International Journal of Microwave and Wireless Technologies最新文献_第3页

Multiband circularly-polarized stacked elliptical patch antenna with eye-shaped slot for GNSS applications 用于 GNSS 应用的带眼形插槽的多频带圆极化叠层椭圆贴片天线

IF 1.4 4区计算机科学

International Journal of Microwave and Wireless Technologies Pub Date : 2024-04-11 DOI: 10.1017/s175907872400045x

Ahmad Abdalrazik, Ahmed Gomaa, Asmaa Afifi

{"title":"Multiband circularly-polarized stacked elliptical patch antenna with eye-shaped slot for GNSS applications","authors":"Ahmad Abdalrazik, Ahmed Gomaa, Asmaa Afifi","doi":"10.1017/s175907872400045x","DOIUrl":"https://doi.org/10.1017/s175907872400045x","url":null,"abstract":"This paper introduces a tri-band stacked elliptical patch antenna featuring a right-handed circular polarized, designed to operate at the L2, L5, and L1 Global Navigation Satellite System bands. Initially, an elliptic patch is constructed and fed by a probe feed to generate TM110 and TM210 modes at resonance frequencies calculated using Mathieu functions. The probe position is precisely adjusted to excite the quasi-orthogonal mode of TM110 to generate circularly polarized (CP) waves at the L2 and L5 bands. Subsequently, an eye-shaped aperture is engraved into the elliptical patch to enhance the axial ratio (AR) beamwidth in the L2 and L5 bands and stimulate the orthogonal mode of TM210 to produce CP waves at the L1 band. Lastly, a stacked partially elliptical parasitic element is placed beneath the upper slotted elliptical patch to enhance the orthogonality of TM210 surface current versions and thus improve the AR beamwidth at the L1 band. The proposed antenna shows low reflection coefficient values at 1.12–1.33 (L2/L5), and 1.5–1.66 GHz (L1). The AR beamwidths are 133/213∘, 167/163∘, and 36/103∘ at two orthogonal cutplanes at L5, L2, and L1 bands, respectively. The antenna also has decent gains of 6–6.9 dBic across the three bands.","PeriodicalId":49052,"journal":{"name":"International Journal of Microwave and Wireless Technologies","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140576659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Absorptive reconfigurable bandstop filter with ultra-wide frequency tuning range using distributed lossy resonators 利用分布式有损谐振器实现具有超宽频率调谐范围的吸收型可重构带阻滤波器

IF 1.4 4区计算机科学

International Journal of Microwave and Wireless Technologies Pub Date : 2024-04-08 DOI: 10.1017/s1759078724000412

Qun Li

{"title":"Absorptive reconfigurable bandstop filter with ultra-wide frequency tuning range using distributed lossy resonators","authors":"Qun Li","doi":"10.1017/s1759078724000412","DOIUrl":"https://doi.org/10.1017/s1759078724000412","url":null,"abstract":"An absorptive reconfigurable bandstop filter (BSF) with compact size and ultra-wide frequency tuning range using distributed lossy resonators is presented. In each reconfigurable bandstop resonator, a varactor and a PIN diode are utilized as the control and absorption devices. When the PIN diodes are in off and on states, the upper and lower frequency tuning ranges of stopbands can be obtained, respectively. Therefore, the ultra-wide total frequency tuning range which is the combination of the upper and lower frequency tuning ranges can be realized. Meanwhile, the stopband frequency and bandwidth tuning can be independently controlled by bias voltages. The resistances in the varactors and PIN diodes can dissipate the electromagnetic power and thus result in absorptive stopband without using extra absorptive circuits. The stopband suppression level and stopband absorption ratio are proportional to the number of distributed lossy resonators. For demonstration, an absorptive reconfigurable BSF prototype using six pairs of distributed lossy resonators is designed and fabricated. The measured total frequency tuning range is 3.03–6.39 GHz (71%) with the suppression level of 20 dB, while the frequency tuning range with the suppression level of 10 dB is 2.04–6.39 GHz (103%).","PeriodicalId":49052,"journal":{"name":"International Journal of Microwave and Wireless Technologies","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140576821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A 4 × 4 Butler matrix with switching/steering beams based on new tunable phase difference couplers 基于新型可调相位差耦合器的带切换/转向光束的 4 × 4 Butler 矩阵

IF 1.4 4区计算机科学

International Journal of Microwave and Wireless Technologies Pub Date : 2024-04-08 DOI: 10.1017/s175907872300154x

Taleb Mohamed Benaouf, Abdelaziz Hamdoun, Mohamed Himdi, Olivier Lafond, Hassan Ammor

引用次数: 0

A single-layer multimode high gain circularly polarized metasurface antenna using CMA for C-band applications 用于 C 波段应用的使用 CMA 的单层多模高增益圆极化元面天线

IF 1.4 4区计算机科学

International Journal of Microwave and Wireless Technologies Pub Date : 2024-04-05 DOI: 10.1017/s1759078724000424

Deepak Gangwar, Ankit Sharma

{"title":"A single-layer multimode high gain circularly polarized metasurface antenna using CMA for C-band applications","authors":"Deepak Gangwar, Ankit Sharma","doi":"10.1017/s1759078724000424","DOIUrl":"https://doi.org/10.1017/s1759078724000424","url":null,"abstract":"This article presents an innovative design for a low-profile, high-gain circularly polarized (CP) antenna using a single-layer metasurface (MTS). The proposed design incorporates an MTS layer, comprising a 4 × 4 array of hexagonal-shaped patches, printed on the top layer of the substrate. The bottom layer features a coplanar waveguide-fed slotted ground. Circular polarization and broadside radiation are achieved through the application of characteristic mode analysis (CMA). CMA is employed to simultaneously excite desired modes, aiming for wideband circular polarization and gain enhancement. Experimental results validate the effectiveness of the design, with compact dimensions of 0.67λ0 × 0.67λ0 × 0.04λ0. The measurements demonstrate an impressive impedance bandwidth of 84.3% within the 3.7–9.1 GHz. Additionally, a 3-dB axial ratio bandwidth of 18.6% is observed between 4.96 and 5.98 GHz and 3.74% between 8.38 and 8.7 GHz. The antenna exhibits excellent radiation pattern characteristics, featuring a maximum gain of 10.08 dBi at 7.1 GHz. The radiation pattern is symmetrical with broadside directionality, making the antenna well-suited for sensing applications.","PeriodicalId":49052,"journal":{"name":"International Journal of Microwave and Wireless Technologies","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140576820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A compact UWB MIMO antenna augmented with isolation improvement structures in situ with ground stubs and slots 一种紧凑型 UWB 多输入多输出天线，在原位增加了隔离改进结构和接地桩与槽

IF 1.4 4区计算机科学

International Journal of Microwave and Wireless Technologies Pub Date : 2024-04-05 DOI: 10.1017/s1759078723001150

Jeet Banerjee, Abhik Gorai, Rowdra Ghatak

{"title":"A compact UWB MIMO antenna augmented with isolation improvement structures in situ with ground stubs and slots","authors":"Jeet Banerjee, Abhik Gorai, Rowdra Ghatak","doi":"10.1017/s1759078723001150","DOIUrl":"https://doi.org/10.1017/s1759078723001150","url":null,"abstract":"An orthogonally oriented microstrip-fed bi-element ultra-wideband (UWB) diversity antenna possessing a super-wide bandwidth, high isolation, and band rejection attributes is proposed. The intended diversity antenna uses a 2nd-order Cayley fractal tree-shaped neutralization line among a pair of radiating square monopoles along with additional components like extended ground stubs, hybrid Koch fractal parasitic elements, and an L-shaped defected ground structure to attain high isolation of <−20 dB over 3.1–18 GHz. To nullify the intervention from the existent wireless local area network band, a hybrid Koch–Minkowski slot is carved out from the radiators. A minimal inter-element spacing of 8 mm is attained with the suggested layout measuring 28 mm (L) × 42 mm (W) in extent. The numerical as well as experimental investigations of vital diversity attributes like the envelope correlation coefficient, mean effective gain, total active reflection coefficient, and multiplexing efficiency depict high diversity actualization. The consistency amidst the simulation as well as the empirical results recommends the worthiness of the intended antenna for handy UWB and UWB multiple-input multiple-output systems.","PeriodicalId":49052,"journal":{"name":"International Journal of Microwave and Wireless Technologies","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140577234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bandpass filter with multiple selective absorptive stopbands for 28 GHz transmitters 用于 28 千兆赫发射机的带多个选择性吸收阻带的带通滤波器

IF 1.4 4区计算机科学

International Journal of Microwave and Wireless Technologies Pub Date : 2024-04-05 DOI: 10.1017/s1759078724000394

Stefano Moscato, Steven Caicedo, Matteo Oldoni

引用次数: 0

Bioinspired planar switched beam network using Butler matrix on a flexible substrate targeting multifaceted millimeter-wave applications 在柔性基底上使用巴特勒矩阵的生物启发平面开关波束网络，瞄准毫米波的多方面应用

IF 1.4 4区计算机科学

International Journal of Microwave and Wireless Technologies Pub Date : 2024-04-02 DOI: 10.1017/s1759078724000400

Balaka Biswas, Ayan Karmakar

{"title":"Bioinspired planar switched beam network using Butler matrix on a flexible substrate targeting multifaceted millimeter-wave applications","authors":"Balaka Biswas, Ayan Karmakar","doi":"10.1017/s1759078724000400","DOIUrl":"https://doi.org/10.1017/s1759078724000400","url":null,"abstract":"This paper details the design and development of a planar switched beam network using 4 × 4 Butler matrix (BM) over a thin and flexible type biocompatible substrate. Four mils thick liquid crystal polymer (LCP) is used as a substrate here (ϵr = 2.92, tanδ = 0.002). The proposed design is centered at 28 GHz, targeting commercial millimeter-wave applications. Floral-shaped antenna with defective ground structures has been implemented as basic radiating elements. The whole structure is based on microstrip line configuration. The architecture occupies an area of 23.85 × 19.20 mm2 over the LCP substrate. Individual components of the BM are detailed here, followed by a system analysis of the whole integrated structure. The present work also covers the electrical equivalent circuit modeling of the whole beam-forming network. The fabricated prototype offers better than 18 dB return losses at each input port for the desired frequency band with 6 dBi (max.) peak gain and 500 MHz bandwidth around the center frequency. Port-to-port isolation of better than 15 dB is achieved with this topology. Experimental and simulated results are in good agreement in all aspects. A comparative study is also chalked out to highlight the significance of the current research work with respect to alike earlier reported structures.","PeriodicalId":49052,"journal":{"name":"International Journal of Microwave and Wireless Technologies","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140576725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Joint multitemporal SAR and optical mapping of urban changes 多时合成孔径雷达和光学联合绘制城市变化图

IF 1.4 4区计算机科学

International Journal of Microwave and Wireless Technologies Pub Date : 2024-03-22 DOI: 10.1017/s175907872400031x

David Marzi, Erith Munoz Rios, Antonietta Sorriso, Fabio Dell’Acqua, Paolo Gamba

引用次数: 0

An applicator for high-power rock comminution using microwave technology in the megawatt range 使用兆瓦级微波技术的大功率岩石粉碎应用器

IF 1.4 4区计算机科学

International Journal of Microwave and Wireless Technologies Pub Date : 2024-03-21 DOI: 10.1017/s1759078724000308

Yasin Alekajbaf, Dragos Dancila

{"title":"An applicator for high-power rock comminution using microwave technology in the megawatt range","authors":"Yasin Alekajbaf, Dragos Dancila","doi":"10.1017/s1759078724000308","DOIUrl":"https://doi.org/10.1017/s1759078724000308","url":null,"abstract":"The mining industry is heavily dependent on energy-intensive processes, such as rock breakage, which leads to significant operational costs. This paper explores microwave-assisted rock breakage as an innovative method to enhance the efficiency of comminution within the mining industry. It introduces a system that employs a Klystron microwave power source with a maximum output of 7.5 MW, using a $mathrm{TM}_{010}$ single-mode cavity at 3 GHz, to channel energy inside a specially designed rock cavity. The paper emphasizes the importance of designing an efficient microwave cavity for this system, focusing on the cavity’s design and simulation. Through both simulated results (using HFSS software) and experimental observations, the study reveals the promising application of microwave technology in the field of mining. The simulated frequency response of the designed cavity (S11) is −22 dB, it demonstrates significant potential for reducing both energy consumption and associated costs. Additionally, the designed cavity is fabricated from aluminum and filled with polyether ether ketone material. The measured frequency response (S11) of the cavity at 3 GHz is −17 dB.","PeriodicalId":49052,"journal":{"name":"International Journal of Microwave and Wireless Technologies","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140197834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An acceleration method employing sparse sensing matrix for fast analysis of the wide-angle electromagnetic problems based on compressive sensing 利用稀疏传感矩阵的加速方法，快速分析基于压缩传感的广角电磁问题

IF 1.4 4区计算机科学

International Journal of Microwave and Wireless Technologies Pub Date : 2024-03-18 DOI: 10.1017/s1759078724000291

Qi Qi, Xinyuan Cao, Yi Liu, Meng Kong, Xiaojing Kuang, Mingsheng Chen

引用次数: 0