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

Time domain response of corrugated transmission lines 波纹传输线的时域响应

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-11-14 DOI: 10.1049/mia2.12430

Chia Ho Wu, Wei Wang, Song Tsuen Peng, Zhenyu Qian, Jianqi Shen, Guoqiang Ye, Donghua Ni, Fang He, Linfang Shen, Bisheng Quan, Yajie Jiao

{"title":"Time domain response of corrugated transmission lines","authors":"Chia Ho Wu, Wei Wang, Song Tsuen Peng, Zhenyu Qian, Jianqi Shen, Guoqiang Ye, Donghua Ni, Fang He, Linfang Shen, Bisheng Quan, Yajie Jiao","doi":"10.1049/mia2.12430","DOIUrl":"10.1049/mia2.12430","url":null,"abstract":"In order to employ periodic corrugated microstrip lines for reducing or suppressing electromagnetic interference in high-speed or high-frequency circuits, a precise method is necessary to calculate and measure the characteristic impedance of periodic microstrip lines. The equation for characteristic impedance (depending on frequency) of lossless periodic microstrip lines was obtained based on the transfer matrix method. A time domain pulse was used to measure the instantaneous impedance of conventional microstrip lines, and when the instantaneous impedance does not change with distance, it can be identified as the characteristic impedance of microstrip lines. However, when the time-domain pulses are employed to measure the instantaneous impedance of periodic microstrip lines, rapid oscillations occur with distance. Therefore, a standard for spacing between adjacent grooves in the microstrip line can be suggested by analysing the interaction between the time-domain pulses and the microstrip line grooves. Once such a standard is satisfied, many grooves etched along the microstrip line would no longer be distinguished by the time-domain pulses. Such a principle and method can be used to determine the instantaneous impedance for the microstrip lines that have periodic grooves. On the other hand, when several periodic structures with different lattice constants coexist on a microstrip line, they can also be distinguished via the instantaneous impedance. A time domain reflectometer was used for measuring the instantaneous impedance of periodic microstrip lines, and the measured results are in agreement with the theoretical analysis.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 1","pages":"19-34"},"PeriodicalIF":1.7,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12430","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134954625","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

Wideband single-fed circularly polarised patch antenna 宽带单馈电圆极化贴片天线

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-11-13 DOI: 10.1049/mia2.12434

Liang Zhang, Jia Chen, Wenning Wang, Zihang Qi, Tongyu Ding

引用次数: 0

A multi-band open-ended waveguide antenna by using groove loading technique 使用凹槽加载技术的多波段开口波导天线

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-11-09 DOI: 10.1049/mia2.12413

Jing-Yi Zhang, Jin-Dong Zhang, Wen Wu, Da-Gang Fang

引用次数: 0

Miniaturised integrated passive device balun design with balanced amplitude and phase for Wi-Fi applications 适用于 Wi-Fi 应用的具有均衡振幅和相位的微型集成无源器件平衡器设计

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-11-08 DOI: 10.1049/mia2.12399

Qixiang Ren, Yazi Cao, Bo Yuan, Yanzhu Qi, Shichang Chen, Gaofeng Wang

引用次数: 0

Synthesis of flat-top beampatterns based on simple polynomial transforms of Gaussian excitations 基于高斯激励的简单多项式变换的平顶贝型的合成

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-11-01 DOI: 10.1049/mia2.12428

Goran Molnar, Dorian Ljubenko, Mile Šakić

引用次数: 0

A 0.45-V low-power low-noise amplifier using a wideband image-rejection technology 采用宽带图像抑制技术的 0.45 V 低功耗低噪声放大器

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-10-26 DOI: 10.1049/mia2.12432

Jian-Yu Hsieh, Wei-Ting Chen

{"title":"A 0.45-V low-power low-noise amplifier using a wideband image-rejection technology","authors":"Jian-Yu Hsieh, Wei-Ting Chen","doi":"10.1049/mia2.12432","DOIUrl":"10.1049/mia2.12432","url":null,"abstract":"A 0.45-V low-power wideband image-rejection low-noise amplifier (LNA) using Taiwan Semiconductor Manufacturing Company (TSMC) 0.18-μm CMOS process has been proposed. The supply voltage, power consumption and chip area of the proposed LNA can be reduced using forward body biasing, folded cascode topology and a feedback capacitor. Moreover, a wideband gain-enhancement-and-image-rejection (WGEIR) circuit including a variable resonant LC tank and a common-gate amplifier has been developed. The inductance of the variable resonant LC tank can enlarge the gain of the proposed LNA. The capacitance of the variable resonant LC tank can achieve the image rejection. Using the WGEIR circuit, gain enhancement and wideband image rejection can be achieved simultaneously. The variable inductors and capacitors are developed for suppressing wideband image signals and good image rejection ratio (IRR). The combination of the variable inductors and capacitors can achieve eight image-reject frequencies under three control voltages. The proposed LNA shows the measured results including a 10-dB power gain, a 3-dB noise figure (NF) and a −11-dBm input third-order intercept point (IIP3) at 2.4 GHz, respectively. The measured IRR ranges from 18 to 23 dBc around 3.6–4.5 GHz, which is 900-MHz image-reject bandwidth. The measured proposed LNA using the mentioned techniques consumes 0.8-mW power.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"17 15","pages":"1130-1138"},"PeriodicalIF":1.7,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12432","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134906118","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

Three-dimensional metal-only phoenix cell and its application for reflectarrays 三维纯金属凤凰电池及其在反射阵列中的应用

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-10-25 DOI: 10.1049/mia2.12431

Zhihang An, Tony Makdissy, María Garcia Vigueras, Sébastien Vaudreuil, Raphaël Gillard

{"title":"Three-dimensional metal-only phoenix cell and its application for reflectarrays","authors":"Zhihang An, Tony Makdissy, María Garcia Vigueras, Sébastien Vaudreuil, Raphaël Gillard","doi":"10.1049/mia2.12431","DOIUrl":"10.1049/mia2.12431","url":null,"abstract":"A 3D metal-only waveguide-based phoenix cell for reflectarray is presented. The proposed cell consists of two concentric square waveguides and a metallic block in the centre, which offers two operation modes. The first mode uses its cross section to tune reflection phase while the second mode varies the heights of two waveguides to manipulate reflection phase. The principle of the two different modes is analysed in detail. A metal-only reflectarray antenna at 20 GHz is designed based on the first mode of the phoenix cell. It is fabricated using selective laser melting 3D printing technology. A good agreement between simulations and measurements is achieved. The measured gain at 19.75 GHz is 30.25 dBi with an aperture efficiency of 51.17% respectively. Also, the measured 1-dB gain bandwidth is 15% (19–22 GHz). A dual band metal-only reflectarray operating at 20 and 25 GHz is designed based on the second mode of the phoenix cell. The two metal-only reflectarray antennas fully demonstrate the capabilities of the proposed 3D metal-only phoenix cell.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 4","pages":"211-219"},"PeriodicalIF":1.7,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12431","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135218182","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

Method of phase compensation and pattern transformation for array antennas with arbitrarily oriented circularly polarised elements 具有任意方向圆极化元件的阵列天线的相位补偿和模式转换方法

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-10-20 DOI: 10.1049/mia2.12429

Zhongtian Jing, Yubing Han

{"title":"Method of phase compensation and pattern transformation for array antennas with arbitrarily oriented circularly polarised elements","authors":"Zhongtian Jing, Yubing Han","doi":"10.1049/mia2.12429","DOIUrl":"10.1049/mia2.12429","url":null,"abstract":"The inconsistent polarised directions and the radiation pattern transformation of the elements need to be considered in the analysis and simulation of large circularly polarised conformal arrays. Without relying on full-wave simulations of the full array, a polarisation phase compensation and a pattern transformation method are proposed to solve these problems. When the position and orientation of the conformal array elements are known, the polarisation phase compensation method can provide a solution to keep the initial phase direction of each circularly polarised antenna element consistent in the global coordinate system. Then, a pattern transformation method is proposed to obtain the radiation pattern of each antenna in the global coordinate system. In this method, the local antenna polarised radiation patterns with amplitude and phase information are expressed in the global coordinate system through the mutual conversion relationship between the local and global coordinate systems. These methods can provide a guidance for array design and performance simulation, especially theoretically applicable to the arbitrary conformal arrays.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"17 15","pages":"1116-1129"},"PeriodicalIF":1.7,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12429","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135569269","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 scattering of H-polarised cylindrical wave by a double-sided impedance circular strip 双面阻抗圆带对 H 极化圆柱波的电磁散射

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-10-18 DOI: 10.1049/mia2.12425

Vasil Tabatadze, Ömer Faruk Alperen, Kamil Karaçuha

{"title":"Electromagnetic scattering of H-polarised cylindrical wave by a double-sided impedance circular strip","authors":"Vasil Tabatadze, Ömer Faruk Alperen, Kamil Karaçuha","doi":"10.1049/mia2.12425","DOIUrl":"10.1049/mia2.12425","url":null,"abstract":"The authors investigate electromagnetic scattering by a circular strip with impedance boundary conditions in detail. The excitation is obtained by the H-polarised line source and the impedance boundary condition with different impedance values on each surface of the circular strip is imposed. Electromagnetic scattering from circular strips is formulated employing an integral equation approach including the orthogonal polynomials while expressing the current densities on inner and outer surfaces. To consider the edge condition, the current density on the scatterer is expressed in terms of Gegenbauer polynomials with the weighting function. Unlike the previous studies, the authors investigate the behaviour of the EM field regarding the location of the cylinder source, the size of the aperture and the different impedance values. The convergence of the proposed approach, which is one of the analytical–numerical methods, is investigated for different impedance values; considering the results, resonators with impedance surfaces of certain complex values and certain locations of the cylinder source perform better than the known PEC and PMC resonators for some specific resonance cases. An effective analytical–numerical approach is proposed for such geometry with the impedance boundary condition. An extensive analysis and comparison with other methods are provided. The limit cases of the impedance boundary condition (Dirichlet and Neumann boundary conditions) are validated.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"17 15","pages":"1093-1105"},"PeriodicalIF":1.7,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12425","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135889153","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 circularly polarised multiple input multiple output antenna with single-sense for sub-6 GHz 5G applications 一种圆极化多输入多输出天线，单感测，适用于6 GHz以下的5G应用

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2023-10-13 DOI: 10.1049/mia2.12426

Zin Mar Phyo, Takafumi Fujimoto, Chai-Eu Gaun

{"title":"A circularly polarised multiple input multiple output antenna with single-sense for sub-6 GHz 5G applications","authors":"Zin Mar Phyo, Takafumi Fujimoto, Chai-Eu Gaun","doi":"10.1049/mia2.12426","DOIUrl":"https://doi.org/10.1049/mia2.12426","url":null,"abstract":"In this study, a compact wideband circularly polarised Multiple Input Multiple Output (MIMO) antenna with the two parasitic elements is proposed. The printed monopole antenna for wideband circular polarisation proposed in authors' previous study is used as an antenna element. One-sided substrate reflector is installed at the back side of the antenna, positioned 0.2λ0 away, to improve the gain. The circularly polarised radiation, deteriorated by the influence of mutual coupling of two antenna elements and reflector, is improved by deploying two parasitic elements on the bottom layer of the antenna's substrate. The antenna's size is 0.99λ0 × 0.32λ0 and the reflector's size is 1.41λ0 × 0.82λ0 (λ0 is the free-space wavelength at lowest operating frequency). The measured bandwidth of 10 dB impedance with a 3 dB axial ratio is 33.49% from 3.53 to 4.95 GHz, which can be utilised for sub-6 GHz 5G applications. The simulated and experimental results are compared to validate the antenna characteristics.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"17 14","pages":"1082-1092"},"PeriodicalIF":1.7,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12426","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"109168531","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