{"title":"A Novel Millimeter-Wave Single-Fed Circularly Polarized ME-Dipole Antenna With Self-Decoupling Capability and Wide-Angle Scanning Performance","authors":"Ruo Lan Wen;Yong Mei Pan;Yu Leng Wu","doi":"10.1109/LAWP.2026.3714937","DOIUrl":"https://doi.org/10.1109/LAWP.2026.3714937","url":null,"abstract":"In the design of circularly polarized (CP) antenna phased arrays, achieving wide-angle scanning while maintaining high polarization purity remains a key challenge. This letter presents a novel millimeter-wave (mm-wave), single-fed CP magneto-electric dipole (ME-dipole) antenna. By asymmetrically arranging the magnetic dipole vias and incorporating a chamfered structure in the planar electric dipole, the proposed single-fed antenna not only achieves a wide 3 dB axial ratio (AR) beamwidth exceeding 183°, but also exhibits an inherent self-decoupling characteristic, providing high port isolation of 42 dB. Furthermore, in the array configuration, the design effectively exploits coupled near-field to broaden the beamwidth of the active element pattern (AEP). A 1 × 8 phased array prototype has been fabricated and tested. The results demonstrate a ±67° beam scanning capability at 26.3 GHz, with AR maintained below 3 dB across the entire scan range, and a gain variation of no more than 2.8 dB. Notably, this performance is achieved without requiring any supplementary decoupling or beam-broadening components, enabling a compact and low-complexity design.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"25 9","pages":"3671-3675"},"PeriodicalIF":4.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148902898","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":"Measurement and Characterization of Dual-Band Vehicle-to-Vehicle Millimeter-Wave Propagation Channels at 60 GHz and 80 GHz","authors":"Radek Zavorka;Tomas Mikulasek;Josef Vychodil;Aniruddha Chandra;Hussein Hammoud;Jaroslaw Wojtun;Jan M. Kelner;Cezary Ziolkowski;Christoph Mecklenbrauker;Alexandr Otahal;Jiri Blumenstein;Ales Prokes","doi":"10.1109/LAWP.2026.3720404","DOIUrl":"https://doi.org/10.1109/LAWP.2026.3720404","url":null,"abstract":"Vehicle-to-vehicle (V2V) communication at millimeter-wave frequencies is a key enabler of high-data-rate and low-latency applications, but it is strongly affected by rapid channel dynamics. This letter presents a measurement-based characterization and modeling of dual-band V2V channels at 60 GHz and 80 GHz in selected scenarios within an urban campus environment. A dual-band channel sounding campaign was conducted using synchronized transmitters and receivers mounted on moving vehicles to capture time-varying channel impulse responses under different mobility conditions. From the measured data, the root-mean-square (rms) delay spread, rms Doppler spread, and estimated <inline-formula><tex-math>$K$</tex-math></inline-formula>-factor were extracted and statistically analyzed. In addition, the correlation distance of the rms delay and Doppler spreads are evaluated for the selected scenarios, and a deterministic two-point characterization of the mean estimated <inline-formula><tex-math>$K$</tex-math></inline-formula>-factor is presented. The results indicate that the rms delay spread remains below 30 ns for most scenarios, while the highest rms Doppler spread reaches 2.5 kHz at 80 GHz in the approaching scenario. Moreover, a broader <inline-formula><tex-math>$K$</tex-math></inline-formula>-factor distribution is observed at 80 GHz, indicating scenario and frequency dependence.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"25 9","pages":"3821-3825"},"PeriodicalIF":4.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148903019","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}
Guo-Ping Gao;Jun-Jie Xia;Xuan Wang;Wen-Di Guo;Yan-Fei Zhang;Bin Hu
{"title":"Dual-Reconfigurable Polarization and Pattern Wearable Antenna","authors":"Guo-Ping Gao;Jun-Jie Xia;Xuan Wang;Wen-Di Guo;Yan-Fei Zhang;Bin Hu","doi":"10.1109/LAWP.2026.3710265","DOIUrl":"https://doi.org/10.1109/LAWP.2026.3710265","url":null,"abstract":"With the development of wearable wireless systems and wireless body area networks, the 3.5 GHz WiMAX band has become critical for body-centric communications, creating an urgent demand for high-performance wearable antennas with multifunctional integration, compact size, and stable on-body performance. This letter proposes a novel polarization- and pattern-reconfigurable wearable antenna for the 3.5 GHz WiMAX band. The antenna consists of two square FR-4 dielectric substrates and three metal layers. It can operate in omnidirectional vertical polarization mode and ±45° directional linear polarization modes. It has a compact size of 0.36λ<sub>0</sub> × 0.36λ<sub>0</sub> × 0.035λ<sub>0</sub>, with a measured peak gain of up to 7.22 dBi. The antenna maintains stable performance near the human body, and its low specific absorption rate values verify its safety in practical wearable applications.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"25 9","pages":"3491-3495"},"PeriodicalIF":4.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148903033","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":"Layered Admittance Reconstruction to Synthesize Broadband FSS Absorbers With Ultralow Reflection","authors":"Nan Wang;Guobin Wan;Qimin Ding;Xin Ma","doi":"10.1109/LAWP.2026.3703046","DOIUrl":"https://doi.org/10.1109/LAWP.2026.3703046","url":null,"abstract":"Synthesizing multilayer resistive frequency-selective-surface (FSS) absorbers under stringent wideband low-reflection requirements remains challenging, as the required contribution of each layer is not straightforward to prescribe. This letter presents a layered admittance reconstruction method, in which a reference Jaumann absorber serves as a target generator, and its input-admittance trajectories at different layer positions are reconstructed in a compact multilayer FSS absorber with thinner spacers. For each reconstruction stage, the ideal complex admittance required by the current FSS layer is determined from the corresponding reference trajectory and the already reconstructed lower substructure. With the lower substructure fixed, the current layer is synthesized against this prescribed admittance target, thereby providing an explicit stagewise organization for multilayer synthesis. A resistive FSS unit cell with enhanced admittance tailoring is developed to realize the prescribed layerwise admittance targets. A four-layer absorber achieves reflection below <inline-formula><tex-math>$-text{20}$</tex-math></inline-formula> dB from 3.47 GHz to 20.38 GHz (141.8%) and below <inline-formula><tex-math>$-text{30}$</tex-math></inline-formula> dB from 4.14 GHz to 12.92 GHz (103.0%) in simulation. Measurements validate a normal-incidence band near <inline-formula><tex-math>$-text{20}$</tex-math></inline-formula> dB from 3.15 to 17 GHz; transverse electric (TE)-polarized measurements further support the angular response under selected conditions.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"25 9","pages":"3466-3470"},"PeriodicalIF":4.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148903035","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":"Low-Profile Ultrawideband Directional Antenna for 5G Indoor Distribution Communication Systems","authors":"Tingting Nie;Qingquan Tan;Kuikui Fan;Guo Qing Luo","doi":"10.1109/LAWP.2026.3715870","DOIUrl":"https://doi.org/10.1109/LAWP.2026.3715870","url":null,"abstract":"This letter presents a low-profile ultrawideband (UWB) directional antenna composed of a folded Vivaldi antenna with a balanced feeding structure. The feeding balun is positioned between two symmetrical Vivaldi antenna metallic surfaces, thereby forming the balanced feeding structure that significantly enhances the radiation performance and suppresses cross-polarization. To reduce the overall profile, the proposed antenna etches slots on the metallic surfaces and bends the arms. In addition, the impedance matching is improved by gradually widening the metallic surfaces on both sides of the tapered slot. Benefiting from the innovative design, the proposed antenna can achieve an ultra-wide impedance bandwidth of 130% (over the frequency range of 0.79 GHz to 3.85 GHz) and a low profile of 0.23λ<sub>L</sub> (λ<sub>L</sub> is the free-space wavelength at the 0.79 GHz). Moreover, the antenna exhibits symmetrical radiation patterns and a stable gain ranging from 6 dBi to 11.6 dBi, with cross-polarization levels lower than −42 dB. Owing to these features and its simple structure, the proposed antenna is a promising candidate for 5G indoor communication applications.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"25 9","pages":"3706-3710"},"PeriodicalIF":4.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148903038","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":"Low Sidelobe Coding Programmable Metasurface Based on Pixel Binning Method","authors":"Yanjun Du;Jianming Huang;Naibo Zhang;Yansong Cui;Weizheng Ren;Rui Liu;Jiayu Zhao","doi":"10.1109/LAWP.2026.3714894","DOIUrl":"https://doi.org/10.1109/LAWP.2026.3714894","url":null,"abstract":"This letter presents a pixel-binning algorithm (PB) for coding programmable metasurfaces. An innovative approach that groups four adjacent meta-elements into a composite unit is introduced, which overcomes the fixed phase constraint of individual meta-elements and enables equivalent amplitude control. Utilizing the proposed method, the number of supported states of the composite unit is significantly enhanced, enabling Chebyshev or Taylor weighting, which is challenging for conventional approaches. Moreover, it possesses the combined advantages of high computational efficiency, superior accuracy, and lightweight computational complexity. The algorithm supports up to 16 independent beams and enables scanning with a maximum off-axis angle of 40°. For the single-beam calculation result, the peak sidelobe level is suppressed from −13.1 dB to −22.4 dB compared to the conventional method, yielding a substantial reduction of 9.3 dB and demonstrating the superior performance of the proposed approach.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"25 9","pages":"3661-3665"},"PeriodicalIF":4.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148903246","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}
Qiaoyu Chen;Gang Zhang;Jin-Dong Zhang;Jun Hu;Deng-Yue Luo;Jiquan Yang;Wenbin Wang;Jiasheng Hong
{"title":"Low-Sidelobe Independently Controllable Multibeamforming Time-Modulated Array With Arbitrary Stepped Waveforms","authors":"Qiaoyu Chen;Gang Zhang;Jin-Dong Zhang;Jun Hu;Deng-Yue Luo;Jiquan Yang;Wenbin Wang;Jiasheng Hong","doi":"10.1109/LAWP.2026.3716283","DOIUrl":"https://doi.org/10.1109/LAWP.2026.3716283","url":null,"abstract":"A low-sidelobe independently controllable multibeamforming time-modulated array (TMA) with arbitrary stepped waveforms is proposed. Unlike conventional multibeam TMAs with constrained harmonic relationships, independent control of beam directions and amplitude weightings is achieved by assigning harmonic complex coefficients at different operating sidebands. The corresponding time-modulated waveforms are then obtained via inverse Fourier transform and quantized into practical stepped waveforms for implementation using in-phase/quadrature (I/Q) time modulators. Only a few global variables, whose number is independent of the array size, are optimized to improve efficiency while satisfying the sideband level (SBL) and sidelobe level (SLL) requirements. Experimental results from an eight-element prototype with far-field calibration verify independently controllable five-beam radiation with a measured SLL of −19.3 dB and an SBL below −30 dB.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"25 9","pages":"3716-3720"},"PeriodicalIF":4.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148902747","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":"Wide-Angle Scanning 1-Bit Modular Arrays Using Measurement-Driven Aperiodic Tiling","authors":"Teng Chang;Hsi-Tseng Chou","doi":"10.1109/LAWP.2026.3721240","DOIUrl":"https://doi.org/10.1109/LAWP.2026.3721240","url":null,"abstract":"This letter proposes a measurement-driven layout-optimization method for large-scale phased arrays using 1-bit phase shifters. While 1-bit quantization simplifies hardware, it introduces severe quantization lobes. Simultaneously, the mandatory assembly gaps in modular architectures create grating lobes. To address this dual challenge, we optimize the nonuniform intersubarray spacing of a 2304-element array (partitioned into 6 × 6 tiles) using a genetic algorithm. The full-array response is synthesized by directly integrating measured 8 × 8 active-subarray kernels into the optimization loop rather than relying only on an idealized element model. Validation results demonstrate that the optimized layout achieves a worst-case sidelobe level of about <inline-formula><tex-math>$-{text{12.24}}$</tex-math></inline-formula> dB over a wide scan range of <inline-formula><tex-math>$pm {text{40}}^circ$</tex-math></inline-formula>, which supports the feasibility of cost-sensitive low Earth orbit terminals.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"25 9","pages":"3836-3840"},"PeriodicalIF":4.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148902750","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 Wideband and Low-Profile Magneto-Electric Dipole Antenna With Slotted Electric Dipole","authors":"Aidong Li;Liangliang Zhao;Hailiang Zhu;Lehu Wen;Chufeng Hu;Huiling Zhao;Xiaoyi Feng","doi":"10.1109/LAWP.2026.3719937","DOIUrl":"https://doi.org/10.1109/LAWP.2026.3719937","url":null,"abstract":"A wideband and low-profile magneto-electric (ME) dipole antenna loaded with a metasurface is proposed. First, broadband operation is achieved by combining the resonances of the ME dipole and the metasurface. Then, to address the issue of gain degradation at high frequency, I-shaped slots are introduced on the electric dipole to adjust the current distribution for suppressing the undesired common-mode resonance. The antenna is fabricated by two substrates with a low-profile of only 0.063λ<sub>center</sub> (λ<sub>center</sub> denotes the wavelength at the center frequency). Both simulation and measurement results confirm that the proposed antenna operates over a frequency range of 10.65 GHz to 16.45 GHz, achieving a bandwidth of 42.8% and a peak gain of 8.7 dBi, covering the majority of X/Ku band. These features make the proposed antenna attractive for conformal antenna and array antenna designs in satellite communication system.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"25 9","pages":"3816-3820"},"PeriodicalIF":4.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148902896","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}