Pub Date : 2009-06-01DOI: 10.1109/APS.2009.5172143
C. Tokgoz, C. Reddy, R. Burkholder, P. Pathak
In this paper, development of a new generation UTD code has been discussed. What makes the proposed UTD code unique is the application of UTD directly to faceted airborne platforms without going through the complicated task of approximating the electrically large platform in terms of canonical shapes. Numerical results show that the proposed UTD code produces promising results in the prediction of radiation pattern of antennas on faceted airborne platforms. This code will be very useful for the placement of antennas on electrically large platforms, and their EM interference/EM compatibility (EMI/EMC) analysis.
{"title":"Application of UTD for prediction of radiation pattern and mutual coupling associated with antennas on faceted airborne platforms","authors":"C. Tokgoz, C. Reddy, R. Burkholder, P. Pathak","doi":"10.1109/APS.2009.5172143","DOIUrl":"https://doi.org/10.1109/APS.2009.5172143","url":null,"abstract":"In this paper, development of a new generation UTD code has been discussed. What makes the proposed UTD code unique is the application of UTD directly to faceted airborne platforms without going through the complicated task of approximating the electrically large platform in terms of canonical shapes. Numerical results show that the proposed UTD code produces promising results in the prediction of radiation pattern of antennas on faceted airborne platforms. This code will be very useful for the placement of antennas on electrically large platforms, and their EM interference/EM compatibility (EMI/EMC) analysis.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121893151","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 : 2009-06-01DOI: 10.1109/APS.2009.5171506
Buli Xu, Yinchao Chen, Tom McDonough, Hao Li
Vias can introduce impedance discontinuity, slow down signal edge rate, add jitter and reduce eye openings, and cause data misinterpretation by the receiver in high-speed channel. This paper presents the design and optimization of differential vias for high-speed serial ATA connection at the data rate of 6 Gb/s. First, differential vias on a specific stackup were modeled in the 3D full-wave solver HFSS. Second, via mechanical design parameters, including via stub length, antipad radius, capture pad radius, barrel radius, and spacing, were swept to study their impacts on impedance discontinuity using TDR impedance determined by simulation. Third, importance of differential via optimization was highlighted by case studies of two PCB transmission line connections with nominal and optimized differential vias respectively.
{"title":"Impact of differential vias on high-speed connection design","authors":"Buli Xu, Yinchao Chen, Tom McDonough, Hao Li","doi":"10.1109/APS.2009.5171506","DOIUrl":"https://doi.org/10.1109/APS.2009.5171506","url":null,"abstract":"Vias can introduce impedance discontinuity, slow down signal edge rate, add jitter and reduce eye openings, and cause data misinterpretation by the receiver in high-speed channel. This paper presents the design and optimization of differential vias for high-speed serial ATA connection at the data rate of 6 Gb/s. First, differential vias on a specific stackup were modeled in the 3D full-wave solver HFSS. Second, via mechanical design parameters, including via stub length, antipad radius, capture pad radius, barrel radius, and spacing, were swept to study their impacts on impedance discontinuity using TDR impedance determined by simulation. Third, importance of differential via optimization was highlighted by case studies of two PCB transmission line connections with nominal and optimized differential vias respectively.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121918520","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 : 2009-06-01DOI: 10.1109/APS.2009.5172086
A. Corucci, R. Guanciale, S. Genovesi, D. Cucuzzella, S. Bertini, F. B. Terzet, A. Monorchio
Communication engineers are nowadays facing an increasing amount of problems which require versatile and valuable tools able to provide a reliable prediction of signal propagation in complex environments. Moreover, the increase of data rate and the growing demand of mobility have determined an increment in the number of the base stations. As a matter of fact, an optimal network planning requires to both cover the widest area and provide high data-rate services; to this end, mobile phone companies and wireless internet service providers demand efficient predictions about signal strength and channel characterization. The involved scenarios can also be indoor and/or mixed indoor and outdoor, with applications spanning from the case of a wireless indoor network, to the analysis in a hazardous working area to check the respect of the legal requirements dictated by the electromagnetic compatibility standards, or else a mobile-phone planning for base station placement, to quote a few.
{"title":"A remotely distributed ray tracing for the analysis of electromagnetic propagation in complex indoor and outdoor environments","authors":"A. Corucci, R. Guanciale, S. Genovesi, D. Cucuzzella, S. Bertini, F. B. Terzet, A. Monorchio","doi":"10.1109/APS.2009.5172086","DOIUrl":"https://doi.org/10.1109/APS.2009.5172086","url":null,"abstract":"Communication engineers are nowadays facing an increasing amount of problems which require versatile and valuable tools able to provide a reliable prediction of signal propagation in complex environments. Moreover, the increase of data rate and the growing demand of mobility have determined an increment in the number of the base stations. As a matter of fact, an optimal network planning requires to both cover the widest area and provide high data-rate services; to this end, mobile phone companies and wireless internet service providers demand efficient predictions about signal strength and channel characterization. The involved scenarios can also be indoor and/or mixed indoor and outdoor, with applications spanning from the case of a wireless indoor network, to the analysis in a hazardous working area to check the respect of the legal requirements dictated by the electromagnetic compatibility standards, or else a mobile-phone planning for base station placement, to quote a few.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117294843","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 : 2009-06-01DOI: 10.1109/APS.2009.5172132
H. Deng, B. Himed
For airborne radar systems, space-time adaptive processing (STAP) is the approach that is normally adopted to detect ground moving targets in ground clutter, but the technique becomes less effective if the speed of ground moving targets is very low because of the proximity of the Doppler frequency of targets to that of ground clutter. Typical low-speed ground target detection scenarios include detecting ground troops and slowly-moving ground vehicles. Multiple-Input Multiple-Output (MIMO) radar possesses multiple transmitting and receiving channels providing additional diversified reflections for fusion processing in target detection and measurements. MIMO radar has been extensively investigated [1, 2]; but the exact structure of MIMO radar is defined widely different. In this work, an innovative multi-level MIMO radar signal processing architecture is proposed for airborne systems to effectively detect low-speed ground moving targets. The new MIMO-based approach is demonstrated to be effective for detecting such low-speed ground targets in this work, and some simulation results are presented subsequently.
{"title":"Detection of low-speed ground moving targets using MIMO radar","authors":"H. Deng, B. Himed","doi":"10.1109/APS.2009.5172132","DOIUrl":"https://doi.org/10.1109/APS.2009.5172132","url":null,"abstract":"For airborne radar systems, space-time adaptive processing (STAP) is the approach that is normally adopted to detect ground moving targets in ground clutter, but the technique becomes less effective if the speed of ground moving targets is very low because of the proximity of the Doppler frequency of targets to that of ground clutter. Typical low-speed ground target detection scenarios include detecting ground troops and slowly-moving ground vehicles. Multiple-Input Multiple-Output (MIMO) radar possesses multiple transmitting and receiving channels providing additional diversified reflections for fusion processing in target detection and measurements. MIMO radar has been extensively investigated [1, 2]; but the exact structure of MIMO radar is defined widely different. In this work, an innovative multi-level MIMO radar signal processing architecture is proposed for airborne systems to effectively detect low-speed ground moving targets. The new MIMO-based approach is demonstrated to be effective for detecting such low-speed ground targets in this work, and some simulation results are presented subsequently.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129419381","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 : 2009-06-01DOI: 10.1109/APS.2009.5172204
Q. Liu
We have summarized our work on well-posed PML for electromagnetic waves, scalar acoustic waves, and elastic waves. We have also applied the PML to more complex systems including poroelastic waves (Biot waves) and acoustoelasticity, as well as quantum transport. Numerical results of these PMLs in various wave phenomena will be demonstrated with finite-difference time-domain, pseudospectral time-domain (PSTD), spectral element time-domain (SETD) and frequency-domain methods.
{"title":"Application of PML to electromagnetics, acoustics, elasticity, and quantum mechanics","authors":"Q. Liu","doi":"10.1109/APS.2009.5172204","DOIUrl":"https://doi.org/10.1109/APS.2009.5172204","url":null,"abstract":"We have summarized our work on well-posed PML for electromagnetic waves, scalar acoustic waves, and elastic waves. We have also applied the PML to more complex systems including poroelastic waves (Biot waves) and acoustoelasticity, as well as quantum transport. Numerical results of these PMLs in various wave phenomena will be demonstrated with finite-difference time-domain, pseudospectral time-domain (PSTD), spectral element time-domain (SETD) and frequency-domain methods.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129497761","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 : 2009-06-01DOI: 10.1109/APS.2009.5171887
Gyu Seon Han, Y. J. Lee, Yongsup Kim, A. Kim
This paper presents the technique to improve radiation performance of folder type mobile phone by using the hinge contact structure with the capacitive gap. Variation of the efficiency due to the change of capacitive gap distance is analyzed and the optimized distance is derived. The efficiency obtained from simulation results is compared with that from measurement to verify the proposed method.
{"title":"A novel technique for the improvement of radiation performance of folder type mobile phone by using a hinge contact structure with capacitive gap","authors":"Gyu Seon Han, Y. J. Lee, Yongsup Kim, A. Kim","doi":"10.1109/APS.2009.5171887","DOIUrl":"https://doi.org/10.1109/APS.2009.5171887","url":null,"abstract":"This paper presents the technique to improve radiation performance of folder type mobile phone by using the hinge contact structure with the capacitive gap. Variation of the efficiency due to the change of capacitive gap distance is analyzed and the optimized distance is derived. The efficiency obtained from simulation results is compared with that from measurement to verify the proposed method.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129523426","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 : 2009-06-01DOI: 10.1109/APS.2009.5172125
A. Elsherbini, K. Sarabandi
In this paper, we presented a compact directive UWB transmit receive antenna pair. The basic operation of the antenna was discussed and the effect of the dimensions on the bandwidth, pattern and isolation performance was investigated. The antenna was fabricated and measured. The measurement and simulation results showed good agreement. The measured isolation was better than 21 dB and the measured VSWR was better than 2.3 over the band 0.9 – 3 GHz.
{"title":"Compact high-isolation directive UWB transmit/receive antenna pair for radar applications","authors":"A. Elsherbini, K. Sarabandi","doi":"10.1109/APS.2009.5172125","DOIUrl":"https://doi.org/10.1109/APS.2009.5172125","url":null,"abstract":"In this paper, we presented a compact directive UWB transmit receive antenna pair. The basic operation of the antenna was discussed and the effect of the dimensions on the bandwidth, pattern and isolation performance was investigated. The antenna was fabricated and measured. The measurement and simulation results showed good agreement. The measured isolation was better than 21 dB and the measured VSWR was better than 2.3 over the band 0.9 – 3 GHz.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129710355","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 : 2009-06-01DOI: 10.1109/APS.2009.5172210
J. Roden, J. P. Skinner, S. Johns
The analysis of periodic structures is of great interest for engineers and scientists in a variety of applications. EMC design, antenna design, photonics, and LO design are examples of such areas. In previous work [1], [2], [3], [4], [5], [6] it has been shown by these authors and others that such analyses may be accurately accomplished in the frequency or time domain. While previous works have been successful for a variety of problem scenarios, time domain implementations suffer a loss of accuracy at very low frequencies due to a breakdown of PML performance. To understand this deficiency, consider the expressions below which embody the split-field periodic FDTD where convolutional PML (CMPL) has been employed.
{"title":"Effectiveness of a second order CPML absorbing boundary condition within the periodic FDTD method","authors":"J. Roden, J. P. Skinner, S. Johns","doi":"10.1109/APS.2009.5172210","DOIUrl":"https://doi.org/10.1109/APS.2009.5172210","url":null,"abstract":"The analysis of periodic structures is of great interest for engineers and scientists in a variety of applications. EMC design, antenna design, photonics, and LO design are examples of such areas. In previous work [1], [2], [3], [4], [5], [6] it has been shown by these authors and others that such analyses may be accurately accomplished in the frequency or time domain. While previous works have been successful for a variety of problem scenarios, time domain implementations suffer a loss of accuracy at very low frequencies due to a breakdown of PML performance. To understand this deficiency, consider the expressions below which embody the split-field periodic FDTD where convolutional PML (CMPL) has been employed.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129722908","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 : 2009-06-01DOI: 10.1109/APS.2009.5171924
Zicong Mei, Yu Zhang, T. Sarkar
In this paper, a marching-on in degree solution to the problem of time domain electric field integer equation is presented where the higher order basis functions are employed for the spatial expansion. The marching-on in degree method can obtain a solution that is late-time stable, which is marching-on in time method cannot. Numerical result is presented to show the accuracy of the MOD method with higher order basis functions.
{"title":"Solving time domain EFIE using higher order basis functions and marching-on in degree method","authors":"Zicong Mei, Yu Zhang, T. Sarkar","doi":"10.1109/APS.2009.5171924","DOIUrl":"https://doi.org/10.1109/APS.2009.5171924","url":null,"abstract":"In this paper, a marching-on in degree solution to the problem of time domain electric field integer equation is presented where the higher order basis functions are employed for the spatial expansion. The marching-on in degree method can obtain a solution that is late-time stable, which is marching-on in time method cannot. Numerical result is presented to show the accuracy of the MOD method with higher order basis functions.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128407625","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 : 2009-06-01DOI: 10.1109/APS.2009.5172226
Y. Kuwahara, M. Hamai, T. Maruyama
We have examined the characteristics of multi-beam antenna with vertical fan beam consisting of the dielectric lens and Fermi antennas with corrugation. We have confirmed the good performances of Fermi antennas with corrugation for the feed at 24GHz band through trial manufacturing and evaluation tests. Then the lens shape and feed positions have been designed by pareto GA, and various radiation patterns of the lens antenna have been examined by numerical simulation. It became clear that the proposed antenna configuration provided superior performances as the multibeam antenna. In the future, we are to manufacture the lens and to evaluate.
{"title":"Multi-beam antenna with vertical fan beam of the dielectric lens and fermi antennas with corrugation","authors":"Y. Kuwahara, M. Hamai, T. Maruyama","doi":"10.1109/APS.2009.5172226","DOIUrl":"https://doi.org/10.1109/APS.2009.5172226","url":null,"abstract":"We have examined the characteristics of multi-beam antenna with vertical fan beam consisting of the dielectric lens and Fermi antennas with corrugation. We have confirmed the good performances of Fermi antennas with corrugation for the feed at 24GHz band through trial manufacturing and evaluation tests. Then the lens shape and feed positions have been designed by pareto GA, and various radiation patterns of the lens antenna have been examined by numerical simulation. It became clear that the proposed antenna configuration provided superior performances as the multibeam antenna. In the future, we are to manufacture the lens and to evaluate.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129323284","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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