Iet Microwaves Antennas & Propagation最新文献_第6页

A low radar cross section antenna array based on a liquid metal metasurface 基于液态金属超表面的低雷达截面天线阵列

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-01-23 DOI: 10.1049/mia2.12452

Lu-Yang Ji, Xiaoyue Hong, Rui Yang, Qingyue Liu, Wenhan Zhang

引用次数: 0

An efficient adaptive h-refinement for the RWG-based electric field integral equation applied to antennas with waveport 应用于带波口天线的基于 RWG 的高效自适应 h-refinement 电场积分方程

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-01-18 DOI: 10.1049/mia2.12454

Ning Ding, Lei Yin, Xunwang Zhao, ZhongChao Lin, Yu Zhang, Aiwen Luo, Xiaojie Dang

引用次数: 0

Deep unfolding model-based for hybrid robust wide band adaptive beamforming 基于深度展开模型的混合鲁棒宽带自适应波束成形

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-01-17 DOI: 10.1049/mia2.12450

Reza Janani, Reza Fatemi Mofrad

{"title":"Deep unfolding model-based for hybrid robust wide band adaptive beamforming","authors":"Reza Janani, Reza Fatemi Mofrad","doi":"10.1049/mia2.12450","DOIUrl":"10.1049/mia2.12450","url":null,"abstract":"The design of arrays capable of receiving wideband signals differs from arrays that can only receive narrowband signals. These arrays must be able to receive signals with an instant bandwidth of several GHz across the entire operating frequency, such as High-Resolution Radars or Terahertz in 6G communication systems. In these arrays, using a time delay line structure leads to an increase in beamformer coefficients, resulting in high computational complexity. This poses a challenge for beamforming in wideband systems. Additionally, classic Wideband beamformers face other factors, such as poor performance in the presence of input direction of arrival error, array calibration error, and requiring too many snapshots to reach the steady state of the beamformer. Therefore, the robustness of wideband adaptive beamforming using deep unfolding model-based technique is focused on, which has not been discussed before. The advent of deep unfolding, an innovative technique, amalgamates iterative optimization approaches with elements of neural networks. The aim is to deftly maneuver through various tasks across disciplines such as machine learning, signal and image processing, and telecommunication systems. Also, the network training method is done to become more robust against the mentioned factors. In the proposed structure, the constraints of the previous methods have been evaluated. It is observed to have better performance compared to other classic algorithms. Also, with the investigations of the proposed method with other conventional deep learning methods, it was observed that in some cases the proposed structure performance is equal to the conventional deep learning method and sometimes better.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 7","pages":"480-493"},"PeriodicalIF":1.1,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12450","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139497440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Combined-harmonics wireless power transfer system 组合谐波无线电力传输系统

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-01-10 DOI: 10.1049/mia2.12453

Elham Karimi Marnani, Jalil Rashed-Mohassel, Mahmoud Shahabadi

{"title":"Combined-harmonics wireless power transfer system","authors":"Elham Karimi Marnani, Jalil Rashed-Mohassel, Mahmoud Shahabadi","doi":"10.1049/mia2.12453","DOIUrl":"10.1049/mia2.12453","url":null,"abstract":"A technique for wireless power transfer (WPT) efficiency improvement by a proper design of the excitation waveform is presented. This improvement is obtained on the one hand by a combined-harmonics excitation, and on the other hand by exploiting multiple-resonance coupled resonators. In contrast to wireless communications, there is no constraint on the linearity of the transmitter and receiver in a WPT system. Therefore, the impact of the excitation waveform on the power transfer efficiency with the help of an analytical model is investigated. An optimum excitation waveform is determined to maximise the power transfer efficiency. Thereafter, the authors concentrate on designing a multiple-resonance coupled resonator system that is consistent with the determined excitation waveform. This work introduces a non-uniform spiral resonator for controlling the self-resonant frequencies, which is consistent with the required excitation waveform. The performance of the designed coupled resonators is then evaluated using a 3D finite-element method and experiments. The numerical simulation and experimental results are in good agreement, verifying the validity of our design.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 3","pages":"164-172"},"PeriodicalIF":1.7,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12453","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139421433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Correction to channel measurement and characterisation for 5G multi-scenarios at 26 and 38 GHz 对 26 和 38 千兆赫 5G 多场景信道测量和特性分析的修正

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-12-31 DOI: 10.1049/MIA2.12448

引用次数: 0

A wideband dual-band bandstop filter with flexible control of stopband rejection, bandwidth and centre frequency ratio 可灵活控制阻带抑制、带宽和中心频率比的宽带双频带阻带滤波器

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-12-29 DOI: 10.1049/mia2.12451

Chang Xu, Xiaolong Wang, Lei Zhu, Wenzhong Sun, Kun Li, Gennadi Milinevsky, Geyu Lu

引用次数: 0

A simple yet efficient solution for TE scattering from a right trapezoidal groove 右梯形凹槽 TE 散射的简单而高效的解决方案

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-12-27 DOI: 10.1049/mia2.12446

Mehdi Bozorgi

引用次数: 0

Application of switchable 4G/5G dual antenna system for laptops 笔记本电脑可切换 4G/5G 双天线系统的应用

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-12-26 DOI: 10.1049/mia2.12449

Shao-Hung Cheng, Shu-Chuan Chen, Chang-Sheng Wu, Jo-Yen Nieh

{"title":"Application of switchable 4G/5G dual antenna system for laptops","authors":"Shao-Hung Cheng, Shu-Chuan Chen, Chang-Sheng Wu, Jo-Yen Nieh","doi":"10.1049/mia2.12449","DOIUrl":"10.1049/mia2.12449","url":null,"abstract":"This work investigates a switchable 4G/5G dual-antenna system designed for laptops. The dual open-slot antenna structure is straightforward, with a slot width of only 2 mm. Each individual antenna features two different feed sections located in two separate regions between the slots. Port 1 is a direct-feeding design with 3.6 pF chip capacitance, while Port 2 is only a direct-feeding design. When Port 1 is excited and Port 2 is terminated to 50-Ω, the antenna is functional in long-term evolution (LTE) low-band (617–960 MHz) and 5G sub-6 GHz band (3300–5000 MHz). On the other hand, when Port 2 is excited and Port 1 is terminated to 50-Ω, the antenna is functional in the LTE medium/high bands between 1710 and 2690 MHz. The measured isolation consistently exceeded 30 dB, and the efficiency remained above 48% across the entire frequency range. The calculated envelope correlation coefficients derived from the complex E-field radiation pattern measurements were consistently below 0.02. These findings indicate that the system is exceptionally well-suited for applications characterised by integrated metallic environments and a high display-to-body ratio.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 2","pages":"116-127"},"PeriodicalIF":1.7,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12449","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139054594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Miniaturised wideband bandpass filter with good selectivity based on 3D heterogeneous integrated passive device technology 基于 3D 异构集成无源器件技术的具有良好选择性的小型化宽带带通滤波器

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-12-25 DOI: 10.1049/mia2.12447

Yujin Zhou, Jun Zhou, Chonghu Cheng, Yong Cheng

{"title":"Miniaturised wideband bandpass filter with good selectivity based on 3D heterogeneous integrated passive device technology","authors":"Yujin Zhou, Jun Zhou, Chonghu Cheng, Yong Cheng","doi":"10.1049/mia2.12447","DOIUrl":"10.1049/mia2.12447","url":null,"abstract":"The miniaturised wideband filter with good frequency selectivity and wide stopband is proposed, which is based on three-dimensional (3D) heterogeneous integrated passive device technology. The proposed sixth-order wideband bandpass filter is based on the magnetic-coupling-loaded highpass-lowpass lumped topology and implemented by the 3D heterogeneous integration process, integrating GaAs-based and Glass-based micro-nano-scale processes together. Then, lumped inductors are designed in the Glass substrate with low dielectric loss tangent and realised by a three-dimensional spiral structure. Therefore, the inductors have high quality factors and small sizes. The lumped capacitors are designed using the GaAs thin film process. Finally, a prototype with a 3-dB fractional bandwidth of 42% is designed and fabricated at 3.875 GHz (f0). The upper-stopband attenuation higher than 30 dB is extended to more than 5.15f0. It occupies only 0.014 × 0.018 λ02 (1.1 × 1.42 mm2), where λ0 is the free-space wavelength at f0.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 4","pages":"266-271"},"PeriodicalIF":1.7,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12447","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139054457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

The low-cost inhomogeneous multi-section flat lens antenna with minimum F over D design in Ku-band 采用最小 F 大于 D 设计的低成本非均质多截面平面透镜天线（Ku 波段

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-12-22 DOI: 10.1049/mia2.12442

Mohammad Mahdi Taskhiri

引用次数: 0