Pub Date : 2018-03-01DOI: 10.1109/IWAT.2018.8379139
Guowen Ding, Ke Chen, Yijun Feng
We use the phased-array model to theoretically analyze the conical beam-shaping. It shows that the cone angle of the conical beam can be arbitrarily controlled by just changing the initial phase excitation distribution on the array. Based on this mechanism, a passive reflective metasurface is designed to generate conical beam with certain cone angle. The metasurface element, designed based on the concept of geometric phase, is composed of two orthogonal I-shaped metallic structures etched on a back-grounded dielectric substrate. Under the normal illumination of left-circularly polarized incidence, left-circularly polarized conical wave can be obtained at 15.5 GHz with a cone angle of 13.6 degree. Simulation and measurement are carried out to validate the theoretical prediction, which show good agreement with each other.
{"title":"Generation of conical beam by reflective metasurface","authors":"Guowen Ding, Ke Chen, Yijun Feng","doi":"10.1109/IWAT.2018.8379139","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379139","url":null,"abstract":"We use the phased-array model to theoretically analyze the conical beam-shaping. It shows that the cone angle of the conical beam can be arbitrarily controlled by just changing the initial phase excitation distribution on the array. Based on this mechanism, a passive reflective metasurface is designed to generate conical beam with certain cone angle. The metasurface element, designed based on the concept of geometric phase, is composed of two orthogonal I-shaped metallic structures etched on a back-grounded dielectric substrate. Under the normal illumination of left-circularly polarized incidence, left-circularly polarized conical wave can be obtained at 15.5 GHz with a cone angle of 13.6 degree. Simulation and measurement are carried out to validate the theoretical prediction, which show good agreement with each other.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"258 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":"116059716","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}
We have proposed and investigated a high-gain and broadband dielectric resonator antenna (DRA) array with simplified substrate-integrated-waveguide (SIW) feed network for 67GHz band in this paper. A double-layered SIW feeding network with wideband H-junction and wideband high-gain slot dielectric resonator antenna array is employed to achieve high gain and wideband performance simultaneously. The simulated impedance bandwidth of 15% and a gain up to 13.9 dB have been offered. Together with the advantages of low-profile and low fabrication costs, the proposed antenna array could serve as a promising candidate for millimeter-wave wireless communication systems.
{"title":"A high-gain and broadband dielectric resonator antenna array with substrate-integrated-waveguide feed network for 67GHz","authors":"Changan Shen, Zhijiao Chen, L. Qi, Xiaoming Liu, Yuan Yao, Junsheng Yu, Xiao-dong Chen","doi":"10.1109/IWAT.2018.8379172","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379172","url":null,"abstract":"We have proposed and investigated a high-gain and broadband dielectric resonator antenna (DRA) array with simplified substrate-integrated-waveguide (SIW) feed network for 67GHz band in this paper. A double-layered SIW feeding network with wideband H-junction and wideband high-gain slot dielectric resonator antenna array is employed to achieve high gain and wideband performance simultaneously. The simulated impedance bandwidth of 15% and a gain up to 13.9 dB have been offered. Together with the advantages of low-profile and low fabrication costs, the proposed antenna array could serve as a promising candidate for millimeter-wave wireless communication systems.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"41 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":"116631871","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.2018.8379149
Q.C. Zhang, X.L. Zhang, Q. Lai
In this paper, a two-dimensional electronically-scanning phased array for X-band application is presented. The proposed antenna consists of 256 elements, providing ± 30° scanning range in azimuth and elevation plane. The array elements are placed in the order of λ/2 at the middle frequency in two principal planes. The simple structure is very popular in phased array due to easy processing, and low cost. Details of the proposed antenna design are described and simulated results are presented.
{"title":"Two-dimensional electronically-scanning phased array antenna","authors":"Q.C. Zhang, X.L. Zhang, Q. Lai","doi":"10.1109/IWAT.2018.8379149","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379149","url":null,"abstract":"In this paper, a two-dimensional electronically-scanning phased array for X-band application is presented. The proposed antenna consists of 256 elements, providing ± 30° scanning range in azimuth and elevation plane. The array elements are placed in the order of λ/2 at the middle frequency in two principal planes. The simple structure is very popular in phased array due to easy processing, and low cost. Details of the proposed antenna design are described and simulated results are presented.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"204 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":"122672366","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.2018.8379135
Qi Wu, Jiexi Yin, Chen Yu, Haiming Wang, W. Hong, J. Hirokawa
Using travelling-wave elements, two planar antenna arrays are developed for millimeter-wave wideband circularly polarized (CP) applications. First, the aperture-fed travelling-wave element is designed. Stacked curl element is printed on the surface of the substrate to realize wideband axial ratio (AR) and impedance performance. Then, two antenna arrays using substrate integrated waveguide (SIW) and microstrip feeding networks are developed, respectively. Performance comparison between these two arrays are discussed. Finally, the wideband CP antenna array which is fed by the SIW network is fabricated and measured. The measured impedance bandwidth of the array is 35.4%, 3-dB AR bandwidth is 33.8%, and 3-dB gain bandwidth is 32.2% with a peak gain of 23.5 dBic. The overall bandwidth is 30.6% and good efficiency of about 70% is obtained because of the low-loss full-corporate SIW feeding scheme.
{"title":"Millimeter-wave wideband circularly polarized antenna arrays using travelling-wave elements","authors":"Qi Wu, Jiexi Yin, Chen Yu, Haiming Wang, W. Hong, J. Hirokawa","doi":"10.1109/IWAT.2018.8379135","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379135","url":null,"abstract":"Using travelling-wave elements, two planar antenna arrays are developed for millimeter-wave wideband circularly polarized (CP) applications. First, the aperture-fed travelling-wave element is designed. Stacked curl element is printed on the surface of the substrate to realize wideband axial ratio (AR) and impedance performance. Then, two antenna arrays using substrate integrated waveguide (SIW) and microstrip feeding networks are developed, respectively. Performance comparison between these two arrays are discussed. Finally, the wideband CP antenna array which is fed by the SIW network is fabricated and measured. The measured impedance bandwidth of the array is 35.4%, 3-dB AR bandwidth is 33.8%, and 3-dB gain bandwidth is 32.2% with a peak gain of 23.5 dBic. The overall bandwidth is 30.6% and good efficiency of about 70% is obtained because of the low-loss full-corporate SIW feeding scheme.","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":"130016184","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.2018.8379156
Peng Kong, Yun He, Xiaowei Yu, L. Miao, Jianjun Jiang
A wideband switchable frequency selective surface (FSS) absorber/reflector for 4–8 GHz application is presented. Finite element method simulation shows that improved double split-ring's mutual effect along with coupled resonance could help achieve wideband switchable properties. Practical wideband absorption and switchable performances are accomplished based on series switches and isolative bias network. The measurement results show that the absorption of switchable FSS in the OFF state is wide and strong with a satisfied reflection in the ON state. The wideband switchable FSS absorber/reflector is valuable in the field of smart stealth system.
{"title":"Wideband switchable frequency selective surfaces absorber/reflector","authors":"Peng Kong, Yun He, Xiaowei Yu, L. Miao, Jianjun Jiang","doi":"10.1109/IWAT.2018.8379156","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379156","url":null,"abstract":"A wideband switchable frequency selective surface (FSS) absorber/reflector for 4–8 GHz application is presented. Finite element method simulation shows that improved double split-ring's mutual effect along with coupled resonance could help achieve wideband switchable properties. Practical wideband absorption and switchable performances are accomplished based on series switches and isolative bias network. The measurement results show that the absorption of switchable FSS in the OFF state is wide and strong with a satisfied reflection in the ON state. The wideband switchable FSS absorber/reflector is valuable in the field of smart stealth system.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"58 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":"124538706","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.2018.8379231
Wang He, Bo Xu, Sailing He, Z. Ying
In the millimeter-wave frequencies, the dosimetric quantity for human exposure to electromagnetic fields changes from the specific absorption rate to incident power density. In this study, we used 28 GHz various fixed-beam patch arrays and plane waves to investigate the temperature elevation in a multilayer model of human heads and its correlation with incident power density in free space. The results show that the averaging area of a few square-centimeters may be a good candidate for the spatial-average power density. The findings provide valuable input to the ongoing revision and updating of relevant safety standards and guidelines.
{"title":"EMF exposure study of multilayer human head model at close distance of 28 GHz patch arrays","authors":"Wang He, Bo Xu, Sailing He, Z. Ying","doi":"10.1109/IWAT.2018.8379231","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379231","url":null,"abstract":"In the millimeter-wave frequencies, the dosimetric quantity for human exposure to electromagnetic fields changes from the specific absorption rate to incident power density. In this study, we used 28 GHz various fixed-beam patch arrays and plane waves to investigate the temperature elevation in a multilayer model of human heads and its correlation with incident power density in free space. The results show that the averaging area of a few square-centimeters may be a good candidate for the spatial-average power density. The findings provide valuable input to the ongoing revision and updating of relevant safety standards and guidelines.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"2 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":"121808481","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.2018.8379175
S. Ta, Chien Ngoc Dao, K. E. Kedze, I. Park
This paper presents a low-profile, broadband, circularly polarized (CP) antenna. It is composed of a single-feed crossed dipole loaded with four parasitic patches. Due to the presence of parasitic patches, the antenna achieves a low profile and a broadband characteristic in terms of impedance matching and CP radiation bandwidth. The final design, which has an overall size of 120 mm × 120 mm 0╫ 16.3 mm (0.64λ0 × 0.64λ0 × 0.087λ0 at 1.6 GHz), yields a −10 dB impedance bandwidth of 1.39–1.75 GHz (22.93%), a 3-dB axial ratio bandwidth of 1.472–1.684 GHz (13.4%), a right-hand CP broadside gain of > 8.4 dBic, and a radiation efficiency of > 96%.
本文提出了一种低轮廓、宽带圆极化(CP)天线。它是由一个单馈交叉偶极子负载四个寄生补丁。由于寄生斑块的存在，天线在阻抗匹配和CP辐射带宽方面实现了低轮廓和宽带特性。最终设计的总体尺寸为120 mm × 120 mm 0╫16.3 mm (1.6 GHz时0.64λ0 × 0.64λ0 × 0.087λ0)，产生- 10 dB阻抗带宽为1.39-1.75 GHz (22.93%)， 3 dB轴比带宽为1.472-1.684 GHz(13.4%)，右侧CP宽增益> 8.4 dBic，辐射效率> 96%。
{"title":"Low-profile crossed-dipole antenna loaded with parasitic patches","authors":"S. Ta, Chien Ngoc Dao, K. E. Kedze, I. Park","doi":"10.1109/IWAT.2018.8379175","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379175","url":null,"abstract":"This paper presents a low-profile, broadband, circularly polarized (CP) antenna. It is composed of a single-feed crossed dipole loaded with four parasitic patches. Due to the presence of parasitic patches, the antenna achieves a low profile and a broadband characteristic in terms of impedance matching and CP radiation bandwidth. The final design, which has an overall size of 120 mm × 120 mm 0╫ 16.3 mm (0.64λ<inf>0</inf> × 0.64λ<inf>0</inf> × 0.087λ<inf>0</inf> at 1.6 GHz), yields a −10 dB impedance bandwidth of 1.39–1.75 GHz (22.93%), a 3-dB axial ratio bandwidth of 1.472–1.684 GHz (13.4%), a right-hand CP broadside gain of > 8.4 dBic, and a radiation efficiency of > 96%.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"28 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":"116127354","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.2018.8379167
K. Saito, K. Nishino, R. Takei, T. Nagaoka, Soichi Watanabe, Masaharu Takahashi
In recent years, many types of mobile radio devices are used in close vicinity of our body. Along with the situation, electromagnetic energy absorption evaluated by specific absorption rate (SAR) radiated from the mobile radio terminal such as cellular phone has been investigated. In this study, changing the point of view, the SAR by a wireless local area network (LAN) router, which is sometimes installed around our body, was evaluated employing numerical calculations and measurements. As a result, the SAR distributions around the antenna were revealed.
{"title":"SAR evaluations of phantom surface close to antenna for wireless LAN router","authors":"K. Saito, K. Nishino, R. Takei, T. Nagaoka, Soichi Watanabe, Masaharu Takahashi","doi":"10.1109/IWAT.2018.8379167","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379167","url":null,"abstract":"In recent years, many types of mobile radio devices are used in close vicinity of our body. Along with the situation, electromagnetic energy absorption evaluated by specific absorption rate (SAR) radiated from the mobile radio terminal such as cellular phone has been investigated. In this study, changing the point of view, the SAR by a wireless local area network (LAN) router, which is sometimes installed around our body, was evaluated employing numerical calculations and measurements. As a result, the SAR distributions around the antenna were revealed.","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":"131047463","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.2018.8379158
Liyang Li, Jun Wang, Mingde Feng, Jiafu Wang, Hua Ma, Hongya Chen, Hongliang Du, Jie-qiu Zhang, S. Qu
In this paper, a frequency selective polarization conversion metasurface is designed based on E-shaped high permittivity ceramics. A frequency selective polarization conversion is realized in 10.95GHz∼12.069GHz. Two magnetic resonances are generated, which lead to the cross-polarization reflection. The simulated results show that the maximum conversion efficiency is nearly 100% at the two resonant frequencies. In this paper, high permittivity ceramic material is used to design all-dielectric metasurface in microwave band. As an alternative method to design frequency selective polarization conversion metasurface, high permittivity ceramics provide potential applications in high temperature or high power.
{"title":"Frequency selective polarization conversion metasurface using E-shaped high permittivity ceramics","authors":"Liyang Li, Jun Wang, Mingde Feng, Jiafu Wang, Hua Ma, Hongya Chen, Hongliang Du, Jie-qiu Zhang, S. Qu","doi":"10.1109/iwat.2018.8379158","DOIUrl":"https://doi.org/10.1109/iwat.2018.8379158","url":null,"abstract":"In this paper, a frequency selective polarization conversion metasurface is designed based on E-shaped high permittivity ceramics. A frequency selective polarization conversion is realized in 10.95GHz∼12.069GHz. Two magnetic resonances are generated, which lead to the cross-polarization reflection. The simulated results show that the maximum conversion efficiency is nearly 100% at the two resonant frequencies. In this paper, high permittivity ceramic material is used to design all-dielectric metasurface in microwave band. As an alternative method to design frequency selective polarization conversion metasurface, high permittivity ceramics provide potential applications in high temperature or high power.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"87 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114042451","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}
This paper presents a simple and efficient method for the design of a frequency tunable self-diplexed antenna based on loading asymmetric grounding-vias. The structure consists of two antenna elements loaded with two asymmetric grounding-vias, specifying the uplink and downlink operation frequencies. By choosing the appropriate positions of the two grounding-vias, high isolation between the two antennas can be achieved. Results verify the multi-functionalities of the proposed compact structure in terms of frequency-tunability, high isolation and low cross-polarization discrimination.
{"title":"Self-diplexed antenna based on loading asymmetric grounding-vias","authors":"Jia-jun Liang, Guan-long Huang, Wei Xu, Tao Yuan, Shengli Zhang, Guang-min Zhang","doi":"10.1002/mmce.21243","DOIUrl":"https://doi.org/10.1002/mmce.21243","url":null,"abstract":"This paper presents a simple and efficient method for the design of a frequency tunable self-diplexed antenna based on loading asymmetric grounding-vias. The structure consists of two antenna elements loaded with two asymmetric grounding-vias, specifying the uplink and downlink operation frequencies. By choosing the appropriate positions of the two grounding-vias, high isolation between the two antennas can be achieved. Results verify the multi-functionalities of the proposed compact structure in terms of frequency-tunability, high isolation and low cross-polarization discrimination.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"16 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":"119438326","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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