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Iet Microwaves Antennas & Propagation最新文献

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Feeding-line-based decoupling patch antennas 基于馈线的去耦贴片天线
IF 1.1 4区 计算机科学
Iet Microwaves Antennas & Propagation Pub Date : 2024-07-01 DOI: 10.1049/mia2.12484
Hui Gu, Hang Qi, Yue Zhao, Lei Ge, Wenjing Zhang
{"title":"Feeding-line-based decoupling patch antennas","authors":"Hui Gu,&nbsp;Hang Qi,&nbsp;Yue Zhao,&nbsp;Lei Ge,&nbsp;Wenjing Zhang","doi":"10.1049/mia2.12484","DOIUrl":"https://doi.org/10.1049/mia2.12484","url":null,"abstract":"<p>Mutual coupling among multiple antennas has been a problem needed to be tackled in multiple-input-multiple-output (MIMO) systems. A decoupling method based on short decoupling feeding lines (DFLs) for MIMO patch antennas is proposed. The decoupling method utilises the feeding transmission line to create a new coupling path between the closely placed patch antennas. By adjusting the intensity and phase of the introduced new coupling, the original coupling can be cancelled out. The proposed method can realise both E- and H-plane decoupling. A 1 × 2 H-plane MIMO patch antenna array is first presented to explain the decoupling mechanism. Then, two practical examples of 2 × 2 and 4 × 4 MIMO patch antenna arrays are designed, fabricated and measured. The results indicate that the port isolation can be apparently improved from 15 to 38 dB for H-plane coupling and from 19 to 35 dB for E-plane coupling at the centre frequency of 3.5 GHz. Moreover, the proposed method is promising to be applied in arrays with other antenna type by adjusting the position and size of short DFLs.</p>","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 8","pages":"593-600"},"PeriodicalIF":1.1,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12484","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141991644","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 scheme for mitigating coupling interference in dual-band shared-aperture base station antenna 缓解双频共享孔径基站天线耦合干扰的组合方案
IF 1.1 4区 计算机科学
Iet Microwaves Antennas & Propagation Pub Date : 2024-07-01 DOI: 10.1049/mia2.12481
Xiaochi Lu, Jiahao Wang, Yanwen Zhao, Dexin Zhao
{"title":"Combined scheme for mitigating coupling interference in dual-band shared-aperture base station antenna","authors":"Xiaochi Lu,&nbsp;Jiahao Wang,&nbsp;Yanwen Zhao,&nbsp;Dexin Zhao","doi":"10.1049/mia2.12481","DOIUrl":"https://doi.org/10.1049/mia2.12481","url":null,"abstract":"<p>A dual-band shared-aperture antenna array is presented, involving a combined scheme to suppress mutual coupling interference. The proposed array is comprised of a low-band (LB) antenna, a frequency selective surface (FSS), sixteen high-band (HB) antennas, and a reflector. The LB antenna utilises electromagnetic transparent (ET) characteristics to minimise scattering interference, while the FSS isolates resonance interference and port signal interference. The combined scheme integrates the benefits of both the ET antenna and FSS to suppress mutual coupling interference effectively. A prototype of the proposed antenna was fabricated and measured, operating at 1.7–2.7 GHz and 3.3–3.9 GHz. The simulated and measured results demonstrate stable patterns for both the LB antenna and the HB antennas. The cross-band isolation is higher than 28 dB in the low-band. With these advantages, the antenna array is suitable for base station applications.</p>","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 8","pages":"563-570"},"PeriodicalIF":1.1,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12481","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141991643","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
Randomised orthogonal matching pursuit algorithm with its application in fast analysis of wide-angle electromagnetic scattering problems based on compressive sensing 随机正交匹配追求算法及其在基于压缩传感的广角电磁散射问题快速分析中的应用
IF 1.1 4区 计算机科学
Iet Microwaves Antennas & Propagation Pub Date : 2024-06-27 DOI: 10.1049/mia2.12489
Qi Qi, Yunuo Fan, Xinyuan Cao, Yi Liu, Meng Kong, Zhixiang Huang, Xianliang Wu
{"title":"Randomised orthogonal matching pursuit algorithm with its application in fast analysis of wide-angle electromagnetic scattering problems based on compressive sensing","authors":"Qi Qi,&nbsp;Yunuo Fan,&nbsp;Xinyuan Cao,&nbsp;Yi Liu,&nbsp;Meng Kong,&nbsp;Zhixiang Huang,&nbsp;Xianliang Wu","doi":"10.1049/mia2.12489","DOIUrl":"https://doi.org/10.1049/mia2.12489","url":null,"abstract":"<p>The wide-angle electromagnetic scattering problems can be rapidly solved by using the method of moments in conjunction with compressive sensing theory. The method mainly has two computational parts: measurement and recovery. To further enhance the performance, an improved orthogonal matching pursuit algorithm with a randomised atom selection process is proposed, significantly reducing the computational complexity of the recovery part. Additionally, a restart mechanism is designed to eliminate possible errors that might occur during the random process, ensuring the accuracy of recovery results. Numerical experiments with objects of different shapes validate the effectiveness and efficiency of the proposed scheme.</p>","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 9","pages":"646-653"},"PeriodicalIF":1.1,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12489","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142316986","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
Novel numerical analysis of electric fields in the near field of very-low-frequency antennas based on the charge simulation method 基于电荷模拟法的极低频天线近场电场数值分析新方法
IF 1.1 4区 计算机科学
Iet Microwaves Antennas & Propagation Pub Date : 2024-06-24 DOI: 10.1049/mia2.12488
Bo-Yu Ren, Xian-Qiang Li, Yuan-Cheng Qin, Hao Du, Liang-Chang Fei, Rui Huang
{"title":"Novel numerical analysis of electric fields in the near field of very-low-frequency antennas based on the charge simulation method","authors":"Bo-Yu Ren,&nbsp;Xian-Qiang Li,&nbsp;Yuan-Cheng Qin,&nbsp;Hao Du,&nbsp;Liang-Chang Fei,&nbsp;Rui Huang","doi":"10.1049/mia2.12488","DOIUrl":"https://doi.org/10.1049/mia2.12488","url":null,"abstract":"<p>Very-low-frequency (VLF) transmitting antennas have a crucial influence on the nearby electromagnetic environment. Commercial software packages, such as CST Studio Suite (CST) or Altair FEKO (FEKO), are always utilised to calculate the electric fields of VLF antennas, which consume considerable computing resources and time. The classical method of electric field calculation, the charge simulation method (CSM), is first applied to the calculation of electric field near the VLF transmitting antenna. The distribution characteristics of three-dimensional electric fields were analysed. The electric field surrounding the antenna exhibited axial symmetry. The highest electric field strength was at the top of the antenna, and as the distance from the antenna increased, the electric field strength exponentially decreased. The comparisons are performed between the results of the CSM and those of commercial software, the average relative errors of CSM on two observation paths are very small, 2.20% and 2.21%, respectively. Meanwhile, the CSM shows considerable advantages in saving calculation resources and improving efficiency. Additionally, the comparison between CSM calculation and the measured data is carried out. The results show that this method can accurately calculate the electric field near VLF transmitting antenna and offer valuable insights and a new solution.</p>","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 8","pages":"618-628"},"PeriodicalIF":1.1,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12488","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141991566","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 propagation modelling for open-confined mixed space using a hybrid ray-tracing/waveguide theory method 利用射线跟踪/波导理论混合方法为开放封闭混合空间建立高效传播模型
IF 1.1 4区 计算机科学
Iet Microwaves Antennas & Propagation Pub Date : 2024-06-18 DOI: 10.1049/mia2.12487
Zhenyu Zhao, Hao Qin, Junhong Wang, Weibin Hou, Xingqi Zhang
{"title":"Efficient propagation modelling for open-confined mixed space using a hybrid ray-tracing/waveguide theory method","authors":"Zhenyu Zhao,&nbsp;Hao Qin,&nbsp;Junhong Wang,&nbsp;Weibin Hou,&nbsp;Xingqi Zhang","doi":"10.1049/mia2.12487","DOIUrl":"https://doi.org/10.1049/mia2.12487","url":null,"abstract":"<p>The accurate prediction of radio wave propagation along highways plays an important role in the design of high-speed highway communication systems. The open-confined mixed space is a connection zone between the open space and confined tunnel along the highway. A hybrid propagation model is presented based on ray-tracing (RT) and waveguide theory, for the efficient modelling of open-confined mixed space. The proposed model employs RT to predict radio waves emitted by sources with arbitrary radiation patterns in open space sections, and utilises the waveguide theory approach to accelerate the prediction process in the confined tunnel sections. Both two-ray and six-ray RT models are included to take into account the suburban and urban environments. Numerical results are compared with simulated results generated by RT as well as experimental measurements. The validity and usefulness of the proposed model are demonstrated in an actual open-confined mixed space environment.</p>","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 8","pages":"608-617"},"PeriodicalIF":1.1,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12487","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141991739","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 fully metallic multi-mode waveguide antenna for cellular communications 用于蜂窝通信的紧凑型全金属多模波导天线
IF 1.1 4区 计算机科学
Iet Microwaves Antennas & Propagation Pub Date : 2024-06-11 DOI: 10.1049/mia2.12485
Ali Mokhtarani, Zahra Ghattan Kashani, Miguel Navarro-Cía
{"title":"Compact fully metallic multi-mode waveguide antenna for cellular communications","authors":"Ali Mokhtarani,&nbsp;Zahra Ghattan Kashani,&nbsp;Miguel Navarro-Cía","doi":"10.1049/mia2.12485","DOIUrl":"https://doi.org/10.1049/mia2.12485","url":null,"abstract":"<p>The needed isolation between elements for high-performance beam steering array antennas is a challenging task especially when the distance between the antenna elements is reduced. To tackle this problem, the authors report a multi-port multi-mode single-antenna with beam steering capability (±7 deg) suitable for cellular communications. The multi-port multi-mode characteristic of the proposed antenna enables size reduction and better taper efficiency than antenna arrays operating in the 3.3–3.7 GHz cellular band. The reported antenna exploits four Transverse Electric modes to modify the half-power beamwidth of the radiation from 20° to 41° as required in cellular communication.</p>","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 8","pages":"585-592"},"PeriodicalIF":1.1,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12485","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141991656","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
W-band single-layer circularly-polarised antenna based on compact gap waveguide 基于紧凑型间隙波导的 W 波段单层圆极化天线
IF 1.1 4区 计算机科学
Iet Microwaves Antennas & Propagation Pub Date : 2024-06-08 DOI: 10.1049/mia2.12486
Zheng Liu, Shi-Shan Qi, Yingrui Yu, Wen Wu
{"title":"W-band single-layer circularly-polarised antenna based on compact gap waveguide","authors":"Zheng Liu,&nbsp;Shi-Shan Qi,&nbsp;Yingrui Yu,&nbsp;Wen Wu","doi":"10.1049/mia2.12486","DOIUrl":"https://doi.org/10.1049/mia2.12486","url":null,"abstract":"<p>A single-layered W band circularly polarised (CP) antenna array fed by a sequential feeding network using compact gap waveguides (GWs) with reduced pins is presented. The radiating element consists of a pair of cross slots and an open-ended rectangular cavity integrated into the top metal plate of the GW. A sequential rotation network (SRN) consisting of hybrid groove gap waveguide (GGW) and ridge gap waveguide (RGW) structure is presented. Due to the fact that conventional GWs with multiple rows of pins occupy large lateral size, thus making them difficult to realise a single-layered CP array fed by SRN. Compared with conventional GW with multiple rows of pins, compact GGW with a single row of pins is deployed here to make the presented SRN more compact, thus combining SRN and multiple CP radiators in the same layer. Particularly, a comprehensive investigation on the choice of the GGW groove depth is carried out. The groove depth is designed carefully such that the electric-field energy is more confined along the GGW line, and less rows of pins are required. For proof-of-concept demonstration, the proposed array has been fabricated and measured, exhibiting an overlapped bandwidth of 10.64% (89–99 GHz) and a peak gain of 19.48 dBi at 94 GHz. It presents a promising candidate for W band wireless applications.</p>","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 8","pages":"601-607"},"PeriodicalIF":1.1,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12486","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141991570","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 minimum blind area model for system and interference uncertainty 针对系统和干扰不确定性的高效最小盲区模型
IF 1.1 4区 计算机科学
Iet Microwaves Antennas & Propagation Pub Date : 2024-06-03 DOI: 10.1049/mia2.12482
Yu Guo, Songhu Ge, Jin Meng
{"title":"Efficient minimum blind area model for system and interference uncertainty","authors":"Yu Guo,&nbsp;Songhu Ge,&nbsp;Jin Meng","doi":"10.1049/mia2.12482","DOIUrl":"https://doi.org/10.1049/mia2.12482","url":null,"abstract":"<p>In the anti-interference of broadband communication radio, interference cancellation performance is seriously affected by the uncertainty of the working frequency selection of the communication system and the direction of hostile interference. The closed-form solution of the interference cancellation weight value and the signal-to-interference noise ratio after the cancellation are derived and simplified to clarify the factors affecting interference cancellation quality. Then, the efficient blind area criterion is established for the low computational complexity in view of cancellation quality, which combines the radio communication index and anti-interference demand index. Based on this criterion, the minimum blind area model is proposed for robust performance. The experimental results in the auxiliary antenna spacing optimisation are consistent with the theoretical analysis, verifying the effectiveness of the proposed model in dealing with uncertain communication frequency and interference direction. It is very promising in communication interference cancellation.</p>","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 8","pages":"571-577"},"PeriodicalIF":1.1,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12482","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141991567","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 beamwidth and beam direction reconfigurable antenna based on multi-mode parasitic coupling 基于多模寄生耦合的波束宽度和波束方向可重构天线
IF 1.1 4区 计算机科学
Iet Microwaves Antennas & Propagation Pub Date : 2024-05-30 DOI: 10.1049/mia2.12483
Haoran Zhao, Binyun Yan, Weixing Sheng
{"title":"A beamwidth and beam direction reconfigurable antenna based on multi-mode parasitic coupling","authors":"Haoran Zhao,&nbsp;Binyun Yan,&nbsp;Weixing Sheng","doi":"10.1049/mia2.12483","DOIUrl":"https://doi.org/10.1049/mia2.12483","url":null,"abstract":"<p>A beamwidth (BW) and beam direction (BD) reconfigurable antenna based on multi-mode parasitic coupling is proposed. Two pairs of metal strips connected by only two positive-intrinsic-negative diodes are added as parasitic structures over the driven element, a circular microstrip patch, constituting a simple antenna design. By controlling the diode switching state, four pattern reconfigurable modes can be realised. Two beam-pointing deflection modes in the <i>E</i>-plane are realised based on the Yagi–Uda principle. Besides, the BW reconfigurability is achieved due to a joint effect of the Yagi principle and beam-stacking principle. All the reconfigurable modes share a 10% impedance bandwidth from 5.8 to 6.3 GHz. Simulation and measurement results show that the BW can be switched between 67° and 120° in an omni-directional plane, and the BD can be switched between 0° and ±30° in the <i>E</i>-plane.</p>","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 8","pages":"578-584"},"PeriodicalIF":1.1,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12483","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141991642","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
Determining the parameters of a dielectric ellipsoid for minimising front echo in Gaussian pulse scattering analysis 在高斯脉冲散射分析中确定介质椭球参数以最小化前回波
IF 1.1 4区 计算机科学
Iet Microwaves Antennas & Propagation Pub Date : 2024-05-23 DOI: 10.1049/mia2.12480
Emre İşcan, Vasil Tabatadze, Sebahattin Eker
{"title":"Determining the parameters of a dielectric ellipsoid for minimising front echo in Gaussian pulse scattering analysis","authors":"Emre İşcan,&nbsp;Vasil Tabatadze,&nbsp;Sebahattin Eker","doi":"10.1049/mia2.12480","DOIUrl":"https://doi.org/10.1049/mia2.12480","url":null,"abstract":"<p>A novel numerical method is introduced for minimising the presence of scattering echoes in the frontal area of a dielectric ellipsoid through the application of the method of auxiliary sources (MAS) method. This approach utilises a Gaussian radio pulse that spans the frequency spectrum from 0 to 6 GHz. The approach involves determining the properties of an ellipsoid, such as its dimensions and a dielectric permittivity, using a specially developed MATLAB software package to make this ellipsoid invisible. This provides a valuable military and defence technology tool, particularly for stealth and invisibility technology applications. It is beneficial for avoiding detection by radar systems utilised for enemy surveillance and identifying concealed objects. This aims to eliminate the need for metamaterials for invisibility cloaking. The suggested methodology has been confirmed through a validation process, which involved a comparison of the outcomes derived from numerical experiments conducted during pulse echo observations using the FDTD method and an analytical solution. MAS offers a notable advantage over other methods and commercial software by significantly reducing computational time for simulating and analysing 3D dielectric objects. This allows for quicker consideration of various parameter scenarios and optimisation for desired outcomes.</p>","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 7","pages":"552-562"},"PeriodicalIF":1.1,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12480","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141730218","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
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