Iet Microwaves Antennas & Propagation最新文献_第9页

A general N-arm Archimedean spiral antenna synthesis method for broadband multiple orbital angular momentums generation 宽带多轨道角动量产生的广义N臂阿基米德螺旋天线合成方法

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-01-09 DOI: 10.1049/mia2.12331

Yang Yang, Fei Shen, Zhen Zhang, Guangmin Zhang, Longfang Ye, Yubin Gong

{"title":"A general N-arm Archimedean spiral antenna synthesis method for broadband multiple orbital angular momentums generation","authors":"Yang Yang, Fei Shen, Zhen Zhang, Guangmin Zhang, Longfang Ye, Yubin Gong","doi":"10.1049/mia2.12331","DOIUrl":"https://doi.org/10.1049/mia2.12331","url":null,"abstract":"Due to the orthogonality, multiple orbital angular momentums (OAMs) have great potential for increasing communication capacity and improving imaging resolution. In this work, a general N-arm Archimedean spiral antenna (ASA) synthesis method is proposed for generating broadband vortex waves carrying multiple OAMs. In the proposed method, the theoretical formulas of the whole OAM modes based on the improved current band theory for N-arm ASA and the maximum common bandwidth of each N-adjacent OAM mode are presented. The performance of the proposed method is verified by simulated results of three-arm ASA, as well as simulated results and measured results of four-arm ASA. The measured results show that the four-arm ASA generates vortex waves carrying OAM modes of l = 0, 1, 2, 3 in 0.6–3, 1.4–3.8, 2.3–4.1 and 2.6–4.5 GHz. And the maximum common bandwidth of the four generated OAM modes is 2.6–3 GHz, which satisfies the design requirement of OAM's practical application.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"17 2","pages":"140-150"},"PeriodicalIF":1.7,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12331","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50126129","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

Compact front module with integrated miniaturised antenna in package for parabolic reflector antenna in satellite ground terminals 紧凑型前置模块，封装集成小型天线，用于卫星地面终端中的抛物面反射器天线

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-01-06 DOI: 10.1049/mia2.12334

Yuxin Ren, Yinan Sun, Qifeng Gao, Junwen Tang, Zhongjun Yu, Zheng Xu, Peng Wu

{"title":"Compact front module with integrated miniaturised antenna in package for parabolic reflector antenna in satellite ground terminals","authors":"Yuxin Ren, Yinan Sun, Qifeng Gao, Junwen Tang, Zhongjun Yu, Zheng Xu, Peng Wu","doi":"10.1049/mia2.12334","DOIUrl":"https://doi.org/10.1049/mia2.12334","url":null,"abstract":"A compact front module with integrated miniaturised antenna in package for parabolic reflector antenna is presented for GEO-KOMPSAT-2A (GK-2A) satellite ground terminal application at 1692 MHz. The active feeder antenna module consists of four parts: a pair of miniaturised slot antennas, a pair of differential feeding lines, a metal shielding box, and front circuits, including a low noise amplifier (LNA) and a surface acoustic wave bandpass filter (SAW BPF). To reduce the lateral size of the feeder antennas and obtain required radiation patterns, meandered radiation slots are suggested and fed by a pair of differential coplanar waveguide (CPW) lines. The antenna substrate serves as the module cover and the electromagnetic shielding with a lateral size of 48 × 48 mm2 (0.27 × 0.27 <math>\u0000 <semantics>\u0000 <mrow>\u0000 <msup>\u0000 <mi>λ</mi>\u0000 <mn>2</mn>\u0000 </msup>\u0000 </mrow>\u0000 <annotation> ${lambda }^{2}$</annotation>\u0000 </semantics></math>). Additionally, the feeder antenna module is proven to work with the specified parabolic reflector, both in theory and simulation. The front module with the packaged antenna is fabricated, and the measured output gain exceeds 20 dBi within a desired narrow band. Moreover, the module also achieves excellent performance in the GK-2A satellite signal-receiving experiment when used to feed the parabolic reflector antenna. The entire front module exhibits good package integration and application performance.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"17 2","pages":"169-182"},"PeriodicalIF":1.7,"publicationDate":"2023-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12334","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50133281","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

Beam-steering capability for OAM-based reflectarray at 5G-mmWave frequencies 5G毫米波频率下基于OAM的反射阵列的波束控制能力

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2022-12-30 DOI: 10.1049/mia2.12333

Ali Ali, Mohsen Khalily, Tim Brown, Rahim Tafazolli

引用次数: 3

Stochastic FDTD for stochastic problems with axial symmetry 轴对称随机问题的随机FDTD

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2022-12-26 DOI: 10.1049/mia2.12329

Xutong Wang, Wenbing Wang, Congguang Mao, Mo Zhao, Zheng Liu, Yifu Zhou

引用次数: 1

Wideband and low-profile beam-tilted H-plane horn array based on MMPTE 基于MMPTE的宽带低剖面波束倾斜H平面喇叭阵列

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2022-12-26 DOI: 10.1049/mia2.12332

Yun Zhao, Aizhong Wang, Fan Ye, Jiangqiao Ding, Geyi Wen

{"title":"Wideband and low-profile beam-tilted H-plane horn array based on MMPTE","authors":"Yun Zhao, Aizhong Wang, Fan Ye, Jiangqiao Ding, Geyi Wen","doi":"10.1049/mia2.12332","DOIUrl":"https://doi.org/10.1049/mia2.12332","url":null,"abstract":"A wideband and low-profile H-plane horn antenna array is proposed to achieve a tilted-beam in H-plane based on the theory of maximum power transfer efficiency (method of maximum power transfer efficiency (MMPTE)), which is built on bent corrugated substrate integrated waveguide structure. The horn array is implemented in the substrate with the thickness of 0.13 <math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>λ</mi>\u0000 <mn>0</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation> ${boldsymbol{lambda }}_{mathbf{0}}$</annotation>\u0000 </semantics></math> at the centre frequency. The arc-shaped aperture is employed to achieve smooth transition from horn aperture to the free space, which also improve the front-to-back ratio of the radiation pattern. In order to realise a tilted-beam, MMPTE is used to obtain the excitation distribution of array elements. A double-layer butler matrix feed network is built based on the calculated excitation, maintaining the characteristic of broadband and miniaturisation simultaneously. Measured VSWR parameter of the proposed antenna is less than 2.0 from 6 to 18 GHz. The antenna achieves a beam titling of ±6° in H-plane. It is observed that the measured results agree well with the simulated ones.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"17 2","pages":"151-161"},"PeriodicalIF":1.7,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12332","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50144268","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

Compact Ka-band conical beam filtenna 紧凑型Ka带锥形光束滤波器

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2022-12-09 DOI: 10.1049/mia2.12326

Qi Shi-Shan, Zhu Keren, Wu Wen

{"title":"Compact Ka-band conical beam filtenna","authors":"Qi Shi-Shan, Zhu Keren, Wu Wen","doi":"10.1049/mia2.12326","DOIUrl":"https://doi.org/10.1049/mia2.12326","url":null,"abstract":"A compact conical beam antenna composed by a filtering power divider (FPD) and circular open waveguide is presented. In order to reduce insertion loss in Ka-band, the five-way radial power divider and the cascaded filters are constructed using metallic waveguides. The filter is based on the principle of the magnetic field inversion characteristics of higher-order mode resonances, using TE101 and TE102 over-mode bypass coupling to create a pair of transmission zeros around the passband. A more compact folded structure is obtained by placing adjacent cavities back-to-back. Finally, TM01 mode on the circular aperture is excited by the output of the FPD, realising a conical beam radiation pattern. This proposed antenna works at the central frequency of 35 GHz, the maximum elevation angle of θ = 20° and the measured gain of 7.83 dBi have been achieved. The results shows that the impedance bandwidth is 6.29%, from 33.85 to 36.05 GHz. In terms of miniaturisation, the size of the entire antenna is 3.85λ0<math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo>×</mo>\u0000 </mrow>\u0000 <annotation> $times $</annotation>\u0000 </semantics></math>2.51λ0.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"17 3","pages":"208-215"},"PeriodicalIF":1.7,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12326","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50125522","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

Stopband enhanced patch-type filter using common-mode feeding method based on multilayer liquid crystal polymer lamination technology 基于多层液晶聚合物叠层技术的共模馈电阻带增强贴片滤波器

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2022-12-05 DOI: 10.1049/mia2.12328

Feng Huang, Khaled Aliqab, Meshari Alsharari, Jiayuan Lu

引用次数: 0

Design of a low-profile, dual-mode, dual-port and single-band antenna with very high isolation for wireless body area network applications 一种适用于无线体域网应用的低剖面、双模、双端口、高隔离度单波段天线的设计

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2022-11-21 DOI: 10.1049/mia2.12322

Salma Mirhadi, Zeinab Poorjalili, Nader Komjani

引用次数: 0

Impact of anomalous surface boundary conditions on the planar negative-refractive index lens 反常表面边界条件对平面负折射率透镜的影响

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2022-11-19 DOI: 10.1049/mia2.12325

Kimberley W. Eccleston

{"title":"Impact of anomalous surface boundary conditions on the planar negative-refractive index lens","authors":"Kimberley W. Eccleston","doi":"10.1049/mia2.12325","DOIUrl":"https://doi.org/10.1049/mia2.12325","url":null,"abstract":"It is shown that anomalous boundary conditions at the surface of a negative-refractive-index metamaterial planar lens severely diminishes the resolution of the lens when its relative permittivity and permeability are both −1. Anomalous boundary conditions arise in practical microwave metamaterials that are typically a periodic array of identical unit cells comprising dielectric and conducting elements. For a unit-cell size much smaller than the wavelength, homogenised permittivity and permeability are the constituent parameters of the average fields. Average fields vary on a scale larger than the unit cell size compared to localised fields associated with the constituent elements. Unlike the tangential components of the localised field, tangential components of the average fields are discontinuous across the surface of such materials. This anomalous boundary condition at the lens surface must be described by generalised sheet transition conditions. This study develops expressions for the negative-refractive-index lens optical transfer functions, as a function of spatial frequency, for transverse-electric waves, that account for anomalous surface boundary conditions. Both the simulations and experimental data are used to verify the expressions at a frequency of 3 GHz.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"17 2","pages":"118-131"},"PeriodicalIF":1.7,"publicationDate":"2022-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12325","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50138345","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

Efficient electromagnetic analysis of multi-layer and multi-scale periodic/quasi-periodic structures 多层多尺度周期/准周期结构的高效电磁分析

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2022-11-17 DOI: 10.1049/mia2.12306

Pengfei Wen, Xingjun Wang

{"title":"Efficient electromagnetic analysis of multi-layer and multi-scale periodic/quasi-periodic structures","authors":"Pengfei Wen, Xingjun Wang","doi":"10.1049/mia2.12306","DOIUrl":"https://doi.org/10.1049/mia2.12306","url":null,"abstract":"To increase the electromagnetic analysis efficiency, the fast and memory efficient discontinuous Galerkin time-domain (DGTD) method, which can simulate expeditiously the multi-scale and multi-layer periodic/quasi-periodic structures, is proposed in this study. For one thing, this method is highly targeted for multi-layer quasi-periodic structures. It realises that the quasi-periodic structure is extended from one layer to multiple layers. At the same time, the unit cells of the structure are no longer the conventional square lattice, and the sizes of different types of unit cells cannot be required for the same. For another, the implicit–explicit Runge–Kutta (ImEx-RK) time stepping scheme has been widely employed for time integration, which can break the limitation of the Courant–Friedrichs–Levy condition. However, the ImEx-RK time stepping scheme had been an under-explored domain in periodic/quasi-periodic structures, so it was introduced into the memory efficient DGTD method to decrease the simulation time. That is, the electrically coarse and fine subdomains in the multiscale periodic/quasi-periodic structures can be separated such that implicit schemes can be utilised in the fine subdomains. The correctness and advance of this method are proved by several classical numerical examples.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"17 1","pages":"1-12"},"PeriodicalIF":1.7,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12306","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50136050","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