IEEE Antennas and Wireless Propagation Letters最新文献_第2页

Multifunctional Static Metagratings Using Metallic Scatterers With Strong Spatial Dispersion 具有强空间色散的金属散射体的多功能静态超聚合器

IF 4.8 2区计算机科学

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-09-02 DOI: 10.1109/LAWP.2025.3605301

Peyman Abdipour;George V. Eleftheriades

引用次数: 0

Evaluation of Spiral Monopole Antenna Arrays for Human Brain Imaging at 7 Tesla 螺旋单极天线阵列用于7特斯拉人脑成像的评价

IF 4.8 2区计算机科学

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-09-01 DOI: 10.1109/LAWP.2025.3604517

Myung Kyun Woo

{"title":"Evaluation of Spiral Monopole Antenna Arrays for Human Brain Imaging at 7 Tesla","authors":"Myung Kyun Woo","doi":"10.1109/LAWP.2025.3604517","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3604517","url":null,"abstract":"Ultra-high field (UHF, ≥7 Tesla (T)) magnetic resonance imaging (MRI) is widely adopted for its ability to achieve high signal-to-noise ratio (SNR) for high-resolution imaging. However, the limitation of UHF is its nonuniform field distribution, which poses a challenge for clinical applications. Based on the evaluations of monopole antenna arrays (MAs), we have acquired uniform human brain images with high transmit and receive performance. However, they have limitations in terms of relatively longitudinal short coverage for human whole-brain imaging. To address this, we have developed a newly designed MA with floating shields. This design shows superior performance in terms of the extension of the longitudinal coverage. However, it still does not provide sufficient uniform images for clinical usages. Therefore, we aim to improve field uniformity by designing and fabricating monopole antennas with spiral antenna concept. In this study, we developed three types of 8-channel MAs: a conventional MA, an extended spiral monopole array (ESMA) without individual shielding, and an ESMA with individual shielding (ESMAS). Experimental evaluations confirmed the superior performance of the ESMAS, producing more uniform transmit and receive profiles. High-resolution brain imaging was successfully obtained at 7 T using the ESMAS.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 10","pages":"3774-3778"},"PeriodicalIF":4.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11145937","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145255973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Compact Single-Layer Wideband CP Antenna Array With Stable Radiation and Filtering Performance Using Patch Resonator and SIW Cavity 采用贴片谐振腔和SIW腔的紧凑单层宽带CP天线阵列，具有稳定的辐射和滤波性能

IF 4.8 2区计算机科学

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-09-01 DOI: 10.1109/LAWP.2025.3605013

Qianwen Liu;Huan Yan;Lei Zhu;Yiming Tang;Yun-peng Lyu;Feng Huang

{"title":"Compact Single-Layer Wideband CP Antenna Array With Stable Radiation and Filtering Performance Using Patch Resonator and SIW Cavity","authors":"Qianwen Liu;Huan Yan;Lei Zhu;Yiming Tang;Yun-peng Lyu;Feng Huang","doi":"10.1109/LAWP.2025.3605013","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3605013","url":null,"abstract":"In this letter, a new design concept to enhance the bandwidth and out-of-band suppression of the circularly polarized (CP) patch array antenna is proposed without requiring increased size or complicated structure. Based on the similarities in the processing technique and resonant characteristics between the patch resonator and substrate-integrated-waveguide cavity, the two types of resonators are integrated to excite two pairs of orthogonal degenerate modes, which have nearby frequencies and exhibit similar radiation performance. These four radiative modes facilitate significant improvement of both the impedance and gain bandwidths. Meanwhile, two CP axial ratio (AR) poles are produced, thus effectively enhancing the CP bandwidth. Besides, the out-of-band suppression level is enhanced with a radiation null appearing at the upper stopband. To clearly reveal the proposed broadband concept, two array antennas with the scales of 1 × 2 and 2 × 2 are constructed and discussed. Both prototypes demonstrate similar performance improvement. Specifically, the 2 × 2 array achieves an AR bandwidth of 5.94% along with the stable broadside gain of 13.81 dBi to 14.23 dBi. Compared to the traditional patch antenna array, the bandwidth is approximately 3.12 times wider while radiation performance and structural advantages are fully preserved.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 10","pages":"3779-3783"},"PeriodicalIF":4.8,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145236634","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

Ultrawideband Low-Profile Circularly Polarized Cross-Dipole Antenna With Hybrid AMC Reflector 混合AMC反射面超宽带低轮廓圆极化交叉偶极子天线

IF 4.8 2区计算机科学

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-07-25 DOI: 10.1109/LAWP.2025.3588261

Zhuozhu Chen;Jinwei Cheng;Sha Xu;Wensong Wang

{"title":"Ultrawideband Low-Profile Circularly Polarized Cross-Dipole Antenna With Hybrid AMC Reflector","authors":"Zhuozhu Chen;Jinwei Cheng;Sha Xu;Wensong Wang","doi":"10.1109/LAWP.2025.3588261","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3588261","url":null,"abstract":"In this letter, an ultrawideband low-profile circularly polarized (CP) antenna with asymmetric cross-dipoles, parasitic patches, and artificial magnetic conductor (AMC) is proposed. A vacant-quarter ring connects orthogonal dipole arms to introduce the required 90° phase difference for generating CP radiation. To reduce the profile of the antenna, an AMC reflector is positioned beneath the radiator. The AMC reflector consists of hybrid metallic patterns printed on a substrate, where two different types of unit cells are arranged in the center and around the periphery separately to expand the in-phase reflection bandwidth. Additionally, metallic strips are added around the edge of the ground to improve the axial ratio and radiation pattern at lower frequencies. Measured results indicate that the impedance bandwidth and the axial ratio bandwidth of the antenna are 1.51 GHz to 5.13 GHz (109%) and 1.54 GHz to 3.57 GHz (79.5%), respectively. The antenna gains maintain 6.3 dBic to 8.3 dBic within the whole operating bandwidth. Furthermore, the antenna features a low profile of 0.13<italic>λ<sub>L</sub></i> corresponding to the lowest operating frequency.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 9","pages":"3278-3282"},"PeriodicalIF":4.8,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998233","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

A Steerable Dual-Polarized Monopulse Reflector Antenna With Gap-Waveguide Adaptive Phase Shifters for E-Band Backhaul 一种用于e波段回程的带间隙波导自适应移相器的可操纵双偏振单脉冲反射天线

IF 4.8 2区计算机科学

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-07-14 DOI: 10.1109/LAWP.2025.3588191

Enlin Wang;Oskar Talcoth;Lars Manholm;Ashraf Uz Zaman;Jian Yang

{"title":"A Steerable Dual-Polarized Monopulse Reflector Antenna With Gap-Waveguide Adaptive Phase Shifters for E-Band Backhaul","authors":"Enlin Wang;Oskar Talcoth;Lars Manholm;Ashraf Uz Zaman;Jian Yang","doi":"10.1109/LAWP.2025.3588191","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3588191","url":null,"abstract":"This letter presents an E-band monopulse feed with broadband gap-waveguide adaptive phase shifters for Gregorian reflector antennas tailored for 5G backhaul communications. The monopulse functionality is achieved using a gap-waveguide-based <inline-formula><tex-math>$2times 2$</tex-math></inline-formula> step-horn-array feed with a feeding network comprising 3 dB couplers and adaptive phase shifters. The antenna achieves an ultrahigh-gain of 50 dBi through integration of the feed with a Gregorian reflector antenna and employs beamsteering by offsetting the feed from the subreflector focus. However, the feed offsetting degrades the null depth in difference (<inline-formula><tex-math>$Delta$</tex-math></inline-formula>) patterns. Therefore, a new phase compensation strategy is proposed, involving a codesign of adaptive phase shifters with the offset by using a numerical phase compensation function quantified in this work based on simulation data through GRASP and CST. The fabricated antenna demonstrates reflection coefficients below <inline-formula><tex-math>$-10$</tex-math></inline-formula> dB for both polarizations over 71 GHz to 86 GHz. The measured radiation patterns and gains align closely with the simulated results. The system achieves a maximum gain of 50.48 dBi, with beamsteering within <inline-formula><tex-math>$pm 2^circ$</tex-math></inline-formula> from boresight and a maximum steering loss of 0.96 dB. The null depth of all <inline-formula><tex-math>$Delta$</tex-math></inline-formula>-beams is maintained above 20 dB. These results highlight the significant potential of this antenna for 5G backhaul communications.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 9","pages":"3268-3272"},"PeriodicalIF":4.8,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998008","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

Miniaturized MIMO Antenna Design Based on Mode Cancellation Method for 5G Mobile Terminals 基于模式对消方法的5G移动终端小型化MIMO天线设计

IF 4.8 2区计算机科学

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-07-10 DOI: 10.1109/LAWP.2025.3587350

Yifan Lu;Changjiang Deng;Yiming Fan;Rongrong Dong

引用次数: 0

3-D Beam-Steering 2 × 2 Array Antenna With Tunable Frequency Based on the Phase Difference Between Patches 基于贴片相位差的可调频率三维波束控制2 × 2阵列天线

IF 4.8 2区计算机科学

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-07-10 DOI: 10.1109/LAWP.2025.3586936

Y. Cho;Y. Sung

引用次数: 0

Investigation on Bandpass Frequency Selective Surface Based on Aluminum Honeycomb Cavity 基于铝蜂窝腔的带通选频面研究

IF 4.8 2区计算机科学

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-07-10 DOI: 10.1109/LAWP.2025.3587792

Na Li;Yingguo Jiang;Ye Han

引用次数: 0

A Low-Profile Dual-Band Circularly Polarized Shared-Aperture Grid-Patch/Fabry–Perot Antenna for CubeSat Applications 用于立方体卫星的低轮廓双频圆极化共享孔径网格-贴片/法布里-珀罗天线

IF 4.8 2区计算机科学

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-07-10 DOI: 10.1109/LAWP.2025.3587295

Minh Quang Nguyen;Khac Kiem Nguyen;Son Xuat Ta

{"title":"A Low-Profile Dual-Band Circularly Polarized Shared-Aperture Grid-Patch/Fabry–Perot Antenna for CubeSat Applications","authors":"Minh Quang Nguyen;Khac Kiem Nguyen;Son Xuat Ta","doi":"10.1109/LAWP.2025.3587295","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3587295","url":null,"abstract":"A dual-band circularly polarized (CP) shared-aperture grid-patch/Fabry–Perot antenna with a low profile is presented for CubeSat applications. A conducting grid layer is incorporated with a periodic metasurface to act as a partially reflective surface (PRS) of the low-profile Fabry–Perot resonant cavity. A slotted circular patch is used as the feed of the Fabry–Perot antenna to produce high-gain CP radiation in the <inline-formula><tex-math>$X$</tex-math></inline-formula> band. The grid layer of the PRS is reused as a patch radiator in the <inline-formula><tex-math>$L$</tex-math></inline-formula> band, which is designed with truncated corners to generate CP radiation. The proposed antenna is implemented on a three-layer substrate without air-gap for a sturdy structure. A fabricated prototype with overall size of <inline-formula><tex-math>$text{98 mm} times text{98 mm} times text{3.94}$</tex-math></inline-formula> mm achieves right-hand CP radiation within 1.230 GHz to 1.242 GHz and 8.0 GHz to 8.4 GHz with an isolation <inline-formula><tex-math>$ge$</tex-math></inline-formula> 20 dB. Noting that the frequencies and polarization of the two bands can be easily adjusted by using the same design concept.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 9","pages":"3243-3247"},"PeriodicalIF":4.8,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998100","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

A Miniaturized Metasurface Sensor Using Spoof Electric Localized Surface Plasmons 利用欺骗电局域表面等离子体的小型化超表面传感器

IF 4.8 2区计算机科学

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-07-10 DOI: 10.1109/LAWP.2025.3587722

Ming-Ming Chen;Wen-Kang Wu;Qi Zheng;Zhen-Xing Xia;Xue-Xia Yang;Steven Gao

{"title":"A Miniaturized Metasurface Sensor Using Spoof Electric Localized Surface Plasmons","authors":"Ming-Ming Chen;Wen-Kang Wu;Qi Zheng;Zhen-Xing Xia;Xue-Xia Yang;Steven Gao","doi":"10.1109/LAWP.2025.3587722","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3587722","url":null,"abstract":"A miniaturized metasurface sensor with high sensitivity and polarization-insensitive characteristics based on electromagnetically induced transparency (EIT) is presented. The unit cell of the sensor consists of a spiral structure and a square metal frame, which generates the EIT. Experimental and calculated transmission spectra are in good agreement with the simulated results. Analysis of the electric field distributions, magnetic field distributions, and surface current distributions reveals that the EIT is primarily caused by spoof electric localized surface plasmons and electric dipole interactions, further supported by multipole scattering theory. The proposed sensor retains consistent sensitivity under oblique incidence conditions from 0° to 60° while maintaining polarization angle independence. The metasurface sensor achieves a measured sensitivity of 3.7 GHz/RIU, closely matching the simulated sensitivity of 4 GHz/RIU, highlighting its superior sensing performance. This work provides a novel approach for metasurface sensors and demonstrates significant potential for applications in detection.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 9","pages":"3258-3262"},"PeriodicalIF":4.8,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998112","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