IEEE Open Journal of Antennas and Propagation最新文献

{"title":"On the Radiation of Curved Beams in the Near-Field by Distributed Caustics for NLOS Applications","authors":"Federica Anfuso;Ahsan Ullah Khan;Gino Sorbello;Santi Concetto Pavone","doi":"10.1109/OJAP.2025.3626778","DOIUrl":"https://doi.org/10.1109/OJAP.2025.3626778","url":null,"abstract":"This paper introduces a novel method for synthesizing focused and curved electromagnetic beams in the near-field region, targeting high-frequency applications in the microwave and millimeter-wave domains. The approach leverages ray–caustic theory, which models beam propagation using high-frequency ray approximations, where caustics can be interpreted as geometrical loci of localized field enhancement caused by the envelope of rays. By defining the desired beam trajectory through a target caustic curve, the method enables spatial control of the field distribution along arbitrarily shaped paths. In contrast to other more conventional techniques based on non-diffractive beams, the proposed method offers enhanced flexibility in beam trajectory shaping, making it suitable for applications that require strong field confinement and accurate beam steering in the near field. These include short-range wireless power transfer, chip-to-chip communications, and near-field imaging. The effectiveness of the technique is proven by a simple analytical model, validated through full-wave simulations by CST Microwave Studio. Moreover, a realistic implementation of curved beam launchers is presented, based on a slot array in a parallel-plate waveguide. The results confirm the method ability to radiate near-field beams that closely follow the designed spatial trajectories, thus opening new potential applications for advanced near-field control in high-frequency systems.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"7 3","pages":"1104-1116"},"PeriodicalIF":3.6,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11222690","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148214907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-Gain, Compact UWB Antenna for Wireless Power Transfer-Based Wearable Applications","authors":"Karthik Kakaraparty;Ifana Mahbub","doi":"10.1109/OJAP.2024.3520069","DOIUrl":"https://doi.org/10.1109/OJAP.2024.3520069","url":null,"abstract":"The advancement of wearable ultra-wideband (UWB) antennas for wireless power transmission (WPT) requires a compact antenna design with high gain and wide bandwidth capability. A wearable UWB antenna is fabricated that is intended for wireless power transfer applications. A comparative analysis is presented with respect to the fabricated antenna’s gain, bandwidth, and power transfer capability with the antenna in the air and when placed on the human skeletal muscle tissue phantom. The fabricated UWB antenna has a resonating frequency of 3.11 GHz. The designed UWB antenna has realized a gain of 6.35 dBi with fractional bandwidth (FBW) of 69.93%. The measured nearfield <inline-formula> <tex-math>$S_{21}$ </tex-math></inline-formula> parameter portrayed a maximum power transfer efficiency (PTE) efficiency of 66.3% for a <inline-formula> <tex-math>$0.3lambda $ </tex-math></inline-formula> transfer distance along with the estimated specific absorption rate (SAR) value of 0.794 W/kg when averaged over 10 g tissue and 1.02 W/kg when averaged over 1 g tissue portrays that the proposed design is safe and suitable for wearable applications.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"7 3","pages":"1117-1128"},"PeriodicalIF":3.6,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10806827","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148214863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"2D Adaptive Beam Pointing and Tracking Using Electronically Reconfigurable Reflectarray Antennas for Troposcatter Communication Systems","authors":"Jiahao Zhao;Halil Topözlü;Melisa Bozdemir;Tianqi Shen;Tyler Tai-Ho Chen;John H. Booske;Nader Behdad","doi":"10.1109/OJAP.2026.3681721","DOIUrl":"https://doi.org/10.1109/OJAP.2026.3681721","url":null,"abstract":"We present an adaptive beam pointing and tracking system based on an electronically reconfigurable reflectarray antenna (ERRA) with 2-bit phase quantization, developed for potential use in troposcatter communications applications. The system addresses the challenges of beam pointing and tracking in dynamic environments—where platform movements, vibrations, and tropospheric effects can rapidly degrade link quality—by enabling fast, electronically controlled steering of the beam without mechanical movement. The system integrates 2-bit quantized phase control of each individual element of the ERRA with real-time feedback to achieve precise beam pointing and tracking over a wide angular range of up to ±60° in both azimuth and elevation planes. Two tracking algorithms—monopulse-like and conical tracking—were implemented, characterized, and compared using the same system. We experimentally validated the operation of the proposed system at 5.9 GHz by tracking a beacon carried by a drone. Two sets of experiments, including a static accuracy test and a dynamic tracking test, were conducted to quantitatively evaluate the two algorithms. In the former, the drone hovered at multiple programmed positions, evenly covering ±60° azimuth and 0-60° elevation angles, and 100 tracking samples were collected at each position to calculate the RMS Euclidean error. In the dynamic test, the drone was flown along a preselected trajectory while the system continuously tracked the moving target. Our experimental results demonstrate that the monopulse-like tracking algorithm outperforms the conical scan algorithm in this system.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"7 3","pages":"1018-1028"},"PeriodicalIF":3.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11494050","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148513330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reflectarray 2-D Beam-Steering With Graphene on Copper Elements for 6G Point-to-Point Communication","authors":"Suhail Asghar Qureshi;Muhammad Ramlee Kamarudin;Yoshihide Yamada;Muhammad Inam Abbasi;Muhammad Hashim Dahri;Zuhairiah Zainal Abidin;Nordin Ramli","doi":"10.1109/OJAP.2024.3505424","DOIUrl":"https://doi.org/10.1109/OJAP.2024.3505424","url":null,"abstract":"This work presents a graphene-based Reconfigurable Reflectarray Antenna (RRA) for 6G point-to-point communications. Unlike the conventional dimensions of less than <inline-formula> <tex-math>$lambda $ </tex-math></inline-formula>/8 to act as the main resonant element, Graphene has been designed at <inline-formula> <tex-math>$lambda $ </tex-math></inline-formula>/2 dimensions, which works as the phase-shifting element under a copper patch. Graphene’s chemical potential can be varied by applying DC biasing to array elements so that the reflection coefficient phase of the unit cells can be adjusted to form a collimated beam in a certain direction. An array of 977 elements with an aperture diameter of <inline-formula> <tex-math>$15lambda $ </tex-math></inline-formula> produced a collimated beam through two states of DC biasing to graphene, i.e., “On” and “Off”. Later, the beam steering performance of the designed RRA was analysed in the E-plane and H-plane. Furthermore, the effect of the focal length to diameter ratio (F/D) is also evaluated on the highest gain and the steering range. The highest gain of 25.6 dBi was obtained at 125 GHz with a beam steering range of ±30° with a gain loss of 3 dB when the F/D ratio was 0.9. However, the best beam steering range of ±45° with a gain loss of 3 dB was obtained when the F/D ratio was 1.1 and the highest gain of 23.25 dBi. Overall, the aperture efficiency was found to be 13% which is sufficient compared to conventional phase shifters at high frequencies. The 1-dB gain of the designed array was found to be 8.8%, 7.2% and 6.4% in the case of F/D ratio of 1.1, 1.0 and 0.9, respectively. Owing to the broadband operation from 122 GHz to 128 GHz, beam steering range, and aperture efficiency, the designed RRA shows the potential to be incorporated with reconfigurable intelligent surface (RIS)-based communications for 6G point-to-point communications.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"7 3","pages":"768-779"},"PeriodicalIF":3.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10766424","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148513424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Counting Human Targets in Distributed Antenna Systems via the Coherent Point Spread Function of Radio-Field Scattering Modes","authors":"Frank E. Ebong;Andrea M. Tonello","doi":"10.1109/OJAP.2026.3666763","DOIUrl":"https://doi.org/10.1109/OJAP.2026.3666763","url":null,"abstract":"In this paper, we ask whether it is possible to count the number of persons in an indoor environment using a distributed antenna system. While previous work has approached this problem empirically using machine-learning classifiers, we develop a physics-informed approach that leverages electromagnetic field perturbations captured by the scattering parameters (S-Parameters). Specifically, we present a method for counting multiple walking human targets in an indoor environment by analyzing the peak response of the Coherent Point Spread Function (CPSF) associated with orthogonal scattering modes of the radio field. We show that the maximum number of human targets that can be reliably counted is determined by the rank of the system, which is imposed by the number of distributed antennas. To reveal this rank-limited behavior, the measured S-parameters are projected onto a discrete 3D Green-function kernel to construct a scattered-field tensor, from which a time-reversal operator is formed. Singular-value decomposition of this operator yields orthogonal scattering modes whose Coherent Point Spread Functions (CPSFs) characterize their response. We demonstrate experimentally that the CPSF peak response of the dominant singular vector exhibits a strict, monotonic increase with the number of human targets—but only up to the system’s rank. Once this limit is exceeded, the monotonic trend breaks down, reflecting the fundamental dependence of the metric on the system’s rank relative to the number of targets. Three independent measurement campaigns involving up to eight walking human targets confirm the reproducibility, robustness, and physical interpretability of the CPSF peak response derived from the dominant singular vector as a reliable metric for human counting. These results establish a new physics-informed approach for device-free crowd counting in complex indoor RF environments, without relying on machine learning.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"7 3","pages":"861-874"},"PeriodicalIF":3.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11404143","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148513563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Broadband and Hemispherical Coverage Characteristics of Compact and Asymmetric Dipole Array for Millimeter-Wave Portable Applications","authors":"Jae-Yeong Lee;Shuai Zhang;Wonbin Hong","doi":"10.1109/OJAP.2026.3683425","DOIUrl":"https://doi.org/10.1109/OJAP.2026.3683425","url":null,"abstract":"This article presents a compact and asymmetric dipole array (CADA) fabricated on a single-layer FR-4 PCB featuring hemispherical coverage across a broadband spectrum for the millimeter-wave (mmWave) portable applications. The compensation effect between inter-element capacitance and inductance of the proposed CADA can exhibit a high coupling level based on leaky-wave radiation behavior in a 1-D linear array with <inline-formula> <tex-math>$0.3lambda _{0}$ </tex-math></inline-formula> spacing (@ operating lowest freq.). However, it is possible to maintain a wide impedance matching bandwidth due to the absence of balun circuitry that can limit the operating bandwidth of the antenna. To investigate the influence of compression on the proposed 8-element CADA, array antennas with different inter-element spacing and T-junction power dividers, including the predetermined phased delay in each antenna element, are designed and characterized. In addition, high-precision compensation techniques for obtaining the accurate insertion loss of the T-junction power dividers are demonstrated to estimate the directivity of the stand-alone antenna array with different inter-element spacing in three different beam-steering scenarios. Afterward, the fabricated array antennas are characterized by their radiation patterns and beam scan range within 3-dB scan loss in the frequency range from 25 to 35 GHz, and over-the-air (OTA) results. Despite the compressed element configuration without additional baluns or decoupling circuits, the proposed array, based on an extremely low-cost fabrication process, realizes hemispherical coverage in the frequency range from 25 to 35 GHz. In addition, the proposed array exhibits lower than 9% error vector magnitude (EVM) at 4.8 Gbps maximum data rates.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"7 3","pages":"985-995"},"PeriodicalIF":3.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11480833","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148515314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Smart Electromagnetic Skin for Near-Field mmWave Communications: Design, System Implementation, and End-to-End Link Evaluation","authors":"Álvaro F. Vaquero;Sergio M. Feito;Álvaro Pendás-Recondo;Marcos R. Pino;Manuel Arrebola","doi":"10.1109/OJAP.2025.3637377","DOIUrl":"https://doi.org/10.1109/OJAP.2025.3637377","url":null,"abstract":"This work presents the design, RF evaluation, and demonstration of a communication link using a Smart Electromagnetic Skin (SES) operating in the millimeter-wave (mmWave) band within a realistic indoor environment. Two metasurface-based antennas are developed: one emulating a base station (BS) with high-gain directive beams, and a second metasurface acting as an SES to generate coverage and mitigate a static blind spot. The SES is designed considering that the blind spot lies in the near-field region and, to ensure a cost-effective solution, employs a unit cell topology based on a single dielectric layer with patch-type metallizations. Although this topology does not provide a full 360° phase cycle, it remains cost-efficient. This limitation is explicitly incorporated into the synthesis process, enabling near-field beam shaping while accounting for practical implementation constraints and the actual field distribution generated by the BS on the SES, without relying on a plane-wave approximation. Both antennas were designed, fabricated, and experimentally validated. The BS antenna was characterized in an anechoic chamber, while the SES was evaluated in a realistic indoor scenario. The measured radiation patterns confirm the effectiveness of the proposed synthesis method and the capability of the SES as a cost-efficient solution for mitigating static near-field blind spots. Furthermore, a near-field end-to-end communication link is implemented using the designed antennas, a complete RF chain, and modulated signals generated with software-defined radio (SDR) devices. This link is validated through error vector magnitude (EVM) and symbol error rate (SER) measurements within the SES coverage. The results validate not only the electromagnetic performance of the SES but also the feasibility of near-field (not short-range) mmWave communications in realistic conditions.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"7 3","pages":"1091-1103"},"PeriodicalIF":3.6,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11269357","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148214877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Superposition Method for Dual-Band Narrow-Wall Shorted-Slotted Waveguide Arrays at 3/4 GHz for Shared-Aperture ISAC Front-Ends","authors":"Joko Suryana;Ali Rhomadoni;Lenni Yulianti;Annaz Vatica","doi":"10.1109/OJAP.2026.3681910","DOIUrl":"https://doi.org/10.1109/OJAP.2026.3681910","url":null,"abstract":"This paper presents the design and implementation of a single-fed, dual-band narrow-wall shorted slotted waveguide array (SWA) operating at 3 GHz and 4 GHz within a shared aperture. Rather than treating the dual-band integration only as a geometric coexistence of two resonant slot families, this work introduces a coupling-aware multi-frequency formulation derived from the classical Elliott framework to interpret cross-family loading within a shared aperture. Within this formulation, the slot ensemble is partitioned into two frequency-selective families. Cross-family electromagnetic interactions are interpreted through a coupling perturbation term introduced within an extended multi-frequency impedance-matrix representation. The antenna is fabricated using a standard WR-284 waveguide platform and evaluated through full-wave simulation and experimental measurements. Results demonstrate that the integrated antenna maintains dual-band impedance matching with <inline-formula> <tex-math>$S_{11}lt -10~text {dB}$ </tex-math></inline-formula> at both target bands. Furthermore, the proposed design achieves a peak realized gain of 15.7 dBi with a sidelobe level of approximately -19 dB at 3 GHz, and a gain of 14.5 dBi at 4 GHz, while preserving stable broadside radiation. In the compared set of representative dual-band SWA studies, the narrow-wall realization exhibits a higher reported aperture efficiency, reaching 87.6% at S-band and 57.3% at C-band. This combination of compact footprint and relatively high efficiency supports the usefulness of the proposed multi-frequency superposition interpretation and suggests that the architecture is promising for space-constrained sub-6 GHz ISAC front-ends.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"7 3","pages":"962-975"},"PeriodicalIF":3.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11477789","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148511925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing Axial Ratio Bandwidth and Gain in Microstrip Antennas Through a 3D-Printed Curved Substrate","authors":"Giacomo Muntoni;Andrea Melis;Alessandro Fanti;Marco Simone;Giuseppe Mazzarella","doi":"10.1109/OJAP.2026.3686457","DOIUrl":"https://doi.org/10.1109/OJAP.2026.3686457","url":null,"abstract":"Curved substrates, enabled by additive manufacturing (3D printing), have proven to be a reliable approach for achieving impedance bandwidth enhancement and efficiency improvement in linearly polarized microstrip patch antennas. In this study, a novel application of this concept is instead investigated for circularly polarized antennas. Interestingly, it is found that the curved profile also provides significant benefits in this case, yielding a substantial increase in axial ratio bandwidth compared to the planar configuration (more than three times the original bandwidth), as well as the expected improvements in efficiency (and consequently gain) and impedance bandwidth. To validate these important findings, a prototype demonstrator, in the form of a curved, convex antenna resonating at 2.5 GHz, has been designed, fabricated and fully electromagnetically characterized.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"7 3","pages":"1009-1017"},"PeriodicalIF":3.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11493507","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148513327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Miniature Scanning Chern Topological Antenna With Eliminated Trivial Photonic-Crystal-Insulator","authors":"Ahmed Abdelraheem;Mostafa M. Elesawy;Alex D. Santiago-Vargas;Karim Seddik;Dimitrios Peroulis","doi":"10.1109/OJAP.2026.3684558","DOIUrl":"https://doi.org/10.1109/OJAP.2026.3684558","url":null,"abstract":"We report the first experimental realization of a Chern periodic topological leaky-wave antenna (LWA). Unlike previous designs, our proposed structure utilizes a quasi-uniform aperture mechanism that completely eliminates the bulky photonic-crystal trivial side and interfaces directly to open space through radiating slots. Through optimizing the radiating slots period and width, we achieve full control over the line-wave dispersion and consequently the radiation characteristics. This approach yields full control over the scanning angle, including precise broadside placement, while reducing the electrical size by <inline-formula> <tex-math>${45}%$ </tex-math></inline-formula> compared to the smallest existing Chern LWAs. The fabricated prototype delivers a measured gain of <inline-formula> <tex-math>${11.55}~{text {dBi}}$ </tex-math></inline-formula>, a measured frequency scanning range of 50°, a gain–bandwidth product (GBWP) of 2.11, and a fractional bandwidth of <inline-formula> <tex-math>${14}%$ </tex-math></inline-formula>. These metrics represent the highest GBWP reported among state-of-the-art Chern LWAs, validating the potential of this approach for compact, high-performance topological antenna systems.","PeriodicalId":34267,"journal":{"name":"IEEE Open Journal of Antennas and Propagation","volume":"7 3","pages":"996-1008"},"PeriodicalIF":3.4,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11482595","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148517336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}