Pub Date : 2013-03-04DOI: 10.1109/IWAT.2013.6518290
C. Rusch, S. Beer, P. Pahl, H. Gulan, T. Zwick
A millimeter-wave holographic antenna array is presented. The combination of the holographic antenna principle with the phased array technology allows a beam steering functionality in two dimensions. The presented holographic antenna belongs to the leaky-wave antennas and can be described by Floquet's theorem. After a review about the theoretical aspects of holographic antennas, the paper focuses on possibilities to improve the beam scanning range. The presented simulation results of the developed antenna with Yagi-Uda-Feed on Alumina are verified by measurements.
{"title":"Electronic beam scanning in two dimensions with holographic phased array antenna","authors":"C. Rusch, S. Beer, P. Pahl, H. Gulan, T. Zwick","doi":"10.1109/IWAT.2013.6518290","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518290","url":null,"abstract":"A millimeter-wave holographic antenna array is presented. The combination of the holographic antenna principle with the phased array technology allows a beam steering functionality in two dimensions. The presented holographic antenna belongs to the leaky-wave antennas and can be described by Floquet's theorem. After a review about the theoretical aspects of holographic antennas, the paper focuses on possibilities to improve the beam scanning range. The presented simulation results of the developed antenna with Yagi-Uda-Feed on Alumina are verified by measurements.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122606384","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518357
T. Arima, T. Muto, T. Uno
The bi-static radars consist of transmitting antenna and receiving antenna. The antennas are placed side by side. However transmitted pulse from transmitting antenna is directly received by the receiving antenna. Therefore, if the radar and the target are close, transmitted pulse and wave which reflected from the target are observed to overlap each other and artificial image occurs. On the other hand, EBG (Electromagnetic Band-Gap) structure that is one of metamaterial reduces the electromagnetic coupling in specific frequency. This study proposed novel bi-static radar antenna that inserting EBG structures between the transmitting antennas.
{"title":"Bi-static radar antenna using EBG structure for shallow area detection","authors":"T. Arima, T. Muto, T. Uno","doi":"10.1109/IWAT.2013.6518357","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518357","url":null,"abstract":"The bi-static radars consist of transmitting antenna and receiving antenna. The antennas are placed side by side. However transmitted pulse from transmitting antenna is directly received by the receiving antenna. Therefore, if the radar and the target are close, transmitted pulse and wave which reflected from the target are observed to overlap each other and artificial image occurs. On the other hand, EBG (Electromagnetic Band-Gap) structure that is one of metamaterial reduces the electromagnetic coupling in specific frequency. This study proposed novel bi-static radar antenna that inserting EBG structures between the transmitting antennas.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"184 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117186591","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518297
O. P. Falade, Xiao-dong Chen, C. Parini
The design of a simple and compact broadband annular-ring slot circular polarized, slotted ground plane antenna, is presented. The antenna is fed by a single microstrip line place beneath the substrate. The circular polarized pattern has been achieved through the perturbation of the ring slots and proper optimization of the asymmetry stubs and the slotted ground plane. A better impedance bandwidth of about 1.23 GHz is achieved while the 3-dB axial ratio bandwidth of 984 MHz is obtained.
{"title":"Broadband circular polarized antenna for mobile communication applications","authors":"O. P. Falade, Xiao-dong Chen, C. Parini","doi":"10.1109/IWAT.2013.6518297","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518297","url":null,"abstract":"The design of a simple and compact broadband annular-ring slot circular polarized, slotted ground plane antenna, is presented. The antenna is fed by a single microstrip line place beneath the substrate. The circular polarized pattern has been achieved through the perturbation of the ring slots and proper optimization of the asymmetry stubs and the slotted ground plane. A better impedance bandwidth of about 1.23 GHz is achieved while the 3-dB axial ratio bandwidth of 984 MHz is obtained.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127114152","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518312
S. Varault, G. Boudarham, B. Rolly, B. Stout, N. Bonod
We explore how the magnetic contribution that may arise in nano-structures can help in the design of highly radiative or/and directive nano-antennas.
我们探讨了纳米结构中可能出现的磁贡献如何有助于高辐射或/和定向纳米天线的设计。
{"title":"Magneto-electric nano-antennas","authors":"S. Varault, G. Boudarham, B. Rolly, B. Stout, N. Bonod","doi":"10.1109/IWAT.2013.6518312","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518312","url":null,"abstract":"We explore how the magnetic contribution that may arise in nano-structures can help in the design of highly radiative or/and directive nano-antennas.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"445 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123228295","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518311
D. Mortazavi, A. Kouzani, L. Matekovits
It is demonstrated that the newly proposed nano-sinusoid shape has more resonance wavelength tunability than that other sharp-tip nano-particles such as nano-triangles and nano-diamonds. It is also show that an array of nano-sinusoids provides more enhancement at hot spots in comparison to other examined nano-particle shapes. This enhancement is analytically quantified using the coupling constant values used in the electrostatic eigenmode method for analytically solving Maxwell's equations for the nano-plasmonic devices. In addition, investigating LSPR spectrum of 2D arrays of NPs, demonstrates existence of enhanced surface electric fields on hot spots of the outer rows of the array.
{"title":"Localized surface plasmon resonance in nano-sinusoid arrays","authors":"D. Mortazavi, A. Kouzani, L. Matekovits","doi":"10.1109/IWAT.2013.6518311","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518311","url":null,"abstract":"It is demonstrated that the newly proposed nano-sinusoid shape has more resonance wavelength tunability than that other sharp-tip nano-particles such as nano-triangles and nano-diamonds. It is also show that an array of nano-sinusoids provides more enhancement at hot spots in comparison to other examined nano-particle shapes. This enhancement is analytically quantified using the coupling constant values used in the electrostatic eigenmode method for analytically solving Maxwell's equations for the nano-plasmonic devices. In addition, investigating LSPR spectrum of 2D arrays of NPs, demonstrates existence of enhanced surface electric fields on hot spots of the outer rows of the array.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127640928","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518325
A. Thiel, L. Ekiz, O. Klemp, M. Schultz
Multiple-input-multiple-output (MIMO) is a technique to achieve high data rates in mobile communication networks and is used by the Long-Term Evolution (LTE) standard. The integration of a two antenna MIMO system for usage in worldwide LTE networks into a conventional automotive roof top antenna is discussed. In-situ antenna measurement results of the final LTE MIMO configuration are shown. Furthermore initial test results of the integrated LTE antenna system in an 800 MHz live network are presented and a comparison to a reference system consisting of two quarter-wavelength monopole antennas with ideal spatial separation is provided.
{"title":"Automotive grade MIMO antenna setup and performance evaluation for LTE-communications","authors":"A. Thiel, L. Ekiz, O. Klemp, M. Schultz","doi":"10.1109/IWAT.2013.6518325","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518325","url":null,"abstract":"Multiple-input-multiple-output (MIMO) is a technique to achieve high data rates in mobile communication networks and is used by the Long-Term Evolution (LTE) standard. The integration of a two antenna MIMO system for usage in worldwide LTE networks into a conventional automotive roof top antenna is discussed. In-situ antenna measurement results of the final LTE MIMO configuration are shown. Furthermore initial test results of the integrated LTE antenna system in an 800 MHz live network are presented and a comparison to a reference system consisting of two quarter-wavelength monopole antennas with ideal spatial separation is provided.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133578140","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518286
R. Mittra
Designing small antennas is a very challenging problem, which has received the attention of a whole host of workers during the last five decades. It was recognized very early on, by researchers such as Chu, Harrington and their contemporaries, that there are some fundamental limits of realizable gain, bandwidth and efficiency of small antennas that are determined by the size of the sphere within which the antenna can be embedded, and that these limits cannot be overcome by using different materials or geometrical configurations of the antenna so long as it remained confined within the given sphere. Small antennas which attempted to “fill” the space within the sphere to reach the Chu-Harrington limit were designed by many workers, one of the principals among them being Best [1, 2]. Some of Best's designs are shown in Fig.1.
{"title":"A look at the small antenna design problem from a practitioner's viewpoint","authors":"R. Mittra","doi":"10.1109/IWAT.2013.6518286","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518286","url":null,"abstract":"Designing small antennas is a very challenging problem, which has received the attention of a whole host of workers during the last five decades. It was recognized very early on, by researchers such as Chu, Harrington and their contemporaries, that there are some fundamental limits of realizable gain, bandwidth and efficiency of small antennas that are determined by the size of the sphere within which the antenna can be embedded, and that these limits cannot be overcome by using different materials or geometrical configurations of the antenna so long as it remained confined within the given sphere. Small antennas which attempted to “fill” the space within the sphere to reach the Chu-Harrington limit were designed by many workers, one of the principals among them being Best [1, 2]. Some of Best's designs are shown in Fig.1.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131769971","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518299
Shen Wang, H. Arai, Huiling Jiang, Keizo Cho, Shoukan Li
An orthogonally dual-polarized composite antenna for indoor MIMO base station is introduced in this paper. The composite antenna consists of a vertically polarized disk loaded monopole and a horizontally polarized notch array. The proposed antenna has not only very compact structures and low profile, but also enhanced impedance bandwidths of over 300 MHz for the disk loaded monopole and 155 MHz for the notch array. Besides, the antenna has omni-directivity in horizontal plane to satisfy the requirement of indoor ceiling base station.
{"title":"Bandwidth enhancement of a compact dual-polarized indoor base station antenna","authors":"Shen Wang, H. Arai, Huiling Jiang, Keizo Cho, Shoukan Li","doi":"10.1109/IWAT.2013.6518299","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518299","url":null,"abstract":"An orthogonally dual-polarized composite antenna for indoor MIMO base station is introduced in this paper. The composite antenna consists of a vertically polarized disk loaded monopole and a horizontally polarized notch array. The proposed antenna has not only very compact structures and low profile, but also enhanced impedance bandwidths of over 300 MHz for the disk loaded monopole and 155 MHz for the notch array. Besides, the antenna has omni-directivity in horizontal plane to satisfy the requirement of indoor ceiling base station.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129314211","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518362
D. Awan, S. Bashir, S. Khan, H. Ali
High gain antennas are often used in communication systems to meet specific coverage requirements. This paper presents the gain enhancement technique for UWB antennas. Two reference UWB antennas are considered and their gain has been increased by 2.4dB using parasitic patch in stacked arrangement. The band notch UWB antenna has also been shown to show this increase in gain in the pass band. Finally, the reflector is added which further increase the gain by 5.91dB.
{"title":"Gain enhancement of UWB antennas with and without band notch feature","authors":"D. Awan, S. Bashir, S. Khan, H. Ali","doi":"10.1109/IWAT.2013.6518362","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518362","url":null,"abstract":"High gain antennas are often used in communication systems to meet specific coverage requirements. This paper presents the gain enhancement technique for UWB antennas. Two reference UWB antennas are considered and their gain has been increased by 2.4dB using parasitic patch in stacked arrangement. The band notch UWB antenna has also been shown to show this increase in gain in the pass band. Finally, the reflector is added which further increase the gain by 5.91dB.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129399184","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518292
Chi-Yuk Chiu, Xufeng Liu, Fei Gao, Z. Ying
Two antennas, main and sub, are used for reception in Long Term Evolution (LTE) terminals nowadays. In order to have a good MIMO performance, low coupling loss and low correlation between antennas are considered. Currently, main antenna usually situates at the bottom of the phone because of Specific Absorption Rate (SAR) requirement, whereas sub antenna locates at the top of the phone providing better spatial diversity. In this paper, feasible implementations of scatterers on both non-metallic and metallic chassis phones are provided. Experimental results show that the Envelope Correlation Coefficients (ECC) can be reduced from 0.7 to 0.2 at 750 MHz after inserting scatterers. Dual-frequency operations are also possible if two scatterers are introduced on different sides of a phone chassis.
{"title":"Reduction of Envelope Correlation on non-metallic and metallic chassis phones","authors":"Chi-Yuk Chiu, Xufeng Liu, Fei Gao, Z. Ying","doi":"10.1109/IWAT.2013.6518292","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518292","url":null,"abstract":"Two antennas, main and sub, are used for reception in Long Term Evolution (LTE) terminals nowadays. In order to have a good MIMO performance, low coupling loss and low correlation between antennas are considered. Currently, main antenna usually situates at the bottom of the phone because of Specific Absorption Rate (SAR) requirement, whereas sub antenna locates at the top of the phone providing better spatial diversity. In this paper, feasible implementations of scatterers on both non-metallic and metallic chassis phones are provided. Experimental results show that the Envelope Correlation Coefficients (ECC) can be reduced from 0.7 to 0.2 at 750 MHz after inserting scatterers. Dual-frequency operations are also possible if two scatterers are introduced on different sides of a phone chassis.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125015858","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：