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2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)最新文献

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DOA estimation of multi-band signals using a compressed sensing technique 基于压缩感知技术的多波段信号DOA估计
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2016-12-01 DOI: 10.1109/APSIPA.2016.7820797
T. Nishimura, Taiki Endo, T. Ohgane, Y. Ogawa
{"title":"DOA estimation of multi-band signals using a compressed sensing technique","authors":"T. Nishimura, Taiki Endo, T. Ohgane, Y. Ogawa","doi":"10.1109/APSIPA.2016.7820797","DOIUrl":"https://doi.org/10.1109/APSIPA.2016.7820797","url":null,"abstract":"Much attention has been paid to direction of arrival (DOA) estimation using a compressed sensing technique. In our previous study, we have proposed a method to estimate DOAs of multi-band signals using an array antenna at a receiver. As a result, we have produced an improvement of the probability of correct estimation. Moreover, the method can deal with waves exceeding the degrees of freedom of the array. However, we have assumed that incident waves have multi-bands where complex amplitudes are the same. First, in this paper, we propose a method that allows the estimation of DOAs when only the phases at the bands are different using not the complex amplitudes but powers of the signals. Second, we extend the technique in such a way that it can estimate DOAs of the signals having different amplitudes among bands.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125857620","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
Measurement setups for millimeter-wave antennas at 60/140/270 GHz bands 60/140/270 GHz频段毫米波天线的测量设置
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958663
X. Qing, Zhi Ning Chen
{"title":"Measurement setups for millimeter-wave antennas at 60/140/270 GHz bands","authors":"X. Qing, Zhi Ning Chen","doi":"10.1109/IWAT.2014.6958663","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958663","url":null,"abstract":"Antenna development at millimeter-wave (mmW) bands has many unique challenging issues wherein the measurement is one of the toughest one because of the expensive testing setup, limited system dynamic range, complicated and tedious calibration as well as measurement procedures. Furthermore, cable, connector or probe used in the measurement shows non-ignorable effect on the measurement results of the antenna under test (AUT), which must be considered carefully in the measurement system configuration. In this paper, we present three measurement setups for mmW antennas at 60 GHz, 140 GHz and 270 GHz bands, respectively. The detailed setup configurations are addressed to achieve the maximum system dynamic range with the available commercial accessories. The setups are successfully used to characterize a number of antennas at 60/140/270 GHz bands with different feeding connections (coax, waveguide and probe). The measured radiation patterns show very good agreement with the simulations.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115236057","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: 11
Anisotropic cloaking of a metallic cylinder 金属圆柱体的各向异性隐身
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958642
L. Matekovits, Y. Ranga, T. Bird, K. Esselle, M. Orefice
{"title":"Anisotropic cloaking of a metallic cylinder","authors":"L. Matekovits, Y. Ranga, T. Bird, K. Esselle, M. Orefice","doi":"10.1109/IWAT.2014.6958642","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958642","url":null,"abstract":"Electromagnetic footprint reduction for a metallic cylinder wrapped in a printed meta-surface is discussed. The meta-surface consists of a quasi-periodic pattern arrangement printed on a homogeneous dielectric layer of constant thickness, which is conformal to the cylinder, giving rise to an anisotropic cloak. Numerical analysis of the radar cross section (RCS) and field topography around the cloaked cylinder for different polarizations of the incident plane wave are considered, and it is demonstrated that the proposed solution reduces the RCS of the cylinder differently for variable incidence.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125068411","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
Towards analytic path loss models in on-body wireless communications 体上无线通信中路径损耗解析模型的研究
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958668
D. Manteuffel
{"title":"Towards analytic path loss models in on-body wireless communications","authors":"D. Manteuffel","doi":"10.1109/IWAT.2014.6958668","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958668","url":null,"abstract":"There is a significant trend towards on-body wireless networks in both, consumer electronics and bio-medical applications. Like any other wireless system its design depends heavily on the radio channel. In contrast to free space communications there are not many channel models available and the few are statistical models that allow only for limited physical insight. Therefore, an analytical model that is based on the physics of on-body radio wave propagation combined with statistical parameters to account for the variety of the human body anatomy would be highly desirable. In this research, we evaluate the feasibility of analytic on-body path loss models in wireless body area networks based on Norton surface waves. The evaluation is based on a refined formulation of Norton surface waves (Norton, 1937) excited by an antenna near dissipative media by Bannister (Bannister, 1984) and its applicability to the constitutive parameters of different body tissues at typical operation frequencies of on-body wireless applications (0.4 <; f[GHz] <;60). The numerical verification is based on homogeneous flat body scenarios. This is followed by examples of propagation paths on an inhomogeneous anatomically correct human body model. As the Norton theory is based on a flat propagation scenario the effect of the curvature of the body has to be introduced by corrective terms for the ground wave and the Norton surface wave, respectively. The results obtained are promising with respect to the development of analytic path loss modes for on-body wireless propagations.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125253443","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
Low-cost smart antennas for advanced wireless systems 用于先进无线系统的低成本智能天线
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958618
S. Gao, Q. Luo
{"title":"Low-cost smart antennas for advanced wireless systems","authors":"S. Gao, Q. Luo","doi":"10.1109/IWAT.2014.6958618","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958618","url":null,"abstract":"Smart antenna is a key technology for mobile communications, satellite communications, radar and sensors as it can enable the wireless systems to achieve the optimum performance by electronically steering its maximum radiation towards the desired directions while forming nulls against interfering sources. Traditional smart antennas are, however, complicated in structure, bulky, power hungry and costly. For commercial applications, it is important to reduce the size, mass, power consumption and cost of smart antennas. Firstly, this paper presents an introduction to smart antennas, followed by a brief review of various types of low-cost smart antennas. Then, several recent examples of low-cost smart antennas reported by the author's group are presented and discussed. These antennas are capable of achieving electronic beam steering within a wide angular range, while having compact sizes, low power consumption and low cost. A detailed list of references is given in the end of this paper.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125506297","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
Dual band split-ring patch antenna on ceramic for satellite application 卫星用陶瓷双频分环贴片天线
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958681
M. Islam, M. H. Ullah, N. Misran, M. Ismail, B. Yatim, M. Ali
{"title":"Dual band split-ring patch antenna on ceramic for satellite application","authors":"M. Islam, M. H. Ullah, N. Misran, M. Ismail, B. Yatim, M. Ali","doi":"10.1109/IWAT.2014.6958681","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958681","url":null,"abstract":"Design and analysis of a split ring patch antenna on a ceramic material substrate is presented in this paper. The proposed split ring antenna designed and analyzed by using computer aided high frequency electromagnetic solver HFSS. The result shows 170 MHz (7.25 GHz-7.42 GHz) and 173 MHz (8.0 GHz-8.173 GHz) impedance bandwidth with 0.8 dBi and 4.67 dBi gains are achieved at two resonant frequencies 7.32 GHz and 8.07 GHz respectively. The symmetric and almost steady radiation pattern with maximum radiation efficiency of 91% and 94.03% makes the proposed antenna suitable for C and X band satellite application. The input impedance and current distribution of the proposed antenna are also analyzed.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121991298","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 a UWB printed G-shaped monopole antenna using characteristic modes 基于特征模式的超宽带印刷g型单极天线设计
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958679
F. Gozasht, Kevin Po, A. Mohan
{"title":"Design of a UWB printed G-shaped monopole antenna using characteristic modes","authors":"F. Gozasht, Kevin Po, A. Mohan","doi":"10.1109/IWAT.2014.6958679","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958679","url":null,"abstract":"This paper presents a novel G-shaped compact monopole UWB antenna printed on FR4 substrate with coplanar waveguide (CPW) feeding. The proposed antenna operates over the frequency band between 3 and 11 GHz offering a fractional impedance bandwidth of around 110 %. The antenna is designed by analysing the modal currents calculated using the characteristic mode theory. Experimental results on reflection coefficient agree well with simulations and the proposed antenna has a desirable gain and radiation pattern characteristics over the ultra-wideband frequency range. The overall dimensions of the antenna are 28 × 35 × 1.6 mm3 which makes it a good candidate for many ultra-wide-band radio applications.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116721029","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
Field computation in inhomogeneous media using successive projections 用连续投影计算非均匀介质中的场
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958615
S. Hay
{"title":"Field computation in inhomogeneous media using successive projections","authors":"S. Hay","doi":"10.1109/IWAT.2014.6958615","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958615","url":null,"abstract":"We formulate a successive projections approach to computing field scattering by inhomogeneous electromagnetic media. Solutions for the projections are derived in the space and space-harmonic domains. The key projections are shown to be expressible in terms of homogeneous-media Green's functions with complex wavenumbers, indicating possibilities for evaluation using existing representations and parallel techniques. An efficient implementation using three-dimensional FFTs is described and results illustrate convergence and accuracy.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130486576","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
A polarization reconfigurable antenna for dual-band operation 用于双频操作的极化可重构天线
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958597
P. Qin, Y. Guo, C. Ding
{"title":"A polarization reconfigurable antenna for dual-band operation","authors":"P. Qin, Y. Guo, C. Ding","doi":"10.1109/IWAT.2014.6958597","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958597","url":null,"abstract":"A polarization reconfigurable microstrip patch antenna is presented for wireless local area network (WLAN) dual-band operation (2.4 GHz and 5.8 GHz). The microstrip patch is aperture coupled to a microstrip line located along the diagonal line of the patch. The dual-band operation is realized by adjusting the frequency ratio of the TM10 and TM30 modes using four shorting posts. PIN diodes are employed to control the connection between the centre of each edge of the patch and the ground. By switching the PIN diodes, the proposed antenna can radiate either horizontal, vertical, or 45° linear polarization in the two frequency bands. The antenna are fabricated and measured. Good agreement is observed between the measured and the simulated results on reflection coefficients.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"53 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129099611","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
The design of reconfigurable antenna arrays using the method of vector space projections 利用向量空间投影法设计可重构天线阵列
2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT) Pub Date : 2014-03-04 DOI: 10.1109/IWAT.2014.6958598
Ruchi Chaturvedi, R. Tomar
{"title":"The design of reconfigurable antenna arrays using the method of vector space projections","authors":"Ruchi Chaturvedi, R. Tomar","doi":"10.1109/IWAT.2014.6958598","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958598","url":null,"abstract":"The problem of element failure in antenna arrays is studied using the wellborn method of vector space projections (VSP). The use of VSP allows one to impose a set of desired constraints thru “alternating projections” to furnish a design of self healing arrays i.e. retrieving the sane performance, over the degraded one. By introducing a projection onto the set of dynamic range constraint(DRC), worthy results can be realized even in the case of 50% array element failure.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124523924","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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