Pub Date : 2014-10-20DOI: 10.1109/USNC-URSI-NRSM.2014.6927961
F. Kaburcuk, V. Demir, A. Elsherbeni, E. Arvas
The integration of the finite-difference time-domain method (FDTD) into the iterative multi-region (IMR) technique, an iterative approach used to solve large-scale electromagnetic problems, is presented in this paper. Solution of large scale problems has been one of the major challenges of computational electromagnetics. One approach to address this problem is to divide a problem space into smaller subregions and combine the solutions of subregions, after multiple interactions, to achieve the solution for the large domain. Solution of the subregions using frequency domain solvers has been the preferred approach as such solutions using time domain solvers require computationally expensive bookkeeping of time signals. In this contribution we present an algorithm that makes it feasible to use the FDTD method, a time domain numerical technique, in the IMR technique to achieve solutions at a number of pre-specified frequencies.
{"title":"Integration of the FDTD method into the iterative multi-region technique for scattering from multiple three dimensional objects","authors":"F. Kaburcuk, V. Demir, A. Elsherbeni, E. Arvas","doi":"10.1109/USNC-URSI-NRSM.2014.6927961","DOIUrl":"https://doi.org/10.1109/USNC-URSI-NRSM.2014.6927961","url":null,"abstract":"The integration of the finite-difference time-domain method (FDTD) into the iterative multi-region (IMR) technique, an iterative approach used to solve large-scale electromagnetic problems, is presented in this paper. Solution of large scale problems has been one of the major challenges of computational electromagnetics. One approach to address this problem is to divide a problem space into smaller subregions and combine the solutions of subregions, after multiple interactions, to achieve the solution for the large domain. Solution of the subregions using frequency domain solvers has been the preferred approach as such solutions using time domain solvers require computationally expensive bookkeeping of time signals. In this contribution we present an algorithm that makes it feasible to use the FDTD method, a time domain numerical technique, in the IMR technique to achieve solutions at a number of pre-specified frequencies.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"17 1","pages":"506-507"},"PeriodicalIF":0.0,"publicationDate":"2014-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84522531","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 : 2014-10-01DOI: 10.1587/TRANSCOM.E97.B.2050
M. Sumi, Keizo Cho
This paper proposes a new small multiband printed antenna for wireless telecommunications modules that actualizes Machine to Machine applications. We reconfigure our previous antenna to cover the 700 MHz, 800 MHz, and 900 MHz bands, and add two new elements to cover the 2 GHz band. The new antenna achieves operation in quad-bands: 700 MHz, 800 MHz, 900 MHz, and 2 GHz. Frequency characteristics are analyzed using a simulator based on the method of moments, and the validity of the numerical results is shown based on measured Voltage Standing Wave Ratio characteristics and the radiation patterns of the prototype antenna.
{"title":"Small quad-band printed antenna comprising symmetrically arranged trapezoidal elements and rectangle strip elements","authors":"M. Sumi, Keizo Cho","doi":"10.1587/TRANSCOM.E97.B.2050","DOIUrl":"https://doi.org/10.1587/TRANSCOM.E97.B.2050","url":null,"abstract":"This paper proposes a new small multiband printed antenna for wireless telecommunications modules that actualizes Machine to Machine applications. We reconfigure our previous antenna to cover the 700 MHz, 800 MHz, and 900 MHz bands, and add two new elements to cover the 2 GHz band. The new antenna achieves operation in quad-bands: 700 MHz, 800 MHz, 900 MHz, and 2 GHz. Frequency characteristics are analyzed using a simulator based on the method of moments, and the validity of the numerical results is shown based on measured Voltage Standing Wave Ratio characteristics and the radiation patterns of the prototype antenna.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"27 1","pages":"386-387"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80791589","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 : 2014-09-22DOI: 10.1109/APS.2014.6904652
Ru Meng, Heng Zhang, B. Muneer, Qi Zhu
A 48-way high power capacity (HPC) sectorial waveguide power divider in X band is designed. The design approach and simple analysis of the power divider are discussed. The simulated results demonstrate that the maximum magnitude difference among all outputs is 0.8 dB, and the maximum phase difference is 9°. The 20 dB return loss bandwidth is 900 MHz from 8.9 GHz to 9.8 GHz. The power handling capability of the divider reaches 2.7 GW in vacuum state. The proposed power divider has the advantages of simple fabrication, low insertion-loss and high power capacity.
{"title":"The design of a 48-way high power capacity sectorial waveguide power divider","authors":"Ru Meng, Heng Zhang, B. Muneer, Qi Zhu","doi":"10.1109/APS.2014.6904652","DOIUrl":"https://doi.org/10.1109/APS.2014.6904652","url":null,"abstract":"A 48-way high power capacity (HPC) sectorial waveguide power divider in X band is designed. The design approach and simple analysis of the power divider are discussed. The simulated results demonstrate that the maximum magnitude difference among all outputs is 0.8 dB, and the maximum phase difference is 9°. The 20 dB return loss bandwidth is 900 MHz from 8.9 GHz to 9.8 GHz. The power handling capability of the divider reaches 2.7 GW in vacuum state. The proposed power divider has the advantages of simple fabrication, low insertion-loss and high power capacity.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"55 1","pages":"643-644"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83623987","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 : 2014-09-22DOI: 10.1109/APS.2014.6904953
C. Borda Fortuny, K. Tong, K. Chetty, D. Benton
This article proposes a frequency agile antenna whose operating frequency band can be switched. The design is based on a Vivaldi antenna. High-performance radio-frequency microelectromechanical system (RF-MEMS) switches are used to realize the 2.7 GHz and 3.9 GHz band switching. The low band starts from 2.33 GHz and works until 3.02 GHz and the high band ranges from 3.29 GHz up to 4.58 GHz. The average gains of the antenna at the low and high bands are 10.9 and 12.5 dBi, respectively. This high-gain frequency reconfigurable antenna could replace several narrowband antennas for reducing costs and space to support multiple communication systems, while maintaining good performance.
{"title":"High-gain frequency reconfigurable Vivaldi antenna","authors":"C. Borda Fortuny, K. Tong, K. Chetty, D. Benton","doi":"10.1109/APS.2014.6904953","DOIUrl":"https://doi.org/10.1109/APS.2014.6904953","url":null,"abstract":"This article proposes a frequency agile antenna whose operating frequency band can be switched. The design is based on a Vivaldi antenna. High-performance radio-frequency microelectromechanical system (RF-MEMS) switches are used to realize the 2.7 GHz and 3.9 GHz band switching. The low band starts from 2.33 GHz and works until 3.02 GHz and the high band ranges from 3.29 GHz up to 4.58 GHz. The average gains of the antenna at the low and high bands are 10.9 and 12.5 dBi, respectively. This high-gain frequency reconfigurable antenna could replace several narrowband antennas for reducing costs and space to support multiple communication systems, while maintaining good performance.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"46 1","pages":"1252-1253"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90258266","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 : 2014-09-22DOI: 10.1109/APS.2014.6905126
Di Yang, Xianling Liang, R. Jin, Jun-ping Geng
A novel coplanar waveguide fed printed rectangular slot antenna is proposed in this paper, which consists of a substrate layer of the CPW-fed rectangular slot antenna, a composite cavity, and a SMA connector with the vertical transition structure. The simulated results indicate that the antenna has the 10dB impedance bandwidth of 49%, the 3-dB beamwidth of exceeding 107° in E-plane, the gain of 6dBi, and with a compact size.
{"title":"A broadband printed slot antenna with wide E-plane beamwidth","authors":"Di Yang, Xianling Liang, R. Jin, Jun-ping Geng","doi":"10.1109/APS.2014.6905126","DOIUrl":"https://doi.org/10.1109/APS.2014.6905126","url":null,"abstract":"A novel coplanar waveguide fed printed rectangular slot antenna is proposed in this paper, which consists of a substrate layer of the CPW-fed rectangular slot antenna, a composite cavity, and a SMA connector with the vertical transition structure. The simulated results indicate that the antenna has the 10dB impedance bandwidth of 49%, the 3-dB beamwidth of exceeding 107° in E-plane, the gain of 6dBi, and with a compact size.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"37 1","pages":"1600-1601"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79051537","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 : 2014-09-22DOI: 10.1109/APS.2014.6904355
A. Densmore, Y. Rahmat-Samii
The three-parameter (3P) elliptical aperture distribution, which as previously published had been limited to sum patterns, is complemented with a variation that applies to difference patterns. The parameter values are determined by particle swarm optimization (PSO) to meet particular system modeling performance requirements. The new distribution is suitable for system modeling of tracking antenna applications and can maximize relative angle sensitivity while minimizing clutter from sidelobes. The equations for relative angle sensitivity for the difference pattern are presented. A multi-objective PSO example is presented, optimizing the tradeoff between peak sidelobe level and relative angle sensitivity.
{"title":"Three-parameter elliptical aperture distributions for difference patterns by particle swarm optimization","authors":"A. Densmore, Y. Rahmat-Samii","doi":"10.1109/APS.2014.6904355","DOIUrl":"https://doi.org/10.1109/APS.2014.6904355","url":null,"abstract":"The three-parameter (3P) elliptical aperture distribution, which as previously published had been limited to sum patterns, is complemented with a variation that applies to difference patterns. The parameter values are determined by particle swarm optimization (PSO) to meet particular system modeling performance requirements. The new distribution is suitable for system modeling of tracking antenna applications and can maximize relative angle sensitivity while minimizing clutter from sidelobes. The equations for relative angle sensitivity for the difference pattern are presented. A multi-objective PSO example is presented, optimizing the tradeoff between peak sidelobe level and relative angle sensitivity.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"514 1","pages":"47-48"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77082718","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 : 2014-09-22DOI: 10.1109/APS.2014.6905017
Bangda Zhou, D. Jiao
Fast algorithm is developed to accelerate a linear-complexity direct finite-element solver for many right hand sides problems. Applications to large-scale inductor arrays and industrial package structures have demonstrated the capability and the performance of the accelerated direct solver.
{"title":"Linear-complexity direct finite element solver accelerated for many right hand sides","authors":"Bangda Zhou, D. Jiao","doi":"10.1109/APS.2014.6905017","DOIUrl":"https://doi.org/10.1109/APS.2014.6905017","url":null,"abstract":"Fast algorithm is developed to accelerate a linear-complexity direct finite-element solver for many right hand sides problems. Applications to large-scale inductor arrays and industrial package structures have demonstrated the capability and the performance of the accelerated direct solver.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"77 1","pages":"1383-1384"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84049332","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 : 2014-09-22DOI: 10.1109/APS.2014.6905020
E. Simsek
In the last decade, we have experienced a fascinating transformation in the research and development of atomically thin-layered material (ATLM) systems. Graphene and its compounds have enabled the development of novel devices for a wide variety of applications in an extremely short period of time. In addition, non-graphene ATLMs have recently been utilized to produce devices with exceptional performances. It is anticipated that ATLMs will play a crucial role in the integration of nano electronics with photonics and plasmonics in the coming decades. However, there are many challenges that need to be addressed before it is possible to convert the potential of ATLMs into reality. Their accurate and efficient modeling is one of these challenges. In this work, I briefly discuss our recent efforts on the development of a hybrid Schrödinger-Poisson and Maxwell's Equations solver that will enable us exploring how light interacts with ATLM systems in different configurations and under different biasing conditions.
{"title":"On the development of a new multi-physics solver for atomically thin layered material systems","authors":"E. Simsek","doi":"10.1109/APS.2014.6905020","DOIUrl":"https://doi.org/10.1109/APS.2014.6905020","url":null,"abstract":"In the last decade, we have experienced a fascinating transformation in the research and development of atomically thin-layered material (ATLM) systems. Graphene and its compounds have enabled the development of novel devices for a wide variety of applications in an extremely short period of time. In addition, non-graphene ATLMs have recently been utilized to produce devices with exceptional performances. It is anticipated that ATLMs will play a crucial role in the integration of nano electronics with photonics and plasmonics in the coming decades. However, there are many challenges that need to be addressed before it is possible to convert the potential of ATLMs into reality. Their accurate and efficient modeling is one of these challenges. In this work, I briefly discuss our recent efforts on the development of a hybrid Schrödinger-Poisson and Maxwell's Equations solver that will enable us exploring how light interacts with ATLM systems in different configurations and under different biasing conditions.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"33 1","pages":"1389-1390"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85096517","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 : 2014-09-22DOI: 10.1109/APS.2014.6904425
R. Waterhouse, D. Novak
A wideband printed slot antenna is presented. The form factor of the radiator is derived by combining aspects of a circular slot antenna with that of a bow-tie slot antenna. By doing so, a wideband impedance and radiation response has been achieved for the new, `Figure 8' printed slot antenna. The antenna displays a less than 3:1 VSWR (Voltage Standing Wave Ratio) bandwidth in excess of several octaves and the radiation pattern also holds its form over multiple octaves.
{"title":"A Figure 8 printed slot antenna","authors":"R. Waterhouse, D. Novak","doi":"10.1109/APS.2014.6904425","DOIUrl":"https://doi.org/10.1109/APS.2014.6904425","url":null,"abstract":"A wideband printed slot antenna is presented. The form factor of the radiator is derived by combining aspects of a circular slot antenna with that of a bow-tie slot antenna. By doing so, a wideband impedance and radiation response has been achieved for the new, `Figure 8' printed slot antenna. The antenna displays a less than 3:1 VSWR (Voltage Standing Wave Ratio) bandwidth in excess of several octaves and the radiation pattern also holds its form over multiple octaves.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"29 1","pages":"187-188"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76778673","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 : 2014-09-22DOI: 10.1109/APS.2014.6905288
A. Kiourti, C. Lee, A. Akhiyat, J. Volakis, H. Schwerdt, J. Chae
A fully-passive, on chip wireless system is proposed for in situ detection of neuropotentials. The system aims to replace conventional wired brain-sensing technologies, thus enhancing patient mobility and preserving safety. It consists of an implanted neurosensor that comprises an implanted antenna and mixer, and an exterior RF interrogator. Link budget issues are discussed, highlighting the challenges of detecting human brain neuropotentials as small as 10s of μVpp.
{"title":"Passive, on chip and in situ detection of neuropotentials","authors":"A. Kiourti, C. Lee, A. Akhiyat, J. Volakis, H. Schwerdt, J. Chae","doi":"10.1109/APS.2014.6905288","DOIUrl":"https://doi.org/10.1109/APS.2014.6905288","url":null,"abstract":"A fully-passive, on chip wireless system is proposed for in situ detection of neuropotentials. The system aims to replace conventional wired brain-sensing technologies, thus enhancing patient mobility and preserving safety. It consists of an implanted neurosensor that comprises an implanted antenna and mixer, and an exterior RF interrogator. Link budget issues are discussed, highlighting the challenges of detecting human brain neuropotentials as small as 10s of μVpp.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"96 1","pages":"1923-1923"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84760715","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：