IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)最新文献
This paper treats the interaction of short-pulse electromagnetic radiation with one-dimensional (1D) moderately rough dielectric interfaces, which arise in many realistic problems, such as buried object imaging. Our ultimate goal is to incorporate physics-based, computationally efficient, forward models in such inverse scattering scenarios, in order to improve the overall computational performance. In this connection, we recently analyzed time-harmonic forward and inverse scattering from moderately rough surfaces, using a Gabor-based Gaussian beam algorithm (see Galdi, V. et al., IEEE Trans. Antennas Propagat., 2001). Here, we extend this forward scattering algorithm to pulsed excitation via a physical optics (PO) based approach in conjunction with pulsed beam discretization.
本文研究了短脉冲电磁辐射与一维中等粗糙介质界面的相互作用，这种相互作用存在于许多现实问题中，如地物成像。我们的最终目标是将基于物理的、计算效率高的正演模型整合到这种逆散射场景中，以提高整体计算性能。在这方面，我们最近使用基于gabor的高斯波束算法(参见Galdi, V. et al.， IEEE Trans.)分析了中等粗糙表面的时谐正散射和逆散射。天线Propagat。, 2001)。在这里，我们将这种前向散射算法扩展到脉冲激励，通过物理光学(PO)为基础的方法，结合脉冲光束离散化。
{"title":"Time-domain two-dimensional scattering by moderately rough dielectric interfaces via narrow-waisted Gaussian beams","authors":"V. Galdi, L. Felsen, D. Castañón","doi":"10.1109/APS.2001.960205","DOIUrl":"https://doi.org/10.1109/APS.2001.960205","url":null,"abstract":"This paper treats the interaction of short-pulse electromagnetic radiation with one-dimensional (1D) moderately rough dielectric interfaces, which arise in many realistic problems, such as buried object imaging. Our ultimate goal is to incorporate physics-based, computationally efficient, forward models in such inverse scattering scenarios, in order to improve the overall computational performance. In this connection, we recently analyzed time-harmonic forward and inverse scattering from moderately rough surfaces, using a Gabor-based Gaussian beam algorithm (see Galdi, V. et al., IEEE Trans. Antennas Propagat., 2001). Here, we extend this forward scattering algorithm to pulsed excitation via a physical optics (PO) based approach in conjunction with pulsed beam discretization.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132388288","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}
In this contribution a new automated approach for dual-band patch antenna design is presented. Starting from a rectangular patch shape (mother structure), genetic algorithms (GA) are adopted to detect, among all the possible shapes (child structures) that can be obtained from the mother structure, the optimal patch shape matching some given requirements without having to examine the whole set of child shapes. In order to analyse the mother rectangular patch frequency behaviour, the method of moments (MoM) in the spatial domain is employed and, then, such an analysis is used for the GA research procedure. As an example of the code synthesis capabilities, the design of a dual band patch is finally presented.
{"title":"Automated dual band patch antenna design by a genetic algorithm based numerical code","authors":"F. Castellana, F. Bilotti, L. Vegni","doi":"10.1109/APS.2001.959561","DOIUrl":"https://doi.org/10.1109/APS.2001.959561","url":null,"abstract":"In this contribution a new automated approach for dual-band patch antenna design is presented. Starting from a rectangular patch shape (mother structure), genetic algorithms (GA) are adopted to detect, among all the possible shapes (child structures) that can be obtained from the mother structure, the optimal patch shape matching some given requirements without having to examine the whole set of child shapes. In order to analyse the mother rectangular patch frequency behaviour, the method of moments (MoM) in the spatial domain is employed and, then, such an analysis is used for the GA research procedure. As an example of the code synthesis capabilities, the design of a dual band patch is finally presented.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132498521","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}
There are few asymptotic solutions in the literature that can efficiently evaluate surface fields excited on electrically large dielectric coated circular cylinders. Furthermore, to the best of our knowledge, none of the asymptotic solutions yield results along the paraxial (nearly axial) region. This is a well-known problem that has been observed for perfect electrical conducting (PEC) and impedance cylinders in the past. In this paper, a novel space-domain representation for the surface fields excited by an elementary current source is presented. These new expressions are very accurate along the paraxial region and in some cases can be made valid away from the paraxial region with some minor modifications.
{"title":"Paraxial space-domain formulation for surface fields on large dielectric coated circular cylinders","authors":"V. Erturk, Roberto G. Rojas","doi":"10.1109/APS.2001.960080","DOIUrl":"https://doi.org/10.1109/APS.2001.960080","url":null,"abstract":"There are few asymptotic solutions in the literature that can efficiently evaluate surface fields excited on electrically large dielectric coated circular cylinders. Furthermore, to the best of our knowledge, none of the asymptotic solutions yield results along the paraxial (nearly axial) region. This is a well-known problem that has been observed for perfect electrical conducting (PEC) and impedance cylinders in the past. In this paper, a novel space-domain representation for the surface fields excited by an elementary current source is presented. These new expressions are very accurate along the paraxial region and in some cases can be made valid away from the paraxial region with some minor modifications.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129987282","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}
The curl antenna was proposed as a simple radiator to generate circular polarized electromagnetic waves (see Nakano, H. et al., 1993). The design has been suggested for applications in wireless communications (see Colburn, J.S. and Rahmat-Samii, Y., 1996). However, it cannot work well when it is placed close to a finite PEC ground plane due to its reverse image. Recently, the electromagnetic band-gap (EBG) surface, also referred to as photonic band-gap (PBG) surface, has attracted researchers' interest because it has a potential to build low profiled and high efficiency antennas (see Sievenpiper, D. et al., 1999; Zhan Li and Rahmat-Samii, Y., 2000). The square curl antenna over an EBG surface is investigated in depth. Compared to the conventional curl antenna, it has the attractive feature of low profile as well as circular polarization. The antenna height, ground plane size and band-gap effect are analyzed in detail by the finite difference time domain (FDTD) method. This low profiled CP antenna is suitable for GPS, LAN, satellite links and other wireless communication applications.
旋度天线被提出作为一种简单的辐射器来产生圆形极化电磁波(见Nakano, H. et al.， 1993)。该设计已被建议应用于无线通信(见Colburn, J.S.和Rahmat-Samii, Y.， 1996)。然而，当它被放置在一个有限的PEC地平面附近时，由于它的反向像，它不能很好地工作。最近，电磁带隙(EBG)表面，也被称为光子带隙(PBG)表面，吸引了研究人员的兴趣，因为它有可能构建低轮廓和高效率的天线(见Sievenpiper, D. et al.， 1999;李展和Rahmat-Samii, Y.， 2000)。本文对电子束表面上的方形旋度天线进行了深入研究。与传统的旋曲天线相比，它具有低轮廓和圆极化等吸引人的特点。利用时域有限差分(FDTD)方法对天线高度、接地面尺寸和带隙效应进行了详细分析。这种低轮廓的CP天线适用于GPS，局域网，卫星链路和其他无线通信应用。
{"title":"Curl antennas over electromagnetic band-gap surface: a low profiled design for CP applications","authors":"Fan Yang, Y. Rahmat-Samii","doi":"10.1109/APS.2001.960111","DOIUrl":"https://doi.org/10.1109/APS.2001.960111","url":null,"abstract":"The curl antenna was proposed as a simple radiator to generate circular polarized electromagnetic waves (see Nakano, H. et al., 1993). The design has been suggested for applications in wireless communications (see Colburn, J.S. and Rahmat-Samii, Y., 1996). However, it cannot work well when it is placed close to a finite PEC ground plane due to its reverse image. Recently, the electromagnetic band-gap (EBG) surface, also referred to as photonic band-gap (PBG) surface, has attracted researchers' interest because it has a potential to build low profiled and high efficiency antennas (see Sievenpiper, D. et al., 1999; Zhan Li and Rahmat-Samii, Y., 2000). The square curl antenna over an EBG surface is investigated in depth. Compared to the conventional curl antenna, it has the attractive feature of low profile as well as circular polarization. The antenna height, ground plane size and band-gap effect are analyzed in detail by the finite difference time domain (FDTD) method. This low profiled CP antenna is suitable for GPS, LAN, satellite links and other wireless communication applications.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130096935","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}
D. Jiao, A. Ergin, B. Shanker, E. Michielssen, Jianming Jin
We present a hybrid time-domain finite element-boundary integral (FE-BI) method for analyzing 3D electromagnetic open-region transient scattering phenomena. This method has three unique features. The first is the hybridization scheme that combines the FE and BI representations of the fields. Instead of following the standard hybridization scheme used in the frequency domain, we propose a novel scheme that preserves the sparsity of the finite element matrix and that yields solutions free of spurious modes associated with interior BI resonances. The second feature is the use of a fast algorithm, the multilevel plane-wave time-domain (PWTD) method, for evaluating the BI. Invoking this scheme greatly reduces the computational expense when an object of large electrical dimensions is considered. Third, the FE component of the solver employs curvilinear tetrahedral elements to precisely model the scatterer's geometry and higher-order vector basis functions to accurately represent the fields.
{"title":"A fast higher-order time-domain finite element-boundary integral method for 3-D electromagnetic scattering analysis","authors":"D. Jiao, A. Ergin, B. Shanker, E. Michielssen, Jianming Jin","doi":"10.1109/APS.2001.959466","DOIUrl":"https://doi.org/10.1109/APS.2001.959466","url":null,"abstract":"We present a hybrid time-domain finite element-boundary integral (FE-BI) method for analyzing 3D electromagnetic open-region transient scattering phenomena. This method has three unique features. The first is the hybridization scheme that combines the FE and BI representations of the fields. Instead of following the standard hybridization scheme used in the frequency domain, we propose a novel scheme that preserves the sparsity of the finite element matrix and that yields solutions free of spurious modes associated with interior BI resonances. The second feature is the use of a fast algorithm, the multilevel plane-wave time-domain (PWTD) method, for evaluating the BI. Invoking this scheme greatly reduces the computational expense when an object of large electrical dimensions is considered. Third, the FE component of the solver employs curvilinear tetrahedral elements to precisely model the scatterer's geometry and higher-order vector basis functions to accurately represent the fields.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134033537","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}
The assessment of potential hazards caused by electromagnetic interference to electronic systems as well as transmission devices is an essential engineering task. The effect of nearby electrically active objects on the effective radiation characteristics of the phone is yet to be investigated. Examples of this situation include the presence of a similar radiating object nearby the cellular phone, the presence of reflecting objects, resonance conditions between different structures and frequency shift effects. In this paper, a detailed characterization of the effects of EM coupling on the performance of cellular phones placed in close proximity to each other is presented. The analysis is performed numerically using the FDTD method and is focused on the modification of the input impedance and radiation properties of the phone.
{"title":"Electromagnetic field coupling between cellular phones using FDTD analysis","authors":"A. Hamid, M. Alsunaidi","doi":"10.1109/APS.2001.960037","DOIUrl":"https://doi.org/10.1109/APS.2001.960037","url":null,"abstract":"The assessment of potential hazards caused by electromagnetic interference to electronic systems as well as transmission devices is an essential engineering task. The effect of nearby electrically active objects on the effective radiation characteristics of the phone is yet to be investigated. Examples of this situation include the presence of a similar radiating object nearby the cellular phone, the presence of reflecting objects, resonance conditions between different structures and frequency shift effects. In this paper, a detailed characterization of the effects of EM coupling on the performance of cellular phones placed in close proximity to each other is presented. The analysis is performed numerically using the FDTD method and is focused on the modification of the input impedance and radiation properties of the phone.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"44 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133948522","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}
A new iterative technique on surface measured equation of invariance (OSMEI) is proposed for decomposing the method of moment (MoM) matrix of 3D acoustic scattering problem. Its' an extension of the matrix decomposition (MD) by the OSMEI method. In the iterative procedure, the structure and the sparsity rate of OSMEI coefficients remain invariant, and it results in a significant reduction in the memory requirement and computing time. Moreover, it provides a means for systematic improvement of the solution. The numerical results of 3D acoustic scattering of a soft sphere show that this technique takes the attractive features of high accuracy and fast convergence of iterative process.
{"title":"New iterative OSMEI technique to decompose MoM matrix of 3D acoustic scattering problem","authors":"Jinping Ma, W. Che, K. Mei, Yaowu Liu","doi":"10.1109/APS.2001.960020","DOIUrl":"https://doi.org/10.1109/APS.2001.960020","url":null,"abstract":"A new iterative technique on surface measured equation of invariance (OSMEI) is proposed for decomposing the method of moment (MoM) matrix of 3D acoustic scattering problem. Its' an extension of the matrix decomposition (MD) by the OSMEI method. In the iterative procedure, the structure and the sparsity rate of OSMEI coefficients remain invariant, and it results in a significant reduction in the memory requirement and computing time. Moreover, it provides a means for systematic improvement of the solution. The numerical results of 3D acoustic scattering of a soft sphere show that this technique takes the attractive features of high accuracy and fast convergence of iterative process.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131552968","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}
E. Ipatov, A. S. Kryukovsky, D. S. Lukin, D. Rastyagaev, D.N. Chystyakov
Numerical modeling of frequency-modulated (FM) radio-pulse propagation in plasma in focal regions of three-dimensional catastrophe types is fulfilled. As it was shown by D.N. Chystyakov et al.(see Proc. Progress in Electromagnetics Research Symp., p.1085, 2000) and A.S. Kryukovsky et al. (see Jour. of Communications Technology and Electronics, vol.44, no.4, p.423-30, 1999), the catastrophes with corank equal three describe mutual space-time (ST) focusing of electromagnetic waves. In dispersive media, the propagation of an FM electromagnetic wave may be described by an integral uniform asymptotic solution of the Klein-Gordon equation.
{"title":"FM pulses propagation in focal regions of catastrophe types","authors":"E. Ipatov, A. S. Kryukovsky, D. S. Lukin, D. Rastyagaev, D.N. Chystyakov","doi":"10.1109/APS.2001.958896","DOIUrl":"https://doi.org/10.1109/APS.2001.958896","url":null,"abstract":"Numerical modeling of frequency-modulated (FM) radio-pulse propagation in plasma in focal regions of three-dimensional catastrophe types is fulfilled. As it was shown by D.N. Chystyakov et al.(see Proc. Progress in Electromagnetics Research Symp., p.1085, 2000) and A.S. Kryukovsky et al. (see Jour. of Communications Technology and Electronics, vol.44, no.4, p.423-30, 1999), the catastrophes with corank equal three describe mutual space-time (ST) focusing of electromagnetic waves. In dispersive media, the propagation of an FM electromagnetic wave may be described by an integral uniform asymptotic solution of the Klein-Gordon equation.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129377472","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}
An innovative procedure for phaseless near-field measurements is presented. The squared intensity data received by two co-planar probes simultaneously scanning a planar near-field surface are used to retrieve the near-field phase and subsequently to perform the near-field/far-field transformation. The approach requires reduced scan times and low-cost facilities, when compared with existing phase retrieval techniques. Measurements on a microstrip patch antenna for SAR applications are used as experimental validations of the method.
{"title":"An integrated probe for planar near-field only intensity measurements","authors":"S. Costanzo, G. Di Massa","doi":"10.1109/APS.2001.959798","DOIUrl":"https://doi.org/10.1109/APS.2001.959798","url":null,"abstract":"An innovative procedure for phaseless near-field measurements is presented. The squared intensity data received by two co-planar probes simultaneously scanning a planar near-field surface are used to retrieve the near-field phase and subsequently to perform the near-field/far-field transformation. The approach requires reduced scan times and low-cost facilities, when compared with existing phase retrieval techniques. Measurements on a microstrip patch antenna for SAR applications are used as experimental validations of the method.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128938688","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}
Reduced surface wave (RSW) antennas produce only a small amount of surface-wave and lateral-wave radiation since the surface-wave and lateral-wave radiation from the dominant TM/sub 011/ patch mode is suppressed through proper design (see Jackson, D.R. et al., IEEE Trans. Antennas and Propagation, vol.41, no.8, 1993). The mutual coupling between a pair of shorted annular ring (SAR) RSW antennas was studied theoretically and experimentally (see Khayat, M.A. et al., IEEE Trans. Antennas and Propagation, vol.48, no.10, 2000). The study showed that the E-plane mutual coupling between RSW antennas fell off as 1//spl Delta//sup 3/ (for thin substrates), where /spl Delta/ is the center-to-center separation between the antennas. This is a much faster falloff than for conventional microstrip antennas, where the E-plane mutual coupling decays as 1//spl Delta/ (for thin substrates). The weak mutual coupling property makes a RSW array design very promising. The mutual coupling between RSW elements in an array with an arbitrary lattice angle /spl alpha/ is considered. Specifically, the mutual coupling in an equilateral triangular lattice (/spl alpha/=60/spl deg/) and a square lattice (/spl alpha/=90/spl deg/) are studied. Two feeding methods, E-plane feeding and a rotated feeding are considered and results are compared with those of a conventional circular microstrip array. The grating lobe issue is also studied for different lattice angles.
减小表面波(RSW)天线只产生少量的表面波和侧波辐射，因为通过适当的设计可以抑制来自占主导地位的TM/sub 011/ patch模式的表面波和侧波辐射(见Jackson, dr . et al.， IEEE Trans)。天线与传播，第41卷，第1期。8, 1993)。对一对短环形(SAR) RSW天线之间的相互耦合进行了理论和实验研究(见Khayat, ma . et al.， IEEE Trans.)。天线与传播，第48卷，第2期。10, 2000)。研究表明，RSW天线之间的e平面互耦在1//spl Delta//sup 3/(对于薄衬底)时减小，其中/spl Delta/为天线之间的中心间距。这比传统的微带天线衰减得快得多，在传统的微带天线中，e平面互耦衰减为1//spl Delta/(对于薄衬底)。弱互耦合特性使得RSW阵列的设计非常有前途。考虑了任意晶格角/spl α /的阵列中RSW元素之间的相互耦合。具体地，研究了等边三角形晶格(/spl alpha/=60/spl deg/)和方形晶格(/spl alpha/=90/spl deg/)中的互耦问题。考虑了e平面馈电和旋转馈电两种馈电方式，并对传统圆形微带阵列的馈电结果进行了比较。研究了不同晶格角度下的光栅瓣问题。
{"title":"Mutual coupling between reduced surface wave antennas in an array","authors":"R.L. Chen, D. Jackson, J. Williams, S. Long","doi":"10.1109/APS.2001.960078","DOIUrl":"https://doi.org/10.1109/APS.2001.960078","url":null,"abstract":"Reduced surface wave (RSW) antennas produce only a small amount of surface-wave and lateral-wave radiation since the surface-wave and lateral-wave radiation from the dominant TM/sub 011/ patch mode is suppressed through proper design (see Jackson, D.R. et al., IEEE Trans. Antennas and Propagation, vol.41, no.8, 1993). The mutual coupling between a pair of shorted annular ring (SAR) RSW antennas was studied theoretically and experimentally (see Khayat, M.A. et al., IEEE Trans. Antennas and Propagation, vol.48, no.10, 2000). The study showed that the E-plane mutual coupling between RSW antennas fell off as 1//spl Delta//sup 3/ (for thin substrates), where /spl Delta/ is the center-to-center separation between the antennas. This is a much faster falloff than for conventional microstrip antennas, where the E-plane mutual coupling decays as 1//spl Delta/ (for thin substrates). The weak mutual coupling property makes a RSW array design very promising. The mutual coupling between RSW elements in an array with an arbitrary lattice angle /spl alpha/ is considered. Specifically, the mutual coupling in an equilateral triangular lattice (/spl alpha/=60/spl deg/) and a square lattice (/spl alpha/=90/spl deg/) are studied. Two feeding methods, E-plane feeding and a rotated feeding are considered and results are compared with those of a conventional circular microstrip array. The grating lobe issue is also studied for different lattice angles.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126576327","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}
IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)
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