IEEE Transactions on Antennas and Propagation最新文献_第5页

Equivalent External Noise Temperature of Time-Varying Receivers 时变接收机的等效外部噪声温度

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-03-27 DOI: 10.1109/TAP.2025.3553769

Kurt Schab;K. C. Kerby-Patel

引用次数: 0

An Ultralightweight Wideband Folded E-Shaped Patch Antenna Made From Aluminum Meshes for High-Power S-Band Applications 一种用于大功率s波段应用的铝网超轻宽带折叠e形贴片天线

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-03-26 DOI: 10.1109/TAP.2025.3552209

Hsiu-Ping Liao;Ian Huang;Shih-Yuan Chen

{"title":"An Ultralightweight Wideband Folded E-Shaped Patch Antenna Made From Aluminum Meshes for High-Power S-Band Applications","authors":"Hsiu-Ping Liao;Ian Huang;Shih-Yuan Chen","doi":"10.1109/TAP.2025.3552209","DOIUrl":"https://doi.org/10.1109/TAP.2025.3552209","url":null,"abstract":"This work presents an ultralightweight wideband folded E-shaped patch antenna designed for compact, lightweight, and high-power applications, operating within 2.9–3.5 GHz. It is composed solely of a folded E-shaped patch and a ground plane, both made of aluminum mesh. No dielectric substrate is used in this design to minimize weight and prevent heat buildup, while a high-strength, heat-resistant spacer is employed to support the patch and the ground plane. Due to the miniaturization and metallic mesh design of the antenna, its weight is dramatically reduced by 90.34%, weighing less than 1 g. The wideband performance is achieved through two adjacent resonances excited by the E-shaped patch. For high-power analysis, the design employs electromagnetic (EM) heating methods to better simulate the real heating behavior. This fully meshed design exhibits sufficient power-handling performance of 3.4 MW and maintains the temperature at an acceptable 318.69 K under a 75-W continuous-wave (CW) input power. To verify feasibility, a prototype antenna is constructed using metal 3-D printing. The measured results align well with the simulation results. The prototype antenna achieves a gain of 6.4–7.4 dBi and a front-to-back ratio exceeding 12.1 dB within a 19.60% bandwidth (BW), fulfilling the desired requirements for potential high-power S-band applications.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 7","pages":"4969-4974"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

OAM Backhaul Link Supporting 1 Tbps Over 1-km Transmission Based on Cassegrain Antennas 基于卡塞格伦天线的支持1tbps超过1km传输的OAM回程链路

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-03-26 DOI: 10.1109/TAP.2025.3553394

Qiuli Wu;Chao Zhang

{"title":"OAM Backhaul Link Supporting 1 Tbps Over 1-km Transmission Based on Cassegrain Antennas","authors":"Qiuli Wu;Chao Zhang","doi":"10.1109/TAP.2025.3553394","DOIUrl":"https://doi.org/10.1109/TAP.2025.3553394","url":null,"abstract":"Orbital angular momentum (OAM) beams present an inverted cone form and divergence. Consequently, the transmission distance and rate of the backhaul link based on OAM are severely limited. On the other hand, in the upcoming beyond fifth-generation (B5G) mobile communications and sixth-generation (6G) mobile communications, the demand for communication distance between the macro base station (BS) and the self-backhaul small cell (SBSC) ranges from hundreds of meters to several kilometers, and the demand for transmission rate ranges between 100 Gb/s and 1 Tbps. The OAM beam generated by the uniform circular array (UCA) exhibits inverted cone divergence. The difference in divergence angle between different modes can be two times or even more than three times. This makes it impossible to achieve long-distance and high-speed transmission simultaneously. In order to construct a 1-km and Tbps OAM transmission system, this article proposes a symmetric OAM transmission scheme using cassegrain antennas (CAs). The CAs can converge the OAM beams and achieve high antenna gain. When the antennas are strictly coaxially aligned, backhaul links supporting a 1-km transmission distance and a 1-Tbps transmission rate are constructed. Furthermore, the effectiveness of the backhaul link transmission scheme using symmetric CAs is verified through mathematical models, simulations, and experiments.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 7","pages":"4829-4839"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144606353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

High-Performance Hybrid-FDTD Investigation for Characterizing the Electromagnetic Transmission Attributes of Media With Arbitrary Shapes 任意形状介质电磁传输特性的高性能混合时域有限差分研究

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-03-26 DOI: 10.1109/TAP.2025.3571528

Yaxiu Sun;Xinyu Kang;Dawei Zhang;Junyan Wang;Ruifeng Sun;Wan Chen

{"title":"High-Performance Hybrid-FDTD Investigation for Characterizing the Electromagnetic Transmission Attributes of Media With Arbitrary Shapes","authors":"Yaxiu Sun;Xinyu Kang;Dawei Zhang;Junyan Wang;Ruifeng Sun;Wan Chen","doi":"10.1109/TAP.2025.3571528","DOIUrl":"https://doi.org/10.1109/TAP.2025.3571528","url":null,"abstract":"Accurately and effectively analyzing the electromagnetic properties of media with arbitrary shapes has always been a difficult and challenging problem in the field of electromagnetic simulation. Traditional methods often encounter issues such as low computational efficiency and insufficient accuracy. To address above problems, this article proposes the hybrid finite-difference time-domain (H-FDTD) method based on the Drude two critical points (Drude2CPs) model. The H-FDTD algorithm introduced encompasses the alternating direction implicit finite difference time domain (ADI-FDTD) method and the dispersive contour path finite difference time domain method based on Drude2CP (DCP-FDTD-D2CP). The ADI-FDTD for non-dispersive case leads to an elevation in computational efficiency. The DCP-FDTD-D2CP algorithm is specifically applicable to the dispersion scenario occurring at the interface between metal and dielectric. In this context, the frequency-dependent formulae employ the trapezoidal recursive convolution (TRC) technique. In addition, the rigorous analysis shows that the proposed H-FDTD algorithm is theoretically stable. To validate its efficacy, a series of numerical examples was carried out, specifically involving metal circular waveguides and slotted coaxial lines. The obtained results indicate that the relative error of this method is maintained below 1%, and the computational efficiency is enhanced by 60% in comparison with the traditional finite-difference time-domain (FDTD) algorithm. Consequently, this method exhibits the characteristics of stability, high precision, and high efficiency. Moreover, it is convenient for simulating and analyzing complex structures.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 7","pages":"4595-4604"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 Efficiency-Enhanced High-Gain Large-Element Array for 220-GHz Band Applications 一种用于220-GHz频段的高效率高增益大元阵列

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-03-26 DOI: 10.1109/TAP.2025.3553382

Chen-Yu Ding;Jia-Hui Zhao;De-Ming Sun;Zhuo-Wei Miao;Longzhu Cai;Yuehe Ge;Zhang-Cheng Hao

{"title":"An Efficiency-Enhanced High-Gain Large-Element Array for 220-GHz Band Applications","authors":"Chen-Yu Ding;Jia-Hui Zhao;De-Ming Sun;Zhuo-Wei Miao;Longzhu Cai;Yuehe Ge;Zhang-Cheng Hao","doi":"10.1109/TAP.2025.3553382","DOIUrl":"https://doi.org/10.1109/TAP.2025.3553382","url":null,"abstract":"Compared to small radiating elements, large elements can reduce the stages and the losses of power dividers (PDs) within the same array aperture, significantly enhancing the array’s radiation efficiency. However, it faces the grating lobe challenge when they are formed into an array. This article investigates the factors that affect the rectangular lattice large-element array’s sidelobe levels (SLLs). Results show that the sidelobes are independent of element spacing but closely related to aperture efficiency (AE) and array scale. The element’s AE and number in the arraying dimension are suggested to be at least 82% and 4, respectively. The lens is selected as the large element’s architecture because its optimized feed and phase-shifting surface make it relatively easy to achieve a higher field uniformity, that is, a higher AE. Methods for extracting the 1-D aperture efficiencies of a 2-D region are proposed in this article to validate the derived SLL rules in full-wave simulations, and a simplified form is employed for the rapid optimization of architectural parameters. Finally, a <inline-formula> <tex-math>$4times 4$ </tex-math></inline-formula> scale high AE lens array is designed with an element size of <inline-formula> <tex-math>$6lambda _{0} times 10lambda _{0}$ </tex-math></inline-formula>. The reached directivity at 220 GHz is 39.7 dBi, with AE almost above 70% within the <inline-formula> <tex-math>$170sim 260$ </tex-math></inline-formula>-GHz band. For the convenience of measurement, a prototype with a 16-way PD is fabricated. The measured peak realized gain is 37 dBi, with a peak total efficiency of 42% and a 3-dB gain bandwidth of 20.7%.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 7","pages":"4498-4510"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144598012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

A Novel Circularly Polarized Filtering Reflectarray by Manipulating the Multimode Reflective Phase of Orthogonal Polarizations 一种利用正交偏振的多模反射相位控制的新型圆偏振滤波反射阵列

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-03-26 DOI: 10.1109/TAP.2025.3553374

Chang Fang;Xiao Zhang;Yin Li;Lei Zhu;Sai-Wai Wong;Zhi Quan

{"title":"A Novel Circularly Polarized Filtering Reflectarray by Manipulating the Multimode Reflective Phase of Orthogonal Polarizations","authors":"Chang Fang;Xiao Zhang;Yin Li;Lei Zhu;Sai-Wai Wong;Zhi Quan","doi":"10.1109/TAP.2025.3553374","DOIUrl":"https://doi.org/10.1109/TAP.2025.3553374","url":null,"abstract":"This article presents a novel design methodology for circularly polarized (CP) filtering reflectarray (RA). Unlike conventional filtering techniques based on magnitude response, the proposed filtering RA solely manipulates the phase responses of the reflected wave under the total reflection condition. An isosceles triangle patch radiator loaded with slots is employed as the unit cell. Two sets of orthogonal resonant modes of the triangular patch are exploited to produce a phase difference between the <italic>u</i>- and <italic>v</i>-polarized components. By adopting slot loading, the first- and third-order resonant states are induced in the two orthogonal directions. Next, the phase difference is fully controlled by adjusting the slope of the reflection phase. In the passband, the phase difference is maintained at 180°, while outside the band, it rapidly rolls down (up) to 0° (360°), enabling steep band edges. Finally, a CP filtering RA using the optimized element is constructed for the first time, which verifies the validity of the proposed method. The fabricated RA exhibits satisfactory performance, including a 3-dB gain bandwidth of 25.7%, 3-dB axial ratio (AR) bandwidth of 29.8%, and the out-of-band suppression levels of 33.5 dB (22.8 dB) in the low- (high) frequency band.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 7","pages":"4549-4558"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Channel Modeling and Evaluation on Terahertz Orbital Angular Momentum (OAM)-Based Intersatellite Communications 基于太赫兹轨道角动量（OAM）的星间通信信道建模与评价

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-03-25 DOI: 10.1109/TAP.2025.3551609

Weijun Gao;Zhirong Yang;Chong Han

{"title":"Channel Modeling and Evaluation on Terahertz Orbital Angular Momentum (OAM)-Based Intersatellite Communications","authors":"Weijun Gao;Zhirong Yang;Chong Han","doi":"10.1109/TAP.2025.3551609","DOIUrl":"https://doi.org/10.1109/TAP.2025.3551609","url":null,"abstract":"Providing continuous bandwidth of several tens of gigahertz, terahertz (THz) intersatellite links (ISLs) hold great promise for high-speed space communications. To address the lack of spatial degree of freedom (DoF) to further enhance the capacity of THz ISLs, orbital angular momentum (OAM) is introduced, which realizes orthogonal signal transmission in the mode domain. However, the satellite perturbation caused by the oblateness of the Earth, called the <inline-formula> <tex-math>$J_{2}$ </tex-math></inline-formula> effect, leads to beam deviation, which induces undesired OAM mode transition and results in interchannel interference (ICI). In this article, a deterministic channel model for OAM-based THz ISLs considering <inline-formula> <tex-math>$J_{2}$ </tex-math></inline-formula> perturbation is proposed. Specifically, an analytical solution of the relative motion equation (RME) of satellite pairs is derived to precisely characterize the beam deviation induced by <inline-formula> <tex-math>$J_{2}$ </tex-math></inline-formula> perturbation. Then, the OAM mode decomposition is derived for deviated THz OAM beams, based on which the intended signals and interference signals are modeled. By incorporating the <inline-formula> <tex-math>$J_{2}$ </tex-math></inline-formula> perturbation characterization into the OAM mode decomposition, the interference power and capacity of OAM-based THz ISL can be determined. For OAM-based THz ISLs, simulation results indicate that: 1) the capacity first increases and then decreases with growing deviation; 2) with proper deviation (~1.5 km), the implementation of OAM can provide double or higher peak capacity compared to THz ISLs without OAM; 3) with significant deviation (>3 km), a larger receiver aperture decreases the capacity; and 4) the proper radius of the receiver aperture is 0.5 m and satellite pairs should calibrate after 180 min at 600 km operating in dual-OAM mode multiplexing to restrict deviation and ensure high data rates.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 7","pages":"4840-4852"},"PeriodicalIF":4.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144606355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 Effective Approach to Instantaneous Rain Attenuation Frequency Scaling Using Single or Multiple Satellite-Based Measurements 基于单个或多个卫星测量的瞬时雨衰减频率标度的有效方法

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-03-24 DOI: 10.1109/TAP.2025.3552227

Francesco Capelletti;Lorenzo Luini

{"title":"An Effective Approach to Instantaneous Rain Attenuation Frequency Scaling Using Single or Multiple Satellite-Based Measurements","authors":"Francesco Capelletti;Lorenzo Luini","doi":"10.1109/TAP.2025.3552227","DOIUrl":"https://doi.org/10.1109/TAP.2025.3552227","url":null,"abstract":"A novel frequency scaling (FS) methodology, termed effective instantaneous frequency scaling (EIFS), is proposed for the real-time prediction of rain attenuation affecting Earth-space communication links. This approach enables the estimation of rain attenuation at a target frequency by scaling concurrent measurements taken along the same path at one or more lower frequencies. Propagation data from three beacon frequencies-18.7, 39.6, and 49.5 GHz-collected at the Spino d’Adda ground station during the 19951996 ITALSAT experimental campaign, were used to evaluate the accuracy of the proposed model. The results demonstrate excellent prediction accuracy, both statistically (root mean square (rms) of the percentage error approximately equal to 13%) and in terms of time series (rms of the absolute error lower than 1 dB), making EIFS well-suited for the design and operation of adaptive propagation impairment mitigation techniques (PIMTs). Moreover, the application of EIFS with concurrent data from two frequencies provides highly accurate estimates of point rain rate time series, indicating its potential use for remote sensing applications as well.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 7","pages":"4853-4862"},"PeriodicalIF":4.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144606418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Double-Curved Conformal Bandpass Frequency Selective Surface for Radome Applications 天线罩应用的双曲面共形带通频率选择曲面

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-03-24 DOI: 10.1109/TAP.2025.3552218

Akhila Gouda;Saptarshi Ghosh

引用次数: 0

Limited CSI Feedback System for Massive MISO: A Neural Network-Aided SVD Approach 大规模MISO的有限CSI反馈系统：一种神经网络辅助SVD方法

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-03-24 DOI: 10.1109/TAP.2025.3552212

Javad Ebrahimizadeh;Fredrik Rusek;Erik Bengtsson;Jose Flordelis;Evgenii Vinogradov;Guy A. E. Vandenbosch

{"title":"Limited CSI Feedback System for Massive MISO: A Neural Network-Aided SVD Approach","authors":"Javad Ebrahimizadeh;Fredrik Rusek;Erik Bengtsson;Jose Flordelis;Evgenii Vinogradov;Guy A. E. Vandenbosch","doi":"10.1109/TAP.2025.3552212","DOIUrl":"https://doi.org/10.1109/TAP.2025.3552212","url":null,"abstract":"This article introduces a novel approach for a limited but important form of channel state information (CSI) feedback in massive multiple-input single-output (MISO) systems. Leveraging feedforward neural network (FFNN) enhancement to estimate the singular values of the channel, the proposed method optimizes the estimation of channel characteristics between access points (APs) and user equipment (UE). Through the exchange of dominant singular values, the joint neural network system enables an accurate estimation of channel singular values despite noisy channel constraints. This innovative technique significantly improves the efficiency and scalability of channel characteristic estimation in complex MISO environments, representing a substantial advancement in wireless communication systems. Simulations for a complex Gaussian channel and a 2-D indoor scenario at the L band with a channel rank of 16 confirm the joint FFNN’s ability to estimate all channel singular values by measuring only the received signal using four orthogonal beams, and a measurement campaign at the millimeter frequency band validates the estimation of 32 singular values using eight orthogonal DFT beams. Moreover, the neural network exhibits superior robustness to noisy channels compared with conventional deterministic sample mean estimation methods. Finally, it is shown that the performance of FFNN improved using the attention mechanism.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 7","pages":"4891-4902"},"PeriodicalIF":4.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144606277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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