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2011 XXXth URSI General Assembly and Scientific Symposium最新文献

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Possibilities and some results of the ionosphere regional monitoring by GPS-radio interferometry gps -无线电干涉测量电离层区域监测的可能性和一些结果
2011 XXXth URSI General Assembly and Scientific Symposium Pub Date : 2011-10-20 DOI: 10.1109/URSIGASS.2011.6050959
V. I. Zakharov, V. Kunitsyn, M. Titova
{"title":"Possibilities and some results of the ionosphere regional monitoring by GPS-radio interferometry","authors":"V. I. Zakharov, V. Kunitsyn, M. Titova","doi":"10.1109/URSIGASS.2011.6050959","DOIUrl":"https://doi.org/10.1109/URSIGASS.2011.6050959","url":null,"abstract":"In this work there were considered some ionospheric displays of atmosphere and lithosphere interactions detected during February-March of 2010 above South America. With the use of GPS-interferometry methods there were revealed spectrum changes of non-uniform structures connected with time and period of seismic activity in monitoring region. Probable interpretation of observed phenomena was suggested and analysis of geographical binding dedicated by claster analysis of waves structures was conducted.","PeriodicalId":325870,"journal":{"name":"2011 XXXth URSI General Assembly and Scientific Symposium","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126102247","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}
引用次数: 1
Wideband low frequency antennas for radio astronomy arrays 用于射电天文阵列的宽带低频天线
2011 XXXth URSI General Assembly and Scientific Symposium Pub Date : 2011-10-20 DOI: 10.1109/URSIGASS.2011.6051190
A. Rogers, E. Kratzenberg, B. Corey, C. Lonsdale, Christopher L. Williams, J. Bowman
{"title":"Wideband low frequency antennas for radio astronomy arrays","authors":"A. Rogers, E. Kratzenberg, B. Corey, C. Lonsdale, Christopher L. Williams, J. Bowman","doi":"10.1109/URSIGASS.2011.6051190","DOIUrl":"https://doi.org/10.1109/URSIGASS.2011.6051190","url":null,"abstract":"Antennas in the frequency range 10 to 300 MHz are being designed with all-sky coverage, a low response at the horizon to minimize interference from terrestrial sources, negligible ground loss and a good low noise match to the low noise amplifier (LNA). Other features include low cost, dual polarization and good performance over more than an octave bandwidth. Extending the antenna performance over a wider frequency range and accurate calibration are remaining challenges. Modeling of the antenna and its associated low noise amplifier shows promise as a method of improving calibration accuracy.","PeriodicalId":325870,"journal":{"name":"2011 XXXth URSI General Assembly and Scientific Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123314065","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}
引用次数: 1
Hybrid methods based on generalized scattering matrices 基于广义散射矩阵的混合方法
2011 XXXth URSI General Assembly and Scientific Symposium Pub Date : 2011-10-20 DOI: 10.1109/URSIGASS.2011.6050247
E. Martini, C. D. Giovampaola, A. Toccafondi, S. Maci
{"title":"Hybrid methods based on generalized scattering matrices","authors":"E. Martini, C. D. Giovampaola, A. Toccafondi, S. Maci","doi":"10.1109/URSIGASS.2011.6050247","DOIUrl":"https://doi.org/10.1109/URSIGASS.2011.6050247","url":null,"abstract":"A general hybrid technique based on the use of generalized scattering matrices is presented for the electromagnetic analysis of complex antenna and/or scattering problems. The analysis domain is decomposed into separate subdomains, which are independently studied through the most appropriate technique and characterized by a generalized scattering matrix (GSM), where the ports are associated with a proper set of wave objects. Finally, the interactions among the subdomains are described by imposing the proper subdomain connections. Two particular implementations of the general technique are illustrated. In the first one, the wave objects are complex point source (CPS) beams. Thanks to the angular selectivity of the CPS beams, only a small fraction of the beams are involved in the final system, thus, leading to an efficient numerical procedure. In the second one, spherical waves are used as wave objects. This choice offers the advantage of direct interfaceability with the output of spherical near-field measurements or numerical simulations.","PeriodicalId":325870,"journal":{"name":"2011 XXXth URSI General Assembly and Scientific Symposium","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125365910","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}
引用次数: 1
Delopement of mutimode horns and wideband feed for radio telescopes 射电望远镜多模喇叭和宽带馈电的研制
2011 XXXth URSI General Assembly and Scientific Symposium Pub Date : 2011-10-20 DOI: 10.1109/URSIGASS.2011.6051293
H. Ujihara, K. Kimura, Kouhei Matsumoto, H. Ogawa, Takeshi Ohno, M. Tsuboi, T. Kasuga, Mareki Homma, N. Kawaguchi
{"title":"Delopement of mutimode horns and wideband feed for radio telescopes","authors":"H. Ujihara, K. Kimura, Kouhei Matsumoto, H. Ogawa, Takeshi Ohno, M. Tsuboi, T. Kasuga, Mareki Homma, N. Kawaguchi","doi":"10.1109/URSIGASS.2011.6051293","DOIUrl":"https://doi.org/10.1109/URSIGASS.2011.6051293","url":null,"abstract":"Multimode horns were developed for 8.4GHz, 22GHz, 43GHz receiver systems of ASTRO-G/VSOP-2 satellite for Space-VLBI, and for 6.7GHz of VERA 20m radio telescopes of National Astronomical Observatory in JAPAN and 25m Shanghai Radio telescope in China. Rational bandwidth of these horns in low cross polar level are 20-30%, and their thin walls without corrugation and shortened length are the best for the satellite use. Also, wideband feeds will be presented, which are now developing for SKA and VLBI2010, which is a kind of Tapered Slot Antenna or other of traveling wave antenna.","PeriodicalId":325870,"journal":{"name":"2011 XXXth URSI General Assembly and Scientific Symposium","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115199380","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}
引用次数: 1
Electromagnetically equivalent dynamic model of seismic and atmospheric and ionospheric conjoined network of Turkey: The State Space Approach 土耳其地震、大气和电离层联合网络的电磁等效动力学模型:国家空间方法
2011 XXXth URSI General Assembly and Scientific Symposium Pub Date : 2011-10-20 DOI: 10.1109/URSIGASS.2011.6050951
T. Sengor
{"title":"Electromagnetically equivalent dynamic model of seismic and atmospheric and ionospheric conjoined network of Turkey: The State Space Approach","authors":"T. Sengor","doi":"10.1109/URSIGASS.2011.6050951","DOIUrl":"https://doi.org/10.1109/URSIGASS.2011.6050951","url":null,"abstract":"This research concerns itself with modeling the seismicity-related geo-data as the self-optimization process of an electromagnetically equivalent device and developing a less accurate but fast model. The electromagnetically equivalent device model is extended as considering the whole Earth like a complete system. The crustal structures are considered as a complex network of distributed circuits involving slot antenna arrays, open waveguides, cavities, transmission strip lines, attenuators, frequency converters, dividers, couplings in the electromagnetically equivalent device model of the complete system of Earth (EEDMCSE). The variations at the geo-data taken at any port of the EEDMCSE give some functional relationships on the electromagnetic characteristics of the distributed complex network explained above. The approach is applied to Marmara and Aegean Regions of Anatolia.","PeriodicalId":325870,"journal":{"name":"2011 XXXth URSI General Assembly and Scientific Symposium","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115533418","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}
引用次数: 3
EISCAT aperture synthesis imaging (EASI 3D) for the EISCAT 3D project EISCAT孔径合成成像(EASI 3D)用于EISCAT 3D项目
2011 XXXth URSI General Assembly and Scientific Symposium Pub Date : 2011-10-20 DOI: 10.1109/URSIGASS.2011.6050894
C. L. Hoz, V. Belyey
{"title":"EISCAT aperture synthesis imaging (EASI 3D) for the EISCAT 3D project","authors":"C. L. Hoz, V. Belyey","doi":"10.1109/URSIGASS.2011.6050894","DOIUrl":"https://doi.org/10.1109/URSIGASS.2011.6050894","url":null,"abstract":"Aperture Synthesis Imaging Radar (ASIR) is the technology, code-named EASI 3D, adopted by the EISCAT 3D project, that will give the new radar system imaging capabilities in 3-dimensions including sub-beam resolution in the plane across the transmitter antenna beam. When complemented by pulse compression techniques, it will provide 3-dimensional images of certain types of incoherent scatter radar targets with resolution of the order of 100 metres at 100 km range in any direction illuminated by the transmitter beam. The cross-beam resolution will vary as the inverse of the range squared. This ability will open new research opportunities to map small structures associated with non-homogeneous, non-steady, unstable processes such as aurora, summer and winter polar radar echoes (PMSE and PMWE), Natural Enhanced Ion Acoustic Lines (NEIALs), structures excited by HF ionospheric heating, meteors, space debris, and possibly others.","PeriodicalId":325870,"journal":{"name":"2011 XXXth URSI General Assembly and Scientific Symposium","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115559527","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}
引用次数: 1
Vertical ionosphere sounding using continuous signals with linear frequency modulation 利用线性调频连续信号进行垂直电离层探测
2011 XXXth URSI General Assembly and Scientific Symposium Pub Date : 2011-10-20 DOI: 10.1109/URSIGASS.2011.6051145
A. Podlesny, V. Kurkin, A. Medvedev, K. Ratovsky
{"title":"Vertical ionosphere sounding using continuous signals with linear frequency modulation","authors":"A. Podlesny, V. Kurkin, A. Medvedev, K. Ratovsky","doi":"10.1109/URSIGASS.2011.6051145","DOIUrl":"https://doi.org/10.1109/URSIGASS.2011.6051145","url":null,"abstract":"Consideration of the digital chirp sounder design for the modern systems of a geophysical monitoring, communication channels state forecasting and the research problems solution is given. Given the comparative results of pulsed and of continuous signal vertical sounding ionosondes.","PeriodicalId":325870,"journal":{"name":"2011 XXXth URSI General Assembly and Scientific Symposium","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116129844","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}
引用次数: 8
Photometry of THz radiation using Golay cell detector 用Golay细胞探测器测光太赫兹辐射
2011 XXXth URSI General Assembly and Scientific Symposium Pub Date : 2011-10-20 DOI: 10.1109/URSIGASS.2011.6051287
L. Fernandes, P. Kaufmann, R. Marcon, A. S. Kudaka, A. Marun, R. Godoy, E. Bortolucci, M. Zakia, J. A. Diniz
{"title":"Photometry of THz radiation using Golay cell detector","authors":"L. Fernandes, P. Kaufmann, R. Marcon, A. S. Kudaka, A. Marun, R. Godoy, E. Bortolucci, M. Zakia, J. A. Diniz","doi":"10.1109/URSIGASS.2011.6051287","DOIUrl":"https://doi.org/10.1109/URSIGASS.2011.6051287","url":null,"abstract":"The measurement of THz radiation in the continuum presents new technical challenges concerning materials, frequency filters and detection devices. We present the first results of a radiometric system using Golay cell as a detector, for the whole > 15 THz range, and at discrete frequencies centered at 2, 10 and 30 THz. The system was designed to measure solar THz radiation. It is capable to detect small solar bursts, with a large dynamic range to be able to detect larger events.","PeriodicalId":325870,"journal":{"name":"2011 XXXth URSI General Assembly and Scientific Symposium","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122720645","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}
引用次数: 17
Transient plane-wave decomposition of reflected TE Gaussian-beam from moving dielectric-magnetic plana interface 移动介质-磁平面界面反射TE高斯光束瞬态平面波分解
2011 XXXth URSI General Assembly and Scientific Symposium Pub Date : 2011-10-20 DOI: 10.1109/URSIGASS.2011.6050361
T. Melamed, Inbal Adar, Boaz Shetzer
{"title":"Transient plane-wave decomposition of reflected TE Gaussian-beam from moving dielectric-magnetic plana interface","authors":"T. Melamed, Inbal Adar, Boaz Shetzer","doi":"10.1109/URSIGASS.2011.6050361","DOIUrl":"https://doi.org/10.1109/URSIGASS.2011.6050361","url":null,"abstract":"This paper is concerned with applying plane-wave decomposition for scattering of a pulsed-beam from a fast moving planar dielectric discontinuity under the frame work of Special Relativity.","PeriodicalId":325870,"journal":{"name":"2011 XXXth URSI General Assembly and Scientific Symposium","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122618023","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}
引用次数: 0
Thin microwave antenna for intracavitary heating of bile duct carcinoma — Experimental evaluations on performances of antenna using a swine 用于胆管癌腔内加热的薄微波天线。猪天线性能的实验评价
2011 XXXth URSI General Assembly and Scientific Symposium Pub Date : 2011-10-20 DOI: 10.1109/URSIGASS.2011.6051382
K. Saito, Kousuke Tsubouchi, Masaharu Takahashi, K. Ito
{"title":"Thin microwave antenna for intracavitary heating of bile duct carcinoma — Experimental evaluations on performances of antenna using a swine","authors":"K. Saito, Kousuke Tsubouchi, Masaharu Takahashi, K. Ito","doi":"10.1109/URSIGASS.2011.6051382","DOIUrl":"https://doi.org/10.1109/URSIGASS.2011.6051382","url":null,"abstract":"In recent years, various types of medical applications of microwaves have widely been investigated and reported. Among them, microwave thermal therapy is one of the useful applications and is modality for cancer treatment. In this treatment, there are several schemes of microwave heating. The authors have been studying thin coaxial antenna for intracavitary microwave heating aiming at the treatment of bile duct carcinoma. In this treatment, an endoscope is first inserted into the duodenum and a long and flexible coaxial antenna is then inserted into the forceps channel of the endoscope, which is used to insert the tool for surgical treatment. Finally, the antenna is guided to the bile duct through the papilla of Vater, which is located in the duodenum, and is inserted in the bile duct. Up to now, the heating characteristics of the antenna are investigated by numerical simulation, experiment using tissue-equivalent phantom and extracted organs. In this study, the authors have an experience on animal experiment using a swine. In the experiment, temperature rises around the antenna inserted into the bile duct were measured. From the results of this experiment, cooling effect by blood circulation was cleared.","PeriodicalId":325870,"journal":{"name":"2011 XXXth URSI General Assembly and Scientific Symposium","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122952063","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}
引用次数: 2
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