IEEE Transactions on Antennas and Propagation最新文献_第10页

Electromagnetic Design Method of Radomes Under High-Temperature Environment 高温环境下天线罩电磁设计方法

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-17 DOI: 10.1109/TAP.2025.3528646

Lixin Yang;Yanbin Li;Qiang Chen;Dahai Zhang;Qingguo Fei;Jian Liu

引用次数: 0

Graphene-Based Current-Vector Control Method and Its Application to Continuous Polarization Reconfigurable Antennas 基于石墨烯的电流矢量控制方法及其在连续极化可重构天线中的应用

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-17 DOI: 10.1109/TAP.2025.3528726

Junfeng Li;Bian Wu;Jiaqi Zhou;Jing Ning;Qiao Sun;Ying Liu

{"title":"Graphene-Based Current-Vector Control Method and Its Application to Continuous Polarization Reconfigurable Antennas","authors":"Junfeng Li;Bian Wu;Jiaqi Zhou;Jing Ning;Qiao Sun;Ying Liu","doi":"10.1109/TAP.2025.3528726","DOIUrl":"https://doi.org/10.1109/TAP.2025.3528726","url":null,"abstract":"In this article, two graphene-based current-vector control methods are first proposed. The first method utilizes the resistive property of graphene to achieve directional absorption of electromagnetic energy, thereby controlling the current amplitude. The second method exploits the differences in absorption characteristics of multiple graphene sheets in various operational states to create potential differences and generate orthogonal radiation currents, thus controlling the current direction. Then two continuous polarization reconfigurable antennas are presented using the two current-vector control methods. The polarization mode of the antenna adopting the graphene-based current amplitude control method can be tuned between left-hand circular polarization (LHCP) and linear polarization (LP) continuously with a radiation efficiency exceeding 55% at 3.2 GHz. The reconfigurable antenna utilizing the current direction control method can achieve continuously full polarization reconfigurability at 1.6 GHz. By incorporating the first proposed graphene-interlayer structure, the radiation efficiency of the antenna is enhanced by over 88% compared to the antenna loaded with graphene directly. The two graphene-based current-vector control methods proposed in this article offer new approaches for reconfigurable antenna design and expand the application scenarios of graphene.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 5","pages":"2895-2907"},"PeriodicalIF":4.6,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929744","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

Convolutional CFS-PML for the 2-D Crank–Nicolson FDTD Scheme and Its Application in Simulation of Ultralow Frequency Electromagnetic Problems 二维Crank-Nicolson时域有限差分格式的卷积CFS-PML及其在超低频电磁问题仿真中的应用

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-13 DOI: 10.1109/TAP.2025.3526905

Mohammadreza Roohie;Afshin Rezaei-Zare

{"title":"Convolutional CFS-PML for the 2-D Crank–Nicolson FDTD Scheme and Its Application in Simulation of Ultralow Frequency Electromagnetic Problems","authors":"Mohammadreza Roohie;Afshin Rezaei-Zare","doi":"10.1109/TAP.2025.3526905","DOIUrl":"https://doi.org/10.1109/TAP.2025.3526905","url":null,"abstract":"A convolutional implementation of the perfectly matched layer (PML) absorbing boundary condition (ABC) with complex frequency-shifted (CFS) constitutive parameters is developed for the original 2-D Crank-Nicolson (CN) scheme of the finite-difference time-domain (FDTD) method. The proposed CN-FDTD method leverages the benefits of both CFS-PML and the unconditionally stable CN scheme, overcoming the stability limits of the conventional FDTD method and decreasing the numerical reflection of evanescent waves. The effectiveness of the proposed scheme is validated by conducting an analysis of the absorbing boundary reflection error and the simulation speed. For an ultralow frequency and small-scale problem with an extremely fine spatial mesh size (<inline-formula> <tex-math>$2times 10^{7}$ </tex-math></inline-formula> times smaller than the minimum exited wavelength) and using time steps <inline-formula> <tex-math>$4times 10^{6}$ </tex-math></inline-formula> times larger than those in conventional FDTD, we achieved a CPU time improvement of up to <inline-formula> <tex-math>$2.9360times 10^{4}$ </tex-math></inline-formula> times compared to the conventional FDTD method, with less than 3% numerical error.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 5","pages":"3095-3107"},"PeriodicalIF":4.6,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143925229","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

Multiple-Frequency-Band Channel Characterization for In-Vehicle Wireless Networks 车载无线网络多频段信道特性研究

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-13 DOI: 10.1109/TAP.2025.3526860

Mengting Li;Yifa Li;Qiyu Zeng;Kim Olesen;Fengchun Zhang;Wei Fan

{"title":"Multiple-Frequency-Band Channel Characterization for In-Vehicle Wireless Networks","authors":"Mengting Li;Yifa Li;Qiyu Zeng;Kim Olesen;Fengchun Zhang;Wei Fan","doi":"10.1109/TAP.2025.3526860","DOIUrl":"https://doi.org/10.1109/TAP.2025.3526860","url":null,"abstract":"In-vehicle wireless networks are crucial for advancing smart transportation systems and enhancing interaction among vehicles and their occupants. However, there are limited studies in the current state-of-the-art that investigate the in-vehicle channel characteristics in multiple frequency bands. In this article, we present measurement campaigns conducted in a van and a car across below 7 GHz, millimeter-wave (mmWave), and subterahertz (sub-THz) bands. These campaigns aim to compare the channel characteristics for in-vehicle scenarios across various frequency bands. Channel impulse responses (CIRs) were measured at various locations distributed across the engine bay of both the van and the car. The CIR results reveal a high similarity in the delay properties between frequency bands below 7 GHz and mmWave bands for the measurements in the engine bay. Sparse channels can be observed at sub-THz bands in the engine bay scenarios. Channel spatial profiles in the passenger cabin of both the van and the car are obtained by the directional scan sounding (DSS) scheme for three bands. We compare the power-angle delay profiles (PADPs) measured at different frequency bands in two line-of-sight (LOS) scenarios and one non-LOS (NLOS) scenario. Some major multipath components (MPCs) can be identified in all frequency bands and their trajectories are traced based on the geometry of the vehicles. The angular spread of arrival is also calculated for three scenarios. The analysis of channel characteristics in this article can enhance our understanding of in-vehicle channels and foster the evolution of in-vehicle wireless networks.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 5","pages":"3191-3201"},"PeriodicalIF":4.6,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143925076","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 Dual-Polarimetric High Range Resolution Profile Modulation Method Based on Time-Modulated APCM 一种基于时间调制APCM的双偏振高距离分辨率像调制方法

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-13 DOI: 10.1109/TAP.2025.3526901

Ran Sui;Junjie Wang;Guang Sun;Zhiming Xu;Dejun Feng

{"title":"A Dual-Polarimetric High Range Resolution Profile Modulation Method Based on Time-Modulated APCM","authors":"Ran Sui;Junjie Wang;Guang Sun;Zhiming Xu;Dejun Feng","doi":"10.1109/TAP.2025.3526901","DOIUrl":"https://doi.org/10.1109/TAP.2025.3526901","url":null,"abstract":"The discovery of electromagnetic (EM) metasurfaces has significantly advanced the free manipulation of EM waves. Furthermore, the harmonic phenomena based on time-modulated metasurfaces (TMMs) have received much attention in communication and radar detection applications, which can reduce the efficiency of radar target detection. However, the existing research on time-varying metasurface has neglected its potential to manipulate the scattering characteristics of polarized radar targets. When a linear polarization wave is incident on a metasurface, it will be reflected into two orthogonal polarization states of EM waves, thus directly affecting the polarized scattering of the target. Active polarization conversion metasurfaces (APCMs) can manipulate the polarization of EM waves, aligning well with polarimetric radar. In this work, a dual-polarization radar target feature manipulation (Pol-TFM) method based on APCM is proposed, which enables manipulation of the harmonic and energy distribution of radar echo signals in multiple polarization channels. Through this processing, virtual targets generated by harmonic effects become observable on the dual-polarized high-resolution range profile (HRRP). This method also allows for the position manipulation of the virtual targets. Finally, echo signal experiments are conducted in dual-polarimetric channels to verify the effectiveness of the proposed method.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 2","pages":"1007-1017"},"PeriodicalIF":4.6,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361291","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

Full-Duplex Wideband Digital Array With Beamforming and Application to Sum/Difference Pattern Retrodirectivity 带波束形成的全双工宽带数字阵列及其在和/差方向图反向性中的应用

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-13 DOI: 10.1109/TAP.2025.3526894

Alexander T. Don;Maksim V. Kuznetcov;Zain Shafiq;Ronnie Frith;Symon K. Podilchak

{"title":"Full-Duplex Wideband Digital Array With Beamforming and Application to Sum/Difference Pattern Retrodirectivity","authors":"Alexander T. Don;Maksim V. Kuznetcov;Zain Shafiq;Ronnie Frith;Symon K. Podilchak","doi":"10.1109/TAP.2025.3526894","DOIUrl":"https://doi.org/10.1109/TAP.2025.3526894","url":null,"abstract":"A fully digital antenna array is developed and experimentally tested for beamforming, null generation, and in-band full duplex (IBFD) retrodirective beam-steering. The supporting S-band array is compact and comprises co-located transmit and receive stacked patch elements with isolation values of 40 dB. In addition, each element is fed using H-shaped slots and dual-differential integrated couplers and this offers dual-polarized operation as required, while a synchronized software-defined radio (SDR) transceiver network was programmed to apply the needed complex weights and phase conjugation at baseband. Moreover, the system shows proof-of-concept by forming sum and difference patterns and also demonstrates self-steering due to an interrogating signal from the far-field. Results show that the digital retrodirective antenna array (RDA) system can achieve a competitive −5-dB monostatic angular scan range of ±47°, needs no frequency offset to operate, and, offers a 6% matching impedance bandwidth (BW). These wideband features make the RDA capable of common, or reconfigurable, carrier offsets for the incoming and re-radiated beams, and this has also been experimentally demonstrated. To the best knowledge of the authors, no similar digital IBFD antenna, RDA system has been designed, programmed, and tested.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 3","pages":"1858-1863"},"PeriodicalIF":4.6,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553499","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

Design of Dual-Band Antenna for Metal-Bezel Smartwatches With Negligible Wrist Effects Utilizing Coupled-Feeding Technique 基于耦合馈入技术的腕部效应可忽略的金属表圈智能手表双波段天线设计

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-13 DOI: 10.1109/TAP.2025.3526897

Jinrui Zuo;Yan Wang;Feng Xu

{"title":"Design of Dual-Band Antenna for Metal-Bezel Smartwatches With Negligible Wrist Effects Utilizing Coupled-Feeding Technique","authors":"Jinrui Zuo;Yan Wang;Feng Xu","doi":"10.1109/TAP.2025.3526897","DOIUrl":"https://doi.org/10.1109/TAP.2025.3526897","url":null,"abstract":"Since smartwatches are usually worn on the human wrist, the impact of the wrist on antenna performance (frequency shift and efficiency reduction) is crucial for practical applications. In this communication, a dual-band antenna for metal-bezel smartwatches, which is almost unaffected by the human wrist, is proposed and studied. Unlike traditional smartwatch antenna designs, which directly excite the metal bezel, this work employs a coupled-feeding technique, where the metal bezel is coupled-fed by the coupling metal. The proposed coupled-feeding technique significantly enhances the vertical electric field, making the impact of the wrist on the antenna performance negligible. A prototype demonstrates that, with the coupled-feeding technique, the frequency shift is nearly 0 MHz in the both GPS L1 and Bluetooth (BT) bands. Meanwhile, the efficiency reduction is just 0.3 dB in the GPS L1 band (from −3.8 to −4.1 dB) and 0.2 dB in the BT band (from −3.6 to −3.8 dB). Additionally, with the coupled-feeding technique, the proposed antenna consistently demonstrates stable and reliable performance, whether worn on the left or right wrist or with different coupled-feeding positions. In summary, the proposed antenna, utilizing the coupled-feeding technique, demonstrates slight frequency shift, exceptionally low efficiency degradation, and excellent performance consistency, making it highly promising for practical applications.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 5","pages":"3400-3405"},"PeriodicalIF":4.6,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918819","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

Efficiency Analysis of Parasitic Common and Differential Modes for Ultrathin Circularly Polarized Microstrip Antenna 超薄圆极化微带天线寄生共模和差模效率分析

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-13 DOI: 10.1109/TAP.2025.3526902

Mingzhe Hu;Yue Li;Yongjian Zhang;Xuan Liu;Pengfei Wu;Hanyang Wang

{"title":"Efficiency Analysis of Parasitic Common and Differential Modes for Ultrathin Circularly Polarized Microstrip Antenna","authors":"Mingzhe Hu;Yue Li;Yongjian Zhang;Xuan Liu;Pengfei Wu;Hanyang Wang","doi":"10.1109/TAP.2025.3526902","DOIUrl":"https://doi.org/10.1109/TAP.2025.3526902","url":null,"abstract":"This article proposes a comprehensive analysis on the efficiency performance of an ultrathin circularly polarized (CP) microstrip antenna. For ultrathin antennas with intrinsic narrow bandwidth, traditional parasitic-loading methods for bandwidth enhancement encounter significant in-band efficiency reduction, which is named as “efficiency dip,” due to the strong differential coupling between main and parasitic resonators. To address this issue, we propose a feasible structure of parasitic resonator pair. In this case, the common and differential modes (DMs) of the resonator pair are excited simultaneously, with the parasitic common mode (CM) to eliminate the efficiency dip. Inevitably, another efficiency dip appears due to the parasitic DM, but is located out of band without bandwidth deterioration. A prototype is fabricated and tested, showing a CP bandwidth of 3.5% with an extremely low profile of <inline-formula> <tex-math>$0.012~lambda _{0}$ </tex-math></inline-formula> (<inline-formula> <tex-math>$lambda _{0}$ </tex-math></inline-formula> is the free-space wavelength at the center frequency). The final efficiency is over 68% across the band. This article provides a guideline for designing wideband CP antennas with ultrathin profile and small area, for example, for mobile terminals.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 5","pages":"2908-2917"},"PeriodicalIF":4.6,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929778","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

Metal-Frame Slot Antenna With a Small Ground Clearance for the Wi-Fi 6E Operation in Laptop Applications 金属框架槽天线具有小离地间隙，用于笔记本电脑应用中的Wi-Fi 6E操作

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-13 DOI: 10.1109/TAP.2025.3526895

Jiahao Wu;Guo-Min Yang;Yan Wang;Na Yan;Ya-Qiu Jin

引用次数: 0

RCS Reconfiguration of an Antenna Array Based on the 1-bit Reconfigurable Load Impedance 基于1位可重构负载阻抗的天线阵列RCS重构

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-13 DOI: 10.1109/TAP.2025.3526909

Binchao Zhang;Fan Yang;Shenheng Xu;Cheng Jin

{"title":"RCS Reconfiguration of an Antenna Array Based on the 1-bit Reconfigurable Load Impedance","authors":"Binchao Zhang;Fan Yang;Shenheng Xu;Cheng Jin","doi":"10.1109/TAP.2025.3526909","DOIUrl":"https://doi.org/10.1109/TAP.2025.3526909","url":null,"abstract":"The radar cross section (RCS) reconfiguration of the antenna is necessary for low-observable platforms. Thus, this article studies the RCS control of the antenna array based on the 1-bit reconfigurable load impedance. First, the tuning method of the antenna scattering field is analyzed theoretically. It is derived that the amplitude and phase of the antenna’s scattering field can be tuned by changing its load impedance. Subsequently, PIN diodes are implemented to control the load impedance. When the PIN diode switches, the antenna’s scattering field meets the condition of equal amplitude and a phase difference of 180°. As a result, the RCS of the antenna array can be controlled. Moreover, by introducing an additional prephase, the inherent symmetric dual-beam issue of 1-bit reconfigurable structures is overcome, achieving single-beam scanning of the scattering field. Finally, a <inline-formula> <tex-math>$1 times 16$ </tex-math></inline-formula> linear antenna array is designed and fabricated, which operates at 6 GHz with a radiation gain of 16.3 dBi. The scattering beams of the designed array can scan within ±45°, which significantly reduces the in-band and copolarized monostatic RCS. The measured results align well with the simulated ones.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 5","pages":"2918-2926"},"PeriodicalIF":4.6,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929745","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