Pub Date : 2012-10-08DOI: 10.1109/APWC.2012.6324965
B. Cai, Linguo Chai, W. Shangguan, Jian Wang
This paper selects the car following model (CFM) in Cooperative Vehicle Infrastructure System (CVIS) to study. Through the study of the traditional car following model and the problem that in car following model in Paramics the safe distance value is not accurate, we design of a new minimum safe distance car following model based on Paramics car following model and the data exchange in CVIS. And we design the CVIS traffic simulation platform and compare it with the traditional safe distance of the car following model. From the simulation data, we can see that the minimum safety distance car following model based on CVIS is more efficiency.
{"title":"Research on car following model based on cooperative vehicle infrastructure system","authors":"B. Cai, Linguo Chai, W. Shangguan, Jian Wang","doi":"10.1109/APWC.2012.6324965","DOIUrl":"https://doi.org/10.1109/APWC.2012.6324965","url":null,"abstract":"This paper selects the car following model (CFM) in Cooperative Vehicle Infrastructure System (CVIS) to study. Through the study of the traditional car following model and the problem that in car following model in Paramics the safe distance value is not accurate, we design of a new minimum safe distance car following model based on Paramics car following model and the data exchange in CVIS. And we design the CVIS traffic simulation platform and compare it with the traditional safe distance of the car following model. From the simulation data, we can see that the minimum safety distance car following model based on CVIS is more efficiency.","PeriodicalId":6393,"journal":{"name":"2012 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"7 1","pages":"1217-1220"},"PeriodicalIF":0.0,"publicationDate":"2012-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86927562","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 : 2012-10-08DOI: 10.1109/APWC.2012.6324903
M. Takikawa, Y. Inasawa, Y. Konishi
We propose a new compact center-fed reflector antenna with one-dimensional beam scanning function for small satellite application. The proposed antenna has different curves in orthogonal two cross sections. The beam scanning cross section is an imaging reflector form. The non-beam scanning cross section is an axial symmetry Cassegrain form. In this paper, we describe the design method of the proposed antenna based on a doubly curved reflector. The measurement of a prototype antenna demonstrates the validity of the proposed antenna.
{"title":"One-dimensional beam scanning reflector antenna for small satellite applications","authors":"M. Takikawa, Y. Inasawa, Y. Konishi","doi":"10.1109/APWC.2012.6324903","DOIUrl":"https://doi.org/10.1109/APWC.2012.6324903","url":null,"abstract":"We propose a new compact center-fed reflector antenna with one-dimensional beam scanning function for small satellite application. The proposed antenna has different curves in orthogonal two cross sections. The beam scanning cross section is an imaging reflector form. The non-beam scanning cross section is an axial symmetry Cassegrain form. In this paper, we describe the design method of the proposed antenna based on a doubly curved reflector. The measurement of a prototype antenna demonstrates the validity of the proposed antenna.","PeriodicalId":6393,"journal":{"name":"2012 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"100 1","pages":"159-162"},"PeriodicalIF":0.0,"publicationDate":"2012-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76034728","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 : 2012-10-08DOI: 10.1109/APWC.2012.6324976
F. Anderson, K. Naicker, J. Mocke
A set of high range and Doppler resolution radar measurements were performed to gain insights into factors influencing the detectability of submarine masts deployed at periscope depth under realistic operational conditions. This paper describes the measurements, processing results and some insights gained. It is followed by a companion paper [2] describing a subsequent computational electromagnetic (CEM) simulation investigation of a simple mast model in a realistic sea surface environment. It was performed to gain insights into the physics leading to some of the unexpected observed effects reported in this paper.
{"title":"Insights into factors contributing to the observability of a submarine at periscope depth by modern radar. part 1 - high resolution measurements","authors":"F. Anderson, K. Naicker, J. Mocke","doi":"10.1109/APWC.2012.6324976","DOIUrl":"https://doi.org/10.1109/APWC.2012.6324976","url":null,"abstract":"A set of high range and Doppler resolution radar measurements were performed to gain insights into factors influencing the detectability of submarine masts deployed at periscope depth under realistic operational conditions. This paper describes the measurements, processing results and some insights gained. It is followed by a companion paper [2] describing a subsequent computational electromagnetic (CEM) simulation investigation of a simple mast model in a realistic sea surface environment. It was performed to gain insights into the physics leading to some of the unexpected observed effects reported in this paper.","PeriodicalId":6393,"journal":{"name":"2012 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"11 1","pages":"985-988"},"PeriodicalIF":0.0,"publicationDate":"2012-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87355598","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 : 2012-10-08DOI: 10.1109/APWC.2012.6324977
J. C. Smit, J. Cilliers
Recently, a set of high resolution radar measurements were undertaken in South Africa to gain insight into factors influencing the detectability of submarine masts deployed under realistic operational conditions. The measurements, processing results and some insights gained are described in [1]. The current paper presents the results of a subsequent computational electromagnetic (CEM) simulation investigation of a simplified mast model in a realistic sea surface environment. The results illustrate some of the effects of the sea surface reflection interaction on the observed RCS of a submarine mast.
{"title":"Insights into factors contributing to the observability of a submarine at periscope depth by modern radar: Part 2 - EM simulation of mast RCS in a realistic sea surface environment","authors":"J. C. Smit, J. Cilliers","doi":"10.1109/APWC.2012.6324977","DOIUrl":"https://doi.org/10.1109/APWC.2012.6324977","url":null,"abstract":"Recently, a set of high resolution radar measurements were undertaken in South Africa to gain insight into factors influencing the detectability of submarine masts deployed under realistic operational conditions. The measurements, processing results and some insights gained are described in [1]. The current paper presents the results of a subsequent computational electromagnetic (CEM) simulation investigation of a simplified mast model in a realistic sea surface environment. The results illustrate some of the effects of the sea surface reflection interaction on the observed RCS of a submarine mast.","PeriodicalId":6393,"journal":{"name":"2012 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"2 1","pages":"989-992"},"PeriodicalIF":0.0,"publicationDate":"2012-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87990364","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 : 2012-10-08DOI: 10.1109/APWC.2012.6324907
P. Meaney, Amir H. Golnabi, M. Pallone, N. Epstein, P. Kaufman, S. Geimer, K. Paulsen
We have imaged several breast cancer patients at multiple intervals during her neoadjuvant chemotherapy to assess the capability of microwave tomography as a therapy monitoring device. For the patient discussed here, we illustrate the spectral behavior of our tomographic approach in the context of a complex imaging situation with a large scattering tumor along with less frequently encountered structures such as thickened skin in the tumor vicinity. These results demonstrate that the microwave technology is sensitive to dielectric property perturbations associated with treatment-induced physiological changes. In addition, it also confirms previously hypothesized notions that the lower frequency images provide lower resolution but useful counterparts to the enhanced resolution, higher frequency images. This spectral data can be instructive for both UWB radar approaches and multi-frequency or time-domain tomographic approaches. The chemotherapy patients are unique with respect to breast cancer imaging cases in that they usually involve electrically large tumors along with other non-standard features such as extra-thick skin (easily as thick as 1 cm). These large, high contrast features are quite challenging for all types of microwave imaging (radar and tomography-based) and form an important benchmark for testing imaging techniques. For our efforts, we have developed a log transformation as part of the image reconstruction process which we have shown to have superior convergence behavior (i.e. no local minima) while retaining phase wrapping information that is generally lost when only considering more classical minimization criteria. As we will show, this technique requires broadband scattering data which we provide from measurements using our ultrawideband monopole antennas.
{"title":"Spectral imaging for complex clinical breast structures","authors":"P. Meaney, Amir H. Golnabi, M. Pallone, N. Epstein, P. Kaufman, S. Geimer, K. Paulsen","doi":"10.1109/APWC.2012.6324907","DOIUrl":"https://doi.org/10.1109/APWC.2012.6324907","url":null,"abstract":"We have imaged several breast cancer patients at multiple intervals during her neoadjuvant chemotherapy to assess the capability of microwave tomography as a therapy monitoring device. For the patient discussed here, we illustrate the spectral behavior of our tomographic approach in the context of a complex imaging situation with a large scattering tumor along with less frequently encountered structures such as thickened skin in the tumor vicinity. These results demonstrate that the microwave technology is sensitive to dielectric property perturbations associated with treatment-induced physiological changes. In addition, it also confirms previously hypothesized notions that the lower frequency images provide lower resolution but useful counterparts to the enhanced resolution, higher frequency images. This spectral data can be instructive for both UWB radar approaches and multi-frequency or time-domain tomographic approaches. The chemotherapy patients are unique with respect to breast cancer imaging cases in that they usually involve electrically large tumors along with other non-standard features such as extra-thick skin (easily as thick as 1 cm). These large, high contrast features are quite challenging for all types of microwave imaging (radar and tomography-based) and form an important benchmark for testing imaging techniques. For our efforts, we have developed a log transformation as part of the image reconstruction process which we have shown to have superior convergence behavior (i.e. no local minima) while retaining phase wrapping information that is generally lost when only considering more classical minimization criteria. As we will show, this technique requires broadband scattering data which we provide from measurements using our ultrawideband monopole antennas.","PeriodicalId":6393,"journal":{"name":"2012 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"30 1","pages":"202-205"},"PeriodicalIF":0.0,"publicationDate":"2012-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77942129","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 : 2012-10-08DOI: 10.1109/APWC.2012.6324960
W. Steyn
This paper presents a procedure for the design of edge-slot non-resonant planar waveguide arrays for marine applications with relative bandwidths of up to 13 percent.
本文提出了一种相对带宽高达13%的船用边槽非谐振平面波导阵列的设计方法。
{"title":"Planar slotted waveguide arrays for marine applications","authors":"W. Steyn","doi":"10.1109/APWC.2012.6324960","DOIUrl":"https://doi.org/10.1109/APWC.2012.6324960","url":null,"abstract":"This paper presents a procedure for the design of edge-slot non-resonant planar waveguide arrays for marine applications with relative bandwidths of up to 13 percent.","PeriodicalId":6393,"journal":{"name":"2012 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"58 1","pages":"1173-1176"},"PeriodicalIF":0.0,"publicationDate":"2012-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74845641","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 : 2012-10-08DOI: 10.1109/APWC.2012.6324924
Yifei Shi, A. Amert, K. Whites
A novel approach for miniaturization of disc monopole antennas is presented. The physical size of the antenna has been miniaturized by loading a dielectric material of high dielectric constant around the antenna in an intelligent manner. In order to maintain the impedance bandwidth characteristics, a spatial quarter wave transformer was applied. Simulations of the structure showed that the impedance bandwidth was conserved while the physical size of the structure was reduced by 58.4%.
{"title":"Can ultrawideband antennas be miniaturized effectively by dielectric loading?","authors":"Yifei Shi, A. Amert, K. Whites","doi":"10.1109/APWC.2012.6324924","DOIUrl":"https://doi.org/10.1109/APWC.2012.6324924","url":null,"abstract":"A novel approach for miniaturization of disc monopole antennas is presented. The physical size of the antenna has been miniaturized by loading a dielectric material of high dielectric constant around the antenna in an intelligent manner. In order to maintain the impedance bandwidth characteristics, a spatial quarter wave transformer was applied. Simulations of the structure showed that the impedance bandwidth was conserved while the physical size of the structure was reduced by 58.4%.","PeriodicalId":6393,"journal":{"name":"2012 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"55 1","pages":"502-505"},"PeriodicalIF":0.0,"publicationDate":"2012-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74705693","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 : 2012-10-08DOI: 10.1109/APWC.2012.6324988
O. Breinbjerg
This paper reviews research in the Geometrical Theory of Diffraction (GTD) and the Physical Theory of Diffraction (PTD) at the Technical University of Denmark (DTU). The year 2012 celebrates the 50th anniversary of the seminal works of J.B. Keller on GTD and P. Ya Ufimtsev on PTD - two closely connected theories for high-frequency diffraction of electromagnetic waves.
本文综述了丹麦技术大学(DTU)在几何衍射理论(GTD)和物理衍射理论(PTD)方面的研究。2012年是J.B. Keller关于GTD和P. Ya Ufimtsev关于PTD的开创性作品50周年，这两个密切相关的电磁波高频衍射理论。
{"title":"GTD and PTD at DTU","authors":"O. Breinbjerg","doi":"10.1109/APWC.2012.6324988","DOIUrl":"https://doi.org/10.1109/APWC.2012.6324988","url":null,"abstract":"This paper reviews research in the Geometrical Theory of Diffraction (GTD) and the Physical Theory of Diffraction (PTD) at the Technical University of Denmark (DTU). The year 2012 celebrates the 50th anniversary of the seminal works of J.B. Keller on GTD and P. Ya Ufimtsev on PTD - two closely connected theories for high-frequency diffraction of electromagnetic waves.","PeriodicalId":6393,"journal":{"name":"2012 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"46 1","pages":"1071-1074"},"PeriodicalIF":0.0,"publicationDate":"2012-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76372925","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 : 2012-10-08DOI: 10.1109/APWC.2012.6324920
M. Hein, M. Helbig, M. Kmec, J. Sachs, F. Scotto di Clemente, R. Stephan, M. Hamouda, T. Ussmueller, R. Weigel, M. Robens, R. Wunderlich, S. Heinen
Ultra-wideband active array imaging has proven extremely valuable for biomedical diagnostics. At the same time, the underlying technologies have achieved a high degree of maturity. Across institutions, we have merged our expertise in M-sequence radar systems, antennas, low-noise and high-power circuitry, to devise an UWB MIMO radar system for breast tumour localisation. Recent progress in UWB imaging and hardware for active antenna arrays is presented.
{"title":"Ultra-wideband active array imaging for biomedical diagnostics","authors":"M. Hein, M. Helbig, M. Kmec, J. Sachs, F. Scotto di Clemente, R. Stephan, M. Hamouda, T. Ussmueller, R. Weigel, M. Robens, R. Wunderlich, S. Heinen","doi":"10.1109/APWC.2012.6324920","DOIUrl":"https://doi.org/10.1109/APWC.2012.6324920","url":null,"abstract":"Ultra-wideband active array imaging has proven extremely valuable for biomedical diagnostics. At the same time, the underlying technologies have achieved a high degree of maturity. Across institutions, we have merged our expertise in M-sequence radar systems, antennas, low-noise and high-power circuitry, to devise an UWB MIMO radar system for breast tumour localisation. Recent progress in UWB imaging and hardware for active antenna arrays is presented.","PeriodicalId":6393,"journal":{"name":"2012 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"48 1","pages":"367-370"},"PeriodicalIF":0.0,"publicationDate":"2012-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83312038","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 : 2012-10-08DOI: 10.1109/APWC.2012.6324979
C. Vale
We present what we believe to be two novel and related antenna topologies that find application in radio direction finding (DF). A topology for a stabilised anti-phase dual-fed loop antenna is presented that reduces sensitivity to cross-polarised wave incidence, increases loop gain at higher frequencies and provides improved pattern stability when compared to traditional loop antenna designs. Additionally, we present a hybrid Adcock/loop topology that provides the desirable qualities of Adcock arrays at high frequencies whilst substantially improving the low frequency sensitivity of electrically small Adcock arrays. Design and measurements are presented for both variations.
{"title":"Variations on loop and Adcock array topologies for improved radio direction finding performance","authors":"C. Vale","doi":"10.1109/APWC.2012.6324979","DOIUrl":"https://doi.org/10.1109/APWC.2012.6324979","url":null,"abstract":"We present what we believe to be two novel and related antenna topologies that find application in radio direction finding (DF). A topology for a stabilised anti-phase dual-fed loop antenna is presented that reduces sensitivity to cross-polarised wave incidence, increases loop gain at higher frequencies and provides improved pattern stability when compared to traditional loop antenna designs. Additionally, we present a hybrid Adcock/loop topology that provides the desirable qualities of Adcock arrays at high frequencies whilst substantially improving the low frequency sensitivity of electrically small Adcock arrays. Design and measurements are presented for both variations.","PeriodicalId":6393,"journal":{"name":"2012 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"3 1","pages":"997-1000"},"PeriodicalIF":0.0,"publicationDate":"2012-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91039882","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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