Journal of Electromagnetic Waves and Applications最新文献

{"title":"An integrated spiral DGS and an open stub meander-line resonator in the 0.13-µm BiCMOS technology for a 18-GHz band oscillator","authors":"Marwa E. Mousa, Mohamed A. Yakout, Haythem H. Abdullah, M. El din Abo El-Soud","doi":"10.1080/09205071.2023.2260385","DOIUrl":"https://doi.org/10.1080/09205071.2023.2260385","url":null,"abstract":"AbstractIn 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 Defective Ground Structure (DGS) resonator. The proposed oscillator is designed in the 0.13-µm SiGe BiCMOS technology. The differential cross-coupled VCO uses a bandpass filter. In this work, the conventional large-size coil is replaced by a resonator based on our proposed open stub resonator and defected ground structure (DGS) where the filter is equivalent to the large coil and the associated capacitors. The use of the filter results in a great reduction of VCO size, low losses, and low power consumption, hence an enhancement in the quality factor. The integrated spiral DGS is etched on the third metal layer (M3) below an open stub meander line onthe top metal layer (TM2) of the 0.13-µm top metal two (TM2) BiCMOS technology. The proposed VCO has a small die area of 0.089 mm2 and has FoMA of 188.8 dB and a power consumption is 13.38 mw. The simulated carrier frequency and phase noise are 18-GHz and −123.59 dBc/Hz (−103.7 dBc/Hz) at 10-MHz (1 MHz) offset frequency, respectively, which results in a figure of merit of 177.37 dB.KEYWORDS: Silicon germanium bipolar complementary metal oxide semiconductor (SiGe BiCMOS) oscillator; defected ground structure (DGS) resonator; voltage-controlled-oscillator (VCO)phase-noise (PN) Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsMarwa E. MousaMarwa Ebrahim Mousa received her M.Sc degree from the Department of Electronics and Communications Engineering, Mansoura University, Egypt in 2019. And the B.Sc. degree in Electronics and Communications engineering from the Higher Institute of Engineering and Technology in New Damietta-Egypt by 2012. She worked as an assistant teacher at new Damietta Higher Institute of Engineering and Technology - Egypt. She is registered for a Ph.D. degree at Electronics and Communications Engineering, Mansoura University, Egypt in 2021.Mohamed A. YakoutDr. Mohamed Abdel-Alim Yakout was born in Cairo, Egypt. He currently works as an associate Professor in the Electronics and Electrical Communications Engineering Department, Faculty of Engineering, Mansoura University (MU), Mansoura, Egypt. He received his B.Sc. with honors and M.Sc. degrees from MU in 1986 and 1992, respectively. He received his Ph.D. degree from Mansoura University, Mansoura, Egypt in 1997. During the period of 1993-1996 he was a visiting scolar at Technical University of Nova Scotia (TUNS), Nova Scotia, Canada where part of his Ph.D. thesis has been done. He won the MU best Ph.D thesis award for the year 1997/1998. He worked as an assistan Professor in Electronics dept.,College of Technological Studies (CTS), PAAET, Kuwait since 2001. His research interests include VLSI, Current-mode Circuits, ANN, RF circuits and Nano-electronics.Haythem H. ","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135926299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Designing cladding mode interference device – a host for sensors and all-fiber inline gain-flattening component and broad-band filter","authors":"Protik Roy, Partha Roy Chaudhuri","doi":"10.1080/09205071.2023.2260367","DOIUrl":"https://doi.org/10.1080/09205071.2023.2260367","url":null,"abstract":"AbstractThis 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 structure excites the cladding modes with the core mode that leads to a progressive interference imaging between the cladding modes and the core mode yielding wavelength and refractive index dependent loss. Through a systematic study, we tune the device parameters to gauge temperature and concentration with sensitivity of 0.0713 dB/°C and 0.0372 dB/(% mL/mL) respectively as a high-performance fiber sensor. Next, optimizing the wavelength sensitive parameters of the host configuration, we investigate the transmission characteristics as gain-flattening filters (GFF) of Erbium-doped fiber amplifiers (EDFAs) with maximum gain variations of 0.91 and 0.97 dB, for two different EDFAs respectively over a wavelength band of 33 and 25 nm. Finally, we demonstrate a tunable and two-flattop band rejection filters with rejection band of 14, 26 and 46 nm, respectively.KEYWORDS: Core–cladding mode interferencefiber optic temperature and concentration measurementEDFA gain flatteningband rejection filter Disclosure statementNo potential conflict of interest was reported by the author(s).Data availabilityThe information applied in this research is ready from the authors at request.Additional informationNotes on contributorsProtik RoyProtik Roy received his BSc degree in Physics from the University of Calcutta, West Bengal, India, in 2016 and his MSc degree from the Indian Institute of Technology, Kanpur, Uttar Pradesh, India in 2018. In 2019, he joined the Department of Physics, Indian Institute of Technology, Kharagpur, West Bengal, India, as a Research Scholar where since then, he has been working in the broad area of optics and photonics for this PhD research. His main research interest is to develop cladding mode based devices and sensors.Partha Roy ChaudhuriPartha Roy Chaudhuri is a Professor of Physics at Indian Institute of Technology Kharagpur, working in the area of Fiber and Integrated Optics and Photonics. In 2000, he did his PhD from the Fiber Optics Group of Indian Institute of Technology Delhi. He then pursued postdoctoral research at the Kyoto Institute of Technology, Japan, as a Japanese Government Fellow where he was working on various optical waveguides and components. Later, during 2002–2004, he worked at the Institute for Communications Research, NUS, in experimental research with photonic crystal fibers and components. In 2004, he joined the Faculty of the Physics Department, IIT Kharagpur, India. His current research interests are in the area of microstructured optical fibers/photonic crystal waveguides and devices for passive and active/nonlinear applications and development of fiber optic sensors for the detection of weak electric and magnetic fields.","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"341 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136236687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Miniaturized quad-band bandpass filter using quad-mode stepped impedance resonator","authors":"Shichao Jin, Kaijun Song, Xueyuan Ding","doi":"10.1080/09205071.2023.2251956","DOIUrl":"https://doi.org/10.1080/09205071.2023.2251956","url":null,"abstract":"ABSTRACTA 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 using even-and odd-mode technique. Design formulas are also derived and they are used to guide the filter design. Multiple coupling circuit technique is employed to realize the four passbands. Independent design for four passbands are achieved due to the physical dimensions and additional cross slots. Upper stopband is performed by adding open loop SIR at I/O ports. Transmission zeros among each passbands are generated, resulting in high isolation and selectivity. A quad-band filter is designed, fabricated and measured. The operating central frequencies of the fabricated filter are at 2.54/3.36/5.24/6.6 GHz. The measured 3-dB fractional bandwidths of the four passbands are about 3.9/6.4/4/4.6% and the minimum insertion losses are about 2.3/0.89/3.2/2.3 dB. Measurements correlate well with the simulation results.KEYWORDS: Miniaturized bandpass filterquad-bandquad-mode stepped impedance resonatorcross couplingtransmission zero (TZ) Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported in part by the National Natural Science Foundation of China [Grant Number 62171097] and by the National Defense Basic Scientific Research program of China [Grant Number JCKYS2021DC07].Notes on contributorsShichao JinShichao Jin received the B.S. degree in physics from Lanzhou University, Lanzhou, China, in 2004, and the Ph.D. degree in physics from Tsinghua University, Beijing, China, in 2009. He was a senior RF&SatCom engineer from 2009 to 2017 and a professor from 2017 to 2020 with the Beijing Institute of satellite Information Engineering, Beijing, China. He is currently with State Key Laboratory of Space-Ground Integrated Information Technology. He has 13 years' experience in communication systems, microwave circuits, active phased array antenna. His current research interests include satellite communication systems, synthetic aperture radar, RF/analog and millimeter-wave integrated circuits and systems.Kaijun SongKaijun Song (M'09-SM'12) received the M.S. degree in radio physics and the Ph.D. degree in electromagnetic field and microwave technology from the University of Electronic Science and Technology of China (UESTC), Chengdu, China, in 2005 and 2007, respectively. Since 2007, he has been with the EHF Key Laboratory of Science, School of Electronic Engineering, UESTC, where he was a Full Professor. From 2007 to 2008, he was a Postdoctoral Research Fellow with the Montana Tech, University of Mon[1]tana, Butte, MT, USA, working on microwave/millimeter-wave circuits and microwave remote sensing technologies. From 2008 to 2010, he was a Research Fellow with the State Key Laboratory of Millimeter Waves of China, Department of Electronic Engineering, City University of Hong Kong, on m","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135308138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"LMS and RLS beamforming algorithms based linear antenna array with known mutual coupling","authors":"Noureddine Boughaba, Ouarda Barkat","doi":"10.1080/09205071.2023.2251979","DOIUrl":"https://doi.org/10.1080/09205071.2023.2251979","url":null,"abstract":"AbstractThis 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 by deriving analytical expressions for the covariance matrix of signal impinging on an HWD antenna array, accounting for mutual coupling effects. Leveraging these expressions, we calculate the weights for both LMS and RLS algorithms, enabling the evaluation of the overall far-field radiation patterns of the HWD antenna array. The results demonstrate that these algorithms effectively steer the main lobe of the radiation pattern towards the desired user while creating nulls in the direction of undesired users. Notably, simulations indicate that the proposed compensation method enhances the performance of beamforming algorithms, particularly when considering mutual coupling effects. Specifically, the LMS algorithm outperforms the RLS algorithm in reducing interference, resulting in lower side lobe levels (SLL) in the radiation pattern.KEYWORDS: Beamforming algorithmsdipole antenna arraysmutual couplingLMSRLS Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135438430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of programmable beam splitting metasurface","authors":"Shaochen Li, Teng Yan, Xiao Yuhua, Li Chun, Bian Borui, Juan Yue, Jiang Ling","doi":"10.1080/09205071.2023.2258866","DOIUrl":"https://doi.org/10.1080/09205071.2023.2258866","url":null,"abstract":"AbstractMetasurface 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 realize dynamic switching of arbitrary multi-beam. Furthermore, the multi-beam coding sequence is optimized by a genetic algorithm (GA) to achieve dual- to nine-beam with different scattering directions. As a proof of concept, a programmable metasurface prototype that operates around 8 GHz is designed and fabricated to be tested in far-field measurements. The beam splitter has been verified by theoretical analysis and numerical simulation to have a power efficiency of over 70%. In the measurement system, multi-beam splitting phenomena are obtained using DC control of the PIN diodes “on” and “off”, which is consistent with the simulation results. The proposed beam splitter can be designed with real-time multi-beam switching and intelligently provides coding sequences with multiple directive angles, thus providing potential benefits for next-generation antennas.KEYWORDS: Programmable metasurfaceintelligent optimizationbeam splitterdynamic control Disclosure statementNo potential conflict of interest was reported by the author(s).Data availabilityData underlying the results presented in this paper are available from the authors upon reasonable request.Additional informationFundingThis work was supported by National Natural Science Foundation of China [grant number: 12273012].Notes on contributorsShaochen LiLi Shaochen, College of Information Technology, Nanjing Forestry University, Nanjing, China.Teng YanTeng Yan, College of Information Technology, Nanjing Forestry University, Nanjing, China.Xiao YuhuaXiao Yuhua, College of Information Technology, Nanjing Forestry University, Nanjing, China.Li ChunLi Chun, College of Information Technology, Nanjing Forestry University, Nanjing, China.Bian BoruiBian Borui, College of Information Technology, Nanjing Forestry University, Nanjing, China.Juan YueJuan Yue, College of Information Technology, Nanjing Forestry University, Nanjing, China.Jiang LingJiang Ling* received the B.E. degree from Central China Normal University, Wuhan, China, in 2001, and the Ph.D. degree from Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China, in 2007. She is currently a Professor at the College of Information Technology, Nanjing Forestry University, Nanjing, China. Her research interests include Electromagnetic Metamaterials, artificial intelligence and machine learning algorithms and terahertz spectroscopy and imaging applications. e-mail: jiangling@njfu.edu.cn","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135438423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An efficient dual-scale method for analysis of EMI problems resulted from radiation sources","authors":"Dongmin Zhang, Cheng Liao, Xiaochuan Deng, Song Fu","doi":"10.1080/09205071.2023.2251984","DOIUrl":"https://doi.org/10.1080/09205071.2023.2251984","url":null,"abstract":"AbstractAn 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 analyze the electromagnetic interference (EMI) problems resulted from radiation sources. This method is implemented by decomposing the original intractable multi-scale problem domain into two sub-regions: (1) modeling of the complicated ambient electromagnetic fields by PE and (2) solution of the fields coupling to the exposed electronic devices by RWG-MOM. Frequency-sweep and Fourier synthesis techniques are applied to calculate the transient currents and voltages. The proposed method is able to fully model the disturbances of the electromagnetic fields by multi-path effects. Besides, it reduces the memory footprint and the CPU computing time effectively compared to the traditional full-wave electromagnetic methods. Numerical examples are presented, and the simulation results indicate that this method is well suitable for the EMI analysis of external radiation sources.KEYWORDS: Dual-scale methodelectromagnetic interference (EMI)parabolic equation (PE)moment method (MOM)large-scale environment Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsDongmin ZhangDongmin Zhang was born in Hunan Province, China, in 1990. He received a B.E. degree in Electronic Information Science and Technology and a Ph.D. degree in Electromagnetic Field and Microwave Technology from Southwest Jiaotong University, Chengdu, China, in 2015 and 2020, respectively. He is currently an engineer in Southwest China Institute of Electronic Technology. His research interests include computational electromagnetics, electromagnetic environmental evaluation, and radio wave propagation.Cheng LiaoCheng Liao was born in Chongqing, China, in 1964. He received the B.S. and M.S. degrees in optics and the Ph.D. degree in Electromagnetic Field and Microwave Technology from Chengdu University of Electronic Science and Technology, Chengdu, China, in 1986, 1989, and 1995, respectively. From 1997 to 1998, he was a Visiting Scholar at the City University of Hong Kong, Kowloon Tong. He is currently a Professor and the Director of the Institute of Electromagnetic Field and Microwave Technology, Southwest Jiaotong University. His major research interests include antenna theory and design, computational electromagnetic, and electromagnetic compatibility.Xiaochuan DengXiaochuan Deng was born in Sichuan Province, China, in 1990. He received the B.E. degree in Electromagnetic Wave Propagation and Antenna from Chengdu University of Electronic Science and Technology, Chengdu, China, in 2014 and the Ph. D. degree in Electromagnetic Field and Microwave Technology from Southwest Jiaotong University, Chengdu, China, in 2020. He is currently an engineer in Southwest China Institute of Electronic Technology. His research interests inclu","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134970553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cascaded HfO2/SiO2 microstructure for symmetrical two-port beam dispersion","authors":"Hong Zou, Bo Wang","doi":"10.1080/09205071.2023.2248983","DOIUrl":"https://doi.org/10.1080/09205071.2023.2248983","url":null,"abstract":"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 parameters of the grating are optimized by the rigorous coupled-wave analysis (RCWA) and simulated annealing algorithm (SAA) to achieve the best performance of the grating. For both TE and TM polarizations, the diffraction efficiencies of ±1st orders can reach 49.34% and 49.15%, respectively. Meanwhile, the efficiency of the zeroth order is about only 0.5% for both polarizations. This novel microstructure has the significant characteristic of zeroth order elimination. Moreover, this grating has a wide incident bandwidth and excellent manufacturing tolerance. The simplified modal method (SMM) is also used to study the specific process of energy coupling in the grating.","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"68 1","pages":"1435 - 1448"},"PeriodicalIF":1.3,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89604606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flexible printed electrically small microwave resonator for automated displacement tracking","authors":"A. Banerjee, Farheen Fatima, N. Tiwari, M. Akhtar","doi":"10.1080/09205071.2023.2243255","DOIUrl":"https://doi.org/10.1080/09205071.2023.2243255","url":null,"abstract":"In this paper, a planar split ring resonator-based flexible RF sensor is developed for linear and rotational position tracking of a target object. The proposed sensing scheme employs a 100 μm thin flexible printed resonator that facilitates ease of adherence to a target object than that of the conventional RF sensor. The realized printed resonator is excited by a near-field proximity coupling mechanism using a standard 50 Ω microstrip line. A detailed numerical analysis for the linear and rotational displacement of several dummy targets is carried out by recording the change in measured parameters corresponding to the relative change in position of the printed resonator attached to a dummy target under test. Afterward, the equivalent circuit and fabricated prototype of a printed flexible sensor is developed and tested for the linear and rotational displacement of several target materials under observation and an ANN model is developed to curb the uncertainty.","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"30 1","pages":"1409 - 1424"},"PeriodicalIF":1.3,"publicationDate":"2023-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77815653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of balanced band pass filters with one transmission zero using an asynchronously coupled dual-mode resonator","authors":"Miguel-Antonio Romero-Ramirez, T. Kataria, J. Olvera-Cervantes, A. Corona‐Chavez","doi":"10.1080/09205071.2023.2240315","DOIUrl":"https://doi.org/10.1080/09205071.2023.2240315","url":null,"abstract":"A novel quasi-elliptic balanced bandpass filter (BBPF) designed on microstrip technology that uses Asynchronously Coupled Dual-Mode Resonator (ACDMR) is proposed. The filter is based on a novel Balanced Asynchronous Box (Basybox), which has five couplings and three resonators (two λ/2 resonators and a dual-mode grounded λ/2 resonator). By changing a conventional triplet with the use of dual-mode resonators, we can generate a non-resonant mode that generates a transmission zero (TZ). In addition, the filter has a balanced response. In this paper, full design methodology is presented along with a practical implementation. The filter has a center frequency in differential-mode of 950 MHz, a bandwidth of 53 MHz and a transmission zero at 975 MHz. For the common-mode, there is a rejection higher than 15 dB throughout the band up to 3 GHz. Good agreement between simulation and measurement is observed.","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"326 1","pages":"1341 - 1349"},"PeriodicalIF":1.3,"publicationDate":"2023-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74974428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A single layer and very close band spacing frequency selective surface with enhanced isolation","authors":"Yu-Xu Chen, Guobin Wan, Xin Ma, Bin Fu, Xinhui Jiao, Nan Wang","doi":"10.1080/09205071.2023.2243256","DOIUrl":"https://doi.org/10.1080/09205071.2023.2243256","url":null,"abstract":"An ultrathin and very closely located dual-band frequency selective surface (FSS) with enhanced isolation is proposed in this letter. The unit cell consists of two typical concentric hexagon rings, with several stubs loaded on each side of the inner ring. Through the stub-loaded configuration, the mutual coupling of adjacent resonators is highly decoupled and a very close band spacing FSS with better isolation can be achieved, and the ratio of the two operating bands can be as low as 1.06. Additionally, due to the independent resonant frequencies, the band ratio can be set over a wide range, from 1.06–2.43. Furthermore, the corresponding equivalent circuit model (ECM) is developed and analyzed for better comprehension of the underlying mechanisms of the proposed FSS. The validity of the design is then checked with a prototype, and the measured results show good agreement with the simulated ones.","PeriodicalId":15650,"journal":{"name":"Journal of Electromagnetic Waves and Applications","volume":"37 1","pages":"1425 - 1434"},"PeriodicalIF":1.3,"publicationDate":"2023-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81485153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}