of the patch as a “ghost” reversal source. Compared with original patch antenna, the proposed slotted patch features the higher gain by 0.6 dBi with narrower beamwidth by 3° and 5° at E and H-planes, respectively. As example, a patch array with the 2×2 proposed patch elements is designed at 4.45 GHz. The simulation and measurement show that compared with conventional patch arrays, the proposed array prototype achieves 20 % gain enhancement with the half-power beamwidth decrement of 9° and 5° at E and H-planes, respectively.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":" 30","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132158072","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379242
O. Quevedo–Teruel, G. Valério
Here, we introduce the concept of higher symmetries and their implications when introduced in electromagnetic periodic structures. It has recently been demonstrated that higher symmetries are able to reduce the dispersion of periodic structures, to increase their equivalent refractive index, or to create bandgaps that mainly depend on the symmetry of the structure. Their potential applications are in fully metallic reconfigurable phase shifters and filters, flat lenses, and low-dispersive leaky-wave antennas.
{"title":"Electromagnetic structures with higher symmetries","authors":"O. Quevedo–Teruel, G. Valério","doi":"10.1109/IWAT.2018.8379242","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379242","url":null,"abstract":"Here, we introduce the concept of higher symmetries and their implications when introduced in electromagnetic periodic structures. It has recently been demonstrated that higher symmetries are able to reduce the dispersion of periodic structures, to increase their equivalent refractive index, or to create bandgaps that mainly depend on the symmetry of the structure. Their potential applications are in fully metallic reconfigurable phase shifters and filters, flat lenses, and low-dispersive leaky-wave antennas.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130139093","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}
Multi-band, multi-function, and miniaturization are very desirable for late-mode wireless mobile devices. In this paper, a compact triple-band circularly-polarized directional antenna at 920MHz, 1600MHz, and 2450 MHz is proposed for UHF/ISM RFID mobile readers with GNSS band. The antenna consists of a two-feed network and stacked radiating patches. Measured result shows that the 10 dB impedance bandwidths are 24, 430, and 340 MHz with 3-dB axial ratio bandwidths of 13, 230, and 365 MHz for the three bands. In these bands, the antenna provides the symmetric radiation patterns and the peak gains of 3.7, 6.6, and 8.8 dBic, respectively. Comparison shows that the antenna not only features compact size, simple configuration, and low cost but also provides wide CP bandwidths. Moreover, the operating frequencies can be changed conveniently and the large frequency ratio of 2.8 is achieved. It is the first design to integrate the UHF/ISM RFID reader application and GNSS function into a single antenna.
{"title":"Compact triple-band circularly-polarized directional antenna for UHF/ISM RFID mobile readers with GNSS band","authors":"Yu Chen, Qiang Liu, X. Tang, Zhiguang Mo, Chen Li, Fuhai Li","doi":"10.1109/IWAT.2018.8379147","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379147","url":null,"abstract":"Multi-band, multi-function, and miniaturization are very desirable for late-mode wireless mobile devices. In this paper, a compact triple-band circularly-polarized directional antenna at 920MHz, 1600MHz, and 2450 MHz is proposed for UHF/ISM RFID mobile readers with GNSS band. The antenna consists of a two-feed network and stacked radiating patches. Measured result shows that the 10 dB impedance bandwidths are 24, 430, and 340 MHz with 3-dB axial ratio bandwidths of 13, 230, and 365 MHz for the three bands. In these bands, the antenna provides the symmetric radiation patterns and the peak gains of 3.7, 6.6, and 8.8 dBic, respectively. Comparison shows that the antenna not only features compact size, simple configuration, and low cost but also provides wide CP bandwidths. Moreover, the operating frequencies can be changed conveniently and the large frequency ratio of 2.8 is achieved. It is the first design to integrate the UHF/ISM RFID reader application and GNSS function into a single antenna.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114056190","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379203
Y. Liu, Yi Luo, S. Gong
An antenna with a small nonground portion for mobile phones are designed. With the lumped elements and optimized structure, the proposed antenna can cover octa-band applications. Meanwhile the simulated S parameters and radiation patterns can meet the demand. In addition, the structure is capable of being used for the metal frame configuration and forming a narrow frame antenna. Hence, it is a promising candidate for mobile phone applications.
{"title":"A novel antenna with a small nonground area for mobile phones","authors":"Y. Liu, Yi Luo, S. Gong","doi":"10.1109/IWAT.2018.8379203","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379203","url":null,"abstract":"An antenna with a small nonground portion for mobile phones are designed. With the lumped elements and optimized structure, the proposed antenna can cover octa-band applications. Meanwhile the simulated S parameters and radiation patterns can meet the demand. In addition, the structure is capable of being used for the metal frame configuration and forming a narrow frame antenna. Hence, it is a promising candidate for mobile phone applications.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"190 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132113547","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379236
Guanhua Huang, Z. Zhong, Tao Yuan Atr
It has been recognized that 3-D printing has attracted more and more interest in microwave engineering applications in recent years. Among various additive manufacturing techniques frequently categorized by printing materials, metal printing is a unique one for building objects from metallic powder. The process is totally different from the traditional machining method, which usually introduces some errors in terms of accuracy, alignment and assembly, inevitably deteriorating the performance of the devices, especially the efficiency at high frequency. This paper looks at the application of metal printing to microwave components and antennas. The advent and the maturing of the metal printing technology may revive the fortunes of these devices as designs that are previously difficult to fabricate can be now easily handled. Some newly developed examples implemented via metal printing technique are also included in this paper.
{"title":"3-D metal printing in microwave components and antennas applications","authors":"Guanhua Huang, Z. Zhong, Tao Yuan Atr","doi":"10.1109/IWAT.2018.8379236","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379236","url":null,"abstract":"It has been recognized that 3-D printing has attracted more and more interest in microwave engineering applications in recent years. Among various additive manufacturing techniques frequently categorized by printing materials, metal printing is a unique one for building objects from metallic powder. The process is totally different from the traditional machining method, which usually introduces some errors in terms of accuracy, alignment and assembly, inevitably deteriorating the performance of the devices, especially the efficiency at high frequency. This paper looks at the application of metal printing to microwave components and antennas. The advent and the maturing of the metal printing technology may revive the fortunes of these devices as designs that are previously difficult to fabricate can be now easily handled. Some newly developed examples implemented via metal printing technique are also included in this paper.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121714012","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379218
H. Jaafar, A. Sharaiha, S. Collardey
This paper presents the design of a compact parasitic superdirective array based on a wideband small antenna as a unit element. The unit element is internally loaded with inductive loads to have an optimized impedance bandwidth. Using a wideband antenna as a unit element in the array, ensures high directivity and radiation efficiency even at close distances. The final array design exhibits a maximal directivity of 7.5dBi at 880MHz with 94% radiation efficiency and 5.6% directivity bandwidth.
{"title":"A broadside efficient superdirective compact array with internally loaded wideband unit elements","authors":"H. Jaafar, A. Sharaiha, S. Collardey","doi":"10.1109/IWAT.2018.8379218","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379218","url":null,"abstract":"This paper presents the design of a compact parasitic superdirective array based on a wideband small antenna as a unit element. The unit element is internally loaded with inductive loads to have an optimized impedance bandwidth. Using a wideband antenna as a unit element in the array, ensures high directivity and radiation efficiency even at close distances. The final array design exhibits a maximal directivity of 7.5dBi at 880MHz with 94% radiation efficiency and 5.6% directivity bandwidth.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121034071","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379183
A. Dyck, M. Rösch, A. Tessmann, A. Leuther, M. Kuri, H. Massler, S. Wagner, D. Meder, B. Weismann-Thaden, M. Schlechtweg, O. Ambacher
In this paper we demonstrate an antenna for 300 GHz. The antenna is processed on quartz and consists of 2 quartz layers with 2 metal layers each, which are separated by benzocyclobutene (BCB). The edge length is 2 millimeters. Design, simulation and the analysis is done in CST Microwave Studio. Measurement is done after packaging on a brass disk. This work shows the design details, simulated results and measurement data of the presented antenna.
{"title":"A 300 GHz microstrip multilayered antenna on quartz substrate","authors":"A. Dyck, M. Rösch, A. Tessmann, A. Leuther, M. Kuri, H. Massler, S. Wagner, D. Meder, B. Weismann-Thaden, M. Schlechtweg, O. Ambacher","doi":"10.1109/IWAT.2018.8379183","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379183","url":null,"abstract":"In this paper we demonstrate an antenna for 300 GHz. The antenna is processed on quartz and consists of 2 quartz layers with 2 metal layers each, which are separated by benzocyclobutene (BCB). The edge length is 2 millimeters. Design, simulation and the analysis is done in CST Microwave Studio. Measurement is done after packaging on a brass disk. This work shows the design details, simulated results and measurement data of the presented antenna.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132664793","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379174
Lei Wang, J. Gómez-Tornero, O. Quevedo–Teruel
Leaky-wave antennas (LWAs) are well-known for the high directivity, wide impedance bandwidth, and the beam-scanning performance with frequency. However, in the system that requires high-speed data transfer, wide system band and high directivity, LWAs are struggling with their beam squint effect in the radiation patterns, which limits their applications. In this paper, a dispersive metasurface prism is loaded to a dispersive LWA, reducing the LWA's dispersion, to make the LWA wide band radiating at a specific direction. A substrate integrated waveguide (SIW) LWA is taken to demonstrate the proposed concept with metasurface prism implemented by metallic vias. Full-wave simulation results show that the proposed low-dispersive SIW LWA has the main radiating direction at φ=24°, with half-power beamwidth of 8°, steers only ±0.5° from 33 to 38 GHz.
{"title":"Dispersion reduced SIW leaky-wave antenna by loading metasurface prism","authors":"Lei Wang, J. Gómez-Tornero, O. Quevedo–Teruel","doi":"10.1109/IWAT.2018.8379174","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379174","url":null,"abstract":"Leaky-wave antennas (LWAs) are well-known for the high directivity, wide impedance bandwidth, and the beam-scanning performance with frequency. However, in the system that requires high-speed data transfer, wide system band and high directivity, LWAs are struggling with their beam squint effect in the radiation patterns, which limits their applications. In this paper, a dispersive metasurface prism is loaded to a dispersive LWA, reducing the LWA's dispersion, to make the LWA wide band radiating at a specific direction. A substrate integrated waveguide (SIW) LWA is taken to demonstrate the proposed concept with metasurface prism implemented by metallic vias. Full-wave simulation results show that the proposed low-dispersive SIW LWA has the main radiating direction at φ=24°, with half-power beamwidth of 8°, steers only ±0.5° from 33 to 38 GHz.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126754706","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 : 2018-03-01DOI: 10.1109/IWAT.2018.8379168
Zhi-Jie Yang, S. Xiao
In this study, a single-fed wideband implantable antenna that operates at the 2.4 GHz ISM band is designed for biomedical applications. The impedance bandwidth enhancement is achieved by combining two modes. One is the fundamental mode of center microstrip antenna, and anther additional mode is attained by the outside loop. The simulated impedance bandwidth and radiation patterns are studied in a cubic skin phantom. The simulated impedance bandwidth below −10 dB ranges from 2.24 to 2.59 GHz (35%). The proposed antenna mainly radiates in the off-body direction and has a peak gain of −20.8 dBi at boresight. The influence of dielectric properties and implant depth are also discussed. The sensitivity studies indicate the stability of our antenna.
{"title":"A wideband implantable antenna for 2.4 GHz ISM band biomedical application","authors":"Zhi-Jie Yang, S. Xiao","doi":"10.1109/IWAT.2018.8379168","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379168","url":null,"abstract":"In this study, a single-fed wideband implantable antenna that operates at the 2.4 GHz ISM band is designed for biomedical applications. The impedance bandwidth enhancement is achieved by combining two modes. One is the fundamental mode of center microstrip antenna, and anther additional mode is attained by the outside loop. The simulated impedance bandwidth and radiation patterns are studied in a cubic skin phantom. The simulated impedance bandwidth below −10 dB ranges from 2.24 to 2.59 GHz (35%). The proposed antenna mainly radiates in the off-body direction and has a peak gain of −20.8 dBi at boresight. The influence of dielectric properties and implant depth are also discussed. The sensitivity studies indicate the stability of our antenna.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121609195","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：