发布求助
文献互助 智能选刊 最新文献

IEEE Antennas and Wireless Propagation Letters最新文献

筛选
英文 中文
Experimental Proof-of-Concept for Use of Probe Signal Derivatives in Spherical Near-Field Antenna Measurements
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2024-12-11 DOI: 10.1109/LAWP.2024.3515010
Kyriakos Kaslis;Samel Arslanagić;Olav Breinbjerg
{"title":"Experimental Proof-of-Concept for Use of Probe Signal Derivatives in Spherical Near-Field Antenna Measurements","authors":"Kyriakos Kaslis;Samel Arslanagić;Olav Breinbjerg","doi":"10.1109/LAWP.2024.3515010","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3515010","url":null,"abstract":"Spherical near-field antenna measurements utilize samples of the probe signal on a spherical grid in the near-field of the antenna under test in order to deduce useful properties of the latter, such as its gain or directivity. The required number of probe signal samples is determined by the radius of the minimum sphere enclosing the antenna under test. Recently, effort has been placed into using the spatial derivatives of the acquired samples in order to reduce the measurement time. Here, we present new experimental results demonstrating the feasibility of using both probe signals and probe signal derivatives through comparison with the standard technique of using only probe signals.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 3","pages":"746-750"},"PeriodicalIF":3.7,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Single-SICL-Fed Dual-Band Dual-Circularly Polarized Antenna Array Using Pixel Structures
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2024-12-11 DOI: 10.1109/LAWP.2024.3516357
Qian Chen;You-Feng Cheng;Cheng Liao;Ting Shi;Lin Peng
{"title":"Single-SICL-Fed Dual-Band Dual-Circularly Polarized Antenna Array Using Pixel Structures","authors":"Qian Chen;You-Feng Cheng;Cheng Liao;Ting Shi;Lin Peng","doi":"10.1109/LAWP.2024.3516357","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3516357","url":null,"abstract":"In this letter, a dual-band dual-circularly polarized (CP) antenna array based on the design and optimization of a parasitic pixel structure is presented. The proposed array can achieve simultaneous radiation of right-hand CP around 20 GHz and left-hand CP around 30 GHz with a single substrate integrated coaxial line (SICL) feeding structure. The array element comprises a linearly polarized (LP) magnetoelectric dipole as the driven source and a parasitic pixel layer providing the dual CP radiation. Assisted by nondominated sorting genetic algorithm II and the internal multiport method, the pixel layer is optimized to transform the LP radiation of the source into dual CP ones within dual desired frequency bands. Finally, a prototype of an SICL-based low-loss four-way feeding network integrated with the proposed 2 × 2 array is designed, fabricated, and experimentally verified. Measured results demonstrate that the impedance and AR bandwidths are 18.4 GHz to 21.6 GHz and 19.5 GHz to 20.7 GHz at <italic>K</i> band, 28.6 GHz to 31 GHz and 29.5 GHz to 31.2 GHz at <italic>Ka</i> band, respectively. Besides, the realized peak gains within the two operation bands are 10.7 dBic and 12.8 dBic, offering a more efficient and compact solution compared to existing designs.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 3","pages":"761-765"},"PeriodicalIF":3.7,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of Input Resistance Increase by Human Body Conductivity at Embedded Normal-Mode Helical Antenna
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2024-12-11 DOI: 10.1109/LAWP.2024.3516129
Norsiha Zainudin;Norhudah Seman;Yoshihide Yamada;Rasyidah Hanan Mohd Baharin;Kamilia Kamardin;Tarik Abdul Latef
{"title":"Analysis of Input Resistance Increase by Human Body Conductivity at Embedded Normal-Mode Helical Antenna","authors":"Norsiha Zainudin;Norhudah Seman;Yoshihide Yamada;Rasyidah Hanan Mohd Baharin;Kamilia Kamardin;Tarik Abdul Latef","doi":"10.1109/LAWP.2024.3516129","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3516129","url":null,"abstract":"A normal-mode helical antenna (NMHA) is widely used as a human body sensor for human health care applications. It is gaining interest in integration with 5G/6G technologies due to its compact size and high efficiency. The conductivity of the human body significantly affects the antenna's electrical performances, such as input resistance and radiation power. Previously, the increase in input resistance was related to a reduction in the NMHA electric current. However, the effect of electric power absorption by conductivity is crucial and has not been clarified in previous research. This letter clarifies the relationship between antenna input power and the surrounding power through electromagnetic simulations in the self-resonant condition of NMHA at 402 MHz. Notably, the Poynting vector on the antenna surface decreases as conductivity increases. In the case of self-resonant, the radiation power represented by the Poynting vector corresponds to the antenna input power. The dependence of input resistance on conductivity in the human stomach, skin, and fat is obtained by analyzing the relationship between input power and input resistance. The proposed method aligns well with previously obtained results. Moreover, measurement results of NMHA in the stomach and fat phantom are provided to validate the simulation results.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 3","pages":"751-755"},"PeriodicalIF":3.7,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Angle-Multiplexed Multifocal Method for D-Band 2-D Beam-Scanning Transmitarray Leveraging 3-D Transmission Line Component
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2024-12-11 DOI: 10.1109/LAWP.2024.3514615
Jiexin Lai;Xiaojing Lv;Md Mirazur Rahman;Md Ashif Islam Oni;Shuvashis Dey;Yang Yang
{"title":"An Angle-Multiplexed Multifocal Method for D-Band 2-D Beam-Scanning Transmitarray Leveraging 3-D Transmission Line Component","authors":"Jiexin Lai;Xiaojing Lv;Md Mirazur Rahman;Md Ashif Islam Oni;Shuvashis Dey;Yang Yang","doi":"10.1109/LAWP.2024.3514615","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3514615","url":null,"abstract":"This letter proposes an angle-multiplexed multifocal method for designing a 2-D beam-scanning transmitarray (TA). The angle-multiplexed method is commonly used to generate orbital angular momentum (OAM) multiplexing. The multifocal phase distribution is calculated using the angle-multiplexed and bifocal methods to achieve higher gain enhancement and 2-D beam-scanning with a low scan loss without optimization. The additive manufacturing technology is used to fabricate a 3-D transmission line component. In the terahertz band, the transmitting and receiving (Tx-Rx) unit cell impedance matching can be affected by the Pancharatnam–Berry (P-B) method, and a 3-D coaxial line is introduced to tackle this problem. For proof of concept, the prototype was fabricated. Feeded by a WR-06 waveguide probe, the proposed TA achieves a gain enhancement of 16.3 dB and ±30° 2-D beam-scanning, simulated and measured 3 dB gain bandwidths of 19.6% and 16.3%, and the measured axial ratio bandwidth of 30.7%.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 3","pages":"731-735"},"PeriodicalIF":3.7,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Low-Profile MIMO Trapezoidal Patch Antenna for 5G Wideband Mobile Antenna Application
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2024-12-09 DOI: 10.1109/LAWP.2024.3512854
Shao-Hung Cheng;Shu-Chuan Chen;Wen-Yi Huang
{"title":"Low-Profile MIMO Trapezoidal Patch Antenna for 5G Wideband Mobile Antenna Application","authors":"Shao-Hung Cheng;Shu-Chuan Chen;Wen-Yi Huang","doi":"10.1109/LAWP.2024.3512854","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3512854","url":null,"abstract":"This letter proposes a low-profile trapezoidal patch quad antenna for 5G broadband mobile applications. The multiple-input–multiple-output (MIMO) four-antenna is printed on an FR4 glass fiber substrate with a size of 42 mm × 42 mm (about 0.581λ × 0.581λ at 4.15 GHz) and a thickness of 0.4 mm. The system ground plane is 42 mm × 42 mm, and the air layer is 1.6 mm above the ground plane. The total cross-sectional height is only 2.0 mm (about 0.027λ at 4.15 GHz). The antenna features four identically sized coupled feed structures, each with a 90° rotated trapezoidal patch antenna. A shorting pin near the feeding point is added to improve matching and isolation, successfully covering the sub-6-GHz broadband spectrum from 3.3 GHz to 5.0 GHz and achieving a 41% bandwidth at 4.15 GHz. The isolation between antennas is more than 10 dB. The calculated envelope correlation coefficient values are less than 0.13. The radiation efficiency of the four antennas has been measured to exceed 40%.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 3","pages":"696-700"},"PeriodicalIF":3.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optically Transparent and Rollable Metafilm for Electromagnetic Absorption Using Screen Printed Metal Mesh
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2024-12-09 DOI: 10.1109/LAWP.2024.3512587
Daecheon Lim;Sungjoon Lim
{"title":"Optically Transparent and Rollable Metafilm for Electromagnetic Absorption Using Screen Printed Metal Mesh","authors":"Daecheon Lim;Sungjoon Lim","doi":"10.1109/LAWP.2024.3512587","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3512587","url":null,"abstract":"In this letter, we propose a transparent and rollable electromagnetic wave-absorbing film that employs screen printing and metal mesh technologies. Despite the film being very thin, it successfully absorbed electromagnetic waves. The proposed metafilm was designed with a small surface area pattern and a metal mesh ground, rendering it transparent to visible light. In addition, since the metamaterial unit structure of this absorption film uses an incident angle insensitive structure, it can function as an electromagnetic wave absorber, even when the film is bent. The metafilm sample was fabricated by printing metamaterial absorbers on polyethylene terephthalate (PET) films using screen printing technology. It was confirmed that this film transmits about 64% of light compared to the visible light transparency of the PET film having the same thickness. The electromagnetic absorption performance of the film was over 90% in both the flat state and curved state.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 3","pages":"686-690"},"PeriodicalIF":3.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multifunctional Radio Frequency Device With Integrated Dual-Polarized Antenna, Filters, and Power Combiners for Base-Station Applications
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2024-12-09 DOI: 10.1109/LAWP.2024.3512517
Jiageng Xu;Chunxu Mao;Xiu Yin Zhang
{"title":"Multifunctional Radio Frequency Device With Integrated Dual-Polarized Antenna, Filters, and Power Combiners for Base-Station Applications","authors":"Jiageng Xu;Chunxu Mao;Xiu Yin Zhang","doi":"10.1109/LAWP.2024.3512517","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3512517","url":null,"abstract":"This letter proposes a multifunctional radio frequency (RF) device that integrating filters, antennas and power combiners for base station applications. The design mainly consists of a pair of driven patches, a parasitic patch and two pairs of transmission lines with open-circuit stepped-impedance resonators as the feeds. This design employs the TM<sub>00</sub> mode of a driven patch to transmit energy and form a fourth-order low-pass filter by utilizing the opened circuit stubs, while the TM<sub>10</sub> mode of the patch to form a frequency band for radiation. The proposed device exhibits filtering performance with high roll-off at the upper and lower band edges when it works as an antenna, and when it works as a low-pass filter, it has a cutoff frequency at around 1 GHz with a low insertion loss of 0.6 dB and a wide stopband up to 2.5 GHz. For demonstration, the proposed multifunctional device is implemented and verified. The proposed multifunctional device could be used to feed multiple antennas with different operating bands in series, resulting in a miniaturization and high integration of the RF frontend system.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 3","pages":"681-685"},"PeriodicalIF":3.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Compact High-Efficiency All-Polarization Rectenna for Wireless Power Transmission
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2024-12-09 DOI: 10.1109/LAWP.2024.3513403
Haoming He;Zongyang Dan;Zhongqi He;Changjun Liu
{"title":"Compact High-Efficiency All-Polarization Rectenna for Wireless Power Transmission","authors":"Haoming He;Zongyang Dan;Zhongqi He;Changjun Liu","doi":"10.1109/LAWP.2024.3513403","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3513403","url":null,"abstract":"In this letter, we present an innovative design for a compact, high-efficiency all-polarization receiving rectenna tailored for wireless power transmission. This rectenna, which integrates an antenna with two same rectifier units, employs direct conjugate matching of antenna impedance to rectifier impedance. This approach eliminates the necessity for an external impedance-matching network, thereby reducing the overall dimensions of the rectenna. The implementation of virtual ground concept streamlines the design of the rectifier's output filter. The low-profile antenna, engineered for operation at 2.45 GHz, demonstrates high conversion efficiency across all polarization angles. The measured RF-to-DC efficiency exceeds 63% for all polarization angles, achieving a peak efficiency of 82.2%.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 3","pages":"706-710"},"PeriodicalIF":3.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hybrid Irregular Tiled Arrays for Wide-Angle and Low-Sidelobe Scanning With Mixed Integer Linear Programming
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2024-12-09 DOI: 10.1109/LAWP.2024.3514196
Yankai Ma;Qiang Sun;Jianquan Hu;Qianyin Xiang;Quanyuan Feng
{"title":"Hybrid Irregular Tiled Arrays for Wide-Angle and Low-Sidelobe Scanning With Mixed Integer Linear Programming","authors":"Yankai Ma;Qiang Sun;Jianquan Hu;Qianyin Xiang;Quanyuan Feng","doi":"10.1109/LAWP.2024.3514196","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3514196","url":null,"abstract":"The segmentation of phased array apertures into distinct sets of tile modules, referred to as irregular tiled arrays, is highly appealing in scenarios requiring cost efficiency. However, the limited scanning abilities restrict broader applications. To mitigate this limitation, we propose a hybrid subarray architecture that enhances flexibility by utilizing the diverse scanning advantages offered by various subarray sizes and shapes. A mixed integer linear programming model is developed to optimize the tiling configuration to adapt the array design to meet different sidelobe level (SLL) and maximum scanning angle requirements. Benders decomposition is employed to efficiently decouple and solve both integer and continuous variables. The proposed array structure exhibits network complexity that falls between traditional irregular arrays and nonadjacent arrays. Compared to traditional arrays, it achieves more than 4 dB sidelobe suppression and a 1.1 dB gain improvement. Compared with nonadjacent arrays, the proposed array not only extends the scanning angle but also achieves significantly lower SLLs, offering superior performance for wide-angle scanning applications.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 3","pages":"726-730"},"PeriodicalIF":3.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Machine-Learning-Based Optimization Method for Polarization-Rotation Element in Broadband and High-Aperture-Efficiency Metalens Antenna
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2024-12-09 DOI: 10.1109/LAWP.2024.3511999
Ruoyang Yang;Jie Wu;Jianing Zhao;Hao Li;Tianming Li;Fang Li;Haiyang Wang;Yihong Zhou;Biao Hu;Cheng Fu
{"title":"Machine-Learning-Based Optimization Method for Polarization-Rotation Element in Broadband and High-Aperture-Efficiency Metalens Antenna","authors":"Ruoyang Yang;Jie Wu;Jianing Zhao;Hao Li;Tianming Li;Fang Li;Haiyang Wang;Yihong Zhou;Biao Hu;Cheng Fu","doi":"10.1109/LAWP.2024.3511999","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3511999","url":null,"abstract":"A machine-learning-based method is utilized to design and optimize the polarization rotation element (PRE) used for the design of broadband and high-aperture-efficiency metalens antenna (MLA) in this letter. Artificial neural networks (ANNs) are employed to establish a library mapping the geometrical parameters of the PRE to the primary electromagnetic responses. Subsequently, genetic algorithm (GA) is applied to the predicted library to comprehensively optimize the geometrical parameters, achieving the target responses. To verify the effectiveness of the proposed method, an MLA prototype, which consists of 43 × 43 PREs is designed, fabricated and measured. The measured results closely align with the simulations. The experimental result shows that the peak aperture efficiency could reach 63.79% at 10 GHz, and the corresponding gain is 27.73 dBi. More importantly, the bandwidths of 1 dB and 3 dB gain are measured to be 37.34% and 57.48%, respectively.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 3","pages":"676-680"},"PeriodicalIF":3.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信