Pub Date : 2006-07-09DOI: 10.1109/APS.2006.1710546
J. Volakis, K. Sertel, G. Mumcu, S. Yarga
Photonic crystals have been the subject of extensive research for almost twenty years. More recently, the physical nature of the constitutive components was diversified to include anisotropic, magnetic, metallic, and nonlinear materials. Greater diversity of physical properties, along with more sophisticated space arrangement of the constituents, can result in qualitatively new features and novel phenomena, such as electromagnetic unidirectionality and the frozen mode regime. The resulting structures are referred to as magnetic photonic crystals (MPCs). This presentation provides analysis that demonstrates the benefits and potential applications of MPCs and degenerate bandgap structures (DBEs) from a numerical and experimental point of view. Three dimensional realizations of antennas and conformal arrays within MPCs are presented using frequency domain and time domain techniques, and preliminary experimental data are given for validation purposes
{"title":"Frozen modes in bounded photonic crystals for high gain antennas","authors":"J. Volakis, K. Sertel, G. Mumcu, S. Yarga","doi":"10.1109/APS.2006.1710546","DOIUrl":"https://doi.org/10.1109/APS.2006.1710546","url":null,"abstract":"Photonic crystals have been the subject of extensive research for almost twenty years. More recently, the physical nature of the constitutive components was diversified to include anisotropic, magnetic, metallic, and nonlinear materials. Greater diversity of physical properties, along with more sophisticated space arrangement of the constituents, can result in qualitatively new features and novel phenomena, such as electromagnetic unidirectionality and the frozen mode regime. The resulting structures are referred to as magnetic photonic crystals (MPCs). This presentation provides analysis that demonstrates the benefits and potential applications of MPCs and degenerate bandgap structures (DBEs) from a numerical and experimental point of view. Three dimensional realizations of antennas and conformal arrays within MPCs are presented using frequency domain and time domain techniques, and preliminary experimental data are given for validation purposes","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"31 2 1","pages":"414-417"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90055336","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 : 2006-07-09DOI: 10.1109/APS.2006.1711596
M.R. Nezhad Ahamdi, G. Rafi, S. Safavi-Naeini
This paper presents an efficient integrated antenna structure compatible with silicon IC process. The antenna consists of a slot antenna on top metal layer of the technology and a rectangular cubic dielectric resonator on top of the slot. The slot configuration of the design isolates the antenna from substrate and thus blocks the antenna interference through the substrate to other RF circuits on substrate
{"title":"An Efficient Integrated Antenna Structure on Low-Resistivity Silicon Substrate","authors":"M.R. Nezhad Ahamdi, G. Rafi, S. Safavi-Naeini","doi":"10.1109/APS.2006.1711596","DOIUrl":"https://doi.org/10.1109/APS.2006.1711596","url":null,"abstract":"This paper presents an efficient integrated antenna structure compatible with silicon IC process. The antenna consists of a slot antenna on top metal layer of the technology and a rectangular cubic dielectric resonator on top of the slot. The slot configuration of the design isolates the antenna from substrate and thus blocks the antenna interference through the substrate to other RF circuits on substrate","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"1 1","pages":"4353-4356"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90193156","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 : 2006-07-09DOI: 10.1109/APS.2006.1710575
B. Chang, Chang-Dae Jeon
The performance of the AMN algorithm is significantly improved by adjusting the convergence parameter for the unit gain constraint while that for the null constraint is fixed during adaptive process in coherent environment. This paper demonstrated that the AMN algorithm in general performs better than the conventional methods with respect to mean square error and the phase delay of the array output to the desired signal. Also, it is shown that the AMN algorithm is robust to increasing number of coherent interferences
{"title":"Performance improvement of alternate mainbeam nulling algorithm in coherent environment","authors":"B. Chang, Chang-Dae Jeon","doi":"10.1109/APS.2006.1710575","DOIUrl":"https://doi.org/10.1109/APS.2006.1710575","url":null,"abstract":"The performance of the AMN algorithm is significantly improved by adjusting the convergence parameter for the unit gain constraint while that for the null constraint is fixed during adaptive process in coherent environment. This paper demonstrated that the AMN algorithm in general performs better than the conventional methods with respect to mean square error and the phase delay of the array output to the desired signal. Also, it is shown that the AMN algorithm is robust to increasing number of coherent interferences","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"50 1","pages":"525-528"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90497694","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 : 2006-07-09DOI: 10.1109/APS.2006.1711029
Junyeon Kim, J. So, Won Jang, C. Cheon
In this paper, instead of multilayered notch antenna, the ridged tapered slot antenna (RTSA) is chosen as an element of wideband phased array antenna (PAA) since it has rigid body and can be easily manufactured by mechanical wire-cutting. In addition, because the RTSA is made of conductor, it doesn't need via-holes which are required to avoid the blind angles out of the operation frequency band. Theses blind angles come from the self resonance of the dielectric material of notch antenna. We developed wide band/wide scan PAA which has a bandwidth of 3:1 and scan volume of plusmn45deg. In order to determine the shape of the RTSA, the active VSWR (AVSWR) of the RTSA was optimized in the numerical waveguide simulator. And then using the E-plane/H-plane simulator, the AVSWR with beam scan angles in E-plane/H-plane are calculated respectively. On the basis of optimized design, numerical analysis of finite arrays was performed by commercial time domain solver. Through the simulation of 10 times 6 quad-element RTSA arrays, the AVSWR at the center element was computed and compared with the measured result. The active element pattern (AEP) of 10 times 6 quad-element RTSA arrays was also computed and had a good agreement with the measured AEP. From the result of the AEP, we can easily predict that 10 times 6 quad-element RTSA arrays have a good beam scanning capabilities
{"title":"The Design of Wideband Phased Array Antenna using Ridged Tapered Slot Antenna","authors":"Junyeon Kim, J. So, Won Jang, C. Cheon","doi":"10.1109/APS.2006.1711029","DOIUrl":"https://doi.org/10.1109/APS.2006.1711029","url":null,"abstract":"In this paper, instead of multilayered notch antenna, the ridged tapered slot antenna (RTSA) is chosen as an element of wideband phased array antenna (PAA) since it has rigid body and can be easily manufactured by mechanical wire-cutting. In addition, because the RTSA is made of conductor, it doesn't need via-holes which are required to avoid the blind angles out of the operation frequency band. Theses blind angles come from the self resonance of the dielectric material of notch antenna. We developed wide band/wide scan PAA which has a bandwidth of 3:1 and scan volume of plusmn45deg. In order to determine the shape of the RTSA, the active VSWR (AVSWR) of the RTSA was optimized in the numerical waveguide simulator. And then using the E-plane/H-plane simulator, the AVSWR with beam scan angles in E-plane/H-plane are calculated respectively. On the basis of optimized design, numerical analysis of finite arrays was performed by commercial time domain solver. Through the simulation of 10 times 6 quad-element RTSA arrays, the AVSWR at the center element was computed and compared with the measured result. The active element pattern (AEP) of 10 times 6 quad-element RTSA arrays was also computed and had a good agreement with the measured AEP. From the result of the AEP, we can easily predict that 10 times 6 quad-element RTSA arrays have a good beam scanning capabilities","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"60 1","pages":"2217-2220"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89170321","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 : 2006-07-09DOI: 10.1109/APS.2006.1711610
Youngchel Kim, Teh-Hong Lee
This paper presents a shaping method for offset dual reflector antennas. The shaping method solves nonlinear equations to obtain an electrically small local dual reflector surface section. A shaped offset dual reflector antenna surface is created by combining them and the desired aperture distribution that is controlled by the location of caustic for each local dual reflector system. In shaping dual reflectors, the principles of geometrical optics (GO), such as conservation of power and Snell's law, have been widely used. In addition, geometrical properties of parabolic main reflector and either elliptic or hyperbolic subreflector surface are used to formulate the shaped surface equations
{"title":"An Approach of Shaping Offset Dual Reflector Antennas by Controlling Location of Caustic for Local Dual Reflector System","authors":"Youngchel Kim, Teh-Hong Lee","doi":"10.1109/APS.2006.1711610","DOIUrl":"https://doi.org/10.1109/APS.2006.1711610","url":null,"abstract":"This paper presents a shaping method for offset dual reflector antennas. The shaping method solves nonlinear equations to obtain an electrically small local dual reflector surface section. A shaped offset dual reflector antenna surface is created by combining them and the desired aperture distribution that is controlled by the location of caustic for each local dual reflector system. In shaping dual reflectors, the principles of geometrical optics (GO), such as conservation of power and Snell's law, have been widely used. In addition, geometrical properties of parabolic main reflector and either elliptic or hyperbolic subreflector surface are used to formulate the shaped surface equations","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"8 1","pages":"4405-4408"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91375228","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 : 2006-07-09DOI: 10.1109/APS.2006.1711479
Kristopher T. Kim
This paper proposes a procedure based on a new set of recurrence relations and compare its performance with previous literature after reviewing the recurrence relations that form the basis of the present-day recursive SSMTC computation technique
{"title":"Rapid Generation of the Scalar Spherical Multipole Translation Matrix using a New Set of Recurrence Relations","authors":"Kristopher T. Kim","doi":"10.1109/APS.2006.1711479","DOIUrl":"https://doi.org/10.1109/APS.2006.1711479","url":null,"abstract":"This paper proposes a procedure based on a new set of recurrence relations and compare its performance with previous literature after reviewing the recurrence relations that form the basis of the present-day recursive SSMTC computation technique","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"191 1","pages":"3909-3912"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79619378","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 : 2006-07-09DOI: 10.1109/APS.2006.1711520
D. Wilton, N. Champagne
A procedure for evaluating the potential integrals on wires as the distance between the source and observation points decreases is presented. The new approach employs a recent technique for numerically evaluating an expression for the exact wire kernel. The formulation is accurate for extremely thin and for closely coupled-wires. Since the procedure is not dependent on the form of the basis function, it is readily adapted to algorithms using higher-order basis functions. Furthermore, the formulation sets the stage for using higher-order wire geometry modeling without singularity extraction as well
{"title":"Integration of the Thin Wire Kernel","authors":"D. Wilton, N. Champagne","doi":"10.1109/APS.2006.1711520","DOIUrl":"https://doi.org/10.1109/APS.2006.1711520","url":null,"abstract":"A procedure for evaluating the potential integrals on wires as the distance between the source and observation points decreases is presented. The new approach employs a recent technique for numerically evaluating an expression for the exact wire kernel. The formulation is accurate for extremely thin and for closely coupled-wires. Since the procedure is not dependent on the form of the basis function, it is readily adapted to algorithms using higher-order basis functions. Furthermore, the formulation sets the stage for using higher-order wire geometry modeling without singularity extraction as well","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"79 1","pages":"4065-4068"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83179519","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 : 2006-07-09DOI: 10.1109/APS.2006.1711564
A. Capozzoli, G. D'Elia, V. Perciabosco, S. Russo
A new approach to the synthesis of wideband arrays that allows the enlargement of the working bandwidth of standard arrays is presented. The approach involves generalizing the technique already introduced in the single frequency case. A synthesis problem is considered wherein the array excitations corresponding to a far-field pattern satisfying at best the design specifications in the prescribed band need to be determined
{"title":"A wide band array synthesis technique","authors":"A. Capozzoli, G. D'Elia, V. Perciabosco, S. Russo","doi":"10.1109/APS.2006.1711564","DOIUrl":"https://doi.org/10.1109/APS.2006.1711564","url":null,"abstract":"A new approach to the synthesis of wideband arrays that allows the enlargement of the working bandwidth of standard arrays is presented. The approach involves generalizing the technique already introduced in the single frequency case. A synthesis problem is considered wherein the array excitations corresponding to a far-field pattern satisfying at best the design specifications in the prescribed band need to be determined","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"85 1","pages":"4233-4236"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83440623","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 : 2006-07-09DOI: 10.1109/APS.2006.1711461
Yaxun Liu, C. Sarris
In this paper, the application of the adaptive mesh refinement finite-difference time-domain (AMR-FDTD) technique to the simulation of dielectric waveguide structures was discussed. Significant computational savings were demonstrated, in comparison with the conventional FDTD technique, while accuracy was largely preserved. This area of problems includes several large-scale applications of interest; modeling of such applications can be dramatically accelerated by employing the proposed technique
{"title":"Modeling of Dielectric Waveguide Structures with a Multilevel Dynamically Adaptive Mesh Refinement (AMR)-FDTD Method","authors":"Yaxun Liu, C. Sarris","doi":"10.1109/APS.2006.1711461","DOIUrl":"https://doi.org/10.1109/APS.2006.1711461","url":null,"abstract":"In this paper, the application of the adaptive mesh refinement finite-difference time-domain (AMR-FDTD) technique to the simulation of dielectric waveguide structures was discussed. Significant computational savings were demonstrated, in comparison with the conventional FDTD technique, while accuracy was largely preserved. This area of problems includes several large-scale applications of interest; modeling of such applications can be dramatically accelerated by employing the proposed technique","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"25 1","pages":"3841-3844"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83457654","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 : 2006-07-09DOI: 10.1109/APS.2006.1710876
L. Guo, J. Liang, C. Parini, X. Chen
In this paper, the transmitting and receiving characteristics of a printed UWB antenna are studied. A pair of CPW-fed disk monopole antenna was fabricated and the transfer function of antenna system was measured. Based on the transfer function and the reciprocity theorem, transmitting and receiving characteristics of the CPW-fed disk monopole are calculated. Furthermore, radiated pulse is obtained by convolving the input signal with the impulse response of the transmitting antenna
{"title":"Transmitting and receiving characteristics of a CPW-fed disk monopole for UWB applications","authors":"L. Guo, J. Liang, C. Parini, X. Chen","doi":"10.1109/APS.2006.1710876","DOIUrl":"https://doi.org/10.1109/APS.2006.1710876","url":null,"abstract":"In this paper, the transmitting and receiving characteristics of a printed UWB antenna are studied. A pair of CPW-fed disk monopole antenna was fabricated and the transfer function of antenna system was measured. Based on the transfer function and the reciprocity theorem, transmitting and receiving characteristics of the CPW-fed disk monopole are calculated. Furthermore, radiated pulse is obtained by convolving the input signal with the impulse response of the transmitting antenna","PeriodicalId":6423,"journal":{"name":"2006 IEEE Antennas and Propagation Society International Symposium","volume":"385 1","pages":"1647-1650"},"PeriodicalIF":0.0,"publicationDate":"2006-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83466936","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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