Pub Date : 2020-07-05DOI: 10.23919/USNC/URSI49741.2020.9321591
Shahin Sheikh, A. Kishk
In this paper, dual-polarized reflectarray antenna using an interdigitated surface is investigated. It provides high pixel resolution with an acceptable amount of phases states. The benefits and challenges due to the pixel miniaturization are investigated. It has been proposed that the histogram of the phase delay arrangement might be useful to be provided for detecting more priority phase states. Also, pixel clustering is utilized to increase the number of phase states leading to better performance of the antenna.
{"title":"Dual-Polarization Reflectarray Antenna based on Interdigitated Surface","authors":"Shahin Sheikh, A. Kishk","doi":"10.23919/USNC/URSI49741.2020.9321591","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321591","url":null,"abstract":"In this paper, dual-polarized reflectarray antenna using an interdigitated surface is investigated. It provides high pixel resolution with an acceptable amount of phases states. The benefits and challenges due to the pixel miniaturization are investigated. It has been proposed that the histogram of the phase delay arrangement might be useful to be provided for detecting more priority phase states. Also, pixel clustering is utilized to increase the number of phase states leading to better performance of the antenna.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124899441","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 : 2020-07-05DOI: 10.23919/USNC/URSI49741.2020.9321601
A. Nashashibi, M. Kashanianfard, Tanner J. Douglas, K. Sarabandi, Stephen W. Decker
This paper reports on the development of a new fully polarimetric and wideband instrumentation radar operating at a center frequency of 79.6 GHz. This FMCW radar features high angular, range, and Doppler resolutions and supports continuous data acquisition of radar returns from complex traffic scenes. The system is suitable for use in phenomenological studies that support the use of E-band radars for autonomous vehicles and other applications.
{"title":"Fully Polarimetric E-Band Instrumentation Radar in Support of Autonomous Vehicle Research","authors":"A. Nashashibi, M. Kashanianfard, Tanner J. Douglas, K. Sarabandi, Stephen W. Decker","doi":"10.23919/USNC/URSI49741.2020.9321601","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321601","url":null,"abstract":"This paper reports on the development of a new fully polarimetric and wideband instrumentation radar operating at a center frequency of 79.6 GHz. This FMCW radar features high angular, range, and Doppler resolutions and supports continuous data acquisition of radar returns from complex traffic scenes. The system is suitable for use in phenomenological studies that support the use of E-band radars for autonomous vehicles and other applications.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123349448","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 : 2020-07-05DOI: 10.23919/USNC/URSI49741.2020.9321652
S. B. Sayed, A. Yucel, Luis J. Gomez
Electromagnetic (EM) analyses of inhomogeneous scatterers with positive and negative permittivities enable the development and deployment of many emerging technologies. For example, such analyses are necessary for the characterization of exciton-plasmon interactions in the design of composite nanostructures as well as the radar signature characterization of hypersonic re-entry space vehicles engulfed by plasma. When the traditional volume integral equation (VIE) is used for these analyses, it yields an ill-conditioned linear system of equations (LSE); the iterative solution of this ill-conditioned LSE converges very slowly or fails to converge to the desired accuracy. Recently, an internally combined volume-surface integral equation (ICVSIE) technique has been proposed for the EM analyses of inhomogeneous negative permittivity plasma scatterers, which reside in a positive permittivity background medium [1] . This technique yields a well-conditioned LSE by artificially changing the sign of the permittivity of the background medium in which the polarization currents radiate. That said, the standard ICVSIE technique is valid for a scatterer containing only a negative permittivity region; it was not formulated for EM analysis of a scatterer containing both regions of negative and positive permittivity.
{"title":"A Multi-Region Internally Combined Volume Surface Integral Equation for EM Analysis of Inhomogeneous Negative and Positive Permittivity Scatterers","authors":"S. B. Sayed, A. Yucel, Luis J. Gomez","doi":"10.23919/USNC/URSI49741.2020.9321652","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321652","url":null,"abstract":"Electromagnetic (EM) analyses of inhomogeneous scatterers with positive and negative permittivities enable the development and deployment of many emerging technologies. For example, such analyses are necessary for the characterization of exciton-plasmon interactions in the design of composite nanostructures as well as the radar signature characterization of hypersonic re-entry space vehicles engulfed by plasma. When the traditional volume integral equation (VIE) is used for these analyses, it yields an ill-conditioned linear system of equations (LSE); the iterative solution of this ill-conditioned LSE converges very slowly or fails to converge to the desired accuracy. Recently, an internally combined volume-surface integral equation (ICVSIE) technique has been proposed for the EM analyses of inhomogeneous negative permittivity plasma scatterers, which reside in a positive permittivity background medium [1] . This technique yields a well-conditioned LSE by artificially changing the sign of the permittivity of the background medium in which the polarization currents radiate. That said, the standard ICVSIE technique is valid for a scatterer containing only a negative permittivity region; it was not formulated for EM analysis of a scatterer containing both regions of negative and positive permittivity.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123768536","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 : 2020-07-05DOI: 10.23919/USNC/URSI49741.2020.9321670
Panagiota Kontou, S. B. Smida, M. Dragone, S. Nikolaou, Dimitris E. Anagnostou
Radar systems can detect vital signs at a distance by sensing the chest movement, due to heartbeat and respiration. This paper presents an optimized implementation of a continuous wave (CW) radar-based system in order to detect the heartbeat of a person. A main limitation is that dc components added to the received signal, caused by reflections and circuit imperfections, are larger than the ac signal related to chest movement. A novel aspect of this work that mitigates this limitation is that these dc components that are detrimental to heartbeat detection, are automatically reduced to allow for better received signal quality.
{"title":"CW Radar Based System with Automated DC Offset Reduction for Heartbeat Detection","authors":"Panagiota Kontou, S. B. Smida, M. Dragone, S. Nikolaou, Dimitris E. Anagnostou","doi":"10.23919/USNC/URSI49741.2020.9321670","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321670","url":null,"abstract":"Radar systems can detect vital signs at a distance by sensing the chest movement, due to heartbeat and respiration. This paper presents an optimized implementation of a continuous wave (CW) radar-based system in order to detect the heartbeat of a person. A main limitation is that dc components added to the received signal, caused by reflections and circuit imperfections, are larger than the ac signal related to chest movement. A novel aspect of this work that mitigates this limitation is that these dc components that are detrimental to heartbeat detection, are automatically reduced to allow for better received signal quality.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131264505","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 : 2020-07-05DOI: 10.23919/USNC/URSI49741.2020.9321627
Brendon C. Besler, David C. Garrett, Sarah Thorson, E. Fear
A novel system for hydration monitoring using microwaves estimates changes in forearm permittivity to assess hydration status. Previous work with athletes undergoing acute water loss showed promising results. Initial results from volunteers fasting during Ramadan are presented here.
{"title":"Human Hydration Monitoring using Microwaves: System Assessment Using Fasting Volunteers","authors":"Brendon C. Besler, David C. Garrett, Sarah Thorson, E. Fear","doi":"10.23919/USNC/URSI49741.2020.9321627","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321627","url":null,"abstract":"A novel system for hydration monitoring using microwaves estimates changes in forearm permittivity to assess hydration status. Previous work with athletes undergoing acute water loss showed promising results. Initial results from volunteers fasting during Ramadan are presented here.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134059789","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 : 2020-07-05DOI: 10.23919/USNC/URSI49741.2020.9321691
Ning Zhang, Z. Xue, Xiao-fei Wang, Shi-gang Zhou
A conformal "buried in" antenna with omnidirectional property is proposed in this paper. Traditional conformal antennas are always above the carrier and it will affect the fluid mechanics of the carrier. If the antenna can be buried in the carrier, the fluid mechanics characters will be better. The proposed antenna has four parts: the conical metal radiator, the conical backed cavity, the substrate between the radiator and cavity for guiding the wave, and the sleeve structures for wide bandwidth. The antenna radome and the thermal-protective coating layer outside of the carrier are also considered in the design. The simulated results are given, which show that the proposed antenna can cover 1.25 GHz to 2.0 GHz with VSWR<3.0 and the radiation patterns are good over this frequency band.
{"title":"Design of conformal \"buried in\" antenna with Omni-Directional radiation property","authors":"Ning Zhang, Z. Xue, Xiao-fei Wang, Shi-gang Zhou","doi":"10.23919/USNC/URSI49741.2020.9321691","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321691","url":null,"abstract":"A conformal \"buried in\" antenna with omnidirectional property is proposed in this paper. Traditional conformal antennas are always above the carrier and it will affect the fluid mechanics of the carrier. If the antenna can be buried in the carrier, the fluid mechanics characters will be better. The proposed antenna has four parts: the conical metal radiator, the conical backed cavity, the substrate between the radiator and cavity for guiding the wave, and the sleeve structures for wide bandwidth. The antenna radome and the thermal-protective coating layer outside of the carrier are also considered in the design. The simulated results are given, which show that the proposed antenna can cover 1.25 GHz to 2.0 GHz with VSWR<3.0 and the radiation patterns are good over this frequency band.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129420454","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 : 2020-07-05DOI: 10.23919/USNC/URSI49741.2020.9321658
Fang Ye, Yinjie Zhang, Yibing Li, T. Jiang, Yingsong Li
This paper aims to design an appropriate power control policy of the secondary user (SU) to share the spectrum with the primary user without harmful interference. With dynamic spectrum environment, we develop a power control policy based on deep reinforcement learning with Deep Q network (DQN) that the secondary can intelligently adjust his transmit power. And reward function is properly designed to avoid the sparse reward problem which may cause the secondary user cannot adjust to effective power in limited steps and finally fails to transmit. Our experiment result reveals that under the help of the proposed network and reward function, the secondary user can fast and efficiently adjust to effective power from any initial state.
{"title":"Power Control Based on Deep Q Network with Modified Reward Function in Cognitive Networks","authors":"Fang Ye, Yinjie Zhang, Yibing Li, T. Jiang, Yingsong Li","doi":"10.23919/USNC/URSI49741.2020.9321658","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321658","url":null,"abstract":"This paper aims to design an appropriate power control policy of the secondary user (SU) to share the spectrum with the primary user without harmful interference. With dynamic spectrum environment, we develop a power control policy based on deep reinforcement learning with Deep Q network (DQN) that the secondary can intelligently adjust his transmit power. And reward function is properly designed to avoid the sparse reward problem which may cause the secondary user cannot adjust to effective power in limited steps and finally fails to transmit. Our experiment result reveals that under the help of the proposed network and reward function, the secondary user can fast and efficiently adjust to effective power from any initial state.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"405 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132256374","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 : 2020-07-05DOI: 10.23919/USNC/URSI49741.2020.9321674
A. Nashashibi, Tanner J. Douglas, K. Sarabandi, H. Shaman
This paper reports on the design and fabrication of an orthomode transducer operating between 230 GHz and 248 GHz with better than 2 dB insertion loss and 20 dB in cross-polarization isolation.
{"title":"Design and Fabrication of Orthomode Transducer for Compact Polarimetric J-Band Radars","authors":"A. Nashashibi, Tanner J. Douglas, K. Sarabandi, H. Shaman","doi":"10.23919/USNC/URSI49741.2020.9321674","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321674","url":null,"abstract":"This paper reports on the design and fabrication of an orthomode transducer operating between 230 GHz and 248 GHz with better than 2 dB insertion loss and 20 dB in cross-polarization isolation.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128526398","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 : 2020-07-05DOI: 10.23919/USNC/URSI49741.2020.9321667
Lili Guo, Shanya Cong, Chunxia Su, Zhiguo Sun
In this paper, we analyze the downlink performance of non-orthogonal multiple access (NOMA) in ultra-dense networks (UDNs) incorporated into line-of-sight (LOS)/non-line-of- sight (NLOS) propagation.000 Nakagami fading is also considered for the small-scale fading. The expressions for coverage probability (CP) and network throughput are obtained. The numerical results show that the performance of NOMA first increases with the growth of base station (BS) density, and then decreases as the UDNs becomes denser. Moreover, the NOMA still show the superiority with network densification.
{"title":"Achievable NOMA Gain for Downlink Ultra-Dense Small Cell Networks","authors":"Lili Guo, Shanya Cong, Chunxia Su, Zhiguo Sun","doi":"10.23919/USNC/URSI49741.2020.9321667","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321667","url":null,"abstract":"In this paper, we analyze the downlink performance of non-orthogonal multiple access (NOMA) in ultra-dense networks (UDNs) incorporated into line-of-sight (LOS)/non-line-of- sight (NLOS) propagation.000 Nakagami fading is also considered for the small-scale fading. The expressions for coverage probability (CP) and network throughput are obtained. The numerical results show that the performance of NOMA first increases with the growth of base station (BS) density, and then decreases as the UDNs becomes denser. Moreover, the NOMA still show the superiority with network densification.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133709115","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 : 2020-07-05DOI: 10.23919/USNC/URSI49741.2020.9321638
Yibing Li, Xianzhen Meng, Fang Ye, T. Jiang, Yingsong Li
UAVs as mobile nodes have been introduced into wireless sensor network (WSN) to assist information transmission and reduce the burden of communication. To minimize the path cost of UAVs for information transmission, this paper focuses on the path planning of UAVs. A multi-UAVs path planning combined K-means clustering algorithm and improved MAXMIN ant system (MMAS) is proposed. This algorithm apply the K-means clustering algorithm to reduce the problem size and improve the search efficiency of subsequent path planning. By modifying the node search rules and proposing two optimal solution detection rules of the MMAS, the algorithm searching stagnation and failing into local optimal solution are effectively avoided.
{"title":"Path Planning Based on Clustering and Improved ACO in UAV-assisted Wireless Sensor Network","authors":"Yibing Li, Xianzhen Meng, Fang Ye, T. Jiang, Yingsong Li","doi":"10.23919/USNC/URSI49741.2020.9321638","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321638","url":null,"abstract":"UAVs as mobile nodes have been introduced into wireless sensor network (WSN) to assist information transmission and reduce the burden of communication. To minimize the path cost of UAVs for information transmission, this paper focuses on the path planning of UAVs. A multi-UAVs path planning combined K-means clustering algorithm and improved MAXMIN ant system (MMAS) is proposed. This algorithm apply the K-means clustering algorithm to reduce the problem size and improve the search efficiency of subsequent path planning. By modifying the node search rules and proposing two optimal solution detection rules of the MMAS, the algorithm searching stagnation and failing into local optimal solution are effectively avoided.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126075263","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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