Pub Date : 2014-12-01DOI: 10.1109/ISANP.2014.7026684
S. Makino, H. Hayashi, T. Moroya, K. Itoh, K. Noguchi, T. Hirota
This paper provides the dual band characteristics of the capacitance grid type AMC substrate and shows that the substrate works as AMC substrate at the dual bands separated three times.
本文给出了电容网格型AMC基板的双频特性，并表明该基板在三次分离的双频处作为AMC基板工作。
{"title":"Dual band characteristics of a linear antenna over a capacitance grid type AMC substrate","authors":"S. Makino, H. Hayashi, T. Moroya, K. Itoh, K. Noguchi, T. Hirota","doi":"10.1109/ISANP.2014.7026684","DOIUrl":"https://doi.org/10.1109/ISANP.2014.7026684","url":null,"abstract":"This paper provides the dual band characteristics of the capacitance grid type AMC substrate and shows that the substrate works as AMC substrate at the dual bands separated three times.","PeriodicalId":286017,"journal":{"name":"2014 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126466299","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 : 2014-09-22DOI: 10.1109/APWC.2014.6905586
D. Jackson, P. Burghignoli, G. Lovat, F. Capolino
The role of leaky waves in explaining the operation of Fabry-Pérot resonant cavity antennas is discussed. Leaky-wave theory allows for the design of such structure to achieve the optimum beam at broadside. Simple formulas for the relevant properties of the antennas such as the beamwidth and bandwidth are also given.
{"title":"The role of leaky waves in Fabry-Pérot resonant cavity antennas","authors":"D. Jackson, P. Burghignoli, G. Lovat, F. Capolino","doi":"10.1109/APWC.2014.6905586","DOIUrl":"https://doi.org/10.1109/APWC.2014.6905586","url":null,"abstract":"The role of leaky waves in explaining the operation of Fabry-Pérot resonant cavity antennas is discussed. Leaky-wave theory allows for the design of such structure to achieve the optimum beam at broadside. Simple formulas for the relevant properties of the antennas such as the beamwidth and bandwidth are also given.","PeriodicalId":286017,"journal":{"name":"2014 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114631092","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 : 2014-09-22DOI: 10.1109/APWC.2014.6905537
K. Kagoshima, S. Takeda, K. Itou
Beam port and multiplexing radiation efficiencies of a multi-beam antenna employing a decoupling and matching feeding network was investigated. The multiplexing efficiency is useful to evaluate the band width characteristics of the multi-beam antenna for MIMO applications. Excitation coefficients of the multi-beam antenna was also studied to consider the relation to the bandwidth characteristics of the radiation efficiency.
{"title":"Array excitation coefficients of a compact multi-beam antenna for MIMO applications","authors":"K. Kagoshima, S. Takeda, K. Itou","doi":"10.1109/APWC.2014.6905537","DOIUrl":"https://doi.org/10.1109/APWC.2014.6905537","url":null,"abstract":"Beam port and multiplexing radiation efficiencies of a multi-beam antenna employing a decoupling and matching feeding network was investigated. The multiplexing efficiency is useful to evaluate the band width characteristics of the multi-beam antenna for MIMO applications. Excitation coefficients of the multi-beam antenna was also studied to consider the relation to the bandwidth characteristics of the radiation efficiency.","PeriodicalId":286017,"journal":{"name":"2014 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125470037","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 : 2014-09-22DOI: 10.1109/APWC.2014.6905564
M. N. Abdallah, W. Dyab, T. Sarkar, M. Prasad, C. Misra, A. Lamparez, M. Salazar-Palma
Received signal level measurements are frequently used to check the performance and the Quality of Service (QOS) coverage area in cellular networks. These expensive time consuming measurements are carried out using an actual drive tests to assess the coverage area of a base station for a given cell and thus evaluate the QOS. In this paper, the novelty of the proposed electromagnetic analysis technique lies in its ability to match the macro model based simulation and measurement results without any statistical or empirical curve fitting or an adhoc choice of a reference distance. Furthermore, a new concept called proper route has been introduced to enhance the quality of measured data. The input parameters for the electromagnetic macro model can be generated using only the physical parameters of the environment like the height of the transmitting and receiving antennas over the ground, their tilts toward the ground, and the electrical parameters of the ground. A method of moments-based integral equation solver code called AWAS has been used to simulate the effects of the macro parameters of the environment. Measurements were carried out for cellular networks in western India and Srilanka.
{"title":"Further validation of an electromagnetic macro model for analysis of propagation path loss in cellular networks using measured drive test data","authors":"M. N. Abdallah, W. Dyab, T. Sarkar, M. Prasad, C. Misra, A. Lamparez, M. Salazar-Palma","doi":"10.1109/APWC.2014.6905564","DOIUrl":"https://doi.org/10.1109/APWC.2014.6905564","url":null,"abstract":"Received signal level measurements are frequently used to check the performance and the Quality of Service (QOS) coverage area in cellular networks. These expensive time consuming measurements are carried out using an actual drive tests to assess the coverage area of a base station for a given cell and thus evaluate the QOS. In this paper, the novelty of the proposed electromagnetic analysis technique lies in its ability to match the macro model based simulation and measurement results without any statistical or empirical curve fitting or an adhoc choice of a reference distance. Furthermore, a new concept called proper route has been introduced to enhance the quality of measured data. The input parameters for the electromagnetic macro model can be generated using only the physical parameters of the environment like the height of the transmitting and receiving antennas over the ground, their tilts toward the ground, and the electrical parameters of the ground. A method of moments-based integral equation solver code called AWAS has been used to simulate the effects of the macro parameters of the environment. Measurements were carried out for cellular networks in western India and Srilanka.","PeriodicalId":286017,"journal":{"name":"2014 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"185 20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132122336","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 : 2014-09-22DOI: 10.1109/APWC.2014.6905576
D. Karmokar, K. Esselle, S. Hay
This paper presents a slot-loaded half-width microstrip leaky-wave antenna (MLWA) for fixed-frequency beam scanning. Digital switches are used in the design for controlling the beam direction at a fixed-frequency. Dynamically changing the `On' and `Off' states of the switches, the main beam of the antenna is steered in discrete steps. Addition of slots in the microstrip line results in shifting of the scanning range away from broadside. Operation of the antenna is demonstrated for selected frequencies. This research demonstrates the ability to steer the main beam from 23° to 60° at 6.5 GHz and 46° to 70° at 7 GHz, in discrete steps.
{"title":"Shifting the fixed-frequency beam scanning range of a leaky-wave antenna by slot loading","authors":"D. Karmokar, K. Esselle, S. Hay","doi":"10.1109/APWC.2014.6905576","DOIUrl":"https://doi.org/10.1109/APWC.2014.6905576","url":null,"abstract":"This paper presents a slot-loaded half-width microstrip leaky-wave antenna (MLWA) for fixed-frequency beam scanning. Digital switches are used in the design for controlling the beam direction at a fixed-frequency. Dynamically changing the `On' and `Off' states of the switches, the main beam of the antenna is steered in discrete steps. Addition of slots in the microstrip line results in shifting of the scanning range away from broadside. Operation of the antenna is demonstrated for selected frequencies. This research demonstrates the ability to steer the main beam from 23° to 60° at 6.5 GHz and 46° to 70° at 7 GHz, in discrete steps.","PeriodicalId":286017,"journal":{"name":"2014 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133463372","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 : 2014-09-22DOI: 10.1109/APWC.2014.6905550
W. Schroeder, M. Bouezzeddine, A. Krewski
An overview of design goals and approaches to the design of MIMO antennas for mobile terminals is presented. Figures of Merit (FOMs) for multiport antennas are derived based on consideration of transmit mode and receive mode for the Downlink - Transmit Diversity scheme and the Closed-loop Spatial Multiplexing (CL-SM) scheme of LTE. Total multiport efficiency and imbalance figure are identified as the most relevant FOMs. A systematic design approach by which the radiation modes of a multiport antenna are derived from the characteristic modes of the device's chassis are presented. Some aspects of this approach are illustrated by example.
{"title":"Design approaches for electrically small MIMO antenna systems on mobile devices","authors":"W. Schroeder, M. Bouezzeddine, A. Krewski","doi":"10.1109/APWC.2014.6905550","DOIUrl":"https://doi.org/10.1109/APWC.2014.6905550","url":null,"abstract":"An overview of design goals and approaches to the design of MIMO antennas for mobile terminals is presented. Figures of Merit (FOMs) for multiport antennas are derived based on consideration of transmit mode and receive mode for the Downlink - Transmit Diversity scheme and the Closed-loop Spatial Multiplexing (CL-SM) scheme of LTE. Total multiport efficiency and imbalance figure are identified as the most relevant FOMs. A systematic design approach by which the radiation modes of a multiport antenna are derived from the characteristic modes of the device's chassis are presented. Some aspects of this approach are illustrated by example.","PeriodicalId":286017,"journal":{"name":"2014 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"227 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121864559","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 : 2014-09-22DOI: 10.1109/APWC.2014.6905588
C. Karlsson, P. Cavero, T. Tekin, D. Pouhè
This paper presents a new broadband antenna for satellite communications. It describes the procedure involved in the design of a microstrip antenna array and its multi-level passive feed network that together yield circular polarization and the necessary gain to be used in an earth-satellite link. The designed antenna is notable for its large bandwidth, circular polarization, high gain and small dimensions.
{"title":"A new broadband antenna for satellite communications","authors":"C. Karlsson, P. Cavero, T. Tekin, D. Pouhè","doi":"10.1109/APWC.2014.6905588","DOIUrl":"https://doi.org/10.1109/APWC.2014.6905588","url":null,"abstract":"This paper presents a new broadband antenna for satellite communications. It describes the procedure involved in the design of a microstrip antenna array and its multi-level passive feed network that together yield circular polarization and the necessary gain to be used in an earth-satellite link. The designed antenna is notable for its large bandwidth, circular polarization, high gain and small dimensions.","PeriodicalId":286017,"journal":{"name":"2014 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128559288","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 : 2014-09-22DOI: 10.1109/APWC.2014.6905524
J. Schaffner, A. Bekaryan, Hyok J. Song, T. Talty, Duane S. Carper, E. Yasan, A. Duzdar
This paper presents the use of a commercially available radio scanner for characterizing on-vehicle 2×2 Long-Term Evolution (LTE) radio Multiple-Input Multiple-Output (MIMO) antennas. The scanner measures the LTE eNodeB, i.e. the cell base station, reference signals and each channel and determines the MIMO channel matrices from which the downlink throughput can be determined. For a given LTE radio, this measurement approach can be very useful for efficient comparison between MIMO antennas or among different antenna locations on the vehicle.
{"title":"A drive test measurement approach to characterize on-vehicle 2×2 LTE-MIMO antennas","authors":"J. Schaffner, A. Bekaryan, Hyok J. Song, T. Talty, Duane S. Carper, E. Yasan, A. Duzdar","doi":"10.1109/APWC.2014.6905524","DOIUrl":"https://doi.org/10.1109/APWC.2014.6905524","url":null,"abstract":"This paper presents the use of a commercially available radio scanner for characterizing on-vehicle 2×2 Long-Term Evolution (LTE) radio Multiple-Input Multiple-Output (MIMO) antennas. The scanner measures the LTE eNodeB, i.e. the cell base station, reference signals and each channel and determines the MIMO channel matrices from which the downlink throughput can be determined. For a given LTE radio, this measurement approach can be very useful for efficient comparison between MIMO antennas or among different antenna locations on the vehicle.","PeriodicalId":286017,"journal":{"name":"2014 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116878704","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 : 2014-09-22DOI: 10.1109/APWC.2014.6905587
V. Pham-Xuan, I. Kavanagh, M. Condon, C. Brennan
Two integral equation formulations for the analysis of two-dimensional indoor EM wave propagation are discussed in this paper. The volume and the surface electric fleld integral equations are discretised by the Method of Moments, resulting in dense linear systems whose iterative solutions are accelerated by using acceleration techniques. Numerical results are presented to compare the performance of the two approaches when applied to the same indoor propagation problem.
{"title":"On comparison of integral equation approaches for indoor wave propagation","authors":"V. Pham-Xuan, I. Kavanagh, M. Condon, C. Brennan","doi":"10.1109/APWC.2014.6905587","DOIUrl":"https://doi.org/10.1109/APWC.2014.6905587","url":null,"abstract":"Two integral equation formulations for the analysis of two-dimensional indoor EM wave propagation are discussed in this paper. The volume and the surface electric fleld integral equations are discretised by the Method of Moments, resulting in dense linear systems whose iterative solutions are accelerated by using acceleration techniques. Numerical results are presented to compare the performance of the two approaches when applied to the same indoor propagation problem.","PeriodicalId":286017,"journal":{"name":"2014 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116249311","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 : 2014-09-22DOI: 10.1109/APWC.2014.6905559
M. Tanabe, Y. Oishi, Y. Masuda
Radiation characteristics of a wide-band dipole antenna over an electromagnetic band-gap (EBG) reflector are investigated. The mushroom-like EBG structure is used as the EBG reflector. The analysis is performed using Method of Moment. It is shown that wideband characteristics of the voltage standing wave ratio (VSWR) are obtained. However, good radiation patterns in the wide frequency range are not always obtained even though the wideband EBG reflector is used. Subsequently, the radiation mechanism is analyzed. The analysis results show that the shape of the radiation pattern depends on the dimension of the EBG patch.
{"title":"Radiation characteristics of a wide-band dipole antenna over an electromagnetic band-gap reflector","authors":"M. Tanabe, Y. Oishi, Y. Masuda","doi":"10.1109/APWC.2014.6905559","DOIUrl":"https://doi.org/10.1109/APWC.2014.6905559","url":null,"abstract":"Radiation characteristics of a wide-band dipole antenna over an electromagnetic band-gap (EBG) reflector are investigated. The mushroom-like EBG structure is used as the EBG reflector. The analysis is performed using Method of Moment. It is shown that wideband characteristics of the voltage standing wave ratio (VSWR) are obtained. However, good radiation patterns in the wide frequency range are not always obtained even though the wideband EBG reflector is used. Subsequently, the radiation mechanism is analyzed. The analysis results show that the shape of the radiation pattern depends on the dimension of the EBG patch.","PeriodicalId":286017,"journal":{"name":"2014 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)","volume":"518 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123258366","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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