Pub Date : 2018-03-01DOI: 10.1109/IWAT.2018.8379234
Xinxin Tian, Y. Zhang
Via resonance effects which are caused by via stub and surrounding shorting vias are investigated in this paper by numerical simulation and theoretical calculation from a via-trace model on multilayer printed circuit boards. It is discovered that via stub can significantly worsen electric performance of the via transition and stub resonance can be eliminated by shortening via stub. For the case of a signal via surrounded by shorting vias, the vertical signal current flowing on the central signal via can excites resonant mode of circular waveguide resonator, which also generate via resonance.
{"title":"Analysis of via resonance in multi-layer printed circuit board","authors":"Xinxin Tian, Y. Zhang","doi":"10.1109/IWAT.2018.8379234","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379234","url":null,"abstract":"Via resonance effects which are caused by via stub and surrounding shorting vias are investigated in this paper by numerical simulation and theoretical calculation from a via-trace model on multilayer printed circuit boards. It is discovered that via stub can significantly worsen electric performance of the via transition and stub resonance can be eliminated by shortening via stub. For the case of a signal via surrounded by shorting vias, the vertical signal current flowing on the central signal via can excites resonant mode of circular waveguide resonator, which also generate via resonance.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"10 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":"125513476","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.2018.8379184
Jin-ping Zhang, Bin Li, Zhipeng Zhou
A substrate integrated waveguide (SIW) slot antenna for 79GHz applications is proposed in this paper. In order to get the high gain and lower losses, the antenna is designed as a sub-array composed with eight slots, which fabricated in the wide side plane of the SIW, and placed along the central axis with the equal interval of half waveguide wavelength. The slots can radiate the electromagnetic energy through the field disturbance caused by the plated-through hole (PTH) positioned beside the slots. The antenna is fed by the 50 û coaxial-fed structure located from the bottom of SIW. This bottom-fed method is different from the traditional microstrip feeding method, it has more convenience to extend the 2-dimensional phased array through multiple independent subarrays in the 79-GHz applications. The simulated results of the subarray indicate that the frequency band with |S11|<−10dB is from 78GHz to 80GHz, and the cross-polarization is lower than −50dB. An array model with 3×5 subarrays is also fabricated and simulated, it is found that the array radiation efficiency can be evaluated larger than 80%, and the patterns are also extremely well qualified. The performances confirm that the proposed SIW slot antenna is suitable for the millimeter-wave electronic systems with the requirement of array antenna.
{"title":"A substrate integrated waveguide slot antenna for 79-GHz applications","authors":"Jin-ping Zhang, Bin Li, Zhipeng Zhou","doi":"10.1109/IWAT.2018.8379184","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379184","url":null,"abstract":"A substrate integrated waveguide (SIW) slot antenna for 79GHz applications is proposed in this paper. In order to get the high gain and lower losses, the antenna is designed as a sub-array composed with eight slots, which fabricated in the wide side plane of the SIW, and placed along the central axis with the equal interval of half waveguide wavelength. The slots can radiate the electromagnetic energy through the field disturbance caused by the plated-through hole (PTH) positioned beside the slots. The antenna is fed by the 50 û coaxial-fed structure located from the bottom of SIW. This bottom-fed method is different from the traditional microstrip feeding method, it has more convenience to extend the 2-dimensional phased array through multiple independent subarrays in the 79-GHz applications. The simulated results of the subarray indicate that the frequency band with |S11|<−10dB is from 78GHz to 80GHz, and the cross-polarization is lower than −50dB. An array model with 3×5 subarrays is also fabricated and simulated, it is found that the array radiation efficiency can be evaluated larger than 80%, and the patterns are also extremely well qualified. The performances confirm that the proposed SIW slot antenna is suitable for the millimeter-wave electronic systems with the requirement of array antenna.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"17 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":"125515858","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.2018.8379193
Rong Lin Shao, Y. Zhou, Liu Yang, Y. Zhou, Chong Tan
This letter presents a meander-slot defected ground structure (DGS) for a two-element multiple-input-multiple-output (MIMO) antenna with high isolation. The two-monopole MIMO antenna operates at 1.8 GHz. The reduction of mutual couplings between the monopoles is achieved by suppressing the surface waves on the ground plane using the meander-slot DGS. The designed DGS has a very compact size of 10mm ×14 mm (0.06λ×0.08λ) suitable for practical design of MIMO antenna.
本文介绍了一种具有高隔离度的两元件多输入多输出（MIMO）天线的蜿蜒槽缺陷地面结构（DGS）。该双单极 MIMO 天线的工作频率为 1.8 GHz。通过使用蜿蜒槽 DGS 来抑制地平面上的表面波，从而减少了单极子之间的相互耦合。所设计的 DGS 尺寸非常小巧，仅为 10mm ×14mm (0.06λ×0.08λ)，适合 MIMO 天线的实际设计。
{"title":"Compact meander-slot DGS for MIMO antenna with high isolation","authors":"Rong Lin Shao, Y. Zhou, Liu Yang, Y. Zhou, Chong Tan","doi":"10.1109/IWAT.2018.8379193","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379193","url":null,"abstract":"This letter presents a meander-slot defected ground structure (DGS) for a two-element multiple-input-multiple-output (MIMO) antenna with high isolation. The two-monopole MIMO antenna operates at 1.8 GHz. The reduction of mutual couplings between the monopoles is achieved by suppressing the surface waves on the ground plane using the meander-slot DGS. The designed DGS has a very compact size of 10mm ×14 mm (0.06λ×0.08λ) suitable for practical design of MIMO antenna.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"59 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":"126224736","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.2018.8379250
Y. Cheng, Ze A Ehf
In this paper, a series of parallel-plate dielectric lens antennas (PPDLAs) is developed for the point-to-multipoint communication application. They have advantages of wideband and low profile. The beam scanning in the azimuth plane keeps almost unchanged. Besides, some of the developed PPDLAs have the ability to realize a limited beam scanning in the vertical plane. The substrate integrated waveguide (SIW) technology is employed in the design to construct the feeding network.
{"title":"Millimeter-wave parallel-plate cylindrical dielectric lens multi-beam array antenna for point-to-multipoint communication","authors":"Y. Cheng, Ze A Ehf","doi":"10.1109/IWAT.2018.8379250","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379250","url":null,"abstract":"In this paper, a series of parallel-plate dielectric lens antennas (PPDLAs) is developed for the point-to-multipoint communication application. They have advantages of wideband and low profile. The beam scanning in the azimuth plane keeps almost unchanged. Besides, some of the developed PPDLAs have the ability to realize a limited beam scanning in the vertical plane. The substrate integrated waveguide (SIW) technology is employed in the design to construct the feeding network.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"137 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":"122994208","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.2018.8379217
Yuanhua Sun, Yihe Liu, Nianqing Tang, Dajun Xu, Y. Li, Yong-can Yu, Kai Zhang, Quandeng Gou, Z. Du
This paper presents the design and implementation of a novel wide bandwidth end fire antenna with log-periodic directors. The feeding structure of the proposed antenna includes a balun which is formed using a pair of microstrip to slot line transitions. The proposed antenna has three resonant frequencies in the operating frequency band. Both simulation and measurement results show that the operating frequency band of the antenna for S11 < −10 dB covers the wide bandwidth (5GHz-10GHz), and the relative bandwidth is 67%. Far field measurements in azimuth plane and elevation plane show that the radiation patterns are stable and end fire within the operating band at frequencies of 5GHz, 7GHz, 8GHz, 10GHz. The proposed antenna radiates a well defined end fire beam, with a front-to-back ratio > 20dB and cross polarization level below −29dB. The dimension of the proposed antenna is 26mm × 27mm. Good return loss and radiation pattern characteristics are obtained and measured results are presented to validated the usefulness of the proposed antenna structure for wide bandwidth end fire applications.
{"title":"The design of end-fire antenna with log-period directors","authors":"Yuanhua Sun, Yihe Liu, Nianqing Tang, Dajun Xu, Y. Li, Yong-can Yu, Kai Zhang, Quandeng Gou, Z. Du","doi":"10.1109/IWAT.2018.8379217","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379217","url":null,"abstract":"This paper presents the design and implementation of a novel wide bandwidth end fire antenna with log-periodic directors. The feeding structure of the proposed antenna includes a balun which is formed using a pair of microstrip to slot line transitions. The proposed antenna has three resonant frequencies in the operating frequency band. Both simulation and measurement results show that the operating frequency band of the antenna for S11 < −10 dB covers the wide bandwidth (5GHz-10GHz), and the relative bandwidth is 67%. Far field measurements in azimuth plane and elevation plane show that the radiation patterns are stable and end fire within the operating band at frequencies of 5GHz, 7GHz, 8GHz, 10GHz. The proposed antenna radiates a well defined end fire beam, with a front-to-back ratio > 20dB and cross polarization level below −29dB. The dimension of the proposed antenna is 26mm × 27mm. Good return loss and radiation pattern characteristics are obtained and measured results are presented to validated the usefulness of the proposed antenna structure for wide bandwidth end fire applications.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"22 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":"122205571","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.2018.8379143
Y. Lu, Dou Wenbin
The bandwidth of ultrathin sheet absorber in low frequency is difficult to broaden, therefore, high permeability material is introduced in this paper. Finally, it realizes to broaden the frequency bandwidth and simulation analysis is carried out. At last, the absorption rate of the absorber between 1.15GHz and 2.37GHz is more than 90% with the thickness of 2.4mm and the absorber is insensitive to polarization and achieves high absorption rate in wide incidence angle.
{"title":"A low-frequency ultra-wideband absorber based on high permeability material","authors":"Y. Lu, Dou Wenbin","doi":"10.1109/IWAT.2018.8379143","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379143","url":null,"abstract":"The bandwidth of ultrathin sheet absorber in low frequency is difficult to broaden, therefore, high permeability material is introduced in this paper. Finally, it realizes to broaden the frequency bandwidth and simulation analysis is carried out. At last, the absorption rate of the absorber between 1.15GHz and 2.37GHz is more than 90% with the thickness of 2.4mm and the absorber is insensitive to polarization and achieves high absorption rate in wide incidence angle.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"35 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":"126610690","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.2018.8379221
Lei Wang, Jian Wang, Jin Shi
In this paper, a meandering-fed 4-layer stacked patch antenna is proposed to construct a 4×4 antenna array and achieve a high gain in a very limited area. The meandering-fed structure assures wide operation bandwidth. The 4-layer stacked patches contribute the high gain. The patch antennas with different layers are compared. The prototypes of antenna element and antenna array are simulated. The 10-dB impedance matching bandwidth of the proposed patch antenna array is 31% covering from 1.2 GHz to 1.64 GHz. The realized gain is change from 18.7 dBi to 20.5 dBi between 1.25 GHz and 1.55 GHz.
{"title":"Design of 4×4 meandering-fed stacked patch antenna array","authors":"Lei Wang, Jian Wang, Jin Shi","doi":"10.1109/IWAT.2018.8379221","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379221","url":null,"abstract":"In this paper, a meandering-fed 4-layer stacked patch antenna is proposed to construct a 4×4 antenna array and achieve a high gain in a very limited area. The meandering-fed structure assures wide operation bandwidth. The 4-layer stacked patches contribute the high gain. The patch antennas with different layers are compared. The prototypes of antenna element and antenna array are simulated. The 10-dB impedance matching bandwidth of the proposed patch antenna array is 31% covering from 1.2 GHz to 1.64 GHz. The realized gain is change from 18.7 dBi to 20.5 dBi between 1.25 GHz and 1.55 GHz.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"21 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":"127784848","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.2018.8379196
Wei-Bin Lu, Tsai-Sheng Chu, To-Po Wang
This study is based on wireless power transfer in the hope of minimizing that wireless charging is not only used in mobile phones, cars and other external items but can be implanted into the body to achieve the use of biological engineering. Proposed a modeling with I type ferrite core using in wireless power charging. A diameter be at 7 mm could use in biomedical area such as wireless charging. Derived a module be more precisely prediction using in radio wave propagation.
{"title":"Resonant modeling of wireless power transfer with miniaturized antenna using I type ferrite core in radio propagation for ISM band","authors":"Wei-Bin Lu, Tsai-Sheng Chu, To-Po Wang","doi":"10.1109/IWAT.2018.8379196","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379196","url":null,"abstract":"This study is based on wireless power transfer in the hope of minimizing that wireless charging is not only used in mobile phones, cars and other external items but can be implanted into the body to achieve the use of biological engineering. Proposed a modeling with I type ferrite core using in wireless power charging. A diameter be at 7 mm could use in biomedical area such as wireless charging. Derived a module be more precisely prediction using in radio wave propagation.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"348 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":"133316243","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.2018.8379186
Yanfei Li, W. Hong, Mingde Li, Guizhen Lu
The analysis for the assembling of non-uniform, linear arrays based on Genetic Algorithm is presented. The GA optimization techniques generate the locations of the elements for reducing the side-lobe level. Results are presented for the placement of 20 elements under the design of a 15.5 λ. linear array. The scanning properties of the designed arrays are also investigated. According to the optimized results, patch antenna arrays are simulated by Ansys HFSS software to verify the optimization technique.
{"title":"Unequally spaced linear antenna arrays synthesis based on genetic algorithm","authors":"Yanfei Li, W. Hong, Mingde Li, Guizhen Lu","doi":"10.1109/IWAT.2018.8379186","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379186","url":null,"abstract":"The analysis for the assembling of non-uniform, linear arrays based on Genetic Algorithm is presented. The GA optimization techniques generate the locations of the elements for reducing the side-lobe level. Results are presented for the placement of 20 elements under the design of a 15.5 λ. linear array. The scanning properties of the designed arrays are also investigated. According to the optimized results, patch antenna arrays are simulated by Ansys HFSS software to verify the optimization technique.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"47 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":"121721312","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.2018.8379209
Huan-Chu Huang
A simple, useful, and interesting rule named quasi-1/2 rule is presented to enable a quick estimation on the upper limit of the antenna efficiency. The studied upper limit of the antenna efficiency is based on assumptions that the antenna's power confinement in the near field and the related losses, such as the conductor losses and the substrate losses, can be ignored. In other words, all the received power by the antenna is radiated to the far field. The proposed quasi-1/2 rule is hence purely according to the VSWR (Voltage Standing Wave Ratio) values; therefore, it is an easy way to do a quick and helpful estimation and guidance without dimensions, structures, materials, etc., involved or known, which is especially beneficial to the antenna designers of cellular phones because of the complexity and uncertainty of the practical antenna environment in cellular phones. Moreover, the final result of the quasi-1/2 rule is just a single number, 1/2, which is very easy, simple, and straightforward to be memorized and applied.
{"title":"A Quasi-1/2 rule for quick estimation on the upper limit of the antenna efficiency","authors":"Huan-Chu Huang","doi":"10.1109/IWAT.2018.8379209","DOIUrl":"https://doi.org/10.1109/IWAT.2018.8379209","url":null,"abstract":"A simple, useful, and interesting rule named quasi-1/2 rule is presented to enable a quick estimation on the upper limit of the antenna efficiency. The studied upper limit of the antenna efficiency is based on assumptions that the antenna's power confinement in the near field and the related losses, such as the conductor losses and the substrate losses, can be ignored. In other words, all the received power by the antenna is radiated to the far field. The proposed quasi-1/2 rule is hence purely according to the VSWR (Voltage Standing Wave Ratio) values; therefore, it is an easy way to do a quick and helpful estimation and guidance without dimensions, structures, materials, etc., involved or known, which is especially beneficial to the antenna designers of cellular phones because of the complexity and uncertainty of the practical antenna environment in cellular phones. Moreover, the final result of the quasi-1/2 rule is just a single number, 1/2, which is very easy, simple, and straightforward to be memorized and applied.","PeriodicalId":212550,"journal":{"name":"2018 International Workshop on Antenna Technology (iWAT)","volume":"25 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":"121909073","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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