Pub Date : 2007-06-09DOI: 10.1109/APS.2007.4396628
G. Lombardi, R. Graglia
This paper describes a new numerical technique to compute singular and nearly singular potential integrals with machine precision by working directly in the parent reference-frame.
本文介绍了一种新的数值计算方法，直接在母体参考系中计算奇异和近奇异势积分，达到机器精度。
{"title":"Accurate evaluation of potential integrals with Gauss quadrature formulas for rational functions","authors":"G. Lombardi, R. Graglia","doi":"10.1109/APS.2007.4396628","DOIUrl":"https://doi.org/10.1109/APS.2007.4396628","url":null,"abstract":"This paper describes a new numerical technique to compute singular and nearly singular potential integrals with machine precision by working directly in the parent reference-frame.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"689 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114645681","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 : 2007-06-09DOI: 10.1109/APS.2007.4395961
Tonny Rubæk, Peter Meincke, Oleksiy S. Kim
The log-phase formulation is applied for the reconstruction of images from a simulation of a three-dimensional imaging system. By using this formulation, a clear improvement in the quality of the reconstructed images is achieved compared to the case in which the usual complex phasor notation is employed.
{"title":"Three-dimensional microwave imaging for breast-cancer detection using the log-phase formulation","authors":"Tonny Rubæk, Peter Meincke, Oleksiy S. Kim","doi":"10.1109/APS.2007.4395961","DOIUrl":"https://doi.org/10.1109/APS.2007.4395961","url":null,"abstract":"The log-phase formulation is applied for the reconstruction of images from a simulation of a three-dimensional imaging system. By using this formulation, a clear improvement in the quality of the reconstructed images is achieved compared to the case in which the usual complex phasor notation is employed.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121820883","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 : 2007-06-09DOI: 10.1109/APS.2007.4396205
L. Manica, P. Rocca, A. Martini, A. Massa
This contribution presents an innovative approach based on an optimal excitation matching procedure. By exploiting the relationship between independently-optimal sum and difference patterns, the dimension of the solution space is considerably reduced and efficiently sampled by taking into account the presence of array elements more suitable to change sub-array membership. In the following, the proposed technique is described pointing out, through a representative case, its potentialities and effectiveness in dealing with large arrays.
{"title":"Computationally-effective optimal excitation matching for the synthesis of large monopulse arrays","authors":"L. Manica, P. Rocca, A. Martini, A. Massa","doi":"10.1109/APS.2007.4396205","DOIUrl":"https://doi.org/10.1109/APS.2007.4396205","url":null,"abstract":"This contribution presents an innovative approach based on an optimal excitation matching procedure. By exploiting the relationship between independently-optimal sum and difference patterns, the dimension of the solution space is considerably reduced and efficiently sampled by taking into account the presence of array elements more suitable to change sub-array membership. In the following, the proposed technique is described pointing out, through a representative case, its potentialities and effectiveness in dealing with large arrays.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116711140","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 : 2007-06-09DOI: 10.1109/APS.2007.4396271
J. Bossard, S. Yun, Yan Tang, J.A. Smith, D. Werner, T. Mayer
A DFSS filter comprised of a-Si blocks on a polyimide substrate was designed to have dual stopbands in the mid-IR. Full-wave simulation of this structure including measured material properties predicts strong polarization independent stopbands at 80 THz and 90 THz for normally incident IR radiation. This design was fabricated using e-beam lithography. Efforts are currently underway to characterize the fabricated structure and to generate additional DFSS designs using GA optimization.
{"title":"Multiband all-dielectric frequency selective surface filters for the mid-infrared","authors":"J. Bossard, S. Yun, Yan Tang, J.A. Smith, D. Werner, T. Mayer","doi":"10.1109/APS.2007.4396271","DOIUrl":"https://doi.org/10.1109/APS.2007.4396271","url":null,"abstract":"A DFSS filter comprised of a-Si blocks on a polyimide substrate was designed to have dual stopbands in the mid-IR. Full-wave simulation of this structure including measured material properties predicts strong polarization independent stopbands at 80 THz and 90 THz for normally incident IR radiation. This design was fabricated using e-beam lithography. Efforts are currently underway to characterize the fabricated structure and to generate additional DFSS designs using GA optimization.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116927107","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 : 2007-06-09DOI: 10.1109/APS.2007.4396576
Jong-Kyou Kim, Seung-Kab Ryu, Dae-Heon Lee, I. Hwang
This paper concerns a circular CPW-fed slot antenna suitable for compact ultra-wide band applications, in which its operating frequency range covers 10MHz up to 2000MHz or far more. A simple design method is presented and expanded to some qualitative analysis on the resonant mode of the proposed antenna for understanding the broadening process of the impedance bandwidth. The measurement results of the fabricated prototype antenna is also given and compared with those of the simulated.
{"title":"Study of circular CPW-fed slot antenna with a resistive load","authors":"Jong-Kyou Kim, Seung-Kab Ryu, Dae-Heon Lee, I. Hwang","doi":"10.1109/APS.2007.4396576","DOIUrl":"https://doi.org/10.1109/APS.2007.4396576","url":null,"abstract":"This paper concerns a circular CPW-fed slot antenna suitable for compact ultra-wide band applications, in which its operating frequency range covers 10MHz up to 2000MHz or far more. A simple design method is presented and expanded to some qualitative analysis on the resonant mode of the proposed antenna for understanding the broadening process of the impedance bandwidth. The measurement results of the fabricated prototype antenna is also given and compared with those of the simulated.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116929618","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 : 2007-06-09DOI: 10.1109/APS.2007.4396428
R. Speciale
Computations, performed with the well-known Mathematica program, have produced rigorous, closed-form, symbolic expressions of the cylindrical E-field, and H-field components of a planar, circular-aperture field-distribution that appears to generate a radiation-pattern exhibiting the propagation-invariance of the so-called "pseudo non-diffracting" optical Bessel-beams. The new planar, circular-aperture field-distribution obtained includes radial-, azimuth-, and axial-components of both the E-field, and H-field with different linearly-dependent azimuth phases. Further, only the axial-(Sz*), and azimuth-(Sphi*) components of the complex poynting vector are non-zero, while the radial component Sr* is identically-zero, everywhere on and above the aperture-plane, at all radial distances from the broadside-axis, and at all axial-distances from the aperture-plane. The generated wave-front has the shape of a 3D helicoid-surface, with a pitch being a function of the kz/kr ratio. The diffraction-properties of the generated radiation- pattern are being computed by using the "direct electromagnetic field integration " method, reported by Walter Franz in 1948, and reviewed by Chen-To Tai in 2000.
{"title":"A pseudo non-diffracting microwave vortex","authors":"R. Speciale","doi":"10.1109/APS.2007.4396428","DOIUrl":"https://doi.org/10.1109/APS.2007.4396428","url":null,"abstract":"Computations, performed with the well-known Mathematica program, have produced rigorous, closed-form, symbolic expressions of the cylindrical E-field, and H-field components of a planar, circular-aperture field-distribution that appears to generate a radiation-pattern exhibiting the propagation-invariance of the so-called \"pseudo non-diffracting\" optical Bessel-beams. The new planar, circular-aperture field-distribution obtained includes radial-, azimuth-, and axial-components of both the E-field, and H-field with different linearly-dependent azimuth phases. Further, only the axial-(Sz*), and azimuth-(Sphi*) components of the complex poynting vector are non-zero, while the radial component Sr* is identically-zero, everywhere on and above the aperture-plane, at all radial distances from the broadside-axis, and at all axial-distances from the aperture-plane. The generated wave-front has the shape of a 3D helicoid-surface, with a pitch being a function of the kz/kr ratio. The diffraction-properties of the generated radiation- pattern are being computed by using the \"direct electromagnetic field integration \" method, reported by Walter Franz in 1948, and reviewed by Chen-To Tai in 2000.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117279155","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 : 2007-06-09DOI: 10.1109/APS.2007.4396471
D. Lu, R. Wu, Zhigang Su, Wei Huang
In this paper, we proposed a space-frequency GPS anti-jamming technique with constant beamwidth. The proposed method sets up a new data model by Fourier transformation. On the basis of the new model, the optimal output SINR can be obtained by using Capon beamforming similar to the only spatial domain. Also, in order to obtain the distortless GPS signal, the beampattern with constant beamwidth is generated by focusing transformation technique.
{"title":"A space-frequency anti-jamming algorithm for GPS","authors":"D. Lu, R. Wu, Zhigang Su, Wei Huang","doi":"10.1109/APS.2007.4396471","DOIUrl":"https://doi.org/10.1109/APS.2007.4396471","url":null,"abstract":"In this paper, we proposed a space-frequency GPS anti-jamming technique with constant beamwidth. The proposed method sets up a new data model by Fourier transformation. On the basis of the new model, the optimal output SINR can be obtained by using Capon beamforming similar to the only spatial domain. Also, in order to obtain the distortless GPS signal, the beampattern with constant beamwidth is generated by focusing transformation technique.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"38 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120850830","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 : 2007-06-09DOI: 10.1109/APS.2007.4395854
Kyounghwan Lee, Y. Chung
In this paper, 5-elements Yagi-Uda type UHF tag antennas, resonated at 915MHz, are designed to increase the gain and FBR (front-back-ratio) of tag antennas and extend the reading range. The designs have better FBR than a conventional Yagi-Uda tag antenna designs.
{"title":"High gain Yagi-Uda UHF RFID tag antennas","authors":"Kyounghwan Lee, Y. Chung","doi":"10.1109/APS.2007.4395854","DOIUrl":"https://doi.org/10.1109/APS.2007.4395854","url":null,"abstract":"In this paper, 5-elements Yagi-Uda type UHF tag antennas, resonated at 915MHz, are designed to increase the gain and FBR (front-back-ratio) of tag antennas and extend the reading range. The designs have better FBR than a conventional Yagi-Uda tag antenna designs.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"23 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120852818","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 : 2007-06-09DOI: 10.1109/APS.2007.4395690
K. A. Griffith, I. Gupta
In this work, a combination of the two methods mentioned above is used in order to find a matrix that maps the response without mutual coupling effects to the response with mutual coupling effects. This work assumes the coupling matrix is Toeplitz and uses a few observations in order to estimate the matrix. The remainder of this paper provides the formulation of the problem for a linear array, results for a linear dipole array, and conclusions and comments on future work.
{"title":"Reduced order antenna array calibration","authors":"K. A. Griffith, I. Gupta","doi":"10.1109/APS.2007.4395690","DOIUrl":"https://doi.org/10.1109/APS.2007.4395690","url":null,"abstract":"In this work, a combination of the two methods mentioned above is used in order to find a matrix that maps the response without mutual coupling effects to the response with mutual coupling effects. This work assumes the coupling matrix is Toeplitz and uses a few observations in order to estimate the matrix. The remainder of this paper provides the formulation of the problem for a linear array, results for a linear dipole array, and conclusions and comments on future work.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"117 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120874852","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 : 2007-06-09DOI: 10.1109/APS.2007.4396017
N. Honma, K. Nishimori, Y. Takatori, A. Ohta, S. Kubota
In this paper, a compact MIMO terminal antenna employing Yagi-Uda arrays with common director elements is proposed. The Yagi-Uda array provides a high gain in the horizontal direction even when the array is arranged horizontally. The size of the proposed antenna is fairly small because the director elements are shared between two Yagi-Uda arrays that face each other and the length of the array is approximately half of two individual Yagi-Uda arrays.
{"title":"Proposal of compact MIMO terminal antenna employing Yagi-Uda array with common director elements","authors":"N. Honma, K. Nishimori, Y. Takatori, A. Ohta, S. Kubota","doi":"10.1109/APS.2007.4396017","DOIUrl":"https://doi.org/10.1109/APS.2007.4396017","url":null,"abstract":"In this paper, a compact MIMO terminal antenna employing Yagi-Uda arrays with common director elements is proposed. The Yagi-Uda array provides a high gain in the horizontal direction even when the array is arranged horizontally. The size of the proposed antenna is fairly small because the director elements are shared between two Yagi-Uda arrays that face each other and the length of the array is approximately half of two individual Yagi-Uda arrays.","PeriodicalId":117975,"journal":{"name":"2007 IEEE Antennas and Propagation Society International Symposium","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121101535","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：