Iet Microwaves Antennas & Propagation最新文献_第5页

Compact broadband high-gain dielectric rod antenna with air–dielectric hybrid design for millimetre-wave applications 采用空气-介质混合设计的毫米波应用的紧凑型宽带高增益介电杆天线

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-12-04 DOI: 10.1049/mia2.12537

Yuwei Zhang, Shu Lin, Zhenyu Xu, Xingqi Zhang, Xinyue Zhang

{"title":"Compact broadband high-gain dielectric rod antenna with air–dielectric hybrid design for millimetre-wave applications","authors":"Yuwei Zhang, Shu Lin, Zhenyu Xu, Xingqi Zhang, Xinyue Zhang","doi":"10.1049/mia2.12537","DOIUrl":"https://doi.org/10.1049/mia2.12537","url":null,"abstract":"This paper presents a compact, broadband, high-gain dielectric rod antenna. By utilising an air–dielectric hybrid method for designing the radiating and matching sections, gradual variations in the average equivalent permittivity along the rod are achieved, and the mechanism of the method is analysed. This approach facilitates a smooth impedance transition from the feed to the air, resulting in good impedance matching characteristics. Additionally, the antenna is fed through a tapered double-ridged waveguide (DRW) with a coaxial line to tapered DRW transition. The proposed antenna achieves an impressive impedance bandwidth of 90.2%, covering the entire K and Ka bands. The unique structure of the proposed dielectric rod significantly enhances the antenna's gain, reaching a maximum value of 17.86 dBi. With its small aperture and compact longitudinal dimensions, this antenna is suitable for applications in settings like the Space Environment Simulation Research Infrastructure (SESRI).","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 12","pages":"1156-1163"},"PeriodicalIF":1.1,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12537","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248399","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

Frequency-diverse aperture imaging using an open cavity with a rough base 采用带有粗糙底座的开腔的变频孔径成像

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-12-03 DOI: 10.1049/mia2.12535

Ehsan Rashidi-Ranjbar, Jalil A. Rashed-Mohassel, Mojtaba Dehmollaian

{"title":"Frequency-diverse aperture imaging using an open cavity with a rough base","authors":"Ehsan Rashidi-Ranjbar, Jalil A. Rashed-Mohassel, Mojtaba Dehmollaian","doi":"10.1049/mia2.12535","DOIUrl":"https://doi.org/10.1049/mia2.12535","url":null,"abstract":"This paper proposes a single-shot computational imaging using a new frequency-diverse aperture, an open-ended cavity with a rough surface base. First, it shows that scattering from a conducting rough surface made of conducting cones placed at random positions on a conducting ground plane, normally illuminated by an ultra-wideband horn antenna (working in the 2–20 GHz range) provides random patterns with a frequency correlation function (FCF) width of Δf, about hundreds of MHz. Next, by introducing four conducting walls placed around the rough surface, it obtains a higher number of spatially uncorrelated radiation patterns and a narrower FCF width of about Δf/10, tens of MHz. To approximate the radiation patterns and measurement matrices in the numerical simulations, the geometrical optics (GO) approximation is used taking into account multiple interactions. On the other hand, to estimate them in practice, a trihedral corner reflector installed on an XYZ positioning table is employed. Finally, the image of a planar object with the shape of plus is reconstructed using the minimum least-squares technique. The paper shows that for a 0.81 square metre image size, a decent-focused image with a pixel size of about 0.81/400 square metres (about 5 cm × 5 cm) is realisable by using 400 frequency samples within the frequency range of 2–20 GHz.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 12","pages":"1139-1147"},"PeriodicalIF":1.1,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12535","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248319","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

280–300 GHz SiGe-InP hybrid-integrated transmitter with 21.9 dBm EIRP and 10 Gbps data rate 280-300 GHz SiGe-InP混合集成发射机，EIRP 21.9 dBm，数据速率10gbps

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-11-30 DOI: 10.1049/mia2.12532

Haiyan Lu, Jixin Chen, Pinpin Yan, Si-Yuan Tang, Yu Zheng, Sidou Zheng, Wei Cheng, Yan Sun, Peigen Zhou, Long Chang, Longzhu Cai, Zhi Hao Jiang, Hongqi Tao, Tangsheng Chen, Wei Hong

引用次数: 0

Machine learning-driven design of dual-band antennas using PGGAN and enhanced feature mapping 基于PGGAN和增强特征映射的双频天线机器学习驱动设计

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-11-27 DOI: 10.1049/mia2.12534

Lung-Fai Tuen, Ching-Lieh Li, Yu-Jen Chi, Chien-Ching Chiu, Po Hsiang Chen

{"title":"Machine learning-driven design of dual-band antennas using PGGAN and enhanced feature mapping","authors":"Lung-Fai Tuen, Ching-Lieh Li, Yu-Jen Chi, Chien-Ching Chiu, Po Hsiang Chen","doi":"10.1049/mia2.12534","DOIUrl":"https://doi.org/10.1049/mia2.12534","url":null,"abstract":"This paper presents a systematic antenna design methodology that integrates machine learning, leveraging the progressive growth technique of Progressive Growing of GANs (PGGAN) to generate images of various dual-band PIFA-like antenna structures. The process involves using data augmentation methods to generate 4180 antenna samples. In the latent space, the authors employ Latin Hypercube Sampling to maintain diversity and combine it with the Hough Transform to enhance the edge features of the antennas while providing labelling functionality. This labelling method strengthens the relationship between antenna frequency and wavelength characteristics. The paper clearly outlines the design process, starting from the simulation of two types of single-frequency PIFA-like antennas (2.45 and 5.2 GHz, respectively) to the completion of PGGAN's generation task, resulting in a novel dual-band Wi-Fi PIFA-like antenna structure. The measurement results of the dual-band antennas exhibit excellent consistency with the simulation results.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 12","pages":"1113-1138"},"PeriodicalIF":1.1,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12534","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253415","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

Computation of monostatic RCS using adaptive sparsity pattern preconditioning with an MBF-MLFMM approach 基于MBF-MLFMM自适应稀疏模式预处理的单静态RCS计算

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-11-22 DOI: 10.1049/mia2.12531

Carlos Delgado, Eliseo García, Felipe Cátedra

引用次数: 0

Direct design method for wideband quadruplet and higher-order bandpass filters with a pair of transmission zeros based on explicit design formulas 基于显式设计公式的带一对传输零的宽带四重态高阶带通滤波器直接设计方法

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-11-21 DOI: 10.1049/mia2.12530

Juseop Lee, Hyunjong Choi, Jongheun Lee, Minhyup Song

{"title":"Direct design method for wideband quadruplet and higher-order bandpass filters with a pair of transmission zeros based on explicit design formulas","authors":"Juseop Lee, Hyunjong Choi, Jongheun Lee, Minhyup Song","doi":"10.1049/mia2.12530","DOIUrl":"https://doi.org/10.1049/mia2.12530","url":null,"abstract":"This paper presents a direct design approach and explicit design formulas for a wideband quadruplet bandpass filter with a pair of transmission zeros. A filter can be designed based on a filter schematic composed of only transmission lines and a short-circuited coupled-line section. The electrical length of all lines including the coupled-line section is 90<math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo>°</mo>\u0000 </mrow>\u0000 <annotation> ${}^{circ}$</annotation>\u0000 </semantics></math>. The impedances of all lines can be calculated by explicit design formulas given in terms of the normalised coupling values in a coupling matrix of a quadruplet filter, which differentiates this work from existing design approaches. A fourth-order filter example is illustrated for demonstrating the practicality of using the presented structure and design formulas. This paper also discusses the expansion of the presented direct design approach for higher-order filter designs.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 12","pages":"1084-1093"},"PeriodicalIF":1.1,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12530","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143252939","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

General numerical solution of integral equation for long-range low-frequency groundwave propagation over irregular terrain 不规则地形上长距离低频地波传播积分方程的一般数值解

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-11-20 DOI: 10.1049/mia2.12536

Dan-Dan Wang, Qi-Zirui Lu, Chao Han, Yun Fang, Yu-Rong Pu

引用次数: 0

Plane wave diffraction by a semi-infinite parallel-plate waveguide with partial material loading: The case of H polarisation 半无限平行板波导在部分材料加载下的平面波衍射：H偏振的情况

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-11-15 DOI: 10.1049/mia2.12528

Tong Zhang, Kazuya Kobayashi

引用次数: 0

Ultra-broadband OAM generator of high-efficiency, high-purity vortex electromagnetic waves based on an ultrathin reflective Pancharatnam–Berry metasurface for the microwave band 基于超薄反射Pancharatnam-Berry超表面的微波波段高效、高纯度涡旋电磁波超宽带OAM发生器

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-11-06 DOI: 10.1049/mia2.12513

Yongzhong Zhu, Fangxuan Zou, Wenxuan Xie, Kaiwei Zuo, Bao Xiong

{"title":"Ultra-broadband OAM generator of high-efficiency, high-purity vortex electromagnetic waves based on an ultrathin reflective Pancharatnam–Berry metasurface for the microwave band","authors":"Yongzhong Zhu, Fangxuan Zou, Wenxuan Xie, Kaiwei Zuo, Bao Xiong","doi":"10.1049/mia2.12513","DOIUrl":"https://doi.org/10.1049/mia2.12513","url":null,"abstract":"In this paper, a new arc-shaped meta-atom like a fishbone controlled by Pancharatnam–Berry (PB) phase is designed for a microwave band, which can yield a high-purity vortex electromagnetic (EM) waves ranged from 10.63 to 26.86 GHz (relative bandwidth of 86.6%) with an efficiency of more than 90%. A single-beam metasurface with <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>m</mi>\u0000 </mrow>\u0000 <annotation> $m$</annotation>\u0000 </semantics></math> = +1, −2 and +3 modes is designed, respectively. Finally, a prototype with <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>m</mi>\u0000 </mrow>\u0000 <annotation> $m$</annotation>\u0000 </semantics></math> = −2 mode is manufactured in order to prove the feasibility of the designed metasurface. It shows that the experimental results are in good agreement with the ones of the simulation, which verified the excellent performance of the metasurface. The metasurface has a series of edges such as ultra-broadband, high efficiency, high purity and low profile compared to the conventional metasurfaces, which have strong practical applied value and significance for wireless communication.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 12","pages":"964-973"},"PeriodicalIF":1.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12513","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248921","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

Doppler effects in UAV-to-vehicle multipath channels under 6D mobility 6D机动性下无人机对飞行器多径信道的多普勒效应

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-11-06 DOI: 10.1049/mia2.12527

Junwei Bao, Zhuangzhuang Cui, Yang Miao, Qiuming Zhu, Kai Mao, Boyu Hua

{"title":"Doppler effects in UAV-to-vehicle multipath channels under 6D mobility","authors":"Junwei Bao, Zhuangzhuang Cui, Yang Miao, Qiuming Zhu, Kai Mao, Boyu Hua","doi":"10.1049/mia2.12527","DOIUrl":"https://doi.org/10.1049/mia2.12527","url":null,"abstract":"Unmanned aerial vehicle (UAV) empowered vehicular networks are capable of providing flexible radio access, efficient data transmission, and secure driving operation. For these promising applications, the authors focus on channel modelling for UAV-to-vehicle (U2V) communications in this paper, which is the very first step for communication system design. Based on geometry and multi-dimensional mobility patterns, a geometry-based stochastic model framework for U2V communication is studied. Considering the practical scenario, multipath components (MPCs) are composed of a line-of-sight (LoS) path, a ground reflection (GR) path, and several random scattering (SC) paths. Specifically, the movement of a UAV in both three-dimensional (3D) translational and 3D rotational directions is considered as well as a ground vehicle capable of moving in arbitrary directions with varying velocities. Subsequently, the Doppler shift expressions for various paths and movements are presented individually, incorporating spatial angles. Comprehensive simulation results are examined, illustrating that six-dimensional (6D) motion exhibits varying effects with linear relative velocity, local angular velocity, and two types of spatial angles. Moreover, channel statistical properties such as temporal auto-correlation function (TCF) and Doppler power spectral density (PSD) are studied to show the consideration of 6D mobility is indispensable.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 12","pages":"1042-1054"},"PeriodicalIF":1.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12527","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248920","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