International Journal of RF and Microwave Computer-Aided Engineering最新文献_第4页

Circularly Polarized Sixteen-Port Flexible UWB MIMO Antenna Featuring Polarization Diversity for WBAN Applications 用于 WBAN 应用的具有极化分集功能的圆极化十六端口柔性 UWB MIMO 天线

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2024-08-10 DOI: 10.1155/2024/8442770

Shailesh, Garima Srivastava, Sachin Kumar, Arpan Desai, Bhawna Goyal, Abdulkarem H. M. Almawgani, Turki Alsuwian

{"title":"Circularly Polarized Sixteen-Port Flexible UWB MIMO Antenna Featuring Polarization Diversity for WBAN Applications","authors":"Shailesh, Garima Srivastava, Sachin Kumar, Arpan Desai, Bhawna Goyal, Abdulkarem H. M. Almawgani, Turki Alsuwian","doi":"10.1155/2024/8442770","DOIUrl":"https://doi.org/10.1155/2024/8442770","url":null,"abstract":"A sixteen-port circularly polarized (CP) ultrawideband (UWB) multiple-input−multiple-output (MIMO) belt antenna is designed and developed for wireless body area network (WBAN) applications. The proposed antenna comprises sixteen modified octagon-like ring antenna elements with a common ground. These antenna elements are designed on leather material and can be worn as a belt. Each antenna element contains a microstrip line feed and a modified octagon-like open-ended ring radiator to generate circular polarization. The belt antenna provides an impedance bandwidth (S11 ≤ −10 dB) of 3.08–11 GHz (112.5%) and a 3 dB axial ratio bandwidth (ARBW) of 4.7–7.07 GHz (40.27%). The envelope correlation coefficient (ECC) amongst the resonating elements is <0.003. Additionally, the bending analysis and specific absorption rate (SAR) of the presented antenna are examined. The overall size of the belt antenna is 30 mm × 574 mm × 1 mm. The designed belt antenna is suitable for WBAN applications due to its leather material, good on-body performance, and nearly identical simulated and experimental results.","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2024 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/8442770","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141967847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Improved Nonlinear I-V Model for GaN HEMTs GaN HEMT 的改进型非线性 I-V 模型

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2024-07-31 DOI: 10.1155/2024/8834864

Qingyu Yuan, Yixin Zhang, Xiaodong Luan, Jun Zhang, Chunxu Xie, Jiali Cheng

引用次数: 0

Constant False Alarm Detection Algorithm Based on KL Scattering 基于 KL 散射的恒定误报检测算法

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2024-07-29 DOI: 10.1155/2024/2218790

Chao Lv, Guozheng Li, Xun Huang, Dongqi Liu

{"title":"Constant False Alarm Detection Algorithm Based on KL Scattering","authors":"Chao Lv, Guozheng Li, Xun Huang, Dongqi Liu","doi":"10.1155/2024/2218790","DOIUrl":"https://doi.org/10.1155/2024/2218790","url":null,"abstract":"With the continuous development of the radar field, millimeter-wave radar target detection, as a major tool, faces important challenges in improving detection performance. Especially in some application scenarios, due to multitarget interference and other reasons, the detection performance of the traditional variability index (VI) constant false alarm rate (CFAR) (VI-CFAR) algorithm decreases significantly in the case where both side windows contain interfering targets. To solve this problem, this paper introduces an innovative algorithm, Kullback–Leibler Divergence and Otsu’s Method Enhanced VI-CFAR (KLOVI-CFAR), to better adapt to the multitarget background environment. By combining the KL scattering and Otsu method, we realize the adaptive rejection of outliers in the reference window and further automatically select the detection algorithm adapted to the processed background environment. The results of simulation experiments verify the excellent detection performance of KLOVI-CFAR in multitarget environments with interfering targets in both side windows. The algorithm not only effectively improves the detection capability and antijamming but also shows good detection performance in homogeneous environment and clutter edge cases. The research results in this paper provide a useful reference for improving the radar target detection algorithm.","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2024 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/2218790","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141967731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and Analysis of Irregular Hexagonal Patch Antenna Using Multiport Network Model (MNM) 使用多端口网络模型 (MNM) 设计和分析不规则六边形贴片天线

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2024-07-29 DOI: 10.1155/2024/8343100

Mishor Biswas, Soham Ghosh, Suman Dey, Kaushik Patra, Bhaskar Gupta

{"title":"Design and Analysis of Irregular Hexagonal Patch Antenna Using Multiport Network Model (MNM)","authors":"Mishor Biswas, Soham Ghosh, Suman Dey, Kaushik Patra, Bhaskar Gupta","doi":"10.1155/2024/8343100","DOIUrl":"https://doi.org/10.1155/2024/8343100","url":null,"abstract":"Multiport network model (MNM) of microstrip patch antennas is an extension of cavity model analysis. In MNM, electromagnetic fields present under and outside patch are modeled separately and the patch is considered as a planar element with multiple ports at its edges. The MNM approach was previously used for the analysis of different patches such as rectangular and circular. However, MNM analysis for irregular-shaped hexagonal patch antenna is not studied yet. Analysis of hexagonal patch antenna is required for its several advantages over other patches such as equivalent surface current distribution with less size compared to circular patch and higher bandwidth. In this work, the irregular-shaped hexagonal patch antenna is analyzed using MNM technique. The antenna is decomposed into rectangular and right-angle triangular segments. Multiport impedance (Z) matrices are calculated for all elements based on Green’s functions of corresponding shapes. Finally, the current distribution of the complete patch is obtained by connecting these elements using Z matrices. The irregular-shaped patch antenna is fabricated, and its responses are measured to verify the results obtained from MNM analysis. MNM can estimate antenna performance with ~3.5% average error with respect to simulated responses in terms of antenna performance parameters.","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2024 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/8343100","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141967732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mounted Director Element on Dual-Band Vivaldi Antenna for Wireless Energy Harvesting Application 用于无线能量收集应用的双波段 Vivaldi 天线上安装的导向元件

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2024-07-25 DOI: 10.1155/2024/5552790

Saeed Hosseini, Changiz Ghobadi, Javad Nourinia, Majid Shokri

{"title":"Mounted Director Element on Dual-Band Vivaldi Antenna for Wireless Energy Harvesting Application","authors":"Saeed Hosseini, Changiz Ghobadi, Javad Nourinia, Majid Shokri","doi":"10.1155/2024/5552790","DOIUrl":"https://doi.org/10.1155/2024/5552790","url":null,"abstract":"This paper presents radio frequency energy harvesting (RFEH) using a rectenna system for 3.1 and 5.75 GHz frequencies. The antenna used in this work is a Vivaldi antenna with a new structure. Mounting the newly designed parasitic element on the proposed Vivaldi antenna has improved the gain and directivity of the antenna. The parasitic element is introduced as the director element. The arms of the director element are expanded exponentially. We simulated the proposed antenna design in CST Studio Suite and simulated the proposed rectifier in an advanced design system (ADS). The substrates chosen for the antenna and rectifier are of low-cost type. We have used the voltage doubler technique for the rectifier. Good impedance matching using two stubs has made it possible to connect the rectifier to the antenna. We obtained RF to DC measurement results for the proposed design, which are 56.3% for 3.1 GHz at 8.5 dBm input power and 33.4% for 5.75 GHz at 6.5 dBm input power, respectively. After combining the antenna and the rectifier, the maximum efficiency measured for the power input of 5 dBm at the frequency of 3.1 GHz is equal to 50.8%, which is suitable for energy harvesting.","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2024 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/5552790","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141968169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Efficient Geometric Parameter Optimization Method for Microstrip Bandpass Filter Based on One-Dimensional Convolutional Neural Network 基于一维卷积神经网络的微带带通滤波器高效几何参数优化方法

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2024-07-23 DOI: 10.1155/2024/5524054

Yang Gao, Danyang Wang, Huilong Yu, Tao Hua, Ning Hou, Yapeng Lu

{"title":"An Efficient Geometric Parameter Optimization Method for Microstrip Bandpass Filter Based on One-Dimensional Convolutional Neural Network","authors":"Yang Gao, Danyang Wang, Huilong Yu, Tao Hua, Ning Hou, Yapeng Lu","doi":"10.1155/2024/5524054","DOIUrl":"https://doi.org/10.1155/2024/5524054","url":null,"abstract":"Machine learning-assisted electromagnetic simulation has become an effective acceleration tool for designing microwave components by introducing high-precision models and optimization algorithms, featuring fast design and high efficiency. However, enormous amount of data generated from the blind preliminary and computationally expensive simulation is required to predict the accuracy response. An efficient geometric parameter optimization method for microstrip bandpass filter (BPF) based on a one-dimensional convolutional neural network is proposed. Nonlinear convergence factor, adaptive weight, and Gaussian difference mutation strategies are integrated using the whale optimization algorithm to avoid the local optimum and improve optimization accuracy. Computational efficiency is improved significantly with small-scale training data. The validity and efficiency of the proposed method are confirmed by fifth-order microstrip BPFs, and the performance of the predicted structure parameters is significantly improved, which shows great promise for application in optimization and performance improvement in microwave electromagnetic simulation.","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2024 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/5524054","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141968074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Miniaturized High-Performance Metasurface Antenna Embedded in Cross-Shaped Strips 嵌入十字形条带的微型高性能元面天线

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2024-07-22 DOI: 10.1155/2024/9944694

Shuangde Li, Xuelan Xiong, Yuanjian Liu, Jinhong Jiang, Minyu Jiang

{"title":"Miniaturized High-Performance Metasurface Antenna Embedded in Cross-Shaped Strips","authors":"Shuangde Li, Xuelan Xiong, Yuanjian Liu, Jinhong Jiang, Minyu Jiang","doi":"10.1155/2024/9944694","DOIUrl":"https://doi.org/10.1155/2024/9944694","url":null,"abstract":"A miniaturized high-performance metasurface (MTS) antenna with cross-shaped strips is designed, which can be applied to wireless communication systems. The resonant frequency of the main mode of the proposed MTS is reduced by embedding a 2 × 2 cross-shaped strip array in the gaps of the 3 × 3 circular MTS array, resulting in a lower operating frequency and miniaturization. The main mode of the MTS and the probe mode are excited simultaneously by the L-probe structure, resulting in a dual-mode resonance for a broadband performance. The entire design mechanism of the antenna is explained analytically through characteristic mode analysis (CMA) method. Additionally, the cross-polarization levels in H-plane are effectively suppressed by a metal via positioned at the MTS center. Measured results show a wide impedance bandwidth of 32.6% (reflection coefficient ≤ −10 dB) with an MTS size of 0.44λ0 × 0.39λ0 (where λ0 is the free-space wavelength of 6.6 GHz). The achieved peak gain is 7.1 dBi, with a 2 dB gain bandwidth of 36% (5.25-7.55 GHz) and a low cross-polarization level below -20 dB.","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2024 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/9944694","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141967269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metadevice for Electromagnetic Cloaking With Monitors in Complex Space 在复杂空间利用监测器进行电磁隐形的元设备

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2024-07-18 DOI: 10.1155/2024/7826340

Junjie Shao, Yuehai Sang, Ren Wang, Jun Xie, Xiaolong Xu, Junjie Lang, Ziwei Zhou, Bing-Zhong Wang

{"title":"Metadevice for Electromagnetic Cloaking With Monitors in Complex Space","authors":"Junjie Shao, Yuehai Sang, Ren Wang, Jun Xie, Xiaolong Xu, Junjie Lang, Ziwei Zhou, Bing-Zhong Wang","doi":"10.1155/2024/7826340","DOIUrl":"https://doi.org/10.1155/2024/7826340","url":null,"abstract":"Electromagnetic cloaking with monitors within waveguide plays a pivotal role in minimizing the risk of detection while intercepting sensitive information which holds immense potential in both military and communication sectors. However, the integration of electromagnetic cloaking and monitoring is challenging and even more difficult to realize in waveguide. To address these challenges, we propose a metadevice design method based on the internal multiport method (IMPM) for ensuring effective monitoring while maintaining electromagnetic cloaking in the complex environments of waveguide systems. Strategically adjusting the distribution and arrangement of auxiliary scatterers in proximity to the monitoring apparatus can flexibly regulate the behavior of electromagnetic wave propagation to enhance the cloaking performance of metadevice. The cases presented in the paper validate the designed metadevices that are capable of achieving both cloaking and monitoring for monitors within waveguide systems.","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2024 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/7826340","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141730139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of Rocket-Borne Data Transmission System for Sounding Rocket 探空火箭数据传输系统的设计

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2024-07-17 DOI: 10.1155/2024/3646911

Ziyu Xu, Yongsheng Deng, Yifang Xie

引用次数: 0

Efficient Solution of Transient Electromagnetic Scattering Using ACA-SVD-Enhanced FDDM Method 使用 ACA-SVD 增强 FDDM 方法高效解决瞬态电磁散射问题

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2024-07-10 DOI: 10.1155/2024/1514875

Qiong Wang, Ji Ding, Jun Wang

引用次数: 0