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

Bandwidth enhancement of circularly polarised slot global navigation satellite systems antenna using an integrated filter-antenna approach 利用集成滤波器-天线方法增强圆极化槽式全球导航卫星系统天线的带宽

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-03-21 DOI: 10.1049/mia2.12154

Mostafa G. Aly, Yi Wang

引用次数: 0

Miniaturised high-isolation K-/Ka-band diplexer with 3D antarafacial channel integration using vertical quasi-coaxial matching network 利用垂直准同轴匹配网络集成 3D 反面通道的小型化高隔离 K-/Ka 波段双工器

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-03-17 DOI: 10.1049/mia2.12470

Yujin Zhou, Haoyu Wei, Jun Zhou, Chonghu Cheng, Yong Cheng

{"title":"Miniaturised high-isolation K-/Ka-band diplexer with 3D antarafacial channel integration using vertical quasi-coaxial matching network","authors":"Yujin Zhou, Haoyu Wei, Jun Zhou, Chonghu Cheng, Yong Cheng","doi":"10.1049/mia2.12470","DOIUrl":"10.1049/mia2.12470","url":null,"abstract":"A miniaturised high-isolation K-/Ka-band diplexer with exceeding adjacent channels using 3D antarafacial channel integration and vertical-quasi-coaxial-based matching network is proposed. For smaller size, lower loss and lower channel interference, the high-order low-pass filter for the K-band channel and the four-line-interdigital-coupled wideband bandpass filter for the Ka-band channel are respectively designed on two low-loss glass-based substrates, and these two substrates are integrated on the two antarafacial surface of the mounting board. The vertical-quasi-coaxial (VQC) embedded in the mounting board is not only used as three-dimensional (3D) interconnection of the two antarafacial channels but also designed as the constituent part of the matching/isolation network, and this can effectively decrease the impedance traction caused by the Ka-band filter for the K-band channel of the diplexer. In addition, four transmission zeros of the K-band filter are designed at the whole passband of the Ka-band channel to improve the isolation to the K-band channel for guaranteeing the performance of the diplexer at the Ka-band channel. Furthermore, working principle, design method and test solution of this proposed K-/Ka-band diplexer are well illustrated, and the high-isolation (>40 dB) in very adjacent wideband channels at K-band (18–23.5 GHz) and Ka-band (25.8–31.6 GHz) is achieved within a tiny size of 9 × 4 × 0.87 mm.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 4","pages":"291-296"},"PeriodicalIF":1.7,"publicationDate":"2024-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12470","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140166503","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

Mechanical azimuthal beam-steering Fabry–Perot resonator antenna with large deflection angle 具有大偏转角的机械方位角波束转向法布里-珀罗谐振器天线

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-03-12 DOI: 10.1049/mia2.12471

Yufeng Liu, Lele Zhu, Wenmei Zhang, Wensong Wang

{"title":"Mechanical azimuthal beam-steering Fabry–Perot resonator antenna with large deflection angle","authors":"Yufeng Liu, Lele Zhu, Wenmei Zhang, Wensong Wang","doi":"10.1049/mia2.12471","DOIUrl":"10.1049/mia2.12471","url":null,"abstract":"Continuous beam steering approach with minimal power consumption is highly desirable in modern antenna designs. A simple mechanical method for achieving beam steering in the Fabry–Perot resonator antenna (FPRA) is presented. It involves rotating the upper phase gradient metasurface (PGM) mechanically to change the aperture phase distribution, so the beam is continuously steered in the azimuthal plane while maintaining a large elevation angle. The proposed PGM unit cell comprises a hexagonal ring and patch printed on both sides of the substrate, along with a honeycomb lattice. A prototype antenna operating at 5.65 GHz is fabricated and measured to validate the feasibility. Measurement results show that the FPRA achieves a gain of 14.9 dBi, and can continuously steer its beam in the azimuthal plane with an elevation angle of around θ = 50°. Measured radiation patterns in eight azimuthal directions (φ = 0°, 45°, 90°, 135°, 180°, 225°, 270°, and 315°) are consistent with the simulated results. Compared with other electrical tuning methods, our design has a compact size and requires lower power for the PGM rotation.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 6","pages":"413-421"},"PeriodicalIF":1.7,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12471","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140114937","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

Design of integrated wideband WR34-band diplexer-antenna array module for exploration of monolithic metal 3-D printing for space applications 设计集成宽带 WR34 波段双工器-天线阵列模块，探索用于空间应用的单片金属 3-D 打印技术

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-03-08 DOI: 10.1049/mia2.12468

Povilas Vaitukaitis, Jiayu Rao, Kenneth Nai, Jiasheng Hong

{"title":"Design of integrated wideband WR34-band diplexer-antenna array module for exploration of monolithic metal 3-D printing for space applications","authors":"Povilas Vaitukaitis, Jiayu Rao, Kenneth Nai, Jiasheng Hong","doi":"10.1049/mia2.12468","DOIUrl":"10.1049/mia2.12468","url":null,"abstract":"The design of a wideband diplexer integrated with a 16-slot Continuous Transverse Stub (CTS) antenna array is presented. The diplexer-antenna array module covers the whole WR34 band. The Tx and Rx bands cover 21.7–26 and 27.5–33 GHz ranges, respectively. The diplexer is designed to have a 100 dB attenuation in the stopband and 40 dB isolation between the channels. The antenna array has a high gain, between 26.9 and 31 dBi, at the lowest and highest frequencies. For the preliminary exploration of monolithic metal 3-D printing of complex geometry integrated RF front ends, two prototypes were manufactured in AlSi10 Mg. One-piece fabrication eliminates complicated assembly, enhances reliability, and reduces weight, which is more desirable for space applications. Due to several factors, namely, an unpolished inner surface and imperfect printing quality, the diplexer had a poor measured performance. The measured results of the antenna array had a relatively better agreement with simulations. Although, the realised gain was affected by the much lower effective conductivity of the unpolished 3-D printed material. Hence, the measured realised gain was between 27.8 and 30.9 dBi in the 29–33 GHz range.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 4","pages":"280-290"},"PeriodicalIF":1.7,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12468","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140074231","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

Scattering from a semi-elliptical cavity with arbitrary orientation placed in a perfect electric conductor plane 完美电导体平面内任意方位半椭圆形空腔的散射

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-03-06 DOI: 10.1049/mia2.12466

Mehdi Bozorgi

引用次数: 0

The extended resonant modal theory and its applications 扩展共振模态理论及其应用

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-03-05 DOI: 10.1049/mia2.12469

Ruqi Xiao, Wen Geyi, Guo Yang, Wen Wu

引用次数: 0

High-gain tapered monopulse antenna based on octuple excitation method in diffusion bonding technology at W-band 基于扩散键合技术八倍激发方法的 W 波段高增益锥形单脉冲天线

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-03-05 DOI: 10.1049/mia2.12456

Adham Mahmoud, Takashi Tomura, Mauro Ettorre, David González-Ovejero, Ronan Sauleau, Jiro Hirokawa

{"title":"High-gain tapered monopulse antenna based on octuple excitation method in diffusion bonding technology at W-band","authors":"Adham Mahmoud, Takashi Tomura, Mauro Ettorre, David González-Ovejero, Ronan Sauleau, Jiro Hirokawa","doi":"10.1049/mia2.12456","DOIUrl":"10.1049/mia2.12456","url":null,"abstract":"The authors present the design, fabrication and testing of a W-band monopulse antenna. This antenna consists of three main building blocks: an array with 48 × 48 slots, a tapered corporate-feed network and a comparator. The comparator has four input ports to generate sum and difference patterns in orthogonal cardinal planes for monopulse operation. A novel octuple excitation is adopted for the corporate network to achieve a side lobe level lower than −20 dB for the sum patterns and simultaneously reduce drastically the manufacturing complexity. Diffusion bonding technology is used for fabrication. Twenty-four etched copper sheets with a thickness of 0.2 mm are stacked to realise the prototype. The total size of the antenna is <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mn>40.76</mn>\u0000 <mo>×</mo>\u0000 <mn>40.76</mn>\u0000 <mo>×</mo>\u0000 <mn>1.51</mn>\u0000 <msubsup>\u0000 <mi>λ</mi>\u0000 <mn>0</mn>\u0000 <mn>3</mn>\u0000 </msubsup>\u0000 </mrow>\u0000 <annotation> $40.76times 40.76times 1.51{lambda }_{0}^{3}$</annotation>\u0000 </semantics></math>, with λ0 being the wavelength at the centre frequency (94 GHz). The antenna presents an isolation better than 12 dB among the input ports in the 84–100 GHz band. The realised measured gain is 40.7 dBi at 94 GHz. The measured 3-dB gain bandwidth is 17.4%. The difference patterns at 94.0 GHz present null depths of −24.0, −18.0, −17.5, and −17.4 dB, in the E-, H-, 45°-, and 135°-planes, respectively.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 5","pages":"317-330"},"PeriodicalIF":1.7,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12456","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140054680","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 3D printed low-profile wideband circularly polarised elliptical integrated lens antenna 3D 打印扁平宽带圆极化椭圆集成透镜天线

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-02-29 DOI: 10.1049/mia2.12462

Bin Xu, Bing Zhang, Xiao An

{"title":"A 3D printed low-profile wideband circularly polarised elliptical integrated lens antenna","authors":"Bin Xu, Bing Zhang, Xiao An","doi":"10.1049/mia2.12462","DOIUrl":"10.1049/mia2.12462","url":null,"abstract":"The authors presents a low-profile wideband circularly polarised (CP) millimetre-wave (mmWave) elliptical integrated lens antenna (ILA) fabricated by dielectric 3D printing technology. The proposed lens is integrated with a dielectric polariser and an air cavity for phase compensation, which can transfer incident waves from linearly polarised (LP) to planar CP waves over a wide bandwidth. Compared to the classic bifocal ILA, the proposed lens has a low profile. The phase compensation is performed by introducing a specifically shaped air cavity, which greatly reduces the length and weight of the lens. The polariser causes the two electric field components Ex and Ey to degenerate with an orthogonal phase difference, which results in the wideband characteristics of the antenna. The polariser, air cavity and lens can be conveniently and precisely fabricated by low-cost 3D printing technology. Measurements show that the proposed ILA has a wide axial ratio (AR) bandwidth of 21.9–32.6 GHz, while the gain reaches 22.54 dBic with a 38% size reduction and a 60.7% weight reduction. Benefiting from the low profile, high gain, wide bandwidth and low cost, the proposed ILA has great potential to be the candidate antenna for 5G applications and satellite communications.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 4","pages":"272-279"},"PeriodicalIF":1.7,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12462","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140009935","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

Electromagnetic radiation estimation at the ground plane near fifth-generation base stations in China by using machine learning method 利用机器学习方法估算中国第五代基站附近地平面的电磁辐射

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-02-28 DOI: 10.1049/mia2.12467

Dan Shi, Wanqing Li, Keyi Cui, Cheng Lian, Xiaoyong Liu, Zheng Qi, Hui Xu, Juejia Zhou, Zhao Liu, Hua Zhang

{"title":"Electromagnetic radiation estimation at the ground plane near fifth-generation base stations in China by using machine learning method","authors":"Dan Shi, Wanqing Li, Keyi Cui, Cheng Lian, Xiaoyong Liu, Zheng Qi, Hui Xu, Juejia Zhou, Zhao Liu, Hua Zhang","doi":"10.1049/mia2.12467","DOIUrl":"10.1049/mia2.12467","url":null,"abstract":"A novel method based on machine learning is proposed to estimate the electromagnetic radiation level at the ground plane near fifth-generation (5G) base stations. The machine learning model was trained using data from various 5G base stations, enabling it to estimate the electric field intensity at any arbitrary radiation point when the base station provides service to different numbers of 5G terminals which are in different service modes. The inputs required for the model include the transmit power of the antenna, the antenna gain, the distance between the 5G base station and 5G terminals, terminal service modes, the number of 5G terminals and the environmental complexity around the 5G base station. Experimental results demonstrate the feasibility and effectiveness of the estimation method, with the mean absolute percentage error of the machine learning model being approximately 5.98%. This level of accuracy showcases the reliability of the approach. Moreover, the proposed method offers low costs when compared with on-site measurements. The estimated results can be utilised to reduce test costs and provide valuable guidance for optimal site selection, thereby facilitating radio wave coverage or electromagnetic radiation regulation of 5G base stations.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 6","pages":"391-401"},"PeriodicalIF":1.7,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12467","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140009928","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 single-layer reflective metasurface for high-efficiency polarisation conversion applications in C and X bands 用于 C 波段和 X 波段高效偏振转换应用的紧凑型单层反射元表面

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-02-26 DOI: 10.1049/mia2.12465

Kd. M. Raziul Islam, Ardavan Rahimian, Gabriel G. Machado, Muhammad Ali Babar Abbasi, Adnan Ahmad Cheema, Brian J. Meenan

{"title":"A compact single-layer reflective metasurface for high-efficiency polarisation conversion applications in C and X bands","authors":"Kd. M. Raziul Islam, Ardavan Rahimian, Gabriel G. Machado, Muhammad Ali Babar Abbasi, Adnan Ahmad Cheema, Brian J. Meenan","doi":"10.1049/mia2.12465","DOIUrl":"10.1049/mia2.12465","url":null,"abstract":"The authors design and experimentally analyse an anisotropic metasurface for the simultaneous conversions of linear cross and circular polarisations in the C and partial X bands. The proposed compact structure utilises a dual-cut square-ring resonator and a square patch on an FR4 substrate above a ground plane. The full-wave simulations exhibit over 92% efficiency in cross-conversion over a fractional bandwidth (BW) of 52.3%. The proposed metasurface efficiently converts linear to circular polarisation in two different bands, achieving left-hand circularly polarised and right-hand circularly polarised efficiencies exceeding 93% and 89%, respectively. The compact unit-cell with dimension 0.22λ × 0.22λ attains stable polarisation transformation efficiency rates exceeding 80% up to 40° incident angles. The design is adaptable for efficient wide BW across both lower and higher (millimetre-wave) frequencies through scaling. A prototype of the proposed polarisation converter (PC) was realised and validated effectively in measurements, aligning well with simulations. This PC features a novel and simple structure with multifunctional wideband operation, stable incident angle output, polarisation insensitivity, and scalability, making it an efficient front-end for various radio frequency applications, including polarisation control and polarisation transformers.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 5","pages":"369-381"},"PeriodicalIF":1.7,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12465","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139987620","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