Pub Date : 2017-11-21DOI: 10.1109/APCAP.2017.8420874
Jia-xing Xue, Z. Xie
In this paper, a filtering antenna array with multimode is designed, manufactured and measured. The antenna is based on the co-design of stacked patches and stub-loaded resonators (SLR) to achieve efficient integration, rendering a four-order filtering response. Two radiation nulls respectively at the two edges of the operating band are achieved by controlling the coupling strength between the stacked patches and the stub-loaded resonators, which enhance the out-of-band suppression levels and the skirt selectivity of the filtering antenna.
{"title":"A filtering antenna array based on multimode resonator","authors":"Jia-xing Xue, Z. Xie","doi":"10.1109/APCAP.2017.8420874","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420874","url":null,"abstract":"In this paper, a filtering antenna array with multimode is designed, manufactured and measured. The antenna is based on the co-design of stacked patches and stub-loaded resonators (SLR) to achieve efficient integration, rendering a four-order filtering response. Two radiation nulls respectively at the two edges of the operating band are achieved by controlling the coupling strength between the stacked patches and the stub-loaded resonators, which enhance the out-of-band suppression levels and the skirt selectivity of the filtering antenna.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126144474","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 : 2017-10-16DOI: 10.1109/APCAP.2017.8420936
A. Gelmini, M. Salucci, G. Oliveri, A. Massa
A novel methodology for the robust diagnosis of large planar phased arrays is presented in this work. The developed strategy exploits the inherent sparsity of failures in large arrangements thanks to a customized Bayesian Compressive Sensing (BGS)-based approach. The detection, localization and characterization of faults is accomplished by processing noisy far-field measurements of the antenna under test (AUT) and exploiting the knowledge of the pattern radiated by the gold (error-free) antenna. Some representative numerical results are shown in order to assess the effectiveness of the proposed diagnosis technique, as well as to verify its robustness to noise occurring in real measurements.
{"title":"Robust diagnosis of planar antenna arrays through a Bayesian compressive sensing approach","authors":"A. Gelmini, M. Salucci, G. Oliveri, A. Massa","doi":"10.1109/APCAP.2017.8420936","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420936","url":null,"abstract":"A novel methodology for the robust diagnosis of large planar phased arrays is presented in this work. The developed strategy exploits the inherent sparsity of failures in large arrangements thanks to a customized Bayesian Compressive Sensing (BGS)-based approach. The detection, localization and characterization of faults is accomplished by processing noisy far-field measurements of the antenna under test (AUT) and exploiting the knowledge of the pattern radiated by the gold (error-free) antenna. Some representative numerical results are shown in order to assess the effectiveness of the proposed diagnosis technique, as well as to verify its robustness to noise occurring in real measurements.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127086698","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 : 2017-10-16DOI: 10.1109/APCAP.2017.8420783
N. Anselmi, L. Poli, G. Oliveri, A. Massa
Microwave imaging techniques have been widely developed in the last years, exploiting different inversion strategies in several applicative scenarios. Among these, Compressive Sensing (CS) has been recently introduced in the electromagnetic community as an efficient and effective tool for solving inverse scattering problems. Anyway, despite the sensing problem (i.e. the recovering of the information from the measured data) has been deeply investigated and several solution are nowadays available, the sampling problem is still under development. This work aims at introduce a new paradigm, namely Compressive Processing (CP), in which both the sampling and the sensing problems are jointly addressed.
{"title":"Compressive-processing microwave imaging","authors":"N. Anselmi, L. Poli, G. Oliveri, A. Massa","doi":"10.1109/APCAP.2017.8420783","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420783","url":null,"abstract":"Microwave imaging techniques have been widely developed in the last years, exploiting different inversion strategies in several applicative scenarios. Among these, Compressive Sensing (CS) has been recently introduced in the electromagnetic community as an efficient and effective tool for solving inverse scattering problems. Anyway, despite the sensing problem (i.e. the recovering of the information from the measured data) has been deeply investigated and several solution are nowadays available, the sampling problem is still under development. This work aims at introduce a new paradigm, namely Compressive Processing (CP), in which both the sampling and the sensing problems are jointly addressed.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130972540","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 : 2017-10-16DOI: 10.1109/APCAP.2017.8420784
L. Poli, G. Oliveri, A. Massa
In this paper, an innovate approach which combines a customized sparseness-regularized solver with a multi-scaling procedure for the reconstruction of sparse two-dimensional (2D) dielectric profiles is presented. A customized fast Relevant Vector Machine (RVM), constrained to estimate the sparse unknown coefficients only within a restricted research space defined according to the information progressively acquired during the multi-scaling procedure, is used to solve the inverse problem formulated as a Bayesian Compressive Sensing (BCS) one. Selected numerical results are presented in order to numerically validate the proposed method also in a comparative assessment with the bare approach.
{"title":"Advances in multi-resolution approaches for computational inverse scattering — On the integration of sparse retrieval within the multi-resolution inversion","authors":"L. Poli, G. Oliveri, A. Massa","doi":"10.1109/APCAP.2017.8420784","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420784","url":null,"abstract":"In this paper, an innovate approach which combines a customized sparseness-regularized solver with a multi-scaling procedure for the reconstruction of sparse two-dimensional (2D) dielectric profiles is presented. A customized fast Relevant Vector Machine (RVM), constrained to estimate the sparse unknown coefficients only within a restricted research space defined according to the information progressively acquired during the multi-scaling procedure, is used to solve the inverse problem formulated as a Bayesian Compressive Sensing (BCS) one. Selected numerical results are presented in order to numerically validate the proposed method also in a comparative assessment with the bare approach.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"916 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126978513","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 : 2017-10-16DOI: 10.1109/APCAP.2017.8420941
P. Rocca, A. Massa
This work presents an optimal tiling synthesis methodology for the design of modular phased arrays. Enumerative and optimization-based approaches, based on exact partitioning mathematical theorems and efficient analytic tiling strategies, guarantee a maximal coverage of the array aperture and the optimality of the solution in terms of power pattern performances. A simple example of modular array synthesis is reported, showing the effectiveness of the proposed approach.
{"title":"Exploiting modularity for new generation array architectures — Analytic tiling in array synthesis","authors":"P. Rocca, A. Massa","doi":"10.1109/APCAP.2017.8420941","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420941","url":null,"abstract":"This work presents an optimal tiling synthesis methodology for the design of modular phased arrays. Enumerative and optimization-based approaches, based on exact partitioning mathematical theorems and efficient analytic tiling strategies, guarantee a maximal coverage of the array aperture and the optimality of the solution in terms of power pattern performances. A simple example of modular array synthesis is reported, showing the effectiveness of the proposed approach.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124738526","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 : 2017-10-01DOI: 10.1109/APCAP.2017.8420662
B. Wang, S. L. Fan, L. Wang, W. Dou
Complex permittivity measurements of microwave dielectric materials at high temperatures have always been an important research topic. In this paper, a novel ellipsoidal cavity measurement system operating in 30–40GHz frequency range is designed typically for characterizing low-loss materials at superhigh temperatures up to 1600 °C in air. This system is also applicable to high-loss material measurements by substituting the hole-coupling excitation module with horn-antenna radiators, which is then called ellipsoidal mirror measurement system. Simulation verification is carried out at room temperature and results agree well with theoretical analysis, which confirms the feasibility of the system. Experiments will be carried out later.
{"title":"Study on complex permittivity measurements at super-high temperatures using a novel multi-functional ellipsoidal cavity/mirror","authors":"B. Wang, S. L. Fan, L. Wang, W. Dou","doi":"10.1109/APCAP.2017.8420662","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420662","url":null,"abstract":"Complex permittivity measurements of microwave dielectric materials at high temperatures have always been an important research topic. In this paper, a novel ellipsoidal cavity measurement system operating in 30–40GHz frequency range is designed typically for characterizing low-loss materials at superhigh temperatures up to 1600 °C in air. This system is also applicable to high-loss material measurements by substituting the hole-coupling excitation module with horn-antenna radiators, which is then called ellipsoidal mirror measurement system. Simulation verification is carried out at room temperature and results agree well with theoretical analysis, which confirms the feasibility of the system. Experiments will be carried out later.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115457362","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 : 2017-10-01DOI: 10.1109/APCAP.2017.8420499
R. Hoppe, G. Wölfle, P. Futter, J. Soler
Sophisticated wave propagation models are required for computing the 5G radio coverage as well as for the 5G radio channel analysis. The scenarios of interest range from large rural or suburban areas to dense urban city centers, and even complex indoor scenarios are relevant. For the detailed network planning the overall signal and interference situation needs to be computed. The ray-optical wave propagation models in the WinProp software have been extended to account for the specificities of the 5G frequency bands. Comparisons against various measurement campaigns verify the capability of the WinProp models to correctly predict the propagation characteristics also at mm wave bands.
{"title":"Wave propagation models for 5g radio coverage and channel analysis","authors":"R. Hoppe, G. Wölfle, P. Futter, J. Soler","doi":"10.1109/APCAP.2017.8420499","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420499","url":null,"abstract":"Sophisticated wave propagation models are required for computing the 5G radio coverage as well as for the 5G radio channel analysis. The scenarios of interest range from large rural or suburban areas to dense urban city centers, and even complex indoor scenarios are relevant. For the detailed network planning the overall signal and interference situation needs to be computed. The ray-optical wave propagation models in the WinProp software have been extended to account for the specificities of the 5G frequency bands. Comparisons against various measurement campaigns verify the capability of the WinProp models to correctly predict the propagation characteristics also at mm wave bands.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"355 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115467885","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 : 2017-10-01DOI: 10.1109/APCAP.2017.8420701
Donglin Meng, Liu Xiao, Hong Li, B. Hao
The uncertainty evaluation is made for validating a semi-anechoic chamber with the reference site method evaluation. More uncertainty sources are considered, and the uncertainty value is evaluated accordingly. The details for the uncertainty from the vector network analyzer, from the imperfection of the reference test site, as well as from the radiation pattern are provided in briefly. As for the radiation pattern, some comparison is made between the results with biconical antennas and that with broadband calculable dipole antennas. The uncertainty value is depended on the frequency and the antenna type (directional or omni-directional), as well as on the polarization. The data in this paper are acquired based on careful measurements and precise metrological techniques.
{"title":"Uncertainty of validating semi-anechoic chambers for radiated emmision measurement","authors":"Donglin Meng, Liu Xiao, Hong Li, B. Hao","doi":"10.1109/APCAP.2017.8420701","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420701","url":null,"abstract":"The uncertainty evaluation is made for validating a semi-anechoic chamber with the reference site method evaluation. More uncertainty sources are considered, and the uncertainty value is evaluated accordingly. The details for the uncertainty from the vector network analyzer, from the imperfection of the reference test site, as well as from the radiation pattern are provided in briefly. As for the radiation pattern, some comparison is made between the results with biconical antennas and that with broadband calculable dipole antennas. The uncertainty value is depended on the frequency and the antenna type (directional or omni-directional), as well as on the polarization. The data in this paper are acquired based on careful measurements and precise metrological techniques.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117122918","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 : 2017-10-01DOI: 10.1109/APCAP.2017.8420564
H. Ren, Shiwen Yang, S. Qu
This paper presents a cylindrical luneberg lens antenna with multiple fan-beams at millimeter-wave frequencies. The cylindrical luneberg lens consists of two parallel metal plates, and five layers of dielectrics are filled between the two parallel plates. The thickness and relative permittivity of each layer is optimized. A novel structure consists of several sheet metals is inserted at the edge of the radiation aperture to expand antenna's beamwidth in vertical plane. The lens is fed by an open ridged waveguide. A waveguide to microstrip transition structure is designed. Finally, an optimized cylindrical luneberg lens antenna is obtained with 18.8λ diameter and 0.315λ dielectric height, achieves 15.5dBi simulated gain, 8.5°and 104° half-power beamwidth for horizontal plane and vertical plane at center frequency in the V-band, showing a good antenna performance.
{"title":"Design of a millimeter-wave cylindrical luneberg lens antenna with multiple fan-beams","authors":"H. Ren, Shiwen Yang, S. Qu","doi":"10.1109/APCAP.2017.8420564","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420564","url":null,"abstract":"This paper presents a cylindrical luneberg lens antenna with multiple fan-beams at millimeter-wave frequencies. The cylindrical luneberg lens consists of two parallel metal plates, and five layers of dielectrics are filled between the two parallel plates. The thickness and relative permittivity of each layer is optimized. A novel structure consists of several sheet metals is inserted at the edge of the radiation aperture to expand antenna's beamwidth in vertical plane. The lens is fed by an open ridged waveguide. A waveguide to microstrip transition structure is designed. Finally, an optimized cylindrical luneberg lens antenna is obtained with 18.8λ diameter and 0.315λ dielectric height, achieves 15.5dBi simulated gain, 8.5°and 104° half-power beamwidth for horizontal plane and vertical plane at center frequency in the V-band, showing a good antenna performance.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124863528","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 : 2017-10-01DOI: 10.1109/APCAP.2017.8420448
Xiangdong Wang, Yiming Tang, Bo Li, Kai Li, Hongda Xu
A novel multimode horn loaded with a conical corrugated ring is designed. Simulation results show that the relative bandwidth of the multimode horn is 20% at 5.5GHz∼6.5GHz, with axisymmetric radiation pattern and low sidelobes. The cross-polarization levels are 35dB lower than the co-polarization in E and H plane. The size of the antenna can be reduced 50% comparing with a changing flare angle multimode horn. Because of its short length and a small quantity of corrugated periods, the designed horn can be conveniently to be produced and applied in radar and communication systems.
{"title":"Design of corrugated ring loaded mutimode horn with axisymmetric pattern","authors":"Xiangdong Wang, Yiming Tang, Bo Li, Kai Li, Hongda Xu","doi":"10.1109/APCAP.2017.8420448","DOIUrl":"https://doi.org/10.1109/APCAP.2017.8420448","url":null,"abstract":"A novel multimode horn loaded with a conical corrugated ring is designed. Simulation results show that the relative bandwidth of the multimode horn is 20% at 5.5GHz∼6.5GHz, with axisymmetric radiation pattern and low sidelobes. The cross-polarization levels are 35dB lower than the co-polarization in E and H plane. The size of the antenna can be reduced 50% comparing with a changing flare angle multimode horn. Because of its short length and a small quantity of corrugated periods, the designed horn can be conveniently to be produced and applied in radar and communication systems.","PeriodicalId":367467,"journal":{"name":"2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124981961","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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