Iet Microwaves Antennas & Propagation最新文献

A flat aperture antenna composed of a series fed H-plane horn array excited by a ridge gap waveguide horn 由脊隙波导喇叭激励的串联馈电H平面喇叭阵列组成的平孔径天线

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2022-01-04 DOI: 10.1049/mia2.12223

Farhaneh Farzin Nasab, Seyed Ali Razavi Parizi, Mohammad Hossein Ostovarzadeh

引用次数: 1

Design of a liquid crystal beam-steerable antenna with characteristic mode analysis 液晶波束导向天线的特性模态分析

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2021-12-01 DOI: 10.1049/mia2.12217

Jun Shu, Yueping Zhang

引用次数: 2

Balanced multiple-layer dual-mode substrate integrated waveguide filters with controllable finite-transmission zeros 具有可控有限传输零点的平衡多层双模衬底集成波导滤波器

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2021-11-24 DOI: 10.1049/mia2.12212

Qing Liu, Qikun Liu, Jianbin Li, Jinjin Wei, Dewei Zhang

{"title":"Balanced multiple-layer dual-mode substrate integrated waveguide filters with controllable finite-transmission zeros","authors":"Qing Liu, Qikun Liu, Jianbin Li, Jinjin Wei, Dewei Zhang","doi":"10.1049/mia2.12212","DOIUrl":"10.1049/mia2.12212","url":null,"abstract":"This paper proposes three balanced multiple-layer dual-mode substrate integrated waveguide (SIW) bandpass filters. The first balanced filter has two substrate layers, and two pairs of balanced feeding ports are located on the upper substrate layer. The lower and upper dual-mode SIW cavities are coupled by two crossed slots in the middle metal layer. The second balanced filter has two substrate layers, and two pairs of balanced feeding ports locate parallelly on the upper and lower substrate layers, respectively. The third balanced filter has three substrate layers, and two pairs of balanced feeding ports locate vertically on the upper and lower substrate layers, respectively. The proposed three balanced filters can produce three, two and one finite-transmission zeros (FTZs), respectively. Characteristics of the proposed multiple-layer SIW filters with controllable FTZs' locations are analysed in detail. For the demonstration, some design examples with the centre frequency of 7.5 GHz and bandwidth of 240 MHz are presented, and three design examples are fabricated to verify the performance of the proposed balanced filters. The measured results agree well with simulated ones.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"15 15","pages":"1982-1994"},"PeriodicalIF":1.7,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12212","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41804223","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

Ultra-wideband antenna system for in-band full-duplex applications 带内全双工应用的超宽带天线系统

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2021-11-12 DOI: 10.1049/mia2.12194

Hadi Hijazi, Marc Le Roy, Raafat Lababidi, Denis Le Jeune, Andre Pérennec

引用次数: 4

A two-dimensional beam scanning continuous transverse stub antenna based on a single-layer compact linear source generator 基于单层紧凑线性源发生器的二维波束扫描连续横向短天线

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2021-10-21 DOI: 10.1049/mia2.12201

Ming-Yang Zhao, Xue Lei, Jun Gao, Yi-Jun Zhu, Tian-Peng Li, Qiang Peng

{"title":"A two-dimensional beam scanning continuous transverse stub antenna based on a single-layer compact linear source generator","authors":"Ming-Yang Zhao, Xue Lei, Jun Gao, Yi-Jun Zhu, Tian-Peng Li, Qiang Peng","doi":"10.1049/mia2.12201","DOIUrl":"10.1049/mia2.12201","url":null,"abstract":"To minimise the profile of Satcom-on-the-Move ground terminals, in this study, a two-dimensional beam-scanning continuous transverse stub antenna that is based on a compact linear source generator (LSG) is presented. A periodic anti-symmetric two-step (ASTS) structure cascaded with a broadband network is used to construct a single-layer compact LSG. The concept of a parallel-plate waveguide polarisation twister is used to design the ASTS unit that acts as a TE10-to-transverse electromagnetic wave converter, to which chamfers and T-type grooves are added to improve the output plane wave performance over the entire frequency band. A prototype array operating in the band 10.95–12.75 GHz is designed, fabricated, and measured, and the experimental results agree well with the simulated ones. A beam-scanning range of ±61° in elevation is achieved at the central frequency. Although only 29 of 36 slots (ϕ = 0°) contribute to the radiation, the antenna aperture efficiency is still over 60% due to the superior performance of the single-layer minimised LSG.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"15 14","pages":"1842-1852"},"PeriodicalIF":1.7,"publicationDate":"2021-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12201","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41245234","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: 1

Development of a wideband symmetric pillbox antenna with low side lobes in gap waveguide technology 隙波导技术中宽带低边瓣对称弹盒天线的研制

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2021-10-21 DOI: 10.1049/mia2.12197

Mohammad Mohammadpour, Farzad Mohajeri, Seyed Ali Razavi Parizi

引用次数: 0

Time-domain signal and noise modelling and analysis of millimetre-wave and THz high electron mobility transistors 毫米波和太赫兹高电子迁移率晶体管的时域信号和噪声建模与分析

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2021-07-06 DOI: 10.1049/mia2.12173

Alireza Mohammadzade, Abdolali Abdipour, Amir N. Askarpour

{"title":"Time-domain signal and noise modelling and analysis of millimetre-wave and THz high electron mobility transistors","authors":"Alireza Mohammadzade, Abdolali Abdipour, Amir N. Askarpour","doi":"10.1049/mia2.12173","DOIUrl":"10.1049/mia2.12173","url":null,"abstract":"This study presents the simultaneous signal and noise modelling and analysis of mm-wave/THz high electron mobility transistors (HEMTs) in the linear regime as stochastic active multi-conductor transmission lines (SAMTLs). For such devices, stochastic inhomogeneous telegrapher equations of SAMTLs are extracted assuming the domination of the quasi-transverse electromagnetic mode. Analytical solutions for these equations do not exist. So a numerical analysis of such equations is introduced here at millimetre-wave and terahertz frequencies. These equations are analysed with a numerical method in the time domain, namely the finite-integration technique. A semi-distributed model in the advanced design system commercial software is used to validate the numerical results. Also, the results of noise figure and scattering parameters (S-parameters) for the metal–semiconductor field-effect transistor transistor, which has the same SAMTLs model as the HEMT transistor, are compared with the measurement reports at microwave frequencies.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"15 12","pages":"1636-1648"},"PeriodicalIF":1.7,"publicationDate":"2021-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12173","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41672909","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

Optimal synthesis of reconfigurable planar arrays for monopulse radar applications: Use of subarrays and distributions with common aperture tail 用于单脉冲雷达应用的可重构平面阵列的最佳合成:使用子阵列和具有共孔径尾的分布

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2021-07-01 DOI: 10.1049/MIA2.12104

Zhengdong Qi, Xinggan Zhang, Yechao Bai, Qiong Wang, Chunhua Yu, Hao Chen, Yangyi Lu, Shaopeng Wu

{"title":"Optimal synthesis of reconfigurable planar arrays for monopulse radar applications: Use of subarrays and distributions with common aperture tail","authors":"Zhengdong Qi, Xinggan Zhang, Yechao Bai, Qiong Wang, Chunhua Yu, Hao Chen, Yangyi Lu, Shaopeng Wu","doi":"10.1049/MIA2.12104","DOIUrl":"https://doi.org/10.1049/MIA2.12104","url":null,"abstract":"An approach for the synthesis of sum and difference patterns in monopulse antennas is described. The proposed approach provides a significant reduction in the complexity of the beam ‐ forming network that is fulfilled by reducing the number of array elements and keeping the elements at the edges of the array that share common excitations for both sum and difference modes. An iterative constrained optimisation method is used where the non ‐ convex lower ‐ bound constraints on the beam pattern are cast as an equivalent multi ‐ convex optimisation problem while concurrently minimising a reweighted l 1 ‐ norm of the magnitudes of the elements in the beam ‐ forming weight vector. Thus, better radiation performance of beam pattern (e.g. narrower beamwidth, lower peak sidelobe level), a much narrower spatial aperture and a smaller number of elements can be achieved compared with the case of uniformly spaced arrays. To compensate for array imperfection in practice, robust beam pattern constraints are derived in the optimisation stage using a worst ‐ case performance optimisation technique. Numerical examples show the effectiveness and advantages of the proposed synthesis approach.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41898571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The performance of in-building measurement-based path loss modelling using kriging 基于kriging的室内测量路径损耗建模的性能

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2021-06-11 DOI: 10.1049/mia2.12163

M. E. Diago-Mosquera, A. Aragón-Zavala, C. Vargas-Rosales

引用次数: 7

Characterization of a 60 GHz scattered wireless channel with different antenna polarizations for underground multimedia applications 地下多媒体应用中不同天线极化的60 GHz散射无线信道特性研究

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2021-04-09 DOI: 10.1049/mia2.12116

Shah Ahsanuzzaman Md Tariq, Charles L. Despins, Sofiène Affes, Chahé Nerguizian

{"title":"Characterization of a 60 GHz scattered wireless channel with different antenna polarizations for underground multimedia applications","authors":"Shah Ahsanuzzaman Md Tariq, Charles L. Despins, Sofiène Affes, Chahé Nerguizian","doi":"10.1049/mia2.12116","DOIUrl":"10.1049/mia2.12116","url":null,"abstract":"Large scale (i.e. <10 m) and small scale (i.e. 1 × 1× 1 cm) measurements and characterization of a scattered wireless channel with different antenna polarizations and configurations in the underground mine galleries at 60 GHz are addressed. Results show that the rough surface scattering and the gallery dimensions affect the path loss (PL) exponent and it becomes smaller than the free space. Vertically polarized antennas give a lower value of the PL exponent and root mean square (RMS) delay spread compared to the horizontal one. The small scale 3D measurement results show that the power loss of around 1–5 dB within a small scale cubical area. Results also show that the channel is less time dispersive in a wider gallery and observed a higher value of the RMS delay spread compared to a smaller gallery. The statistical results of the small scale multipath amplitude fading provide a better fit with the Rician distribution. The effects such as scattering, polarization, antenna radiation patterns, and waveguide which caused increase and decrease of the value of PL exponent and delay spread are also analysed. Results revealed that a directional narrow beam dual-polarized antenna configuration might be a good candidate in this environment.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"15 9","pages":"1063-1075"},"PeriodicalIF":1.7,"publicationDate":"2021-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12116","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41413815","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