IEEE Journal on Miniaturization for Air and Space Systems最新文献

The Journal of Miniaturized Air and Space Systems

IEEE Journal on Miniaturization for Air and Space Systems Pub Date : 2025-02-24 DOI: 10.1109/JMASS.2025.3539903

引用次数: 0

A Wideband Flat Gain Circularly Polarized Transmitarray Utilizing LP-to-CP Converter for Ka-Band CubeSat Applications

IEEE Journal on Miniaturization for Air and Space Systems Pub Date : 2024-12-23 DOI: 10.1109/JMASS.2024.3521979

Javid Ahmad Ganie;Kushmanda Saurav

{"title":"A Wideband Flat Gain Circularly Polarized Transmitarray Utilizing LP-to-CP Converter for Ka-Band CubeSat Applications","authors":"Javid Ahmad Ganie;Kushmanda Saurav","doi":"10.1109/JMASS.2024.3521979","DOIUrl":"https://doi.org/10.1109/JMASS.2024.3521979","url":null,"abstract":"This article presents a wideband millimeter-wave circularly polarized (CP) transmitarray utilizing the linear-to-circular polarization (LP-to-CP) converter for Ka-band CubeSat applications. The present design aims at combining the multiple band antennas into a single wideband design. The LP-to-CP converter employs a single-layer substrate, providing angular stability up to 50° and achieving a 3-dB axial ratio bandwidth of 29% over the frequency range of 29.5–39.5 GHz. The dimensions of the unit cell are <inline-formula> <tex-math>$0.38lambda times 0.38lambda times 0.15lambda $ </tex-math></inline-formula>, where <inline-formula> <tex-math>$lambda $ </tex-math></inline-formula> corresponds to a frequency of 30 GHz. A wideband 2-bit phase-quantized transmitarray is integrated with the proposed polarization converter, achieving the configuration of CP wideband transmitarray. The CP transmitarray is illuminated by a wideband linearly polarized (LP) Vivaldi antenna. The transmitarray surface consists of polarization rotating elements sized at <inline-formula> <tex-math>$0.3lambda times 0.3lambda times 0.15lambda $ </tex-math></inline-formula> (<inline-formula> <tex-math>$lambda $ </tex-math></inline-formula> corresponding to a frequency of 30 GHz). This CP transmitarray antenna demonstrates an axial ratio and 1-dB gain bandwidth of 27.3% (29.5–39.5 GHz) and 24.5%(30–38.5 GHz), respectively, with a maximum gain of 21.4 dBic. Fabrication and measurements of both the LP-to-CP converter and the integrated CP transmitarray have been done. The simulated outcomes align well with the measured results.","PeriodicalId":100624,"journal":{"name":"IEEE Journal on Miniaturization for Air and Space Systems","volume":"6 1","pages":"44-52"},"PeriodicalIF":0.0,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Assisted Method for Multitemporal SAR Image Registration

IEEE Journal on Miniaturization for Air and Space Systems Pub Date : 2024-12-17 DOI: 10.1109/JMASS.2024.3519174

Zhengyu Chen;Ruya Xiao;Xiaoyuan Gao;Dong Liang;Dezhi Zhang;Jingyi Sun

{"title":"An Assisted Method for Multitemporal SAR Image Registration","authors":"Zhengyu Chen;Ruya Xiao;Xiaoyuan Gao;Dong Liang;Dezhi Zhang;Jingyi Sun","doi":"10.1109/JMASS.2024.3519174","DOIUrl":"https://doi.org/10.1109/JMASS.2024.3519174","url":null,"abstract":"Precise registration of multitemporal synthetic aperture radar (SAR) images is a crucial step in Interferometric SAR (InSAR) data processing and serves as the foundation for high-precision interferometric measurements. Regular SAR image registration methods rely on the coherence between images. However, when faced with decorrelation issues, these methods often fail to yield high-precision registration results, adversely affecting subsequent data processing and interferogram quality. In this article, we propose an assisted method for multitemporal SAR image registration that addresses the challenge. By introducing auxiliary scenes with favorable coherence conditions alongside the primary and secondary images, we establish a mathematical model for the assisted registration method based on geometric relationships. The registration precision of the assisted registration method is evaluated using three indicators: 1) consistency checks; 2) interferogram fringe quality; and 3) coherence coefficient distribution. Sentinel-1 SAR images of the mountainous area in southeastern China were used for the experiment, and results show that the offsets calculated using assisted registration method exhibit greater concentration, and root mean square errors (RMSEs) demonstrate improved accuracy in both range and azimuth directions compared to the regular method, with enhancements of 25.6% and 23.3%, respectively. Additionally, interferograms obtained from the assisted registration show clearer and more complete fringes in regions with low coherence. Notably, the number of samples with coherence coefficients exceeding 0.4 increased significantly by 58.1% in the assisted registration results. While the accuracy of the proposed assisted registration method is comparable to that of regular methods under high-quality conditions, it shows marked advantages in scenarios characterized by severe decorrelation.","PeriodicalId":100624,"journal":{"name":"IEEE Journal on Miniaturization for Air and Space Systems","volume":"6 1","pages":"36-43"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fragility-Rejection UAV Flight Control With Discrete-Time Constrained Dynamics Endowing Preselected Qualities

IEEE Journal on Miniaturization for Air and Space Systems Pub Date : 2024-11-27 DOI: 10.1109/JMASS.2024.3507735

Xiangwei Bu;Ruining Luo;Jiaxi Chen;Humin Lei

引用次数: 0

2024 Index IEEE Journal on Miniaturization for Air and Space Systems Vol. 5 2024 Index IEEE Journal on Miniaturization for Air and Space Systems Vol.

IEEE Journal on Miniaturization for Air and Space Systems Pub Date : 2024-11-25 DOI: 10.1109/JMASS.2024.3504992

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The Journal of Miniaturized Air and Space Systems 微型化航空航天系统杂志

IEEE Journal on Miniaturization for Air and Space Systems Pub Date : 2024-11-20 DOI: 10.1109/JMASS.2024.3496303

引用次数: 0

A Low Profile Wideband Circularly Polarized Slotted Waveguide Antenna for W-Band CubeSat Data-Links

IEEE Journal on Miniaturization for Air and Space Systems Pub Date : 2024-11-05 DOI: 10.1109/JMASS.2024.3491319

Shilpi Singh;Shakti Singh Chauhan;Ananjan Basu

{"title":"A Low Profile Wideband Circularly Polarized Slotted Waveguide Antenna for W-Band CubeSat Data-Links","authors":"Shilpi Singh;Shakti Singh Chauhan;Ananjan Basu","doi":"10.1109/JMASS.2024.3491319","DOIUrl":"https://doi.org/10.1109/JMASS.2024.3491319","url":null,"abstract":"This article presents a dual circularly polarized slotted waveguide leaky wave antenna for CubeSat communications at W-band. The proposed fully metallic, low profile, and high-performing antenna offers wideband operating bandwidth, which makes it suitable for space applications. To achieve circular polarization, an array of circular holes is perforated at an offset position from the narrow wall of the WR-10 waveguide. The prototype antenna provides a wide axial ratio bandwidth of 13% and an average half-power beamwidth of 4.5° on the elevation plane. At high frequencies, the thickness of the slot affects the emission through the slot, which is not typically encountered at low frequencies. Therefore, to increase the magnitude of the radiated power, the wall thickness of the hole is reduced. The proposed circular hole slotted waveguide antenna design provides superior tolerance, accuracy, and precision compared to any other structures. These characteristics eliminate fabrication challenges, especially within the W-band, and can seamlessly extend into the sub-THz domain as well. The proposed antenna is robust, easy to fabricate, and appropriate for integration into CubeSat. It can be adapted for W-band CubeSat LEO, intersatellite, and constellation missions.","PeriodicalId":100624,"journal":{"name":"IEEE Journal on Miniaturization for Air and Space Systems","volume":"6 1","pages":"19-26"},"PeriodicalIF":0.0,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cellular Connected UAV Anti-Interference Path Planning Based on PDS-DDPG and TOPEM

IEEE Journal on Miniaturization for Air and Space Systems Pub Date : 2024-11-04 DOI: 10.1109/JMASS.2024.3490762

Quanxi Zhou;Yongjing Wang;Ruiyu Shen;Jin Nakazato;Manabu Tsukada;Zhenyu Guan

{"title":"Cellular Connected UAV Anti-Interference Path Planning Based on PDS-DDPG and TOPEM","authors":"Quanxi Zhou;Yongjing Wang;Ruiyu Shen;Jin Nakazato;Manabu Tsukada;Zhenyu Guan","doi":"10.1109/JMASS.2024.3490762","DOIUrl":"https://doi.org/10.1109/JMASS.2024.3490762","url":null,"abstract":"Due to the randomness of channel fading, communication devices, and malicious interference sources, uncrewed aerial vehicles (UAVs) face a complex and ever-changing task scenario, which poses significant communication security challenges, such as transmission outages. Fortunately, these communication security challenges can be transformed into path-planning problems that minimize the weighted sum of UAV mission time and transmission outage time. In order to design the complex communication environment faced by UAVs in actual scenarios, we propose a system model, including building distribution, communication channel, and antenna design, in this article. Besides, we introduce other UAVs with fixed flight paths and ground interference resources with random locations to ensure mission UAVs have better anti-interference ability. However, it is challenging for classical search algorithms and heuristic algorithms to cope with the complex path problems mentioned above. In this article, we propose an improved deep deterministic policy gradient (DDPG) algorithm with better performance compared with basic DDPG and double deep Q-network learning (DDQN) algorithms. Specifically, a post-decision state (PDS) mechanism has been introduced to accelerate the convergence rate and enhance the stability of the training process. In addition, a transmission outage probability experience memory (TOPEM) has been designed to quickly generate wireless communication quality maps and provide temporary experience for the post-decision process, resulting in better training results. Simulation experiments have proven that, compared to basic DDPG, the improved algorithm increases training speed by at least 50 %, significantly improves convergence rate, and reduces the episode required for convergence to 20 %. It can alsohelp UAVs choose better paths than basic DDPG and DDQN algorithms.","PeriodicalId":100624,"journal":{"name":"IEEE Journal on Miniaturization for Air and Space Systems","volume":"6 1","pages":"2-18"},"PeriodicalIF":0.0,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Broadband Miniaturized Antenna Based on Enhanced Magnetic Field Convergence in UAV 基于增强磁场聚合的宽带微型天线在无人飞行器中的应用

IEEE Journal on Miniaturization for Air and Space Systems Pub Date : 2024-10-11 DOI: 10.1109/JMASS.2024.3479151

Ju Gao;Zhangziyi Jin;Zonghui Li;Zixian Chen;Qingwang Wang

{"title":"Broadband Miniaturized Antenna Based on Enhanced Magnetic Field Convergence in UAV","authors":"Ju Gao;Zhangziyi Jin;Zonghui Li;Zixian Chen;Qingwang Wang","doi":"10.1109/JMASS.2024.3479151","DOIUrl":"https://doi.org/10.1109/JMASS.2024.3479151","url":null,"abstract":"As unmanned aerial vehicles (UAVs) continue to play an increasingly critical role in reconnaissance missions, establishing dependable communication links between UAVs and ground stations has become imperative. Nevertheless, ensuring reliable communication remains a great challenge, particularly in environments characterized by weak signals or high levels of electromagnetic interference. To tackle this challenge, this study presents a design and optimization approach for a miniature UAV antenna. This antenna achieves significant performance improvements by optimizing the magnetic field (MF) distribution and convergence within its central section. Specifically with the aim of capturing and amplifying signals in a specified direction, the antenna enhances reception sensitivity, especially in challenging operational settings. The structure ensures robust and consistent signal reception with a maximum gain of up to 12.8 dB and a converging MF magnitude of 2279 A/m at its center. Furthermore, it operates effectively within the C band, exhibiting a relative bandwidth of 12.2%. This capability empowers UAV to transmit reconnaissance data accurately and swiftly, regardless of the distance traveled or the complexity of the electromagnetic environment. This advancement not only enhances UAV capabilities but also opens new possibility for applications requiring dependable communication in diverse and demanding scenarios.","PeriodicalId":100624,"journal":{"name":"IEEE Journal on Miniaturization for Air and Space Systems","volume":"5 4","pages":"265-273"},"PeriodicalIF":0.0,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Toward a Better Tradeoff Between Accuracy and Robustness for Image Classification via Adversarial Feature Diversity 通过逆向特征多样性，在图像分类的准确性和稳健性之间实现更好的权衡

IEEE Journal on Miniaturization for Air and Space Systems Pub Date : 2024-09-17 DOI: 10.1109/JMASS.2024.3462548

Wei Xue;Yonghao Wang;Yuchi Wang;Yue Wang;Mingyang Du;Xiao Zheng

{"title":"Toward a Better Tradeoff Between Accuracy and Robustness for Image Classification via Adversarial Feature Diversity","authors":"Wei Xue;Yonghao Wang;Yuchi Wang;Yue Wang;Mingyang Du;Xiao Zheng","doi":"10.1109/JMASS.2024.3462548","DOIUrl":"https://doi.org/10.1109/JMASS.2024.3462548","url":null,"abstract":"Deep neural network-based image classification models are vulnerable to adversarial examples, which are meticulously crafted to mislead the model by adding perturbations to clean images. Although adversarial training demonstrates outstanding performance in enhancing models robustness against adversarial examples, it often incurs the expense of accuracy. To address this problem, this article proposes a strategy to achieve a better tradeoff between accuracy and robustness, which mainly consists of symbol perturbations and examples mixing. First, we employ a symbol processing approach for randomly generated initial perturbations, which makes model identify the correct parameter attack direction faster during the training process. Second, we put forward a methodology that utilizes a mixture of different examples to generate more distinct adversarial features. Further, we utilize scaling conditions for tensor feature modulation, enabling the model to achieve both improved accuracy and robustness after learning more diverse adversarial features. Finally, we conduct extensive experiments to show the feasibility and effectiveness of the proposed methods.","PeriodicalId":100624,"journal":{"name":"IEEE Journal on Miniaturization for Air and Space Systems","volume":"5 4","pages":"254-264"},"PeriodicalIF":0.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0