Iet Microwaves Antennas & Propagation最新文献_第2页

Breakthrough design of power handling capability-enhanced slotted oversized substrate-integrated waveguide power divider/combiner considering corona and thermal effects 考虑电晕和热效应的功率处理能力增强型开槽超大基板集成波导功率分配器/合路器的突破性设计

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-08-15 DOI: 10.1049/mia2.12502

Masoumeh Souri, Nasser Masoumi, Mahmoud Mohammad-Taheri

{"title":"Breakthrough design of power handling capability-enhanced slotted oversized substrate-integrated waveguide power divider/combiner considering corona and thermal effects","authors":"Masoumeh Souri, Nasser Masoumi, Mahmoud Mohammad-Taheri","doi":"10.1049/mia2.12502","DOIUrl":"https://doi.org/10.1049/mia2.12502","url":null,"abstract":"An analysis and design of a new slotted power divider/combiner (PDC) that utilises an oversized substrate-integrated waveguide (OS-SIW) is presented to enhance power handling capability (PHC). It is interesting to note that, the power capability tolerance can be increased by increasing the width of structure and thickness of the substrate, although it may introduce higher-order modes. The paper is focused on improving PHC of PDC that propagates only the TE10 mode while preventing the propagation of higher-order modes. Additionally, the PHC of the proposed structure is studied in detail. The air breakdown or the corona effect is a physical phenomenon that limits the Peak Power Handling Capability (PPHC) of a device. In slotted microwave components, the corona effect plays a crucial role in determining the PPHC, and it is closely related to environmental conditions such as pressure. Another limiting factor is self-heating, which affects the device's Average Power Handling Capability (APHC). The slotted OS-SIW PDC is designed on Rogers RO4003 laminate with 32mil thickness, offering a low profile with an overall OS-SIW PDC area of 170 × 55 mm2. The measured results of the fabricated PDC showcase a range of desirable features. Moreover, the proposed structure in power divider mode exhibits significant improvements in APHC compared to those of the conventional Substrate-Integrated Waveguides structures, with respective enhancements of approximately 8.26% at 10 GHz (with a Fractional Band Width of 58.3%). These advantages are highly beneficial and hold great potential.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 10","pages":"779-790"},"PeriodicalIF":1.1,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12502","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524583","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

Synthesis of sparse rectangular planar arrays with weight function and improved grey wolf optimization algorithm 利用权重函数和改进的灰狼优化算法合成稀疏矩形平面阵列

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-08-13 DOI: 10.1049/mia2.12499

Kui Tao, Bin Wang, Xue Tian, Qi Tang, Guihan Xie

{"title":"Synthesis of sparse rectangular planar arrays with weight function and improved grey wolf optimization algorithm","authors":"Kui Tao, Bin Wang, Xue Tian, Qi Tang, Guihan Xie","doi":"10.1049/mia2.12499","DOIUrl":"https://doi.org/10.1049/mia2.12499","url":null,"abstract":"The present article proposes a novel hybrid approach for addressing the synthesis problem of rectangular planar arrays under multiple constraints, through joint optimization of the weight function and the improved grey wolf optimization (IGWO) algorithm. Firstly, the grey wolf optimization (GWO) algorithm is improved by using tent chaotic mapping, nonlinear convergence factor, dominant wolf dynamic belief strategy, and opposition-based learning strategy to increase the population diversity and the ability to jump out of the local optimum. Secondly, the array elements are weighted using the weight function to generate the position distribution matrix, which reduces the thinned matrix optimization time and improves the optimization efficiency. Finally, the position distribution matrix is used to generate the thinned array, and the IGWO algorithm is applied to perform the sparse optimization with multiple constraints. The effectiveness of the method is verified through numerical simulation and full-wave simulation experiments, demonstrating its capability to enhance array antenna performance and reduce peak sidelobe level (PSLL). These experimental results hold significant engineering implications and provide valuable references for addressing the array distribution problem under multiple constraints.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 10","pages":"748-762"},"PeriodicalIF":1.1,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12499","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524576","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

A compact half-mode substrate integrated waveguide bandpass filter based on highly confined slow waves with loading capacitive patches 基于加载电容贴片的高约束慢波的紧凑型半模基底集成波导带通滤波器

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-08-12 DOI: 10.1049/mia2.12501

Ning-Ning Wang, De-Wei Zhang, Qing Liu, Hang Qian, Wei-Zhe Qu

引用次数: 0

Null-depth coordinated synthesis design approach to azimuthal null frequency scanning antennas 方位角空频扫描天线的空深协调合成设计方法

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-08-09 DOI: 10.1049/mia2.12500

Xiao-Hui Mao, Wen-Jun Lu, Fei-Yan Ji, Lei Zhu

引用次数: 0

Compact linear-phase bandpass filters with notched frequency response employing eighth-mode substrate integrated waveguide and dual-mode microstrip line structure 采用八模基底集成波导和双模微带线结构的具有缺口频率响应的紧凑型线性相位带通滤波器

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-08-06 DOI: 10.1049/mia2.12496

Hang Yang, Xiang Wang, Xian-Long Yang, Xiao-Wei Zhu, Wen Wu

{"title":"Compact linear-phase bandpass filters with notched frequency response employing eighth-mode substrate integrated waveguide and dual-mode microstrip line structure","authors":"Hang Yang, Xiang Wang, Xian-Long Yang, Xiao-Wei Zhu, Wen Wu","doi":"10.1049/mia2.12496","DOIUrl":"https://doi.org/10.1049/mia2.12496","url":null,"abstract":"A series of fourth-order bandpass filters (BPFs) with compact footprints, broad bandwidth, high selectivity, linear phase and notched response are proposed. The sketch of these BPFs is in accordance with the combination of the eighth-mode substrate integrated waveguide (EMSIW) and dual-mode microstrip line (DMML) resonators. The DMML resonator is constructed by means of metallic via-holes and pad in the double-layered structures. Among them, the DMML resonator can provide two transmission poles. Besides, the cross coupling is introduced through the vertical slot or fan-shaped aperture in the dual-layered substrates. The coupling schemes of the proposed BPFs can introduce two transmission zeros in the vicinity of operating passband, and the coupled scheme also exhibits a relatively flat in-band group delay. Notched frequency responses have been obtained by exploiting the U-shaped resonator and folded-ring resonator embedded with the mixed EMSIW and DMML BPFs. To validate the conceptual design, the proposed BPFs are simulated, fabricated and measured. Both the simulation and measurement have reached to a satisfactory agreement.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 9","pages":"691-701"},"PeriodicalIF":1.1,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12496","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142316865","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

A high-power, high-isolation, dual-polarised planar phased array antenna 高功率、高隔离度、双偏振平面相控阵天线

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-07-30 DOI: 10.1049/mia2.12498

Junxing Jiang, Shaoqiu Xiao, Yiming Zhang, Shaoyi Xie

{"title":"A high-power, high-isolation, dual-polarised planar phased array antenna","authors":"Junxing Jiang, Shaoqiu Xiao, Yiming Zhang, Shaoyi Xie","doi":"10.1049/mia2.12498","DOIUrl":"https://doi.org/10.1049/mia2.12498","url":null,"abstract":"A high-power, high-isolation, dual-polarised planar phased array antenna is presented. Based on a multi-layer microstrip structure, two sets of polarisation ports are fed through orthogonal slot coupling, achieving high isolation and low cross-polarisation. Double-layer radiation patches and cavity interlayers are used to expand the bandwidth and increase the gain. Metal vias are added around microstrip feeders and between array units to suppress surface waves, thereby improving the scanning performance of the phased array. A smooth gradient microstrip structure is designed to improve the power capacity while realising broadband impedance matching. The measured results show that in the 8–10 GHz frequency band, the isolation of the dual polarisation ports is greater than 50 dB, and the impedance bandwidth reaches 22.2%, with active VSWR <1.5 when not scanning. Both sets of polarisation can achieve 2-D beam scanning in the range of E-plane ±20° and H-plane ±40° without grating lobes, maintaining the scan loss below 2.4 dB, cross-polarisation below −20 dB and active VSWR <2. Each unit achieves a high gain of 7.4 dB and large power capacity of 5 kW; so the entire 8 × 8 phased array can achieve a main lobe gain of 25.5 dB and realise high-power directional radiation with the effective isotropic radiated power of 92.5 dBm. The proposed planar antenna has a low profile of 5.5 mm (0.17λ0).","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 9","pages":"702-713"},"PeriodicalIF":1.1,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12498","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142316965","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

Multi-band millimetre wave indoor directional channel measurements and analysis for future wireless communication systems 未来无线通信系统的多波段毫米波室内定向信道测量与分析

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-07-17 DOI: 10.1049/mia2.12494

Amar Al-Jzari, Sana Salous

{"title":"Multi-band millimetre wave indoor directional channel measurements and analysis for future wireless communication systems","authors":"Amar Al-Jzari, Sana Salous","doi":"10.1049/mia2.12494","DOIUrl":"https://doi.org/10.1049/mia2.12494","url":null,"abstract":"Single-input single-output (SISO) three-dimensional (3D) wideband indoor directional measurements collected in a factory environment and an office environment at 38 and 70 GHz are presented. 3D single-input multiple-output (SIMO) dual polarised measurements with 1 × 2 antenna configurations were also carried out in a meeting room, a conference room, and an office room at the 60 GHz band. The measurements cover both azimuth and elevation by rotating the directional antenna (RDA) at the receiver side. Different statistical channel parameters such as power delay profile, power angle profile, root-mean-square delay spread, angular spread, and path loss were estimated for different possible antenna orientations between the transmitter and the receiver, which include line-of-sight, obstructed line-of-sight, and non-line-of-sight. The polarisation effects on path loss models and the delay and angular spread models based on the surface area of the environment are studied. The results will be valuable for the design of indoor millimetre wave cellular networks.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 9","pages":"667-680"},"PeriodicalIF":1.1,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12494","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142316663","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

A passive beamforming hemispherical liquid antenna using a simple metal ball 使用简单金属球的无源波束成形半球形液体天线

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-07-15 DOI: 10.1049/mia2.12497

Viswanadh Raviteja Gudivada, Yi Huang, Elliot L. Bennett

引用次数: 0

Design of an electrically small printed square loop antenna for closely spaced Tx/Rx systems 为间距较近的 Tx/Rx 系统设计电气尺寸较小的印刷方形环形天线

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-07-15 DOI: 10.1049/mia2.12491

Nhat Truong, Sanghamitro Das, Satish K. Sharma

{"title":"Design of an electrically small printed square loop antenna for closely spaced Tx/Rx systems","authors":"Nhat Truong, Sanghamitro Das, Satish K. Sharma","doi":"10.1049/mia2.12491","DOIUrl":"https://doi.org/10.1049/mia2.12491","url":null,"abstract":"A highly miniaturised electrically small square loop antenna has been designed for operation at 2.5 GHz. The antenna is loaded using a simple series combination of two lumped inductors and two interdigitated capacitors in order to realise inherent impedance matching at a given miniaturisation level with respect to a specified source impedance, without using any external matching network. The designed antenna has an overall size of 0.061λ0 × 0.061λ0, which is approximately 75.6% miniaturised in terms of total loop length and 94% miniaturised in terms of overall footprint. The designed antenna is fabricated and the corresponding impedance matching and radiation patterns are measured, which are found to be in reasonable agreement with their simulated counterparts. Moreover, an investigation with two closely spaced electrically small SLAs, one for transmitting and the other for receiving, is carried out in this work in pursuit of maximising the isolation, which plays a crucial role in the Tx/Rx systems.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 10","pages":"723-730"},"PeriodicalIF":1.1,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12491","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524722","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

Malfunctioning conformal phased array: Radiation pattern recovery with particle swarm optimisation 故障保形相控阵：利用粒子群优化恢复辐射模式

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-07-15 DOI: 10.1049/mia2.12495

Hina Munsif, Irfan ullah

{"title":"Malfunctioning conformal phased array: Radiation pattern recovery with particle swarm optimisation","authors":"Hina Munsif, Irfan ullah","doi":"10.1049/mia2.12495","DOIUrl":"https://doi.org/10.1049/mia2.12495","url":null,"abstract":"The electronic beam steering in conformal phased arrays is formed by exciting the multiple antennas with appropriate phase shifts. However, the malfunctioning of phase shifters connected to the central antenna elements in the conformal array distorts the radiation pattern of the array system severely as compared to edge elements resulting in the reduction of the array gain and increase in the side lobe levels. Here, the authors propose a non-dominated sorting multi-objective particle swarm optimisation (NS-MOPSO) technique capable of recalculating the independent phases of working antenna elements in the array in such a manner as to correct the overall radiation pattern. To illustrate the radiation pattern's recovery capabilities of the optimisation technique in case of malfunctioning of any random phase shifter(s), a 1 x 7 microstrip patch antenna array operating at 2.45 GHz on a wedge-shaped conformal structure was designed in CST simulator. To test, the radiation pattern's recovery capabilities of the NS-MOPSO approach, phase shifters connected to the antenna elements in the array were made to malfunction. Then the optimisation algorithm recalculates the phases for individual antenna elements to achieve the desired corrected radiation pattern. The simulated and measured radiation pattern recovery results are in good agreement with each other.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 9","pages":"654-666"},"PeriodicalIF":1.1,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12495","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142316807","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