Pub Date : 2009-06-01DOI: 10.1109/APS.2009.5171965
T. Tan, M. Potter
The FDTD Total Field Scattered Field (TF/SF) formulation presented in [1] is a powerful tool for simulating scattered fields reflected from objects with extremely complex geometries and heterogeneities. Unfortunately, accurate TF/SF for general modes at present is only limited to a 2D application since the present Analytic Field Propagator (AFP) of [2] when applied to a 3D problem consumes a large amount of storage. With the help of discrete signal techniques, it is possible to significantly improve the memory constraint and the accuracy of the present AFP so that the technique is practical for any dimensions. However, one may still wonder if a true time-domain propagator directly derived from the FDTD update equations can be constructed. In other words, the FDTD scheme is a true time-domain technique and why should the TF/SF be solved via the frequency domain? In this paper, we show that a true FDTD planewave exists and its solution is fairly straightforward.
{"title":"Perfectly matched plane wave source in FDTD via efficient and true time-domain update equations","authors":"T. Tan, M. Potter","doi":"10.1109/APS.2009.5171965","DOIUrl":"https://doi.org/10.1109/APS.2009.5171965","url":null,"abstract":"The FDTD Total Field Scattered Field (TF/SF) formulation presented in [1] is a powerful tool for simulating scattered fields reflected from objects with extremely complex geometries and heterogeneities. Unfortunately, accurate TF/SF for general modes at present is only limited to a 2D application since the present Analytic Field Propagator (AFP) of [2] when applied to a 3D problem consumes a large amount of storage. With the help of discrete signal techniques, it is possible to significantly improve the memory constraint and the accuracy of the present AFP so that the technique is practical for any dimensions. However, one may still wonder if a true time-domain propagator directly derived from the FDTD update equations can be constructed. In other words, the FDTD scheme is a true time-domain technique and why should the TF/SF be solved via the frequency domain? In this paper, we show that a true FDTD planewave exists and its solution is fairly straightforward.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122692819","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 : 2009-06-01DOI: 10.1109/APS.2009.5171715
Z. Peng, Jin-Fa Lee
Numerical analysis of wide band large antenna array plays a crucial role in the prediction of design performance prior to construction. Since these arrays mostly are electrically large and include complex geometries, accurate simulation is a great challenge. However, recent developments of domain decomposition method (DDM) [1][2] provides us an efficient way to obtain field solution at each frequency point. However, for many real-life phased array applications, the spectral responses over a wide frequency band are usually needed. For frequency domain CEM approaches, the model order reduction (MORe) techniques are often employed for fast frequency sweep. In this paper, we study a few MORe techniques and apply them for large finite antenna array. Through our numerical studies and plots of pole distributions, we found that the number of expansion points increases significantly with the size of array. By using the current existing MORe method, the costs for modeling electrically large electromagnetic problems are still prohibitive.
{"title":"Study of model order reduction techniques for modeling large finite antenna array","authors":"Z. Peng, Jin-Fa Lee","doi":"10.1109/APS.2009.5171715","DOIUrl":"https://doi.org/10.1109/APS.2009.5171715","url":null,"abstract":"Numerical analysis of wide band large antenna array plays a crucial role in the prediction of design performance prior to construction. Since these arrays mostly are electrically large and include complex geometries, accurate simulation is a great challenge. However, recent developments of domain decomposition method (DDM) [1][2] provides us an efficient way to obtain field solution at each frequency point. However, for many real-life phased array applications, the spectral responses over a wide frequency band are usually needed. For frequency domain CEM approaches, the model order reduction (MORe) techniques are often employed for fast frequency sweep. In this paper, we study a few MORe techniques and apply them for large finite antenna array. Through our numerical studies and plots of pole distributions, we found that the number of expansion points increases significantly with the size of array. By using the current existing MORe method, the costs for modeling electrically large electromagnetic problems are still prohibitive.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122466625","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 : 2009-06-01DOI: 10.1109/APS.2009.5171756
D. Liao, K. Sarabandi
For propagation over a rough terrain, the physical statistical properties of the ground surface have a direct impact on the statistics of the propagating signal. When the transmitter and receiver are close, the LOS (line-of-sight) space wave from the transmitting antenna, when it exists, provides the primary contribution to the total received signal, as the coherent reflection from the underlying rough surface is reduced by the random scattering effects. However, over a long distance, as the propagation path approaches the grazing condition, in accordance with the Rayleigh criterion, the surface appears electrically smooth again and coherent cancellation between the direct and ground scattered signals is re-established. These qualitative observations are consistent with numerical simulation results presented in previous works [1, 2]; specifically, as it has been shown in [1], for fixed transmitter and receiver locations, the far field propagation loss increases with the surface rms height as expected but also shows considerable dependence on the two-point surface correlation length. Furthermore, at grazing propagation, it is no longer proper to calculate coherent signal statistics by a complete replacement of the rough surface with a smooth surface positioned at the original surface's physical mean height, for now the effective height is a function of both rms height and correlation length. Although numerical models such as those prescribed in [1, 2] have proven to be efficient simulators in dealing with the near-ground channel, it is also convenient to quantitatively capture the aforementioned observations—which have not been sufficiently addressed and explained in existing literature—in analytical formulations.
{"title":"An effective low-grazing reflection coefficient for modeling groundwave propagation over randomly rough terrain","authors":"D. Liao, K. Sarabandi","doi":"10.1109/APS.2009.5171756","DOIUrl":"https://doi.org/10.1109/APS.2009.5171756","url":null,"abstract":"For propagation over a rough terrain, the physical statistical properties of the ground surface have a direct impact on the statistics of the propagating signal. When the transmitter and receiver are close, the LOS (line-of-sight) space wave from the transmitting antenna, when it exists, provides the primary contribution to the total received signal, as the coherent reflection from the underlying rough surface is reduced by the random scattering effects. However, over a long distance, as the propagation path approaches the grazing condition, in accordance with the Rayleigh criterion, the surface appears electrically smooth again and coherent cancellation between the direct and ground scattered signals is re-established. These qualitative observations are consistent with numerical simulation results presented in previous works [1, 2]; specifically, as it has been shown in [1], for fixed transmitter and receiver locations, the far field propagation loss increases with the surface rms height as expected but also shows considerable dependence on the two-point surface correlation length. Furthermore, at grazing propagation, it is no longer proper to calculate coherent signal statistics by a complete replacement of the rough surface with a smooth surface positioned at the original surface's physical mean height, for now the effective height is a function of both rms height and correlation length. Although numerical models such as those prescribed in [1, 2] have proven to be efficient simulators in dealing with the near-ground channel, it is also convenient to quantitatively capture the aforementioned observations—which have not been sufficiently addressed and explained in existing literature—in analytical formulations.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"252 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122488791","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 : 2009-06-01DOI: 10.1109/APS.2009.5171709
O. Ozgun, R. Mittra, M. Kuzuoglu
During the last few years, the Characteristic Basis Function Method (CBFM) has been introduced to solve large-scale electromagnetic problems. The CBFM is a non-iterative domain decomposition approach that employs characteristic basis functions (CBFs), called the high-level physics-based basis functions, to represent the fields inside each sub-domain. This technique was first introduced to solve time-harmonic electromagnetic problems in the context of the Method of Moments (MoM) [1]. Quite recently, the CBFM procedure has been utilized for the first time in the Finite Element Method (FEM), and has been named the “Characteristic Basis Finite Element Method (CBFEM)” [2–4]. This method, which is different from the previous MoM-based CBFM, has been used in both the quasi-static [2] and the time-harmonic regimes [3–4], by generating the CBFs via point charges and dipole-type sources, respectively. Two major features of the CBFEM are: (i) it leads to a reduced-matrix that can be handled by using direct—as opposed to iterative—solvers; and (ii) its parallelizable nature can be taken advantage of to reduce the overall computation time. The basic steps of the CBFEM algorithm are summarized as follows: (i) Divide the computational domain into a number of subdomains; (ii) Generate the CBFs that are tailored to each individual subdomain; (iii) Express the unknowns as a weighted sum of CBFs; (iv) Transform the original matrix into a smaller one (called reduced-matrix) by using the Galerkin procedure, which uses the CBFs as both basis and testing functions; (v) Solve the reduced matrix for the weight coefficients, and substitute the coefficients into the series expressions to find the unknowns inside the entire computational domain.
{"title":"A version of the Characteristic Basis Finite Element Method (CBFEM) by utilizing Physical Optics for large-scale electromagnetic problems","authors":"O. Ozgun, R. Mittra, M. Kuzuoglu","doi":"10.1109/APS.2009.5171709","DOIUrl":"https://doi.org/10.1109/APS.2009.5171709","url":null,"abstract":"During the last few years, the Characteristic Basis Function Method (CBFM) has been introduced to solve large-scale electromagnetic problems. The CBFM is a non-iterative domain decomposition approach that employs characteristic basis functions (CBFs), called the high-level physics-based basis functions, to represent the fields inside each sub-domain. This technique was first introduced to solve time-harmonic electromagnetic problems in the context of the Method of Moments (MoM) [1]. Quite recently, the CBFM procedure has been utilized for the first time in the Finite Element Method (FEM), and has been named the “Characteristic Basis Finite Element Method (CBFEM)” [2–4]. This method, which is different from the previous MoM-based CBFM, has been used in both the quasi-static [2] and the time-harmonic regimes [3–4], by generating the CBFs via point charges and dipole-type sources, respectively. Two major features of the CBFEM are: (i) it leads to a reduced-matrix that can be handled by using direct—as opposed to iterative—solvers; and (ii) its parallelizable nature can be taken advantage of to reduce the overall computation time. The basic steps of the CBFEM algorithm are summarized as follows: (i) Divide the computational domain into a number of subdomains; (ii) Generate the CBFs that are tailored to each individual subdomain; (iii) Express the unknowns as a weighted sum of CBFs; (iv) Transform the original matrix into a smaller one (called reduced-matrix) by using the Galerkin procedure, which uses the CBFs as both basis and testing functions; (v) Solve the reduced matrix for the weight coefficients, and substitute the coefficients into the series expressions to find the unknowns inside the entire computational domain.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122836725","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 : 2009-06-01DOI: 10.1109/APS.2009.5172372
Chen Guo, Richard C. Liu
A practical design guidance of a wide band shielded GPR antenna is discussed. The designed antenna is used in a GPR system working at 400MHz center frequency. Measured data show that with properly designed shielding and absorbing materials, the bow-tie antenna with shield performs as desired. Besides antenna design, the key issues in a shielded GPR antenna design are the depth of the shield box and the absorbing material insertion.
{"title":"Design of a shielded antenna system for ground penetrating radar applications","authors":"Chen Guo, Richard C. Liu","doi":"10.1109/APS.2009.5172372","DOIUrl":"https://doi.org/10.1109/APS.2009.5172372","url":null,"abstract":"A practical design guidance of a wide band shielded GPR antenna is discussed. The designed antenna is used in a GPR system working at 400MHz center frequency. Measured data show that with properly designed shielding and absorbing materials, the bow-tie antenna with shield performs as desired. Besides antenna design, the key issues in a shielded GPR antenna design are the depth of the shield box and the absorbing material insertion.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"352 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122844955","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 : 2009-06-01DOI: 10.1109/APS.2009.5172089
N. Cartwright, K. Oughstun
Many physical materials that we wish to interrogate with electromagnetic signals are conductive. Thus, we need to understand the propagation dynamics of electromagnetic pulses through dispersive, conductive materials. Closed-form solutions are preferable to numerical solutions in that they provide an explicit expression for the dependence of the propagated field on the physical parameters. Here, we study the propagation of an ultrawideband electromagnetic pulse through a semiconductor with complex dielectric permittivity given by a Debye model with static levels of conductivity. Although the Debye model with static conductivity provides a fairly rudimentary approximation to the electromagnetic response of conductive materials such as rock, soil, and biological tissue, it is a more complex and complete model than those used in previous analytic and numerical research. For example, Wait [1], Song and Chen [2], and Dvorak [3] assumed both the dielectric permittivity and the electric conductivity to be constant for their anayltic studies of electromagnetic pulse propagation, as did Luebbers, et al. [4, 5] in their numerical work. In addition, King and Wu [6] used a non-causal approximation of the complex dielectric permittivity that is valid only for very low frequency pulses.
{"title":"Pulse propagation in a Debye medium with static conductivity","authors":"N. Cartwright, K. Oughstun","doi":"10.1109/APS.2009.5172089","DOIUrl":"https://doi.org/10.1109/APS.2009.5172089","url":null,"abstract":"Many physical materials that we wish to interrogate with electromagnetic signals are conductive. Thus, we need to understand the propagation dynamics of electromagnetic pulses through dispersive, conductive materials. Closed-form solutions are preferable to numerical solutions in that they provide an explicit expression for the dependence of the propagated field on the physical parameters. Here, we study the propagation of an ultrawideband electromagnetic pulse through a semiconductor with complex dielectric permittivity given by a Debye model with static levels of conductivity. Although the Debye model with static conductivity provides a fairly rudimentary approximation to the electromagnetic response of conductive materials such as rock, soil, and biological tissue, it is a more complex and complete model than those used in previous analytic and numerical research. For example, Wait [1], Song and Chen [2], and Dvorak [3] assumed both the dielectric permittivity and the electric conductivity to be constant for their anayltic studies of electromagnetic pulse propagation, as did Luebbers, et al. [4, 5] in their numerical work. In addition, King and Wu [6] used a non-causal approximation of the complex dielectric permittivity that is valid only for very low frequency pulses.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114281355","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 : 2009-06-01DOI: 10.1109/APS.2009.5172258
A. Austin, M. Neve, G. Rowe
A 2D TMz implementation of the Finite-Difference Time-Domain algorithm is used to model radio-wave propagation from multiple transmitter locations in an eight storey building. From the steady-state field data, the Signal-to-Interference Ratio (SIR) is calculated for down-link scenarios. One transmitter is located on each floor and two base-station configurations are examined: aligned and staggered. Vertically-aligned transmitters are found to have better SIR performance - 9% of the sectors in the aligned configuration and 23% in the staggered configuration have SIRs less than 5 dB. The central services core significantly reduces the SIR, however this effect can be alleiviated by including another set of vertically-aligned transmitters.
{"title":"Modelling interference for indoor wireless systems using the FDTD method","authors":"A. Austin, M. Neve, G. Rowe","doi":"10.1109/APS.2009.5172258","DOIUrl":"https://doi.org/10.1109/APS.2009.5172258","url":null,"abstract":"A 2D TMz implementation of the Finite-Difference Time-Domain algorithm is used to model radio-wave propagation from multiple transmitter locations in an eight storey building. From the steady-state field data, the Signal-to-Interference Ratio (SIR) is calculated for down-link scenarios. One transmitter is located on each floor and two base-station configurations are examined: aligned and staggered. Vertically-aligned transmitters are found to have better SIR performance - 9% of the sectors in the aligned configuration and 23% in the staggered configuration have SIRs less than 5 dB. The central services core significantly reduces the SIR, however this effect can be alleiviated by including another set of vertically-aligned transmitters.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114434362","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 : 2009-06-01DOI: 10.1109/APS.2009.5172257
H. Buddendick, T. Eibert
A stochastic approach to model scattering effects of complex objects in comprehensive system simulation scenarios has been used in a simple and consistent way. In the given example the system simulation complexity is thereby reduced from appr. 100 000 triangles per vehicle object down to 80 triangles plus additional bistatic RCS table look-ups. Consequently, detailed deterministic analyses of radio channel signal variations can be carried out for critical communication or sensing systems in an efficient and accurate way. Significant deviations can be observed, as expected, particularly at the shadow boundaries for grazing incidence. It should be mentioned that for larger scenarios and rather low number of observation points a system level ray tracing instead of the ray launching is expected to bring performance benefits. Nevertheless, a good approximation of the results obtained with the much more complex polygonal models has been proven.
{"title":"Radio channel simulations using multiple scattering center models","authors":"H. Buddendick, T. Eibert","doi":"10.1109/APS.2009.5172257","DOIUrl":"https://doi.org/10.1109/APS.2009.5172257","url":null,"abstract":"A stochastic approach to model scattering effects of complex objects in comprehensive system simulation scenarios has been used in a simple and consistent way. In the given example the system simulation complexity is thereby reduced from appr. 100 000 triangles per vehicle object down to 80 triangles plus additional bistatic RCS table look-ups. Consequently, detailed deterministic analyses of radio channel signal variations can be carried out for critical communication or sensing systems in an efficient and accurate way. Significant deviations can be observed, as expected, particularly at the shadow boundaries for grazing incidence. It should be mentioned that for larger scenarios and rather low number of observation points a system level ray tracing instead of the ray launching is expected to bring performance benefits. Nevertheless, a good approximation of the results obtained with the much more complex polygonal models has been proven.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114436824","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 : 2009-06-01DOI: 10.1109/APS.2009.5172121
Y. Ranga, K. Esselle
A coplanar wave guide (CPW) fed semicircular slot antenna (SSA) with step impedance transformer is presented. Omni-directional radiation pattern in whole band with theoretical gain of 3 dBi with variation of ±0.5 dB is achieved. It has shown that this design of SSA gives experimental bandwidth of 10.7 GHz for VSWR ≪2. Present results show suitability of structure for UWB communication.
{"title":"CPW-Fed semicircular slot antenna for UWB PCB applications","authors":"Y. Ranga, K. Esselle","doi":"10.1109/APS.2009.5172121","DOIUrl":"https://doi.org/10.1109/APS.2009.5172121","url":null,"abstract":"A coplanar wave guide (CPW) fed semicircular slot antenna (SSA) with step impedance transformer is presented. Omni-directional radiation pattern in whole band with theoretical gain of 3 dBi with variation of ±0.5 dB is achieved. It has shown that this design of SSA gives experimental bandwidth of 10.7 GHz for VSWR ≪2. Present results show suitability of structure for UWB communication.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114587040","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 : 2009-06-01DOI: 10.1109/APS.2009.5171889
S. Jeong, BumJin Cho, Yong-Soo Kwak, J. Byun, A. Kim
Multi-band antenna covering GSM850/GSM900/DCS1800/PCS1900/UMTS2100 in mobile phones is presented. The proposed antenna is kind of a modified PIFA which consists of PIFA and T-branch. The bandwidth in low and high band is achieved using gap coupling between low and high band arm. And also bandwidth in low-band is improved by the coupling between T-branch and metal ring along the edge of the housing. Experimental and simulation results using SEMCAD are presented.
{"title":"Design and analysis of multi-band antenna for mobile handset applications","authors":"S. Jeong, BumJin Cho, Yong-Soo Kwak, J. Byun, A. Kim","doi":"10.1109/APS.2009.5171889","DOIUrl":"https://doi.org/10.1109/APS.2009.5171889","url":null,"abstract":"Multi-band antenna covering GSM850/GSM900/DCS1800/PCS1900/UMTS2100 in mobile phones is presented. The proposed antenna is kind of a modified PIFA which consists of PIFA and T-branch. The bandwidth in low and high band is achieved using gap coupling between low and high band arm. And also bandwidth in low-band is improved by the coupling between T-branch and metal ring along the edge of the housing. Experimental and simulation results using SEMCAD are presented.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121881163","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}
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