Pub Date : 2009-06-01DOI: 10.1109/APS.2009.5171955
C. Mueller, F. Miranda
A quarter-wave microstrip antenna for VHF communication systems has been fabricated and tested. The antenna is physically small, with a metallic ground plane. The antenna gain is +0.6 dBi, and the maximum H-plane cross-polarization levels are 10 dB below the maximum E-plane co-polarization levels. Measurements are performed in an anechoic antenna range designed for higher frequency testing (≫1.5 GHz). The feasibility and limitations of performing VHF antenna tests under these conditions are presented.
{"title":"Quarter-wave VHF microstrip antenna characterized in anechoic chamber","authors":"C. Mueller, F. Miranda","doi":"10.1109/APS.2009.5171955","DOIUrl":"https://doi.org/10.1109/APS.2009.5171955","url":null,"abstract":"A quarter-wave microstrip antenna for VHF communication systems has been fabricated and tested. The antenna is physically small, with a metallic ground plane. The antenna gain is +0.6 dBi, and the maximum H-plane cross-polarization levels are 10 dB below the maximum E-plane co-polarization levels. Measurements are performed in an anechoic antenna range designed for higher frequency testing (≫1.5 GHz). The feasibility and limitations of performing VHF antenna tests under these conditions are presented.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"38 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":"129485413","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.2009.5172018
D. Beke, K. Cools, F. Olyslager, E. Michielssen
Using the proposed preconditioning technique, fast convergence can be obtained. This is illustrated for a simulation of a straight wire. In Fig. 1 the number of iterations needed by the proposed regularized Green function preconditioned EFIE solver is compared with that needed by a Calderon preconditioned [3] and unpreconditioned solver. The number of iterations required by the proposed preconditioner is almost independent of the number of unknowns. The number of iterations needed using the unpreconditioned system, or the Calderòn preconditioned system, is O(N). Similar results apply for wires of other lengths.
{"title":"Preconditioning of wire simulations in the presence of junctions","authors":"D. Beke, K. Cools, F. Olyslager, E. Michielssen","doi":"10.1109/APS.2009.5172018","DOIUrl":"https://doi.org/10.1109/APS.2009.5172018","url":null,"abstract":"Using the proposed preconditioning technique, fast convergence can be obtained. This is illustrated for a simulation of a straight wire. In Fig. 1 the number of iterations needed by the proposed regularized Green function preconditioned EFIE solver is compared with that needed by a Calderon preconditioned [3] and unpreconditioned solver. The number of iterations required by the proposed preconditioner is almost independent of the number of unknowns. The number of iterations needed using the unpreconditioned system, or the Calderòn preconditioned system, is O(N). Similar results apply for wires of other lengths.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"114 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":"129792426","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.2009.5171562
J. Costantine, C. Christodoulou
This paper investigates the redundancy and loss reduction in reconfigurable antenna structures. We use graph models as tools to understand and optimize reconfigurable antenna structures. Examples are given and formulas are suggested to be used by reconfigurable antenna designers to obtain non redundant structures.
{"title":"Analyzing reconfigurable antenna structure redundancy using graph models","authors":"J. Costantine, C. Christodoulou","doi":"10.1109/APS.2009.5171562","DOIUrl":"https://doi.org/10.1109/APS.2009.5171562","url":null,"abstract":"This paper investigates the redundancy and loss reduction in reconfigurable antenna structures. We use graph models as tools to understand and optimize reconfigurable antenna structures. Examples are given and formulas are suggested to be used by reconfigurable antenna designers to obtain non redundant structures.","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":"130415076","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.2009.5171728
N. Takada, T. Shimobaba, N. Masuda, T. Ito
We proposed an FDTD algorithm for GPU with CUDA. Our GPU-FDTD algorithm performed high-speed FDTD simulation using GPU with CUDA, and maintained single-floating point accuracy. In the larger computational domain, the speedup factor becomes worse. The result suggests that the bottleneck of the FDTD simulation is memory bandwidth. Our GPU-FDTD algorithm can be applied to 3-D FDTD simulation. In future, we plan to implement our GPU-FDTD algorithm to the 3-D FDTD simulation.
{"title":"High-speed FDTD simulation algorithm for GPU with compute unified device architecture","authors":"N. Takada, T. Shimobaba, N. Masuda, T. Ito","doi":"10.1109/APS.2009.5171728","DOIUrl":"https://doi.org/10.1109/APS.2009.5171728","url":null,"abstract":"We proposed an FDTD algorithm for GPU with CUDA. Our GPU-FDTD algorithm performed high-speed FDTD simulation using GPU with CUDA, and maintained single-floating point accuracy. In the larger computational domain, the speedup factor becomes worse. The result suggests that the bottleneck of the FDTD simulation is memory bandwidth. Our GPU-FDTD algorithm can be applied to 3-D FDTD simulation. In future, we plan to implement our GPU-FDTD algorithm to the 3-D FDTD simulation.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"419 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":"126703292","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.2009.5171979
A. Petosa, S. Thirakoune
A rectangular dielectric resonator antenna (DRA) with frequency tuning capability has been developed. By introducing a metallic side wall with adjustable shorting tabs, the resonant frequency of a prototype DRA was tuned between 3.2 and 5.8 GHz. This configuration is amenable to dynamic tuning through use of PIN or varactor diodes.
{"title":"Frequency tunable rectangular dielectric resonator antenna","authors":"A. Petosa, S. Thirakoune","doi":"10.1109/APS.2009.5171979","DOIUrl":"https://doi.org/10.1109/APS.2009.5171979","url":null,"abstract":"A rectangular dielectric resonator antenna (DRA) with frequency tuning capability has been developed. By introducing a metallic side wall with adjustable shorting tabs, the resonant frequency of a prototype DRA was tuned between 3.2 and 5.8 GHz. This configuration is amenable to dynamic tuning through use of PIN or varactor diodes.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"38 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":"126791934","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.2009.5171977
A. Abumazwed, A. Sebak
A new DRA has been investigated in this paper. It is a hybrid DRA with a U slot antenna. The antenna is promising for the 5.2/5.8 GHz wireless applications. The antenna has good radiation characteristics over the operating bandwidth which is 30% covering the 5.2/5.8 GHZ wireless application. The average antenna gain is 5dB which is good enough for such an application.
{"title":"Compact DRA for broadband wireless applications","authors":"A. Abumazwed, A. Sebak","doi":"10.1109/APS.2009.5171977","DOIUrl":"https://doi.org/10.1109/APS.2009.5171977","url":null,"abstract":"A new DRA has been investigated in this paper. It is a hybrid DRA with a U slot antenna. The antenna is promising for the 5.2/5.8 GHz wireless applications. The antenna has good radiation characteristics over the operating bandwidth which is 30% covering the 5.2/5.8 GHZ wireless application. The average antenna gain is 5dB which is good enough for such an application.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"10 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":"126819066","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.2009.5171778
M. García-Vigueras, José Luis Gómez‐Tornero, G. Goussetis, D. Canete, F. Quesada, Alejandro Álvarez Melcón
Partially Reflecting Surface (PRS) antennas have attracted considerable interest in recent years due to their ability to conceive high-directivity low-profile broadside 2D antennas with simple configurations [1–3]. On the other hand, 1D leaky-wave antennas (LWA) combining a waveguide and printed circuits have shown the ability to flexibly control the phase velocity and the radiation-rate of the leaky-mode, thus allowing to taper the radiation pattern to obtain different pointing angles, radiation efficiencies and sidelobes distribution [4–5]. In this contribution, we present a novel 1D LWA structure, composed by a parallel-plate waveguide (PPW) loaded with a Frequency Selective Surface (FSS) and an Artificial Magnetic Conductor (AMC), as shown in Fig.1-a. This novel type of 1D LWA provides an interesting mechanism to control the radiation properties of TE leaky-modes. This structure offers a different mechanism to control the leaky-waves from the one proposed in [4–5], and it is extensible to 2D PRS-LWA [1–3]. The top FSS acts as a PRS, controlling with its reflection magnitude the level of the leakage-rate associated to the leaky-mode. On the other hand, the reflection phase of the bottom AMC will determine the pointing angle of the leaky-mode.
{"title":"Leaky-mode dispersion analysis in parallel-plate waveguides loaded with FSS and AMC with application to 1D leaky-wave antennas","authors":"M. García-Vigueras, José Luis Gómez‐Tornero, G. Goussetis, D. Canete, F. Quesada, Alejandro Álvarez Melcón","doi":"10.1109/APS.2009.5171778","DOIUrl":"https://doi.org/10.1109/APS.2009.5171778","url":null,"abstract":"Partially Reflecting Surface (PRS) antennas have attracted considerable interest in recent years due to their ability to conceive high-directivity low-profile broadside 2D antennas with simple configurations [1–3]. On the other hand, 1D leaky-wave antennas (LWA) combining a waveguide and printed circuits have shown the ability to flexibly control the phase velocity and the radiation-rate of the leaky-mode, thus allowing to taper the radiation pattern to obtain different pointing angles, radiation efficiencies and sidelobes distribution [4–5]. In this contribution, we present a novel 1D LWA structure, composed by a parallel-plate waveguide (PPW) loaded with a Frequency Selective Surface (FSS) and an Artificial Magnetic Conductor (AMC), as shown in Fig.1-a. This novel type of 1D LWA provides an interesting mechanism to control the radiation properties of TE leaky-modes. This structure offers a different mechanism to control the leaky-waves from the one proposed in [4–5], and it is extensible to 2D PRS-LWA [1–3]. The top FSS acts as a PRS, controlling with its reflection magnitude the level of the leakage-rate associated to the leaky-mode. On the other hand, the reflection phase of the bottom AMC will determine the pointing angle of the leaky-mode.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"33 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":"130656279","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.2009.5171911
Chung-Huan Li, M. Capstick, E. Neufeld, N. Chavannes, N. Kuster
In this paper, for hyperthermia treatment at head and neck region, the optimized patient positions were proposed for different target regions with the proposed applicator. The simulation results showed that the optimization of the patient positions makes more elements have significant contribution. More important, the applicator with the optimized patient positions provides sufficient exposure to all possible locations of tumor in the patient's neck with good resolution of EM power deposition after the position optimization.
{"title":"Optimization of patient position in hyperthermia treatment for head and neck region","authors":"Chung-Huan Li, M. Capstick, E. Neufeld, N. Chavannes, N. Kuster","doi":"10.1109/APS.2009.5171911","DOIUrl":"https://doi.org/10.1109/APS.2009.5171911","url":null,"abstract":"In this paper, for hyperthermia treatment at head and neck region, the optimized patient positions were proposed for different target regions with the proposed applicator. The simulation results showed that the optimization of the patient positions makes more elements have significant contribution. More important, the applicator with the optimized patient positions provides sufficient exposure to all possible locations of tumor in the patient's neck with good resolution of EM power deposition after the position optimization.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"404 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":"123360949","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.2009.5172045
Q. Rao, Shirook M. Ali, Dong Wang
This paper presents a single feed small size multi-frequency band antenna. The antenna is composed of several folded conducting strips and an L-shaped ground plane. Simulated and measured results show that in addition to a lower frequency band for 700 MHz band wireless applications, the antenna can operate at higher frequency bands of GSM/800/900/1800/1900 and UMTS 2100 and the antenna feature high radiation efficiency with compact size.
{"title":"A multi-band antenna for potential 700 MHz handheld device applications","authors":"Q. Rao, Shirook M. Ali, Dong Wang","doi":"10.1109/APS.2009.5172045","DOIUrl":"https://doi.org/10.1109/APS.2009.5172045","url":null,"abstract":"This paper presents a single feed small size multi-frequency band antenna. The antenna is composed of several folded conducting strips and an L-shaped ground plane. Simulated and measured results show that in addition to a lower frequency band for 700 MHz band wireless applications, the antenna can operate at higher frequency bands of GSM/800/900/1800/1900 and UMTS 2100 and the antenna feature high radiation efficiency with compact size.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"102 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":"123510753","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.2009.5172240
O. Glubokov, D. Budimir
A pseudo-elliptic multilayer substrate integrated cross-coupled filter with two finite transmission zeros based on quasi-ridged resonators was designed using multilayer PCB technology. The filter adjusted for the central frequency of 28 GHz has a bandwidth of 1000 MHz and exhibits good adjacent channel selectivity of 25 dB as well as low insertion and return losses. It has a small size and can be integrated with other filters into diplexers and multiplexers. The approach used in this design can be easily applied for the other multilayer substrates, for example, LTCC.
{"title":"Substrate integrated folded-waveguide cross-coupled filter with negative coupling structure","authors":"O. Glubokov, D. Budimir","doi":"10.1109/APS.2009.5172240","DOIUrl":"https://doi.org/10.1109/APS.2009.5172240","url":null,"abstract":"A pseudo-elliptic multilayer substrate integrated cross-coupled filter with two finite transmission zeros based on quasi-ridged resonators was designed using multilayer PCB technology. The filter adjusted for the central frequency of 28 GHz has a bandwidth of 1000 MHz and exhibits good adjacent channel selectivity of 25 dB as well as low insertion and return losses. It has a small size and can be integrated with other filters into diplexers and multiplexers. The approach used in this design can be easily applied for the other multilayer substrates, for example, LTCC.","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":"123529533","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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