{"title":"Call for Papers: IEEE Antennas and Propagation Society Acharya Jagadish Chandra Bose Paper Award","authors":"","doi":"10.1109/LAWP.2025.3563755","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3563755","url":null,"abstract":"","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 5","pages":"1298-1299"},"PeriodicalIF":3.7,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10989243","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143913536","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}
{"title":"A Compact and Low-Profile High-Gain Multilayer Vivaldi Antenna Based on Gradient Metasurface Superstrates","authors":"Ababil Hossain;Stephen Pancrazio;Tyler Kelley;Anh-Vu Pham","doi":"10.1109/LAWP.2025.3542315","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3542315","url":null,"abstract":"This letter presents the design, analysis, and implementation of an electrically compact high-gain multilayer Vivaldi antenna. The multilayer antenna comprises gradient metasurface superstrate layers arranged on the top and bottom of a central electrically compact Vivaldi antenna via low-loss polyethylene foam spacers. The overall electrical dimensions of the antenna are <inline-formula><tex-math>$text{0.36}lambda _{0}$</tex-math></inline-formula> × <inline-formula><tex-math>$text{0.29}lambda _{0}$</tex-math></inline-formula> × <inline-formula><tex-math>$text{0.06}lambda _{0}$</tex-math></inline-formula>, covering a bandwidth from 450 MHz to 10 GHz with an average measured forward gain of more than 15 dBi (<inline-formula><tex-math>$lambda _{0}$</tex-math></inline-formula>: free-space wavelength at 450 MHz). The unit pixel dimensions of the gradient metasurface layer have been optimized to achieve a high-flat gain profile within the desired bandwidth of the antenna. The metasurface layers are printed on thin Kapton polyimide boards to minimize the system's weight. The prototyped antenna is extremely low-profile and weighs 182 g, making it ideally suited for lightweight ultrawideband (UWB) applications needing a very high forward gain.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 6","pages":"1537-1541"},"PeriodicalIF":3.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144206094","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}
{"title":"Design and Implementation of a Reconfigurable Transmitarray Employing Varactor-Tuned Huygens Elements for Dynamic Beam Shaping","authors":"Yuan Liu;Hongtao Zhang;Li Deng","doi":"10.1109/LAWP.2025.3542483","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3542483","url":null,"abstract":"Most conventional reconfigurable transmitarrays rely on multilayer frequency-selective surfaces and PIN diodes, limiting transmittance and multibit modulation, which constrains beamforming accuracy and gain enhancement. In this letter, we propose a phase-modulated reconfigurable transmitarray prototype featuring a Huygens element modulated by two varactor diodes to achieve multibit and highly transmissive cell performance, thus enabling a wide range of highly precise beam modulation in transmissive mode. Specifically, the reconfigurable transmitarray board has two varactor diodes inserted into the sliding symmetric dipoles printed on a bilayered dielectric substrate, achieving Huygens resonance with an average transmission amplitude of 0.8 dB and enabling dynamic 2-bit phase compensation. In addition, the derivation and simulation results of the equivalent circuit based on the lattice network demonstrate the design of the tunable Huygens metasurface can change the intensity of Huygens electromagnetic resonance. The fabricated transmitarray prototype provides matched 2-bit phase modulation, with phase states separated by approximately 90° according to measurements in an anechoic chamber. Beam measurements of the prototype show a beam sweep angle of up to 50° corresponding to a 4 dB gain loss, an aperture efficiency of 27.5%, and a 3 dB gain bandwidth of 6.3% from 10.7 GHz to 11.4 GHz.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 6","pages":"1542-1546"},"PeriodicalIF":3.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144206095","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}
{"title":"A Flexible Multifunctional Absorber/Reflector With Wideband and Low-Power Performance","authors":"Xinhua Liang;Zhao-Min Chen;Lin Zhu;Qunsheng Cao","doi":"10.1109/LAWP.2025.3542552","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3542552","url":null,"abstract":"This letter presents a multifunctional flexible absorber/reflector with wideband performance and low power consumption. The proposed unit cell utilizes only two PIN diodes to achieve four distinct functions with low power consumption. By integrating the metal structure of the unit cell with the PIN diode bias lines, the design is simplified. In addition, the physical characteristics of the proposed structure are thoroughly analyzed using equivalent circuit theory, electric field analysis, and surface current distribution, enhancing the understanding of the design mechanisms. The simulation and experimental verification results are in agreement. Four distinct functions are successfully demonstrated within the frequency band of 8.5 GHz to 12.5 GHz, with a maximum power consumption of only 0.078 W.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 6","pages":"1552-1556"},"PeriodicalIF":3.7,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144219611","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}
{"title":"Millimeter-Wave Wide-Angle Beam-Scanning Phased Array Based on Full-Wavelength Slot Antenna Elements","authors":"Jianhong Zhai;Yunfei Cao;Wenjie Feng;Wenquan Che;Quan Xue","doi":"10.1109/LAWP.2025.3542496","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3542496","url":null,"abstract":"The phased array with wide scanning range is significant to increase signal coverage for millimeter-wave communication. In this letter, a millimeter-wave wide-angle beam-scanning phased array based on crossed full-wavelength slot elements is presented. High-gain performance of full-wavelength slot elements are used to improve the array boresight gain. The proposed crossed slot antenna element has a pair of mirror symmetrical radiating full-wavelength slots. The crossed slot is designed with parallel arms to reduce element-to-element distance for the phased array. Furthermore, parasitic slots are loaded in the vicinity of outer elements of the array to increase the element beamwidth. Due to small element spacing and wide-beam characteristic of outer elements, the beam-scanning angle of the millimeter-wave array is enhanced substantially. As a result, simulated and measured results show that the proposed 1 × 8 phased array has scanning angles of ±80° with 4 dB scan loss in 26.0 GHz to 30.0 GHz. Compared with other related works, the proposed array has wider beam-scanning range with high gain and compact size.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 6","pages":"1547-1551"},"PeriodicalIF":3.7,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144219797","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}
{"title":"Design of Efficient Smartwatch Antenna by Exploring Monopole Mode","authors":"Wenrui Zheng;Tian Xi Feng;Hui Li","doi":"10.1109/LAWP.2025.3542083","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3542083","url":null,"abstract":"Designing an efficient low-band (below 1 GHz) antenna in smartwatches with metal frames has been challenging due to the inefficient radiation from the slot formed by the ground plane and metal frame. In this letter, a practical antenna configuration is proposed for the smartwatch to provide more efficient radiation at the low-band. By analyzing different radiating modes of the platform, it has been found that modifications on the inherent flexible printed circuit (FPC) in the smartwatch can guide the field towards a more efficient distribution, thereby enhancing the radiation efficiency in user scenarios. Seven fundamental models, along with their corresponding radiation efficiency, electric field distributions, and radiation patterns, are thoroughly examined to support the study. As a result, a larger and more protruding FPC significantly improves low-band antenna efficiency by around 5 dB, without any change in antenna itself and the surroundings. Prototypes were fabricated to validate the findings, with measured results agreeing well with the simulated ones.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 6","pages":"1522-1526"},"PeriodicalIF":3.7,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144206103","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}