Pub Date : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861700
Sean M. Ellison, Stavros Vakalis, J. Nanzer
Array optimization to maximize image reconstruction performance is often approached using numerical methods due to the solution space being too large for traditional brute force methods. In this work, a sixteen platform coherent distributed array with a seven element subarray attached to each platform will be optimized in two separate domains, each using a genetic algorithm: one to optimize spatial frequency content and the other to optimize peak to sidelobe level of the point spread function. The dimension of the array solution space is restricted to a planar domain of 50λ × 50λ, and the image reconstruction performance is compared for the outputs of both optimization approaches. It is demonstrated that optimizing the point spread function results in better reconstruction of images containing typical spatial frequency distributions, while optimizing the spatial frequency coverage results in better reconstruction of images containing mostly high-spatial frequency content, such as images consisting mostly of shape outlines.
{"title":"Optimizing for Spatial Frequency Coverage vs. Point-Spread Function Sidelobe Level in Active Incoherent Microwave Imaging Arrays","authors":"Sean M. Ellison, Stavros Vakalis, J. Nanzer","doi":"10.1109/USNC-URSI.2019.8861700","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861700","url":null,"abstract":"Array optimization to maximize image reconstruction performance is often approached using numerical methods due to the solution space being too large for traditional brute force methods. In this work, a sixteen platform coherent distributed array with a seven element subarray attached to each platform will be optimized in two separate domains, each using a genetic algorithm: one to optimize spatial frequency content and the other to optimize peak to sidelobe level of the point spread function. The dimension of the array solution space is restricted to a planar domain of 50λ × 50λ, and the image reconstruction performance is compared for the outputs of both optimization approaches. It is demonstrated that optimizing the point spread function results in better reconstruction of images containing typical spatial frequency distributions, while optimizing the spatial frequency coverage results in better reconstruction of images containing mostly high-spatial frequency content, such as images consisting mostly of shape outlines.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"226 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133423053","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 : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861853
M. Ali, Islam Afifi, A. Sebak
In this paper, the design of a printed RGW crossover for mm-wave beam switching network is proposed. The proposed device can be considered a good candidate in the design of beam switching network as it has a low loss with a wide bandwidth. The simulated results of the proposed crossover show a 13% fractional bandwidth centered at 30 GHz with an impedance matching level less than −20 dB and isolation level less than −15 dB. In addition, the proposed design has an average transmission loss of 0.5 dB over the operating frequency band.
{"title":"Design of Printed RGW Crossover for Millimeter Wave Beam Switching Network","authors":"M. Ali, Islam Afifi, A. Sebak","doi":"10.1109/USNC-URSI.2019.8861853","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861853","url":null,"abstract":"In this paper, the design of a printed RGW crossover for mm-wave beam switching network is proposed. The proposed device can be considered a good candidate in the design of beam switching network as it has a low loss with a wide bandwidth. The simulated results of the proposed crossover show a 13% fractional bandwidth centered at 30 GHz with an impedance matching level less than −20 dB and isolation level less than −15 dB. In addition, the proposed design has an average transmission loss of 0.5 dB over the operating frequency band.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133143419","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 : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861722
J. T. Kelley, C. Courtney, D. A. Chamulak, A. Yılmaz
Recent developments in, and additions to, the Austin RCS Benchmark Suite are described and presented. The benchmark suite has been expanded to include new measurement data to validate simulations for problem set III-A “PEC almonds.” It has also been expanded along the material dimension to problem sets I-B “semiconductor spheres” and I-C “water spheres.”
{"title":"Austin RCS Benchmark Suite Developments","authors":"J. T. Kelley, C. Courtney, D. A. Chamulak, A. Yılmaz","doi":"10.1109/USNC-URSI.2019.8861722","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861722","url":null,"abstract":"Recent developments in, and additions to, the Austin RCS Benchmark Suite are described and presented. The benchmark suite has been expanded to include new measurement data to validate simulations for problem set III-A “PEC almonds.” It has also been expanded along the material dimension to problem sets I-B “semiconductor spheres” and I-C “water spheres.”","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123751120","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 : 2019-07-01DOI: 10.1109/usnc-ursi.2019.8861707
{"title":"USNC-URSI 2019 List Reviewer Page","authors":"","doi":"10.1109/usnc-ursi.2019.8861707","DOIUrl":"https://doi.org/10.1109/usnc-ursi.2019.8861707","url":null,"abstract":"","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123827643","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 : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861713
I. Danjuma, Mobayode O. Akinsolu, B. Mohammad, Eya Eya, R. Abd‐Alhameed, J. Noras, Bo Liu
A compact-size rectangular slot antenna required for ultra-wide band body centric applications is presented. The antenna design is based on etching a rectangular slot on a circular radiator. The antenna geometric design parameters are determined by a state-of-the-art AI-driven antenna design method. Analysis of the proposed antenna was carried out and its performance assessed in terms of bandwidth, gain, efficiency, and radiation pattern. Results investigated show that the rectangular slot antenna maintains its bandwidth when placed in closed contact with the human body phantom. The very close agreement between the simulated and measured results both in free space and on body indicates that the antenna performance is immune to variation in the presence of human body phantom and robust to fabrication tolerances.
{"title":"A Compact Size and Low Profile Rectangular Slot Monopole Antenna for UWB Body Centric Applications","authors":"I. Danjuma, Mobayode O. Akinsolu, B. Mohammad, Eya Eya, R. Abd‐Alhameed, J. Noras, Bo Liu","doi":"10.1109/USNC-URSI.2019.8861713","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861713","url":null,"abstract":"A compact-size rectangular slot antenna required for ultra-wide band body centric applications is presented. The antenna design is based on etching a rectangular slot on a circular radiator. The antenna geometric design parameters are determined by a state-of-the-art AI-driven antenna design method. Analysis of the proposed antenna was carried out and its performance assessed in terms of bandwidth, gain, efficiency, and radiation pattern. Results investigated show that the rectangular slot antenna maintains its bandwidth when placed in closed contact with the human body phantom. The very close agreement between the simulated and measured results both in free space and on body indicates that the antenna performance is immune to variation in the presence of human body phantom and robust to fabrication tolerances.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125406539","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 : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861832
Saeed M. Khan
Wireless power transfer (WPT) schemes need to be both efficient and practical. When the receiver is hovering close to the charging region the alignment requirements for high efficiency should not be so stringent that a practical system cannot be built. Experimental results for the basic scheme show that when two identical helical antennas are placed on opposite sides of a ground plane strong coupling is possible in the near field when the axes of the antennas are aligned. Starting with these experimental findings this paper explores, through simulation and analysis, a range of important variations of the basic scheme that allow efficient and practical power transfer.
{"title":"Practical Considerations for Resonant Near Field Wireless Power Transfer over Common Ground","authors":"Saeed M. Khan","doi":"10.1109/USNC-URSI.2019.8861832","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861832","url":null,"abstract":"Wireless power transfer (WPT) schemes need to be both efficient and practical. When the receiver is hovering close to the charging region the alignment requirements for high efficiency should not be so stringent that a practical system cannot be built. Experimental results for the basic scheme show that when two identical helical antennas are placed on opposite sides of a ground plane strong coupling is possible in the near field when the axes of the antennas are aligned. Starting with these experimental findings this paper explores, through simulation and analysis, a range of important variations of the basic scheme that allow efficient and practical power transfer.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"2008 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125980626","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 : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861704
G. Awadhwal, S. Rengarajan
In this paper, a CPW fed slotted patch antenna is proposed for Ultra Wide Band (UWB) applications. A frequency domain analysis of the antenna is used to optimize the feed line, ground plane and slotted patch to realize the antenna performance for UWB purposes. The return loss is found to be better than 10 dB over a bandwidth of 2.95GHz to 10.65GHz which is the UWB band allocated by FCC. In this paper, the simulated return loss and radiation pattern are presented.
{"title":"CPW Fed Slotted Patch Antenna for UWB Applications","authors":"G. Awadhwal, S. Rengarajan","doi":"10.1109/USNC-URSI.2019.8861704","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861704","url":null,"abstract":"In this paper, a CPW fed slotted patch antenna is proposed for Ultra Wide Band (UWB) applications. A frequency domain analysis of the antenna is used to optimize the feed line, ground plane and slotted patch to realize the antenna performance for UWB purposes. The return loss is found to be better than 10 dB over a bandwidth of 2.95GHz to 10.65GHz which is the UWB band allocated by FCC. In this paper, the simulated return loss and radiation pattern are presented.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130209397","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 : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861940
Zachary K. Burchfield, T. Hanley, E. Miller, H. Kil, David A. Drzewiecki, Kirk A. Shawhan, A. N. Riel
This paper details Johns Hopkins University Applied Physics Laboratory’s (JHU/APL) participation in the Office of Naval Research’s (ONR) 2018 Stratified Ocean Dynamics of the Arctic (SODA) campaign emphasizing characterization of the RF propagation environment. Several sources of data were collected including meteorological data and RF signals of opportunity. Apart from observing long range HF signals via expected ionospheric reflection, instances of anomalous tropospheric RF propagation were also observed on several occasions during a month-long underway, along with meteorological data collected to help model the phenomena.
{"title":"RF Propagation Characterization in the Arctic : Measurements from JHU/APL participation in 2018 SODA campaign","authors":"Zachary K. Burchfield, T. Hanley, E. Miller, H. Kil, David A. Drzewiecki, Kirk A. Shawhan, A. N. Riel","doi":"10.1109/USNC-URSI.2019.8861940","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861940","url":null,"abstract":"This paper details Johns Hopkins University Applied Physics Laboratory’s (JHU/APL) participation in the Office of Naval Research’s (ONR) 2018 Stratified Ocean Dynamics of the Arctic (SODA) campaign emphasizing characterization of the RF propagation environment. Several sources of data were collected including meteorological data and RF signals of opportunity. Apart from observing long range HF signals via expected ionospheric reflection, instances of anomalous tropospheric RF propagation were also observed on several occasions during a month-long underway, along with meteorological data collected to help model the phenomena.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129425245","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 : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861793
K. Poudel, Madhav Pant
Wireless power transfer has enhanced its capability and been able to suit itself for various applications with pace of time. This paper presents modern wireless power transfer methods in medical implants design that can possibly overcome the traditional battery operated implants. Various advantages of far field inductive power transfer is pointed and the way to model the implants inside the human body is clearly illustrated. The modelling of maximum power utilization by the implant inside the human body is demonstrated using the equivalent cylinder layers properties. Advanced Design System, a automation software for RF, microwave is used to match the source and load impedance, Simplorer to calculate the voltage utilized by the implant and ANSYS HFSS to model implant in real environment is used to simulate overall project design. This designed implant can drive the implant consuming power up-to 0.1135 mW. The qualitative design and analysis of such implant could also be used on other medical applications considering ICNIRP criteria.
{"title":"Wireless Power Transfer for Medical Implants","authors":"K. Poudel, Madhav Pant","doi":"10.1109/USNC-URSI.2019.8861793","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861793","url":null,"abstract":"Wireless power transfer has enhanced its capability and been able to suit itself for various applications with pace of time. This paper presents modern wireless power transfer methods in medical implants design that can possibly overcome the traditional battery operated implants. Various advantages of far field inductive power transfer is pointed and the way to model the implants inside the human body is clearly illustrated. The modelling of maximum power utilization by the implant inside the human body is demonstrated using the equivalent cylinder layers properties. Advanced Design System, a automation software for RF, microwave is used to match the source and load impedance, Simplorer to calculate the voltage utilized by the implant and ANSYS HFSS to model implant in real environment is used to simulate overall project design. This designed implant can drive the implant consuming power up-to 0.1135 mW. The qualitative design and analysis of such implant could also be used on other medical applications considering ICNIRP criteria.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124515868","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 : 2019-07-01DOI: 10.1109/USNC-URSI.2019.8861742
R. Jaiswal, Nidhi Pandit, N. Pathak
This paper reports the design and theoretical analysis of the spoof plasmonic metamaterial based multi-band band-pass filter (BPF) using corrugated planar micro-ring resonator at THz frequency. Plasmonic metamaterial i.e. spoof surface plasmon polaritons structures support EM mode at the interface of the metal-dielectric and thus highly confined and localized E-field can be obtained. Due to this sub-wavelength field confinement, spoof SPP structures show low-loss, low crosstalk and low mutual coupling and is being used for developing the compact integrated circuits. Sub-wavelength rectangular grooves are corrugated on the metallic planar ring is fed through the spoof SPP transmission line at its input and output ports to provide a band-pass response. The detailed mathematical analysis is provided for the designed band-pass filter. The Full wave EM simulation is performed to obtain the reflection and transmission coefficient. The designed spoof plasmonic ring resonator will provide a path to design and development of the plasmonic sensors.
{"title":"Terahertz Plasmonic Metamaterial Based Multi-band Band-Pass Filter Using Micro-Ring Resonator","authors":"R. Jaiswal, Nidhi Pandit, N. Pathak","doi":"10.1109/USNC-URSI.2019.8861742","DOIUrl":"https://doi.org/10.1109/USNC-URSI.2019.8861742","url":null,"abstract":"This paper reports the design and theoretical analysis of the spoof plasmonic metamaterial based multi-band band-pass filter (BPF) using corrugated planar micro-ring resonator at THz frequency. Plasmonic metamaterial i.e. spoof surface plasmon polaritons structures support EM mode at the interface of the metal-dielectric and thus highly confined and localized E-field can be obtained. Due to this sub-wavelength field confinement, spoof SPP structures show low-loss, low crosstalk and low mutual coupling and is being used for developing the compact integrated circuits. Sub-wavelength rectangular grooves are corrugated on the metallic planar ring is fed through the spoof SPP transmission line at its input and output ports to provide a band-pass response. The detailed mathematical analysis is provided for the designed band-pass filter. The Full wave EM simulation is performed to obtain the reflection and transmission coefficient. The designed spoof plasmonic ring resonator will provide a path to design and development of the plasmonic sensors.","PeriodicalId":383603,"journal":{"name":"2019 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122813064","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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