Pub Date : 2016-03-13DOI: 10.1109/ROPACES.2016.7465447
A. Mohamed, A. Berzoy, O. Mohammed
Accurate and efficient models can assist designers to predict and optimize the system performance during system development. This paper presents a physics-based 2-D finite-element model (FEM) for bidirectional inductive wireless power transfer system (BIWPTS) for electric vehicle (EV) applications. The proposed model is based on a co-simulation platform developed through the coupling between Finite Element (FE) and circuit modeling. A steady-state analytical model for the same system was developed and implemented in MatLab environment. A 0.5 kW BIWPTS was analyzed based on the two models and the results were compared. Less than 0.5% normalized mean square (NMSE) current error shows that the numerical models were able to predict the system performance accurately. These models can be easily extended to other magnetic designs, compensation and inverter topologies.
{"title":"Physics-based FE model and analytical verification of bi-directional inductive wireless power transfer system","authors":"A. Mohamed, A. Berzoy, O. Mohammed","doi":"10.1109/ROPACES.2016.7465447","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465447","url":null,"abstract":"Accurate and efficient models can assist designers to predict and optimize the system performance during system development. This paper presents a physics-based 2-D finite-element model (FEM) for bidirectional inductive wireless power transfer system (BIWPTS) for electric vehicle (EV) applications. The proposed model is based on a co-simulation platform developed through the coupling between Finite Element (FE) and circuit modeling. A steady-state analytical model for the same system was developed and implemented in MatLab environment. A 0.5 kW BIWPTS was analyzed based on the two models and the results were compared. Less than 0.5% normalized mean square (NMSE) current error shows that the numerical models were able to predict the system performance accurately. These models can be easily extended to other magnetic designs, compensation and inverter topologies.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125463370","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465433
Pan Feng, Xing Chen
As a high gain antenna with strong resonant property, the resonant cavity antenna (RCA) is confronted with a narrow bandwidth. To tackle this problem, this paper proposes a novel method of designing a non-uniform metamaterial-inspired superstrate for the RCA. To enhance its bandwidth, unit cells on the proposed superstrate varies their dimension with respective to their distance to the superstrate's center according to an exponent function. A RCA working at 10 GHz and covered with such a non-uniform metamaterial superstrate is designed, fabricated and measured. Results show the proposed nonuniform metamaterial superstrate improves the RCA's |S11|<;-10 dB impedance bandwidth from 0.36% to 3.11%, and meanwhile keeps almost the same gain, side-lobe level and cross polarization level for the RCA.
{"title":"A non-uniform design of the metamaterial superstrate for the resonant cavity antenna with wideband property","authors":"Pan Feng, Xing Chen","doi":"10.1109/ROPACES.2016.7465433","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465433","url":null,"abstract":"As a high gain antenna with strong resonant property, the resonant cavity antenna (RCA) is confronted with a narrow bandwidth. To tackle this problem, this paper proposes a novel method of designing a non-uniform metamaterial-inspired superstrate for the RCA. To enhance its bandwidth, unit cells on the proposed superstrate varies their dimension with respective to their distance to the superstrate's center according to an exponent function. A RCA working at 10 GHz and covered with such a non-uniform metamaterial superstrate is designed, fabricated and measured. Results show the proposed nonuniform metamaterial superstrate improves the RCA's |S11|<;-10 dB impedance bandwidth from 0.36% to 3.11%, and meanwhile keeps almost the same gain, side-lobe level and cross polarization level for the RCA.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126637232","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465332
T. Wu
Low-cost, low-volume, and low-mass THz/Infrared frequency selective surfaces (FSS) with the Minkowski fractal elements are described and compared with the other elements. It exhibits excellent 1st resonant frequency stability with incident angles varying from normal to 60° and for both TE and TM polarizations. The performance of this fractal FSS is far better than the previous FSSs with simple-shaped elements, i.e. cross dipole, or rectangular/circular loop elements.
{"title":"Improved THz/Infrared frequency selective surface with Minkowski fractal elements","authors":"T. Wu","doi":"10.1109/ROPACES.2016.7465332","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465332","url":null,"abstract":"Low-cost, low-volume, and low-mass THz/Infrared frequency selective surfaces (FSS) with the Minkowski fractal elements are described and compared with the other elements. It exhibits excellent 1st resonant frequency stability with incident angles varying from normal to 60° and for both TE and TM polarizations. The performance of this fractal FSS is far better than the previous FSSs with simple-shaped elements, i.e. cross dipole, or rectangular/circular loop elements.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126975121","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465455
Cem Benar, Ibrahim Abbas Tafida, Mehmet Polat Kunduz, Taha Imeci, A. Saral
In this work, a microstrip hairpin band-pass filter is designed and simulated in Sonnet Suite, a 3-D Planar Electromagnetic simulation tool [1]. A microstrip hairpin band-pass filter in any desired pass band can be obtained by modifying the length of CL parameter.
{"title":"Changing passband on microstrip hairpin band-pass filter","authors":"Cem Benar, Ibrahim Abbas Tafida, Mehmet Polat Kunduz, Taha Imeci, A. Saral","doi":"10.1109/ROPACES.2016.7465455","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465455","url":null,"abstract":"In this work, a microstrip hairpin band-pass filter is designed and simulated in Sonnet Suite, a 3-D Planar Electromagnetic simulation tool [1]. A microstrip hairpin band-pass filter in any desired pass band can be obtained by modifying the length of CL parameter.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121499727","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465356
Yue Li, Zhijun Zhang, Zhenghe Feng
This paper presents a brief review of the antennas wrapped up on slender column for wireless communication applications. The antennas wrapped up on slender column are with the significant merits of small azimuthal cross section and omni-directional radiation pattern, and can be adopted in the designs of MIMO antenna, multiple-band antenna and series-fed antenna array by our research group in recent years. This design idea offers exciting possibilities for the antennas mounted on portable access points and mobile handsets.
{"title":"Antennas wrapped up on slender column","authors":"Yue Li, Zhijun Zhang, Zhenghe Feng","doi":"10.1109/ROPACES.2016.7465356","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465356","url":null,"abstract":"This paper presents a brief review of the antennas wrapped up on slender column for wireless communication applications. The antennas wrapped up on slender column are with the significant merits of small azimuthal cross section and omni-directional radiation pattern, and can be adopted in the designs of MIMO antenna, multiple-band antenna and series-fed antenna array by our research group in recent years. This design idea offers exciting possibilities for the antennas mounted on portable access points and mobile handsets.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125053917","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465452
Enkuang D. Wang, B. Beck, T. Brothers
This paper presents a hardware implementation of a transceiver that employs both OFDM and SOQPSK-TG burst-mode signals, and it also presents an adaptive modulation and coding algorithm that uses both waveforms for the AWGN channel. The implementation complies very closely with the iNET physical layer, in which both modulations, along with an LDPC code, are used in a multi-scheme adaptation algorithm. The adaptive scheme is intended to explore the use of an adaptive algorithm for telemetry systems. The hardware implementations are described and experimental results are presented.
{"title":"Hardware implementation of adaptive modulation for OFDM and SOQPSK with preliminary results","authors":"Enkuang D. Wang, B. Beck, T. Brothers","doi":"10.1109/ROPACES.2016.7465452","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465452","url":null,"abstract":"This paper presents a hardware implementation of a transceiver that employs both OFDM and SOQPSK-TG burst-mode signals, and it also presents an adaptive modulation and coding algorithm that uses both waveforms for the AWGN channel. The implementation complies very closely with the iNET physical layer, in which both modulations, along with an LDPC code, are used in a multi-scheme adaptation algorithm. The adaptive scheme is intended to explore the use of an adaptive algorithm for telemetry systems. The hardware implementations are described and experimental results are presented.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126462071","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465331
Peng Zhao, Gaofeng Wang
A new multilevel Green's function interpolation method (MLGFIM) used for the analysis of microstrip antenna arrays is presented. Dyadic Green's function for a layered medium is used in this method as the kernel to efficiently reduce the number of unknowns. Interpolation of this type of Green's function is then implemented by radial basis functions (RBFs). The interpolation accuracies using Lagrange and RBF interpolations are compared. A numerical example of a 30 by 30 microstrip patch array is given to validate the accuracy and efficiency of the proposed method.
{"title":"A multilevel green's function interpolation method for the analysis of microstrip antenna arrays","authors":"Peng Zhao, Gaofeng Wang","doi":"10.1109/ROPACES.2016.7465331","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465331","url":null,"abstract":"A new multilevel Green's function interpolation method (MLGFIM) used for the analysis of microstrip antenna arrays is presented. Dyadic Green's function for a layered medium is used in this method as the kernel to efficiently reduce the number of unknowns. Interpolation of this type of Green's function is then implemented by radial basis functions (RBFs). The interpolation accuracies using Lagrange and RBF interpolations are compared. A numerical example of a 30 by 30 microstrip patch array is given to validate the accuracy and efficiency of the proposed method.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130568354","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465468
Kedi Zhang, Jianming Jin, P. Geubelle
An interface-enriched generalized finite-element method (IGFEM) is presented for accurate and efficient electromagnetic analysis of complex composite materials. Without using meshes that conform to the material interfaces, the IGFEM enriches the solution space at the material interfaces to capture the discontinuities of the field and its derivatives. Two verification examples and one engineering problem are provided to respectively demonstrate the accuracy of the IGFEM and its potential in modeling composites with intricate and randomly distributed internal structures.
{"title":"An interface-enriched generalized FEM for EM analysis of composites with nonconformal meshes","authors":"Kedi Zhang, Jianming Jin, P. Geubelle","doi":"10.1109/ROPACES.2016.7465468","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465468","url":null,"abstract":"An interface-enriched generalized finite-element method (IGFEM) is presented for accurate and efficient electromagnetic analysis of complex composite materials. Without using meshes that conform to the material interfaces, the IGFEM enriches the solution space at the material interfaces to capture the discontinuities of the field and its derivatives. Two verification examples and one engineering problem are provided to respectively demonstrate the accuracy of the IGFEM and its potential in modeling composites with intricate and randomly distributed internal structures.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122248165","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465425
Seth Mccormick, W. Coburn
A new way to use an electromagnetic band gap structure for a particular antenna application is presented. A prototype microstrip grid array is shown to be capable of being fed against the surface of an electromagnetic band grap structure such that the array and feed are kept separate from the ground plane that is typically required for feeding. The array can then be placed on any surface suitable enough to act as a ground plane. Simulations of the baseline and prototype are presented.
{"title":"Microstrip grid array fed against an EBG","authors":"Seth Mccormick, W. Coburn","doi":"10.1109/ROPACES.2016.7465425","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465425","url":null,"abstract":"A new way to use an electromagnetic band gap structure for a particular antenna application is presented. A prototype microstrip grid array is shown to be capable of being fed against the surface of an electromagnetic band grap structure such that the array and feed are kept separate from the ground plane that is typically required for feeding. The array can then be placed on any surface suitable enough to act as a ground plane. Simulations of the baseline and prototype are presented.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134064801","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 : 2016-03-13DOI: 10.1109/ROPACES.2016.7465391
Dragan Gecan, M. Olavsbråten, K. Gjertsen
Possibility of linearity improvement using a dynamic gate biasing technique for flattening a gain or a phase of a 10 W GaN HEMT PA has been investigated. It is shown that a polynomial gate tracking function of acceptable order can be used for that purpose. Linearity improvement while maintaining efficiency by flattening the phase transfer of the PA with dynamic gate bias technique has been shown in a simulation. Results are showing 5 dB better ACPR compared to a reference static bias PA. Flattening the gain of the PA does not result in any linearity improvement due to a large phase transfer change of the PA caused by dynamic gate bias.
利用动态门偏置技术对10w GaN HEMT PA的增益或相位进行平坦化，提高线性度的可能性已经被研究。结果表明，可接受阶数的多项式门跟踪函数可用于此目的。仿真结果表明，采用动态栅极偏置技术，可以在保持效率的同时提高线性度。结果显示，与参考静态偏置PA相比，ACPR提高了5 dB。由于动态栅极偏置引起的PA的大相转移变化，使PA的增益变平不会导致任何线性改善。
{"title":"Investiogation of linearity improvement with dynamic gate bias technique for flat gain or phase of an 10 W GaN HEMT power amplifier","authors":"Dragan Gecan, M. Olavsbråten, K. Gjertsen","doi":"10.1109/ROPACES.2016.7465391","DOIUrl":"https://doi.org/10.1109/ROPACES.2016.7465391","url":null,"abstract":"Possibility of linearity improvement using a dynamic gate biasing technique for flattening a gain or a phase of a 10 W GaN HEMT PA has been investigated. It is shown that a polynomial gate tracking function of acceptable order can be used for that purpose. Linearity improvement while maintaining efficiency by flattening the phase transfer of the PA with dynamic gate bias technique has been shown in a simulation. Results are showing 5 dB better ACPR compared to a reference static bias PA. Flattening the gain of the PA does not result in any linearity improvement due to a large phase transfer change of the PA caused by dynamic gate bias.","PeriodicalId":101990,"journal":{"name":"2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133547693","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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