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2012 International Symposium on Antennas and Propagation (ISAP)最新文献

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Secure communications using Interference Alignment in MIMO interference channels 在MIMO干扰信道中使用干扰对准保护通信
2012 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2012-12-31 DOI: 10.1587/COMEX.3.50
S. Sasaki, T. Shimizu, H. Iwai, H. Sasaoka
{"title":"Secure communications using Interference Alignment in MIMO interference channels","authors":"S. Sasaki, T. Shimizu, H. Iwai, H. Sasaoka","doi":"10.1587/COMEX.3.50","DOIUrl":"https://doi.org/10.1587/COMEX.3.50","url":null,"abstract":"In this paper, we considered secure communications using the interference alignment technique in the MIMO interference channels. It is presented as a result of quantitative evaluation of the secrecy rate that secure communication is possible where the number of antennas at the authorize transmitter and receiver is greater than or similar to that of the eavesdropper.","PeriodicalId":262455,"journal":{"name":"2012 International Symposium on Antennas and Propagation (ISAP)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126444025","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: 4
Angular resolution improvement of ocean surface current radar 海洋表面流雷达角分辨率的提高
2012 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2012-12-31 DOI: 10.1587/TRANSCOM.E96.B.2469
Hiroyoshi Yamada, N. Ozawa, Y. Yamaguchi, Keizo Hirano, H. Ito
{"title":"Angular resolution improvement of ocean surface current radar","authors":"Hiroyoshi Yamada, N. Ozawa, Y. Yamaguchi, Keizo Hirano, H. Ito","doi":"10.1587/TRANSCOM.E96.B.2469","DOIUrl":"https://doi.org/10.1587/TRANSCOM.E96.B.2469","url":null,"abstract":"Ocean surface current radar is a Doppler radar to observe oceanographic information using the Bragg scattering resonance mechanism [1]. In this paper, we consider angular resolution enhancement of the ocean surface current radar. The radar employs an antenna array with FM-i-CW operation, then it can resolve angular distribution by Digital Beam Forming (DBF) method and distance can be discriminated by the FM-i-CW radar. In order to obtain sufficient angular resolution, array length should be expanded by increasing the number of elements of the array. Recently, a signal processing technique which can extend the aperture length virtually has proposed, that is called the Khatri-Rao (KR) product array. The angular resolution can be improved without changing the physical aperture length of the array antenna by using this method [2]. The ocean surface current radar is operated in very low frequency. Therefore it is the very important factor to achieve required angular resolution with narrower array length. In this paper, to ensure that the KR product array processing is valid in angular resolution enhancement for the ocean surface current radar, we apply the KR product array to actual data set of the radar and verify the performance.","PeriodicalId":262455,"journal":{"name":"2012 International Symposium on Antennas and Propagation (ISAP)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131510669","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
Compact antenna arrangement for MIMO sensor in indoor environment 室内环境下MIMO传感器的紧凑天线布置
2012 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2012-12-31 DOI: 10.1587/TRANSCOM.E96.B.2491
N. Honma, K. Nishimori, Hiroaki Sato, Y. Tsunekawa
{"title":"Compact antenna arrangement for MIMO sensor in indoor environment","authors":"N. Honma, K. Nishimori, Hiroaki Sato, Y. Tsunekawa","doi":"10.1587/TRANSCOM.E96.B.2491","DOIUrl":"https://doi.org/10.1587/TRANSCOM.E96.B.2491","url":null,"abstract":"In this paper, the antenna arrangement for the MIMO sensor has been proposed. In this arrangement, the transmitting and receiving antennas are placed together. The numerical analysis of the indoor propagation based on the raytracing method is carried out. The intrusion detection performance with the various antenna arrangements are evaluated for the human positions all over the room. The numerical analysis results showed that the proposed antenna arrangement method can achieve more than 90 % of the detection rate, that is comparable to that of the conventional arrangement even though the proposed arrangement requires the space half of the conventional one.","PeriodicalId":262455,"journal":{"name":"2012 International Symposium on Antennas and Propagation (ISAP)","volume":"49 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121010841","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: 6
AC resistance of copper clad aluminum wires 铜包铝线的交流电阻
2012 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2012-12-31 DOI: 10.1587/TRANSCOM.E96.B.2462
N. Guan, Chihiro Kamidaki, T. Shinmoto, K. Yashiro
{"title":"AC resistance of copper clad aluminum wires","authors":"N. Guan, Chihiro Kamidaki, T. Shinmoto, K. Yashiro","doi":"10.1587/TRANSCOM.E96.B.2462","DOIUrl":"https://doi.org/10.1587/TRANSCOM.E96.B.2462","url":null,"abstract":"We have numerically analyzed the AC resistance caused by the skin and proximity effects for a circular wire. It is experimentally and theoretically demonstrated that CCA wires have lower resistance than Cu ones at some circumstances. The CCA wires will be very useful in power transfer systems because they are light-weight, cost-effective and even low-loss.","PeriodicalId":262455,"journal":{"name":"2012 International Symposium on Antennas and Propagation (ISAP)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122160520","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: 6
Application of optimized sparse antenna array in near range 3D microwave imaging 优化稀疏天线阵列在近距离三维微波成像中的应用
2012 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2012-12-31 DOI: 10.1587/TRANSCOM.E96.B.2542
Yaolong Qi, W. Tan, Xueming Peng, Yanping Wang, W. Hong
{"title":"Application of optimized sparse antenna array in near range 3D microwave imaging","authors":"Yaolong Qi, W. Tan, Xueming Peng, Yanping Wang, W. Hong","doi":"10.1587/TRANSCOM.E96.B.2542","DOIUrl":"https://doi.org/10.1587/TRANSCOM.E96.B.2542","url":null,"abstract":"Near range three-dimensional (3D) microwave imaging techniques have broad application prospects in the field of concealed weapon detection, biomedical imaging, nondestructive testing, etc[1]. In this paper, the technique of optimized sparse antenna array is applied to near range 3D microwave imaging, which can greatly reduce the complexity of imaging systems.","PeriodicalId":262455,"journal":{"name":"2012 International Symposium on Antennas and Propagation (ISAP)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121827881","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: 4
Electromagnetic power transmission through two circular apertures in parallel conducting planes penetrated by a long cylinder 电磁功率通过由长圆柱体穿透的平行导电平面上的两个圆孔传输
2012 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2012-12-31 DOI: 10.1587/TRANSCOM.E96.B.2455
Y. S. Lee, Seun-Keun Park
{"title":"Electromagnetic power transmission through two circular apertures in parallel conducting planes penetrated by a long cylinder","authors":"Y. S. Lee, Seun-Keun Park","doi":"10.1587/TRANSCOM.E96.B.2455","DOIUrl":"https://doi.org/10.1587/TRANSCOM.E96.B.2455","url":null,"abstract":"A problem of power transmission into two cylinder-penetrated circular apertures in parallel conducting planes is studied rigorously. The scattered fields are represented in terms of discrete and continuous modes by using the Weber transform and superposition principle. The boundary conditions are enforced to obtain a set of simultaneous equations for the discrete modal coefficients. The transmission coefficient is represented in fast convergent series which is amenable to computation. The transmission coefficient is evaluated for various geometric parameters to show the behaviour of a power penetration into cylinder-penetrated apertures.","PeriodicalId":262455,"journal":{"name":"2012 International Symposium on Antennas and Propagation (ISAP)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116718594","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
Design of optimal MIMO channel under line-of-sight environment by using directional antenna 基于定向天线的视距环境下最优MIMO信道设计
2012 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2012-12-01 DOI: 10.1587/COMEX.2.62
Y. Hori, D. Uchida, H. Arai
{"title":"Design of optimal MIMO channel under line-of-sight environment by using directional antenna","authors":"Y. Hori, D. Uchida, H. Arai","doi":"10.1587/COMEX.2.62","DOIUrl":"https://doi.org/10.1587/COMEX.2.62","url":null,"abstract":"This paper presented the channel capacity improvement by the distributed antenna arrangement and directional antennas under LOS environment. The simulation results showed that the proposed system provided higher channel capacity than the centralized antenna system. From experimental results, the proposed system achieved low correlation and saved up to 84% of transmit power under indoor environment. The proposed system is expected to provide the optimal channel matrix to maximize the channel capacity by the use of high directivity l antenna.","PeriodicalId":262455,"journal":{"name":"2012 International Symposium on Antennas and Propagation (ISAP)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132697864","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
Evaluation of SAR around an implanted cardiac pacemaker caused by mobile radio terminal 移动无线电终端对植入心脏起搏器周围SAR的评价
2012 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2012-06-01 DOI: 10.1587/TRANSCOM.E95.B.2129
Y. Endo, K. Saito, Soichi Watanabe, Masaharu Takahashi, K. Ito
{"title":"Evaluation of SAR around an implanted cardiac pacemaker caused by mobile radio terminal","authors":"Y. Endo, K. Saito, Soichi Watanabe, Masaharu Takahashi, K. Ito","doi":"10.1587/TRANSCOM.E95.B.2129","DOIUrl":"https://doi.org/10.1587/TRANSCOM.E95.B.2129","url":null,"abstract":"This paper discusses about designed mobile phone model to resonate at 2 GHz. A 900 MHz band is widely used in resent mobile phone system. SAR around the pacemaker is calculated with mobile phone model was evaluated here.","PeriodicalId":262455,"journal":{"name":"2012 International Symposium on Antennas and Propagation (ISAP)","volume":"192 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121100643","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: 6
Distribution of energy flow by dielectric waveguide with rhombic dielectric structure along a middle layer 具有菱形介质结构的介质波导沿中间层的能量流分布
2012 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2012-04-11 DOI: 10.1587/elex.9.698
R. Ozaki, T. Yamasaki
{"title":"Distribution of energy flow by dielectric waveguide with rhombic dielectric structure along a middle layer","authors":"R. Ozaki, T. Yamasaki","doi":"10.1587/elex.9.698","DOIUrl":"https://doi.org/10.1587/elex.9.698","url":null,"abstract":"Light propagation in periodic structure waveguide such as photonic crystals waveguide is both theoretical and practical interest in many areas of physics and engineering. As these applications, there are devices such as an optical resonator, an optical waveguide filter, and integrated optical devices. Consequently, in the design of photonic crystal structures with periodic constants identical to the optical wavelength, it is important to investigate the stop band region or photonic band-gaps. Though it is not analyzed the propagation constants in detailed in Bragg region, many analysis results are shown only the distribution of the electromagnetic fields by using the FDTD method or another numerical techniques.","PeriodicalId":262455,"journal":{"name":"2012 International Symposium on Antennas and Propagation (ISAP)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116327142","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: 7
Future perspectives of advancing multimodal polsar technology, its rapid worldwide expansion, and its plethora of diversified applications 多式模态偏振技术的未来展望，其在世界范围内的快速扩展，以及其大量的多样化应用
2012 International Symposium on Antennas and Propagation (ISAP) Pub Date : 2011-07-24 DOI: 10.1109/IGARSS.2011.6049377
W. Boerner
{"title":"Future perspectives of advancing multimodal polsar technology, its rapid worldwide expansion, and its plethora of diversified applications","authors":"W. Boerner","doi":"10.1109/IGARSS.2011.6049377","DOIUrl":"https://doi.org/10.1109/IGARSS.2011.6049377","url":null,"abstract":"With the un-abating global population increase our natural resources are stressed as never before, and the global day/night monitoring of the terrestrial covers from the mesosphere to the litho-sphere becomes all the more urgent. Microwave radar sensors are ideally suited for space imaging because those are almost weather independent, and microwaves propagate through the atmosphere with little deteriorating effects due to clouds, storms, rain, fog aerosol and haze. Globally humidity, haze and aerosols next to cloudiness are increasing at a rather rapid pace, whereas only 20 years ago all of those covered only 48% of the globe, today those have increased to about 62% and within another 20 years may exceed 80% for irreversible reasons. Thus, optical remote sensing from space especially in the tropical and sub-tropical vegetated belts is already and will become ever more ineffective, and microwave remote sensing technology must now be advanced strongly and most rapidly hand in hand with digital communications technology because operationally it is more rapidly available especially for disaster mitigation assistance.","PeriodicalId":262455,"journal":{"name":"2012 International Symposium on Antennas and Propagation (ISAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130096145","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
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