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Design of dual circular polarized stacked patch antenna for BeiDou navigation satellite systems J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-03-26 Parthasarathy Ramanujam, Manimaran Ponnusamy
In this article, a design of two-layered, dual circular-polarization (CP) and dual-band path antenna is presented for BeiDou navigation satellite (BDS) system applications. A single 50-Ω Co-axial p...
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Development of a novel flattened magnetron for household microwave oven J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-03-25 Hailong Li, Wenlong Li, Dongdong Xie, Shibin Xu, Xiangwei Tang, Safi Ullah, Abdur Rauf, Liangjie Bi, Bin Wang, Yong Yin, Lin Meng
This paper presents a design scheme of a Novel Flattened Magnetron for Household Microwave Oven, which makes a breakthrough in the magnetic circuit of the existing magnetron and adopts the symmetri...
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A novel design of modified I-shaped low profile broadband cavity-backed SIW slot antenna J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-03-24 Lavudya Srinivas, Gande Arun Kumar, Gopi Ram
This article proposes a novel procedure to enhance the bandwidth of substrate-integrated waveguide (SIW) slotted antennas. By introducing a rectangular slot on the cavity's bottom surface, the TE21...
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Electromagnetics theory-based new equation to improve harmonically tuned power amplifier theory and design J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-03-24 Syed Enamur Rahaman, Santanu Dwari, Saad Mekhilef
Power amplifiers (PA) are used to boost the power of signals. Recently, harmonically tuned power amplifiers (HTPA) offer high efficiency and wider bandwidth than conventional PA. HTPA achieves by s...
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Metasurface-inspired circularly polarized patch antenna using DGS for sub 6-GHz applications J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-03-25 Ramya Radhakrishnan, Shilpi Gupta
A novel circularly polarized metasurface inspired regular triangle patch antenna (RTPA) with enhanced gain and bandwidth is proposed in this paper. The antenna is composed of a triangular patch-dri...
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Efficient monostatic anisotropic point scatterer model for high performance computing J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-03-13 Eric Huang, Madhavan Swaminathan
High performance computing (HPC) electromagnetic (EM) emulators are used to simulate real-time EM wave interactions between numerous radar targets. Radar Cross Section (RCS) data stores reflection ...
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Multilayer printed antennas and arrays for 5G applications J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-03-11 Harry F. Contopanagos
In this paper we describe a class of printed patch antennas that involve 3 metal layers completely integrated within a single dielectric, which are of very high efficiency and significant gain. The...
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A miniaturized airplane blade antenna for radio navigation and communication systems J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-03-11 Z. Hamouda, S. Azaizia, M. Nehaoua, M. F. Hammouche, T. Lasri
Blade antennas are preferred antenna structures for airborne applications due to their compact size, lightweight and drag-reducing aerodynamic shape. In this paper, we present the design, simulatio...
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A novel design methodology for asymmetric coupled line passive devices and its application in impedance transformers J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-03-11 Yan Zhang, Bin Xia, Junfa Mao
This article presents a novel design methodology for asymmetric coupled line passive devices. Based on the extraction of distributed parameters of coupled lines from S-parameters, we re-derived mod...
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Ultra-thin and omnidirectional reflectionless absorbing surface working at dual-frequency J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-03-07 Tian Peng, Lixia Yang, Tianyi Zhou
Materials with characteristics of omnidirectional reflectionless absorption are of great importance in electromagnetic shielding and anechoic chamber. Recently emerged absorbing surfaces mostly wor...
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Design and mathematical modeling of DNG metamaterial having six-band capabilities with high effective medium ratio J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-03-07 Binod Kumar Kanaujia, Praveen Chaurasia
In this paper, six-band double negative (DNG) metamaterial with a substantially high effective medium ratio (EMR) under the S and C microwave band is designed and investigated for multiple microwav...
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Polarization diversity configuration of millimeter wave MIMO antenna for Ka-band application in 5G wireless networks J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-03-04 Poonam Tiwari, Vishant Gahlaut, Upendra Narayan Mishra, Anshuman Shastri, Meenu Kaushik
A compact MIMO antenna has been designed explicitly for Ka-band for 5G wireless networks. The antenna uses four P-shaped radiating patches in E-shaped slots for polarization variety in the 20-40 GH...
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Design of a fractal triple-band reconfigurable filtering antenna for multiband applications J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-03-01 Sangeeta Das, Pankaj Sarkar
This letter constitutes a novel triple-band reconfigurable filtering antenna used for Bluetooth, WiMAX and WLAN applications. First, a compact triple-band reconfigurable filter is instigated which ...
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Localized waves and interaction solutions to an integrable variable coefficient Date-Jimbo-Kashiwara-Miwa equation J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-02-27 Jinzhou Liu, Xinying Yan, Meng Jin, Xiangpeng Xin
This paper initiates an exploration into the exact solutions of the variable coefficient Date-Jimbo-Kashiwara-Miwa equation, first utilizing the Painlevé analysis method to discuss the integrabilit...
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Three-octave supercontinuum spanning with Z-cut lithium niobate photonic waveguide J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-02-26 Kiran Ilyas, Qaisar Abbas Naqvi
We numerically demonstrate three-octave supercontinuum generation using the z-cut lithium niobate waveguide by dispersion engineering. The photonic waveguide structure is designed to exhibit anomal...
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High-power ultra-wideband power-combining technique based on microstrip line and ridge waveguide J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-02-25 Biao Sun
Based on microstrip-line power divider and ridge-waveguide power combiner, a high-power ultra-wideband solid-state power-combining amplifier is designed and fabricated. The Measured results show th...
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Corner T-slot antenna at 2.45 GHz for hyperthermia application J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-02-25 Azharuddin Khan, Satya Kesh Dubey, Amit Kumar Singh
This study focuses on the design and characterization of a novel T-slot antenna for hyperthermia application at 2.45 GHz. The simulation and experimental results demonstrate that the antenna has a ...
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Wideband Ka-band printed dipole array antenna with parasitic trapezoidal patch J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-02-25 Chung-Yi Li, Yi-Jyun Liao, Eric S. Li, Chao-Hsiang Liao, Huayan Jin, Yi-Da Chen, Kuo-Sheng Chin
This work presents a printed Ka-band dipole array antenna with wide bandwidth for millimeter-wave communication applications. The operating band of the proposed antenna ranges from 27.8–38.2 GHz ex...
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A novel fast roll-off bandpass frequency selective surface for stealth applications J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-02-25 Gundu Venkatesh, Surya Pal Singh, M. Thottappan
A novel frequency selective surface (FSS)-based spatial bandpass filter for TM-polarized waves is reported. The unit cell of the proposed FSS consists of a dielectric substrate with two conducting ...
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A CPW-fed wideband four-port MIMO slot antenna with high isolation for sub-6G applications J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-02-22 Chengzhu Du, Yongli Ren
This paper presents a high isolation four-port MIMO slot antenna for sub-6G applications. Four antenna elements are placed vertically to form vertical polarization. In addition, etching trapezoidal...
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A wideband 1 bit reconfigurable transmitarray antenna based on proximity-coupled feed patch element J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-02-22 Xiuwen Tian, Lizhong Song
In this paper, a wideband 1-bit reconfigurable transmit array antenna (RTA) is proposed. The 1-bit RTA element consists of a passive receiving antenna and a reconfigurable radiating antenna, which ...
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Ultra-wideband absorber based on graphene surface with polarization insensitivity under large angles J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-02-20 Zhefei Wang, Ziru Hou, Junxiang Ge, Fayu Wan, Qingsheng Zeng, Mingxin Song, Jianqiang Hou, Larbi Talbi, Tayeb A. Denidni
In this paper, a frequency-selective absorber with large-angular stability under oblique incidence is present. The absorptivity of the structure can be reached to maximum by impedance matching and ...
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Analysis of binary huygens metasurfaces under non-planar illumination J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-02-16 I. Derafshi, N. Komjani
In this article, we have investigated the effect of using a real feed on the performance of one-dimensional binary Huygens metasurfaces (BHMS). The designed structure has variable periods and each ...
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Performance analysis of real-time multi-wavelength nonlinear DRA for the next-generation photonic network J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-02-13 Anand Prakash, Sharbani Roy, Jaisingh Thangaraj, Jitendra K. Mishra
A new disintegrated channelization approach for the backward pumped nonlinear distributed Raman amplifier is proposed by enacting the differential coupled equations of Raman amplification, in fiber...
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Design of compact UWB antenna using characteristic mode analysis and its quad-port MIMO realization with novel isolation technique J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-02-12 Prabir Ghosh, Abhik Gorai, Subhrakanta Behera, Rowdra Ghatak
This paper presents a miniaturized Quad-Port MIMO antenna for UWB application. Employing Characteristic Mode Analysis, the single element UWB antenna is analysed to achieve a compact design. Using ...
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Comparative analysis of divergence of tipper imaging with natural and orthogonal electric sources J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-02-12 Shengbao Yu, Hongwei Wang, Changsheng Liu, Ying Guo, Jinlin Huang, Haigen Zhou
The divergence of the tipper (DT) is an important imaging method characterized by fast imaging speed and high lateral resolution. It has been recently adopted from the natural source airborne elect...
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Ensuring the maximum amplitude of the electric field strength in given coordinates using a linear antenna array focused on a finite distance J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-02-09 Denis Iuzvik, Maksim Stepanov
The paper considers the possibility of forming the maximum amplitude of the electric field strength at a given point in space using a linear antenna array focused on a finite distance. Since the lo...
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Multi-objective design method for high-power microwave source devices based on preferred PIC/gNSGA-II J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-02-01 Yulan Hu, Dagang Liu, Chenglin Liu, Laqun Liu, Huihui Wang
To solve the challenging problem of multi-objective optimization for high-power microwave sources, a specialized preference-based multi-objective optimization method, namely PIC/gNSGA-II, is propos...
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Polarization-independent wideband meta-material absorber based on resistor-loaded hexagonal ring resonators J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-01-25 Abhinav Kumar, Jayanta Ghosh
A polarization-independent meta-material-based absorber with wideband response is presented in this study. The proposed absorber’s unit cell consists of a resistance-loaded metallic hexagonal ring ...
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Frequency-multiplexed multifunctional coding metasurface based on transmission and reflection modes J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-01-25 Mingxiu Han, Yubiao Du, Juan Xu
In this work, a frequency-multiplexed multifunctional coding metasurface is proposed, which can realize focusing lens at the lower frequency and multiple scattering beams at the higher frequency. T...
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Graphene-based patch antenna array on photonic crystal substrate at terahertz frequency band J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-01-25 Chandan Kumar, Sanjeev Kumar Raghuwanshi, Vikram Kumar
In this paper, initially a photonic crystal is proposed with a periodic air gap and its performance is investigated at terahertz frequencies by varying the radius of the air gap. Then a microstrip ...
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Analysis of electromagnetic wave ignition mechanism and calculation of power threshold in underground coal mine J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-01-25 JiJian Meng, ZiWen Guo, Yong Zhang, JianWen Xu, ZiHan Li
This study critically assesses the potential risks associated with the implementation of 5G radio frequency signals in coal mines. The empirical findings underscore that, under uniform excitation c...
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Design, simulation, and measurement of near-zero-index shells for electromagnetic beam generation J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-01-25 Özgür Eriş, Özgür Ergül
We present design and simulation of three-dimensional (3D) shell structures, which generate directional radiation patterns from isotropic sources thanks to their near-zero-index (NZI) characteristi...
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Optimization of magnetic coupling structure of electric vehicle wireless charging DD coil J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-01-25 Zhiwei Chen, Zhengpan Wang, Shuiqing Xu, Anjiang Li, Qipei Zhou, Xiang Li
The charging coil plays an important role in the wireless charging system system. However, there are still some problems in the design of the wireless charging coil, such as the low coupling coeffi...
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Analysis of wave propagation through inhomogeneous left and right-handed media using the SPPS method J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-01-23 J. A. López-Toledo, R. Castillo-Pérez, H. Oviedo-Galdeano
Solutions of the wave equation are analyzed considering the propagation of electromagnetic fields through a non-homogeneous stratified metamaterial medium. These solutions are obtained by two metho...
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Modal analysis of a half-mode substrate integrated waveguide-fed slot-coupled dual-band patch antenna J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-01-22 Rakesh Kumar Chandan, Srikanta Pal
This manuscript presents comprehensive modal analysis of a compact, half-mode SIW-fed slot-coupled dual-band antenna. The Characteristic Mode Analysis (CMA) is investigated in detail and presented ...
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Single-wideband and dual-band bandpass filters based on compact quadruple-mode resonator J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2024-01-18 Ali Kürşad Görür, Engin Doğan, Adnan Görür
A stub-loaded U-shaped microstrip resonator (U-SLR) exciting two odd-modes and two even-modes and its applications to single-wideband and dual-band bandpass filter (DB-BPF) are introduced. The para...
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Active control of electromagnetic fields in layered media J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-12-26 Chaoxian Qi, Shubin Zeng, Neil Jerome A. Egarguin, Daniel Onofrei, Jiefu Chen
This article presents a numerical strategy for actively manipulating electromagnetic (EM) fields in layered media. In particular, we develop a scheme to characterize an EM source that will generate...
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Failure diagnosis for time-modulated arrays based on compressed sensing J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-12-26 Guo Bai, Cheng Liao, You-Feng Cheng, Yuanzhi Liu, Ju Feng, Xuanming Zhong
Time-modulated arrays (TMAs) have a high design degrees of freedom (DoFs) to improve radiation performance, while they are prone to failure due to their hardware characteristics. In this article, w...
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Finding the polarizability of dielectric half-ellipse J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-12-26 Mehwish Nisar, Sidra Batool, Fabio Mangini, Henrik Wallén, Ari Sihvola, Fabrizio Frezza
This article studies the electrostatic response of a two-dimensional dielectric half-ellipse. A semianalytical method is presented for solving the polarizability of a half-ellipse as a function of ...
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An optically transparent coplanar L-probe fed antenna based on capacitively coupled array of patches J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-12-26 Pingle Liang, Juan Chen
An optically transparent antenna fed by a coplanar L-probe is proposed in this paper. Indium-doped tin oxide (ITO) with a sheet resistance of 3.5 Ω/sq etched on a soda-lime glass substrate is used ...
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Miniaturized wide-band dual-polarized tightly coupled array for 5G millimeter-wave smartphones J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-12-26 Chan Bai, Shuai Zhang, Zixuan Song, Yuguo Liu, Zepu Wang
This paper presents a miniaturized wide-band dual-polarized tightly coupled dipole antenna for 5G millimeter-wave smartphones. The proposed antenna realizes miniaturization to avoid any grating lob...
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Modelling Pennes’, bioheat transfer equation in thermoelasticity with one relaxation time J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-12-26 Shreen El-Sapa, Alaa A. El-Bary, Wedad Albalawi, H. M. Atef
In this study, we develop the heat conduction equation for bio-thermoelastic skin tissue with one relaxation time using Penne’s principle, the first law of thermodynamics, and the second law of the...
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A novel defected ground structure for high-isolation circularly polarized MIMO patch antenna J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-12-26 Duc-Nguyen Tran Viet, Hung Tran-Huy, Dinh Nguyen Quoc, Hyun Chang Park
This paper introduces a method to reduce mutual coupling in a two-element multiple-input multiple-output (MIMO) antenna, which is a significant challenge due to the need for high isolation over a w...
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An efficient determination of field distributions in E-plane dielectric loaded waveguides J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-12-26 Ahmet Aydoğan
This paper proposes a new, fast, and efficient method for determining the electromagnetic field distribution in two-port E-plane dielectric-loaded uniform rectangular waveguides. The analysis regio...
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A wideband, thin profile and enhanced gain microstrip patch antenna modified by novel mushroom-like EBG and periodic defected ground structures J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-12-26 Cemile Tangel, Nigar Berna Teşneli
This paper presents a wideband, thin-profile and enhanced-gain microstrip patch antenna improved by using a novel mushroom-like Electromagnetic Band Gap (EBG) structure and forming periodic Defecte...
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Design and verification of a tunable single-band metamaterial based on Polymeric Methyl Methacrylate and its feasibility for temperature detection in smart packaging J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-12-15 Chengliang Wu, Nanguang Su, Ge Huang
Metamaterial absorbers with single resonance mode and narrow bandwidth are often used in sensing. A metamaterial absorber containing dielectric layers of the same thickness (Polymeric Methyl Methac...
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Ultra-broadband perfect absorber based on sub-grating structure J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-11-27 Haoyang Fan, Zheng Qin, Jian Yu
This paper introduces an ultra-broadband perfect absorber. The absorber comprises just two layers. By introducing sub-grating structures in the groove of the rectangle grating, a broadband absorber...
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Miniaturized frequency-reconfigurable single-feed multi-band antenna with bandwidth enhancement for wireless applications J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-11-21 Abdelheq Boukarkar, Satouh Rachdi, Mohamed Amine Merabet, Sami Baguigui, Khalil Adda Benziane
We propose a miniaturized frequency-reconfigurable multiband antenna with bandwidth enhancement. The main radiating patch is shorted from one edge to reduce the antenna footprint. An inverted U-sha...
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Estimation of dielectric response functions for NIR-SWIR absorbing dyes by inverse analysis of diffuse reflectance J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-10-27 R. Viger, S. Ramsey, T. Mayo, S. G. Lambrakos
This study describes the estimation of dielectric response functions for NIR-SWIR absorbing dyes by inverse analysis of diffuse reflectance. The inverse analysis procedure is based on the Kramers–K...
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An integrated spiral DGS and an open stub meander-line resonator in the 0.13-µm BiCMOS technology for a 18-GHz band oscillator J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-10-27 Marwa E. Mousa, Mohamed A. Yakout, Haythem H. Abdullah, M. El din Abo El-Soud
In this paper, an 18 GHz voltage-controlled oscillator (VCO) with improved phase noise (PN) and smaller size is proposed. The filter consists of an open stub resonator and an integrated spiral Defe...
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An efficient and low-profile metasurface-based polarization converter with linear and circular polarization efficiencies for X- and Ku-Band applications J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-10-27 Muhammed Fatih Corapsiz
In this study, a metasurface-based linear and circular polarization converter operating on the reflection mode is proposed for X- and Ku-band microwave applications. The proposed converter offers a...
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Designing cladding mode interference device – a host for sensors and all-fiber inline gain-flattening component and broad-band filter J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-10-27 Protik Roy, Partha Roy Chaudhuri
This article describes how to devise interference and self-imaging of core and cladding modes based devices using dissimilar core concatenated all-fibers. The core diameter mismatch in the structur...
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Miniaturized near-field-focused antenna array J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-10-27 Yinuo Li, Juan Chen, Jianxing Li
This paper presents a microstrip planar antenna array designed for near-field focusing operating at 10 GHz. It is a challenge to reach the phase and amplitude distribution of near-field-focused ant...
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Electromagnetic jet produced with loaded waveguide ended by an optimized multi-rectangular sections tip J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-10-27 Hishem Hyani, Bruno Sauviac, Gérard Granet, Bernard Bayard, Stéphane Robert, Kofi Edee
Previous works have demonstrated that a parallel plate waveguide, equipped at the end with a tip, can be used to initiate an “electromagnetic jet (Ej)” (this name generalizes the photonic jet (Pj) ...
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Miniaturized quad-band bandpass filter using quad-mode stepped impedance resonator J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-09-16 Shichao Jin, Kaijun Song, Xueyuan Ding
A miniaturized quad-band bandpass filter (BPF) using compact quad-mode stepped impedance resonator (IQMSIR) is proposed. Based on the symmetric presented by the resonator, four modes are deduced us...
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LMS and RLS beamforming algorithms based linear antenna array with known mutual coupling J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-09-15 Noureddine Boughaba, Ouarda Barkat
This study explores the application of LMS and RLS algorithms in adaptive beamforming for a linear array of half wavelength dipole (HWD) antennas with known mutual coupling. The research initiates ...
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Design of programmable beam splitting metasurface J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-09-15 Li Shaochen, Yan Teng, Yuhua Xiao, Chun Li, Borui Bian, Yue Juan, Ling Jiang
Metasurface has been applied as one critical platform for electromagnetic modulation devices. Here, a programmable metasurface loaded with positive-intrinsic negative (PIN) diodes is proposed to re...
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An efficient dual-scale method for analysis of EMI problems resulted from radiation sources J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-09-14 Dongmin Zhang, Cheng Liao, Xiaochuan Deng, Song Fu
An efficient dual-scale method, which integrates parabolic equation (PE) with electric field integral equation (EFIE) formulated via the Rao-Wilton-Glisson moment method (RWG-MOM), is proposed to a...
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Cascaded HfO2/SiO2 microstructure for symmetrical two-port beam dispersion J. Electromagn. Waves Appl. (IF 1.3) Pub Date : 2023-08-21 Hong Zou, Bo Wang
A new type of double-dielectric layer two-port beam splitter grating based on sandwich structure is proposed. This grating has the characteristic of zeroth order elimination. The structural paramet...