Pub Date : 2017-07-09DOI: 10.1109/APUSNCURSINRSM.2017.8072377
I. Yoon, Jungsuek Oh
This paper presents a novel Metasurface exhibiting different beam shaping characteristics according to the polarization of incident waves. The Metasurface is composed of numerous unit cells operating as a spatial phase filter providing different phase shifts depending to the incident polarization. Metallic patterns constituting the unit cell are designed to have different geometry along the two dimensional direction utilizing the proposed design methodologies. It is demonstrated that this structure can have different reactance value depending on the polarized direction of the incident waves. The proposed Metasurface is designed by arranging combinations of the unit cells having passband characteristic but different phase variations as a function of the incident polarization at 28 GHz. Finally, it is demonstrated that for x-polarized waves the proposed Metasurface operates as a convex lens achieving 13 dB gain enhancement while for y-polarized waves the Metasurface operates as frequency selective surface (FSS) just providing passband property without any gain enhancement.
{"title":"Millimeter wave thin metasurface enabling polarization-controlled beam shaping","authors":"I. Yoon, Jungsuek Oh","doi":"10.1109/APUSNCURSINRSM.2017.8072377","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8072377","url":null,"abstract":"This paper presents a novel Metasurface exhibiting different beam shaping characteristics according to the polarization of incident waves. The Metasurface is composed of numerous unit cells operating as a spatial phase filter providing different phase shifts depending to the incident polarization. Metallic patterns constituting the unit cell are designed to have different geometry along the two dimensional direction utilizing the proposed design methodologies. It is demonstrated that this structure can have different reactance value depending on the polarized direction of the incident waves. The proposed Metasurface is designed by arranging combinations of the unit cells having passband characteristic but different phase variations as a function of the incident polarization at 28 GHz. Finally, it is demonstrated that for x-polarized waves the proposed Metasurface operates as a convex lens achieving 13 dB gain enhancement while for y-polarized waves the Metasurface operates as frequency selective surface (FSS) just providing passband property without any gain enhancement.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121648697","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 : 2017-07-09DOI: 10.1109/APUSNCURSINRSM.2017.8073288
Yifeng Qin, D. Werner
This paper proposes a new type of dual-band patch antenna that employs a metamaterial transmission line and two coupled microstrip lines. An equivalent circuit model is presented and analyzed by using multi-conductor transmission line theory. An open ended design is presented for which the radiation pattern of the antenna is omnidirectional/unidirectional in the first and the second frequency bands, respectively.
{"title":"Dual-band omnidirectional/unidirectional patch antenna based on multiconductor transmission line theory","authors":"Yifeng Qin, D. Werner","doi":"10.1109/APUSNCURSINRSM.2017.8073288","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8073288","url":null,"abstract":"This paper proposes a new type of dual-band patch antenna that employs a metamaterial transmission line and two coupled microstrip lines. An equivalent circuit model is presented and analyzed by using multi-conductor transmission line theory. An open ended design is presented for which the radiation pattern of the antenna is omnidirectional/unidirectional in the first and the second frequency bands, respectively.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115766785","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 : 2017-07-09DOI: 10.1109/APUSNCURSINRSM.2017.8073284
K. L. Smith, R. Adams
This paper presents a multiband, electrically small patch antenna with dimensions 147.9 mm by 90.4 mm and an inset microstrip feed. The length of this antenna is suited to a 0.5 GHz resonance. The geometry of the patch has been modified from its traditional form by introduction of five 0.6 mm gaps just inside its outer edge. The effect of these gaps is to reduce the highest frequency of resonance from 500 MHz to 446 MHz, and to introduce three additional resonances, at 353 MHz, 389.5 MHz, and 412.5 MHz.
{"title":"A multiband ringed rectangular patch antenna","authors":"K. L. Smith, R. Adams","doi":"10.1109/APUSNCURSINRSM.2017.8073284","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8073284","url":null,"abstract":"This paper presents a multiband, electrically small patch antenna with dimensions 147.9 mm by 90.4 mm and an inset microstrip feed. The length of this antenna is suited to a 0.5 GHz resonance. The geometry of the patch has been modified from its traditional form by introduction of five 0.6 mm gaps just inside its outer edge. The effect of these gaps is to reduce the highest frequency of resonance from 500 MHz to 446 MHz, and to introduce three additional resonances, at 353 MHz, 389.5 MHz, and 412.5 MHz.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"492 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122580723","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 : 2017-07-09DOI: 10.1109/APUSNCURSINRSM.2017.8072049
L. Harle, Yuxiao He, J. Papapolymerou
A proof of concept 3D printed Yagi-Uda antenna for automotive radar at 77 GHz and 3D printed fabrication plan are presented. The initial design on Connex VeroWhite yields a return loss of 12.7 dB at 73.2 GHz, and 8.7 dBi phi-pol realized gain in the endfire direction, with cross-pol 20 dB down. Two 3D printed fabrication plans are discussed. The fabricated antenna and measured results will be presented at the conference.
{"title":"3D printed 77 GHz Planar Yagi-Uda Antenna","authors":"L. Harle, Yuxiao He, J. Papapolymerou","doi":"10.1109/APUSNCURSINRSM.2017.8072049","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8072049","url":null,"abstract":"A proof of concept 3D printed Yagi-Uda antenna for automotive radar at 77 GHz and 3D printed fabrication plan are presented. The initial design on Connex VeroWhite yields a return loss of 12.7 dB at 73.2 GHz, and 8.7 dBi phi-pol realized gain in the endfire direction, with cross-pol 20 dB down. Two 3D printed fabrication plans are discussed. The fabricated antenna and measured results will be presented at the conference.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129942428","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 : 2017-07-09DOI: 10.1109/APUSNCURSINRSM.2017.8072047
B. Tehrani, S. A. Nauroze, R. Bahr, M. Tentzeris
This work outlines the design, simulation, and fabrication of a millimeter-wave (mm-wave) frequency selective surface (FSS) integrated directly onto a 3D-printed die encapsulation. The cross-shaped slot FSS is designed to function as a bandpass filter centered at 77 GHz for on-package tunability. Stereolithography (SLA) 3D printing is used to fabricate encapsulations for silicon dies attached to a metallic QFN leadframe. Surface profilometry is used to assess the roughness of the SLA-printed surfaces, yielding roughness 25× lower than standard fused deposition modeling (FDM) 3D printing techniques. Finally, inkjet printing is used in a post-process fashion to fabricate the package-integrated FSS directly onto a 3D-printed die encapsulation as a proof-of-concept demonstration.
{"title":"On-package mm-wave FSS integration with 3D-printed encapsulation","authors":"B. Tehrani, S. A. Nauroze, R. Bahr, M. Tentzeris","doi":"10.1109/APUSNCURSINRSM.2017.8072047","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8072047","url":null,"abstract":"This work outlines the design, simulation, and fabrication of a millimeter-wave (mm-wave) frequency selective surface (FSS) integrated directly onto a 3D-printed die encapsulation. The cross-shaped slot FSS is designed to function as a bandpass filter centered at 77 GHz for on-package tunability. Stereolithography (SLA) 3D printing is used to fabricate encapsulations for silicon dies attached to a metallic QFN leadframe. Surface profilometry is used to assess the roughness of the SLA-printed surfaces, yielding roughness 25× lower than standard fused deposition modeling (FDM) 3D printing techniques. Finally, inkjet printing is used in a post-process fashion to fabricate the package-integrated FSS directly onto a 3D-printed die encapsulation as a proof-of-concept demonstration.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126569829","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 : 2017-07-09DOI: 10.1109/APUSNCURSINRSM.2017.8073276
Mehrdad Nosrati, Negar Tavassolian
A low-profile, single-fed, dual-band, linearly/circularly polarized antenna for future 5G networks in the millimeter wave frequency regime is presented. The antenna comprises of two truncated-corner square patches. A cross-slot is etched on the inner patch. It is shown that this cross-slot generates additional resonances and lowers the axial ratio (AR) of the radiating structure. The proposed antenna is fed asymmetrically by a two-section microstrip line. The overall size of the antenna is only 8 mm × 8 mm. The proposed antenna operates at 28 GHz and 38 GHz. The antenna is linearly polarized in the lower band with an impedance bandwidth from 27.55 GHz to 28.15 GHz for |S11| < −10 dB. The antenna is circularly polarized in the upper band with an impedance bandwidth from 37.2 GHz to 38.3 GHz for |S11| < −10 dB and axial ratio (AR) bandwidth from 37.1 GHz to 38.1 GHz for AR < 3 dB. The antenna has a stable radiation pattern and a gain of greater than 6 dBi over both frequency bands.
{"title":"A single feed dual-band, linearly/circularly polarized cross-slot millimeter-wave antenna for future 5G networks","authors":"Mehrdad Nosrati, Negar Tavassolian","doi":"10.1109/APUSNCURSINRSM.2017.8073276","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8073276","url":null,"abstract":"A low-profile, single-fed, dual-band, linearly/circularly polarized antenna for future 5G networks in the millimeter wave frequency regime is presented. The antenna comprises of two truncated-corner square patches. A cross-slot is etched on the inner patch. It is shown that this cross-slot generates additional resonances and lowers the axial ratio (AR) of the radiating structure. The proposed antenna is fed asymmetrically by a two-section microstrip line. The overall size of the antenna is only 8 mm × 8 mm. The proposed antenna operates at 28 GHz and 38 GHz. The antenna is linearly polarized in the lower band with an impedance bandwidth from 27.55 GHz to 28.15 GHz for |S11| < −10 dB. The antenna is circularly polarized in the upper band with an impedance bandwidth from 37.2 GHz to 38.3 GHz for |S11| < −10 dB and axial ratio (AR) bandwidth from 37.1 GHz to 38.1 GHz for AR < 3 dB. The antenna has a stable radiation pattern and a gain of greater than 6 dBi over both frequency bands.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133265353","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 : 2017-07-09DOI: 10.1109/APUSNCURSINRSM.2017.8072053
M. Salucci, Shamim Ahmed, N. Anselmi, G. Oliveri, P. Calmon, R. Miorelli, C. Reboud, A. Massa
This work deals with the real-time non-destructive testing and evaluation (NDT/NDE) of conductive tubes. An innovative learning-by-examples (LBE) strategy is proposed to address the inversion of eddy current testing (ECT) data. The partial least squares (PLS) features extraction technique is combined with an output space filling (OSF) adaptive sampling strategy in order to collect as much as possible information about the input/output (I/O) relationship to model, mitigating the negative effects of the curse of dimensionality. Robust and accurate predictions are then performed by means of support vector regression (SVR). A preliminary numerical validation is shown to prove the effectiveness of the approach.
{"title":"Real-time crack characterization in conductive tubes through an adaptive partial least squares approach","authors":"M. Salucci, Shamim Ahmed, N. Anselmi, G. Oliveri, P. Calmon, R. Miorelli, C. Reboud, A. Massa","doi":"10.1109/APUSNCURSINRSM.2017.8072053","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8072053","url":null,"abstract":"This work deals with the real-time non-destructive testing and evaluation (NDT/NDE) of conductive tubes. An innovative learning-by-examples (LBE) strategy is proposed to address the inversion of eddy current testing (ECT) data. The partial least squares (PLS) features extraction technique is combined with an output space filling (OSF) adaptive sampling strategy in order to collect as much as possible information about the input/output (I/O) relationship to model, mitigating the negative effects of the curse of dimensionality. Robust and accurate predictions are then performed by means of support vector regression (SVR). A preliminary numerical validation is shown to prove the effectiveness of the approach.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"198 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133870331","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 : 2017-07-09DOI: 10.1109/APUSNCURSINRSM.2017.8072096
Mehrdad Nosrati, Negar Tavassolian
A low-profile single-fed, wideband, circularly-polarized slot antenna is proposed. The antenna comprises a square slot fed by a U-shaped microstrip line which provides a wide impedance bandwidth. Wideband circular polarization is obtained by incorporating a metasurface consisting of a 9 × 9 lattice of periodic metal plates. It is shown that this metasurface generates additional resonances, lowers the axial ratio (AR) of the radiating structure, and enhances the radiation pattern stability at higher frequencies. The overall size of the antenna is only 28 mm × 28 mm (0.3 λo × 0.3 λo). The proposed antenna shows an impedance bandwidth from 2.6 GHz to 9 GHz (110.3%) for |S11| > −10 dB, and axial ratio bandwidth from 3.5 GHz to 6.1 GHz (54.1%) for AR > 3 dB. The antenna has a stable radiation pattern and a gain of greater than 3 dBi over the entire frequency band.
提出了一种低轮廓单馈宽带圆极化槽天线。天线包括一个由u形微带线馈电的方槽，该u形微带线提供宽的阻抗带宽。宽带圆极化是通过结合由9 × 9晶格的周期性金属板组成的超表面而获得的。结果表明，该超表面能产生额外的共振，降低辐射结构的轴向比(AR)，提高高频辐射图的稳定性。天线的整体尺寸仅为28 mm × 28 mm (0.3 λo × 0.3 λo)。该天线在S11 > - 10 dB时阻抗带宽为2.6 GHz ~ 9 GHz (110.3%)， AR > 3 dB时轴比带宽为3.5 GHz ~ 6.1 GHz(54.1%)。该天线在整个频段具有稳定的辐射方向图和大于3dbi的增益。
{"title":"A compact circularly-polarized square slot antenna with enhanced axial-ratio bandwidth using metasurface","authors":"Mehrdad Nosrati, Negar Tavassolian","doi":"10.1109/APUSNCURSINRSM.2017.8072096","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8072096","url":null,"abstract":"A low-profile single-fed, wideband, circularly-polarized slot antenna is proposed. The antenna comprises a square slot fed by a U-shaped microstrip line which provides a wide impedance bandwidth. Wideband circular polarization is obtained by incorporating a metasurface consisting of a 9 × 9 lattice of periodic metal plates. It is shown that this metasurface generates additional resonances, lowers the axial ratio (AR) of the radiating structure, and enhances the radiation pattern stability at higher frequencies. The overall size of the antenna is only 28 mm × 28 mm (0.3 λo × 0.3 λo). The proposed antenna shows an impedance bandwidth from 2.6 GHz to 9 GHz (110.3%) for |S11| > −10 dB, and axial ratio bandwidth from 3.5 GHz to 6.1 GHz (54.1%) for AR > 3 dB. The antenna has a stable radiation pattern and a gain of greater than 3 dBi over the entire frequency band.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121425973","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 : 2017-07-09DOI: 10.1109/APUSNCURSINRSM.2017.8072230
A. Haufler, J. Booske, S. Hagness, B. Tilberg, L. Wells-Hansen, R. Serres
We present an experimental and computational study to investigate the feasibility of microwave radar for non-invasively and accurately estimating fruit yields in cranberry beds prior to harvesting and within agricultural research plots. Dielectric measurements of the fruit and leaves show a significant contrast in the 0.5–7.5 GHz range. Full-wave computational electromagnetics simulations of microwave scattering from random distributions of cranberries show a monotonic increase in cross-polarized backscatter signal strength as a function of fractional cranberry volume. The results provide evidence of the potential of microwave reflectometry for accurate and rapid estimation and spatial mapping of cranberry crop yields.
{"title":"Feasibility of efficient and accurate estimation of cranberry crop yield using microwave sensing","authors":"A. Haufler, J. Booske, S. Hagness, B. Tilberg, L. Wells-Hansen, R. Serres","doi":"10.1109/APUSNCURSINRSM.2017.8072230","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8072230","url":null,"abstract":"We present an experimental and computational study to investigate the feasibility of microwave radar for non-invasively and accurately estimating fruit yields in cranberry beds prior to harvesting and within agricultural research plots. Dielectric measurements of the fruit and leaves show a significant contrast in the 0.5–7.5 GHz range. Full-wave computational electromagnetics simulations of microwave scattering from random distributions of cranberries show a monotonic increase in cross-polarized backscatter signal strength as a function of fractional cranberry volume. The results provide evidence of the potential of microwave reflectometry for accurate and rapid estimation and spatial mapping of cranberry crop yields.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130266164","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 : 2017-07-09DOI: 10.1109/APUSNCURSINRSM.2017.8072467
P. Shah, M. Moghaddam
We propose a method to significantly improve the spatial resolution for microwave imaging. Conventional inverse methods for microwave imaging produce images at varying levels of resolution but none of them are at the resolution sufficiently fine to be useful for a complex real-world problem, mainly because of limited availability of independent measurements. We ease the problem by providing additional information through learning. We incorporate learning using a convolutional neural network in the second stage of our proposed two-staged approach, where the first stage is a non-linear inversion approach. Our method can be used with any conventional method and can boost the resolution in all dimensions. The applicability of our method is demonstrated for a 2D microwave imaging problem for an upscale factor of 3. The results show that the proposed method can produce a better detailed higher resolution image.
{"title":"Super resolution for microwave imaging: A deep learning approach","authors":"P. Shah, M. Moghaddam","doi":"10.1109/APUSNCURSINRSM.2017.8072467","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8072467","url":null,"abstract":"We propose a method to significantly improve the spatial resolution for microwave imaging. Conventional inverse methods for microwave imaging produce images at varying levels of resolution but none of them are at the resolution sufficiently fine to be useful for a complex real-world problem, mainly because of limited availability of independent measurements. We ease the problem by providing additional information through learning. We incorporate learning using a convolutional neural network in the second stage of our proposed two-staged approach, where the first stage is a non-linear inversion approach. Our method can be used with any conventional method and can boost the resolution in all dimensions. The applicability of our method is demonstrated for a 2D microwave imaging problem for an upscale factor of 3. The results show that the proposed method can produce a better detailed higher resolution image.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128627274","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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