Radio Science最新文献_第6页

Near-field electromagnetic scattering accurate prediction for millimeter-wave and terahertz radar technology 毫米波和太赫兹雷达技术的近场电磁散射精确预测

IF 1.5 4区地球科学

Radio Science Pub Date : 2026-04-01 Epub Date: 2026-03-01 DOI: 10.1029/2025RS008509

Luyin Xiao;Yongjun Xie

{"title":"Near-field electromagnetic scattering accurate prediction for millimeter-wave and terahertz radar technology","authors":"Luyin Xiao;Yongjun Xie","doi":"10.1029/2025RS008509","DOIUrl":"https://doi.org/10.1029/2025RS008509","url":null,"abstract":"Millimeter-wave radar and terahertz radar are increasingly applied in the near-field region. Nearfield scattering characteristics of targets need to be described in the spherical wave propagation model and nonuniform target illumination. A scattering characteristics prediction analytical method based on generalized radar range equation for near-field targets is proposed in this paper. The partial illumination effects of the targets and antenna near-field radiation characteristics are considered in this method. The scattered field of near-field targets is related to distance, target size and antenna radiation pattern. Near-field scattering characteristic of canonical targets (plate at 24 GHz and cylinder at 240 GHz) and a realistic vehicle model are calculated and validated by full-wave electromagnetic simulations using software Ansys HFSS and published literature, achieving deviations below 1 dB. The proposed approach provides both physical insight and fast evaluation compared with numerical surface-integration algorithms and full-wave simulation method. It can be applied into the high-resolution near-field imaging, short-range sensing and 6G terahertz systems.","PeriodicalId":49638,"journal":{"name":"Radio Science","volume":"61 4","pages":"1-8"},"PeriodicalIF":1.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Three-dimensional OAM-InSAR imaging algorithm based on the ωK method 基于ωK法的三维OAM-InSAR成像算法

IF 1.5 4区地球科学

Radio Science Pub Date : 2026-04-01 Epub Date: 2026-03-01 DOI: 10.1029/2025RS008443

Yueyue Han;Lingji Xu;Fan Feng

引用次数: 0

Design analysis of a seven-level active neutral point clamped (ANPC) inverter based on switched technique 基于开关技术的七电平有源中性点箝位（ANPC）逆变器设计分析

IF 1.5 4区地球科学

Radio Science Pub Date : 2026-04-01 Epub Date: 2026-03-01 DOI: 10.1029/2025RS008450

Shujaat Ali;Yanbo Che;Sathesh Ammaiappan;Mubashar Javed;Yazeed Mohammad Qasaymeh;Mohammad Alibakhshikenari

{"title":"Design analysis of a seven-level active neutral point clamped (ANPC) inverter based on switched technique","authors":"Shujaat Ali;Yanbo Che;Sathesh Ammaiappan;Mubashar Javed;Yazeed Mohammad Qasaymeh;Mohammad Alibakhshikenari","doi":"10.1029/2025RS008450","DOIUrl":"https://doi.org/10.1029/2025RS008450","url":null,"abstract":"A novel switch-based Active-Neutral-Clamped (ANPC) inverter for low DC-link voltage is presented in this paper. The proposed ANPC topology minimizes switches and achieves 1.5 times better voltage gain than standard inverters. The main objective of this design is to reduce active switches in the inverter to increase system efficiency. A Flying Capacitor (FC) with self-voltage balancing makes this inverter unique. This flying capacitor enables the inverter to produce a 7-L output voltage. This study comprehensively analyses how it performs compared to existing technologies. The theoretical aspects of this proposed design have experienced thorough validation through a combination of experimental and simulation results, ensuring its efficacy and practical feasibility. The benchmark comparison further indicates reduced standing voltage requirement (TSV X Vin = 6.5) and a rated efficiency of 97.5%, supporting improved cost, control simplicity, and loss performance. Simulation and experimental results demonstrate the feasibility and effectiveness of the topology in terms of voltage balance, load adaptability, and modulation index adjustment. Simulation tests reveal stable voltage levels and current waveforms under different load conditions, with the peak output voltage reaching 1.5 times the initial input voltage. Experiments on a laboratory prototype validate the topology's dynamic response and self-balancing capability, showcasing its practical viability. The proposed 7L-ANPC topology offers a promising solution for enhancing power conversion efficiency and reliability in diverse applications.","PeriodicalId":49638,"journal":{"name":"Radio Science","volume":"61 4","pages":"1-18"},"PeriodicalIF":1.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High gain array antenna for radio frequency energy harvesting in Internet-of-Things applications 用于物联网应用中射频能量采集的高增益阵列天线

IF 1.5 4区地球科学

Radio Science Pub Date : 2026-04-01 Epub Date: 2026-03-01 DOI: 10.1029/2025RS008472

Muhammad Saleem;William O. F. Carvalho;Muhammad Irfan

{"title":"High gain array antenna for radio frequency energy harvesting in Internet-of-Things applications","authors":"Muhammad Saleem;William O. F. Carvalho;Muhammad Irfan","doi":"10.1029/2025RS008472","DOIUrl":"https://doi.org/10.1029/2025RS008472","url":null,"abstract":"Wireless sensor networks are increasingly deployed in Internet of Things (IoT) applications, demanding self-powered solutions to overcome the limitations of conventional batteries. Radio frequency energy harvesting (RFEH) offers a practical means to scavenge ambient RF power from ubiquitous sources such as mobile base stations, enabling sustainable operation of remote or inaccessible devices. This work presents a complete RFEH system integrating a 2 × 2 microstrip patch antenna array, impedance matching network, and rectifier circuit, optimized for the 2.1 GHz 3G downlink band. Full-wave simulations predict a resonance at 2.1 GHz, realized gain of 5.1 dBi, 60 MHz bandwidth, and half-power beamwidth of 34°. Circuit-level simulations indicate a rectifier DC output of 3.575 V under nominal excitation. Experimental measurements in an anechoic chamber confirm the predicted antenna performance and demonstrate a 706 mV<inf>RMS</inf> output under ambient 3G exposure, sufficient to illuminate an LED load. The discrepancy between simulation and measurement is attributed to lower ambient power levels, propagation losses, and rectifier nonlinearity. In contrast to prior RFEH studies centered on single-element rectennas, multi-band harvesting circuits, or controlled-source demonstrations, the present work emphasizes a complete 2.1 GHz UMTS harvesting prototype based on a compact 2 × 2 patch array. The measured antenna performance and the ambient 3G experiment, which produced 706 mV<inf>RMS</inf> and illuminated an LED, confirm the feasibility of system-level RFEH for low-power IoT nodes without a dedicated RF power transmitter.","PeriodicalId":49638,"journal":{"name":"Radio Science","volume":"61 4","pages":"1-12"},"PeriodicalIF":1.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrating quantum technology with wireless NoC: A review of architectures, protocols, and future directions 集成量子技术与无线NoC：架构、协议和未来方向的回顾

IF 1.5 4区地球科学

Radio Science Pub Date : 2026-04-01 Epub Date: 2026-03-01 DOI: 10.1029/2025RS008411

Anupama Sindgi;Asha Mahadeva;Raghavendra Yellakur Manjunath;Vanitha G. Naik

{"title":"Integrating quantum technology with wireless NoC: A review of architectures, protocols, and future directions","authors":"Anupama Sindgi;Asha Mahadeva;Raghavendra Yellakur Manjunath;Vanitha G. Naik","doi":"10.1029/2025RS008411","DOIUrl":"https://doi.org/10.1029/2025RS008411","url":null,"abstract":"The convergence of Wireless Network-on-Chip (WiNoC) and quantum computing represents a significant frontier for advancing next-generation many-core systems. WiNoC enables efficient on-chip communication through single-hop wireless links, thereby reducing latency and power consumption compared to conventional wired Network-on-Chip. Despite these advantages, challenges such as congestion, security vulnerabilities, and energy inefficiencies persist. This review provides a comprehensive analysis of how quantum principles such as superposition, entanglement, and Quantum Key Distribution can enhance WiNoC scalability, security, and performance. Recent developments in WiNoC design, quantum communication techniques, channel modeling, optimization algorithms, and cryptographic frameworks are examined in detail. The discussion further explores emerging trends in quantum-assisted architectures that may leverage quantum computing to improve data throughput and secure transmission. Key research gaps are identified, including the limited scalability of quantum algorithms, the difficulty of managing dynamic traffic patterns, and the constraints of integrating quantum components within chip environments. Finally, the review outlines future research directions focusing on hybrid classical-quantum architectures, Artificial Intelligence-driven traffic prediction mechanisms, and the establishment of standardized protocols for quantum-classical communication. Collectively, these advancements are expected to drive the evolution of secure, energy-efficient, and scalable computing platforms.","PeriodicalId":49638,"journal":{"name":"Radio Science","volume":"61 4","pages":"1-23"},"PeriodicalIF":1.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Front matters 前面问题

IF 1.5 4区地球科学

Radio Science Pub Date : 2026-04-01 Epub Date: 2026-03-01 DOI: 10.1029/rds.70047

引用次数: 0

Periodic characteristics of surface electromagnetic wave propagation in the South China sea 南海表面电磁波传播的周期特征

IF 1.5 4区地球科学

Radio Science Pub Date : 2026-04-01 Epub Date: 2026-03-01 DOI: 10.1029/2025RS008295

Yinhe Cheng;Xindi Sun;Jiaxuan Yang;Zhiwei You;Wenli Qiao;Guozhen Zha;Shuwen Wang;Kunde Yang

{"title":"Periodic characteristics of surface electromagnetic wave propagation in the South China sea","authors":"Yinhe Cheng;Xindi Sun;Jiaxuan Yang;Zhiwei You;Wenli Qiao;Guozhen Zha;Shuwen Wang;Kunde Yang","doi":"10.1029/2025RS008295","DOIUrl":"https://doi.org/10.1029/2025RS008295","url":null,"abstract":"The refractive environment of the South China Sea (SCS) is currently a prominent research focus due to its significant impact on electromagnetic wave (EMW) propagation, particularly for ship-borne radar and communication systems. Based on the Global Positioning System sounding data collected during the summer monsoon period in 1998, the surface refractive conditions of the SCS were analyzed, and the relationship between these conditions and various meteorological factors was further explored. The analysis reveals a pronounced daily cycle in the surface refractive environment, closely linked to fluctuations in temperature and humidity. The modified refractivity exhibits a one-day periodicity, with the southern SCS showing a higher consistency in surface duct occurrence (96.1% probability) compared to the northern region (49.7% probability). Wind direction, particularly westerly winds, plays a significant role in enhancing surface duct strength. Numerical simulations using the Parabolic Equation method demonstrate that surface ducts significantly extend the detection range of EMW, with path loss remaining below 150 dB at 150 km under ducting conditions. These findings emphasize the operational significance of surface ducts in the SCS, particularly for over-the-horizon radar detection of low-altitude targets. Understanding the refractive environment in this region is essential for optimizing radar and communication system performance in maritime operations.","PeriodicalId":49638,"journal":{"name":"Radio Science","volume":"61 4","pages":"1-18"},"PeriodicalIF":1.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stapler pin FSS embedded fractal antenna for brain tumor detection 钉针FSS嵌入分形天线用于脑肿瘤检测

IF 1.5 4区地球科学

Radio Science Pub Date : 2026-04-01 Epub Date: 2026-03-01 DOI: 10.1029/2025RS008517

T. Aishwarya;Priyanka Das

{"title":"Stapler pin FSS embedded fractal antenna for brain tumor detection","authors":"T. Aishwarya;Priyanka Das","doi":"10.1029/2025RS008517","DOIUrl":"https://doi.org/10.1029/2025RS008517","url":null,"abstract":"In this study, a fractal antenna integrated with a cardboard stapled frequency selective surface (FSS) is designed for broadband operation. The dimensions of the stapler pins used in constructing the FSS control the electromagnetic response of the antenna. Two types of staple pin FSS have been investigated - one with higher dimensions and the other with lower dimensions. The big pin FSS shows strong resonance at 4.97 GHz, while operating from 2.4 to 8.6 GHz with a peak gain of 6.7 dBi at 5 GHz. The small pin FSS exhibits minimum return loss at 7.07 GHz, while operating from 3.4 to 11.5 GHz, with a peak gain of 7 dBi at 5 GHz. The proposed antenna with 1g average SAR lower than 0.1 W/Kg, presents a viable option for biomedical and wearable applications, especially in brain phantom settings in which controlled resonance and wideband operation are crucial. Prototypes of the wearable antenna and FSS have been fabricated and measured. Presence of tumor is predicted from the reconstructed image using confocal and MDAS (Multiply Delay and Sum) algorithm using gradient descent optimisation. The ground penetrating radar (GPR) algorithm has been implemented to detect the depth of the brain tumor.","PeriodicalId":49638,"journal":{"name":"Radio Science","volume":"61 4","pages":"1-23"},"PeriodicalIF":1.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thank you to our 2025 reviewers 感谢我们的2025位审稿人

IF 1.5 4区地球科学

Radio Science Pub Date : 2026-04-01 Epub Date: 2026-03-01 DOI: 10.1029/2026RS008686

Kazuya Kobayashi;Kun-Shan Chen;Sailing He;Sana Salous;Paul Smith;Jothiram Vivekanandan;Kumar Vijay Mishra

引用次数: 0

Ionospheric effects on maximum usable frequency for a cross-auroral and a polar cap HF radio link 电离层对跨极光和极帽高频无线电链路最大可用频率的影响

IF 1.5 4区地球科学

Radio Science Pub Date : 2026-03-01 Epub Date: 2026-06-03 DOI: 10.1029/2025RS008395

T. G. Cameron;K. W. Reiter;R. A. D. Fiori

{"title":"Ionospheric effects on maximum usable frequency for a cross-auroral and a polar cap HF radio link","authors":"T. G. Cameron;K. W. Reiter;R. A. D. Fiori","doi":"10.1029/2025RS008395","DOIUrl":"https://doi.org/10.1029/2025RS008395","url":null,"abstract":"Maximum usable frequency (MUF) is an important indicator of the ability of the ionosphere to support over-the-horizon propagation of high frequency (HF) radio waves. MUF depends on the location of the transmitter and receiver, and the structure of ionospheric electron density. This study explores short- and long-term variations in the MUF for a cross-auroral path and a polar cap path using transmitters and receivers in Canada and Greenland. Signals were transmitted at a range of frequencies multiple times per hour, allowing for changes in the MUF to be inferred by analyzing changes in the maximum received frequency (MRF) at the receiver over time. Apart from the expected diurnal variation in the MRF caused by solar photoionization, both paths exhibit reductions in the MRF likely connected to negative storm effects. This is supported by a superposed epoch analysis which demonstrates a reduction in MRF during geomagnetic storms. The polar cap path is shown to experience larger MRF at times when signals interacted with polar cap patches, as indicated by a simple model of patch formation, >30° magnitude azimuthal signal deflections, and >5 Hz Doppler shifts. The polar cap path also exhibits periods of high MRF consistent with reflection off sporadic-E layers in the polar cap.","PeriodicalId":49638,"journal":{"name":"Radio Science","volume":"61 5","pages":"1-20"},"PeriodicalIF":1.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148146787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0