Iet Microwaves Antennas & Propagation最新文献_第7页

IF 1.2 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2026-01-02

引用次数: 0

Coding 1-Bit Programmable Metasurface Based on Bayesian Learning With a Hierarchical Truncated Gaussian Mixture Prior Model 基于分层截断高斯混合先验模型贝叶斯学习的1位可编程元表面编码

IF 1.2 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-12-30 DOI: 10.1049/mia2.70079

Fang-Fang Wang, Yiqian Mao, Qing Huo Liu

{"title":"Coding 1-Bit Programmable Metasurface Based on Bayesian Learning With a Hierarchical Truncated Gaussian Mixture Prior Model","authors":"Fang-Fang Wang, Yiqian Mao, Qing Huo Liu","doi":"10.1049/mia2.70079","DOIUrl":"10.1049/mia2.70079","url":null,"abstract":"Emerging programmable metasurface technologies enable flexible manipulation of electromagnetic waves. However, the instantaneous design of corresponding code sequences remains a challenging problem. In this paper, a fast and reliable coding strategy for 1-bit programmable metasurfaces is proposed. Under the assumption that the reflection amplitudes for both ‘0’ and ‘1’ coding states are equal to unity, the original coding problem is first formulated as a linear inverse problem. Since the phase difference between ‘0’ and ‘1’ coding states is approximately <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>π</mi>\u0000 </mrow>\u0000 <annotation> ${uppi }$</annotation>\u0000 </semantics></math>, such a prior information is then exploited for addressing the linear inverse problem. Specifically, a hierarchical truncated Gaussian mixture (TGM) prior model is adopted to account for the feature of the unknowns. Moreover, the variational expectation maximisation (VEM) along with the generalised approximate message passing (GAMP) is used for Bayesian inference, significantly reducing the computational complexity. Several numerical examples are presented to illustrate the potential of the proposed coding scheme.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"20 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.70079","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145891642","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

IF 1.2 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-12-30

引用次数: 0

The Wide-Band Multisection Wilkinson Power Divider Based on RGW for X- and Ku-Band Applications X波段和ku波段应用中基于RGW的宽带多段威尔金森功率分配器

IF 1.2 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-12-23 DOI: 10.1049/mia2.70070

Reza Afroozeh, Gholamreza Dadashzadeh, Mahdi Khoshhali Roudposhti

{"title":"The Wide-Band Multisection Wilkinson Power Divider Based on RGW for X- and Ku-Band Applications","authors":"Reza Afroozeh, Gholamreza Dadashzadeh, Mahdi Khoshhali Roudposhti","doi":"10.1049/mia2.70070","DOIUrl":"10.1049/mia2.70070","url":null,"abstract":"This paper presents the design, simulation and fabrication of a wideband Wilkinson power divider (WPD) based on ridge gap waveguide (RGW) technology for operation in the X- and Ku-band frequency range (8–18 GHz). This paper describes the theoretical foundation and design process of the RGW power divider, followed by the development of the overall divider in two configurations: waveguide-fed and coaxial fed. Optimisation techniques were utilised to finalise the divider for fabrication and testing. Challenges in designing waveguide transitions using multiple structural configurations are discussed. The final divider was tested and validated with measurement. Results indicate that S11, S22 and S33 are below −10 dB, output port isolation (S23 and S32) is below −15 dB and transmission coefficients (S21 and S31) are approximately −3.5 dB. In the final simulation process, the optimal values of the isolation resistors were determined based on both software-based and theoretical methods. Moreover, by evaluating the maximum electric field in the RGW structure, a higher estimated average power-handling capability was obtained compared with other technologies.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"19 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.70070","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145825203","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

Low NF Active Quasi-Circulator Design Based on Noise Suppression Technique 基于噪声抑制技术的低NF有源准环行器设计

IF 1.2 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-12-18 DOI: 10.1049/mia2.70075

Zhan Chen, Chunxia Zhou, Wen Wu

引用次数: 0

Single-Layer Fourth-Order SIW Filtering Antenna With Controllable Radiation Nulls 具有可控辐射零点的单层四阶SIW滤波天线

IF 1.2 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-12-13 DOI: 10.1049/mia2.70074

Yun-Qiu Li, Shi-Shan Qi, Shu-Yang Wan, Wen Wu

引用次数: 0

Circularly Polarised Stacked Patch Antennas for X-Band Uplink/Downlink CubeSat Communication Systems 面向x波段上行/下行链路立方体卫星通信系统的圆极化堆叠贴片天线

IF 1.2 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-12-10 DOI: 10.1049/mia2.70072

Muhammad Mubasshir Hossain, Syed Salman Kabir, Saeed I. Latif

{"title":"Circularly Polarised Stacked Patch Antennas for X-Band Uplink/Downlink CubeSat Communication Systems","authors":"Muhammad Mubasshir Hossain, Syed Salman Kabir, Saeed I. Latif","doi":"10.1049/mia2.70072","DOIUrl":"10.1049/mia2.70072","url":null,"abstract":"In this article, multiple circularly polarised (CP) stacked patch antenna designs are proposed with different perturbation techniques that can be used in future CubeSat missions using NASA Near Earth Network (NEN) or Deep Space Network (DSN) ground stations. The stacked patches with different perturbations aim to optimise the axial ratio bandwidth of the antennas to cover both uplink and downlink frequency bands of NASA NEN/DSN. Combining the axial ratio bandwidth of the two stacked patches, proposed antennas can be made wideband or dual-band to replace multiple antenna systems for uplink and downlink communications. Proposed CP antennas provide the solution to overcome some of the major design challenges, such as antenna placement, limited space for solar cells and mass/volume constraints of CubeSats. The proposed antennas achieve axial ratio (AR) <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo><</mo>\u0000 </mrow>\u0000 <annotation> ${< } $</annotation>\u0000 </semantics></math> 3 dB bandwidths of 1.2–1.33 GHz (16%–17%) covering the X band uplink and downlink frequencies of NASA NEN. A dual-band antenna covering the uplink and downlink of NASA DSN is also achieved using the stacked patch antenna design. Alongside a wide axial ratio bandwidth, the antennas also offer a wide axial ratio beamwidth (maximum achieved <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mn>140</mn>\u0000 <mo>°</mo>\u0000 </mrow>\u0000 <annotation> $140{}^{circ}$</annotation>\u0000 </semantics></math>) and high RHCP gain (maximum 8.05 dBic gain achieved) RHCP gain. Results of the proposed designs were validated through prototype fabrication and measurements.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"19 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.70072","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145739405","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 and Analysis of a 2.45 GHz Microwave-Assisted Marble Drilling System With Near-Field Focused Radiation for Enhanced Material Processing 基于近场聚焦辐射的2.45 GHz微波辅助大理石钻孔系统设计与分析

IF 1.2 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-12-04 DOI: 10.1049/mia2.70061

Eser Can, Adnan Kaya, Ismail Akdag, Caner Murat, Irfan Kaya

{"title":"Design and Analysis of a 2.45 GHz Microwave-Assisted Marble Drilling System With Near-Field Focused Radiation for Enhanced Material Processing","authors":"Eser Can, Adnan Kaya, Ismail Akdag, Caner Murat, Irfan Kaya","doi":"10.1049/mia2.70061","DOIUrl":"10.1049/mia2.70061","url":null,"abstract":"This study investigates the application of microwave-assisted drilling systems as an alternative to conventional mechanical drilling for marble processing. By utilising microwave energy at a frequency of 2.45 GHz, this research demonstrates how microwave radiation can effectively soften marble surfaces, reduce required drilling force, and improve surface quality. Two specialised microwave probes, Reflector Microwave Drilling Design (R-MDD) and Microwave Drilling Design-Empty Center (MDD-EC), were designed and tested to optimise the energy transfer and thermal impact on different marble types, specifically Burdur Beige and Keciborlu Angel White. Through a combination of simulation (CST Studio Suite) and experimental analysis, electric field intensity, temperature distribution, and drilling depth have been evaluated. Results indicate that microwave-assisted drilling significantly decreases burr formation and enhances drilling efficiency by generating focused thermal zones within the marble. Additionally, the MDD-EC probe's hollow conductor design allows integration with supplementary devices such as vacuum motors to manage waste discharge during drilling. This work concludes that microwave-assisted systems offer a promising cost-effective solution for hard dielectric materials in the marble industry, with potential applications extending to other high-melting-point materials.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"19 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.70061","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145686359","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 Design Method of Reconfigurable Frequency Selective Surface Based on Image Generation and Database Establishment 基于图像生成和数据库建立的可重构频率选择曲面设计方法

IF 1.2 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-12-04 DOI: 10.1049/mia2.70067

Haotian Zhou, Lan Lu, Jun Ding

引用次数: 0

Slow-Wave HMSIW-SSPP Leaky-Wave Antenna With Phase-Shift Asymmetric Coupling for Continuous Beam Scanning 连续波束扫描相移非对称耦合慢波HMSIW-SSPP漏波天线

IF 1.2 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-12-04 DOI: 10.1049/mia2.70071

Yiming Zhang, Yuxi Liu, Sailing He

{"title":"Slow-Wave HMSIW-SSPP Leaky-Wave Antenna With Phase-Shift Asymmetric Coupling for Continuous Beam Scanning","authors":"Yiming Zhang, Yuxi Liu, Sailing He","doi":"10.1049/mia2.70071","DOIUrl":"10.1049/mia2.70071","url":null,"abstract":"A compact leaky-wave antenna (LWA) with innovative phase-shift asymmetric coupling for continuous beam scanning is presented. The antenna utilises a slow-wave half-mode substrate integrated waveguide with spoof surface plasmon polaritons (SW-HMSIW-SSPP) transmission line structure to achieve ultra-compact dimensions in both longitudinal and lateral directions. The radiation characteristic is achieved using sinusoidal modulation on the SSPP structure. To enable continuous beam scanning through broadside, a novel and simple phase-shift asymmetric coupling method is developed by placing sinusoidally modulated patches with π/2 phase shift on the metallised blind via-hole arrays. This approach effectively suppresses the open stopband (OSB) and enables continuous beam scanning from backward to forward directions without radiation degradation at broadside. A prototype of the proposed LWA is fabricated and characterised. The measured results demonstrate that the antenna with 12 unit-cells operates over a wide frequency range from 14.3 to 20.5 GHz with continuous beam scanning from −40° to +30°, while maintaining an ultra-compact aperture of only 6.67 λ0 × 0.27 λ0.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"19 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.70071","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145686094","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