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A Coplanar Non-Uniform Metasurface Antenna With Low-Profile and Wideband for Wearable Applications
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-03-24 DOI: 10.1002/mop.70170
Guo-Ping Gao, Li-Jun Jin, Jin-Ming Bai, Wen-Di Guo, Ben-Kai Zhang, Bin Hu
{"title":"A Coplanar Non-Uniform Metasurface Antenna With Low-Profile and Wideband for Wearable Applications","authors":"Guo-Ping Gao,&nbsp;Li-Jun Jin,&nbsp;Jin-Ming Bai,&nbsp;Wen-Di Guo,&nbsp;Ben-Kai Zhang,&nbsp;Bin Hu","doi":"10.1002/mop.70170","DOIUrl":"https://doi.org/10.1002/mop.70170","url":null,"abstract":"<div>\u0000 \u0000 <p>A single-layer broadband wearable non-uniform metasurface antenna is proposed in this letter. To better guide the design ideas, characteristic mode analysis (CMA) is used to investigate the intrinsic modal behaviors of the metasurface. By lengthening the center patch of the uniform metasurface, two modes of directional radiation appear and pull them together to expand the bandwidth. Cross slots are etched at four corner units to further reduce the footprint. The proposed antenna adopts a flexible structure and has better wearable comfort. The test performance in different parts of the human body is good, and the specific absorption rate is within the safety standard of the United States and the European Union, so it has a good prospect of wearable application.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689283","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}
引用次数: 0
Quadri-Polarized Continuous Scanning Leaky Wave Antenna Based on Spoof Surface Plasmon Polaritons—Half Mode Substrate Integrated Waveguide
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-03-24 DOI: 10.1002/mop.70180
Aozhan Ku, Dujuan Wei, Youlin Geng, Pengquan Zhang, Zongnan Liu
{"title":"Quadri-Polarized Continuous Scanning Leaky Wave Antenna Based on Spoof Surface Plasmon Polaritons—Half Mode Substrate Integrated Waveguide","authors":"Aozhan Ku,&nbsp;Dujuan Wei,&nbsp;Youlin Geng,&nbsp;Pengquan Zhang,&nbsp;Zongnan Liu","doi":"10.1002/mop.70180","DOIUrl":"https://doi.org/10.1002/mop.70180","url":null,"abstract":"<div>\u0000 \u0000 <p>In this study, we propose a novel leaky wave antenna (LWA) based on half mode substrate integrated waveguide (HMSIW) technology etched on spoof surface plasmon polaritons (SSPPs) structure, which is able to switch the polarization property over four states with continuous scanning performance in the upper half space. The antenna is structured into two layers: the lower layer consists of two side-to-side HMSIWs, while the upper layer is composed of two sets of radiating elements. By changing the excitation ports, multiple polarization states—horizontal linear polarization (HLP), vertical linear polarization (VLP), right-hand circular polarization (RHCP), and left-hand circular polarization (LHCP)—are switchable in the same frequency range from the backward region to the forward region. To ensure continuous scanning property, the intrinsic open-stopband (OSB) problem for HLP and VLP of LWA is solved by a set of metal vias in the lower layer and extra narrow metal-stubs in the upper layer, respectively. The proposed antenna integrates multiple polarization in one set of frequency-scanning antenna to satisfy the requirements of multi-scenario application in the modern wireless communication system. The proposed antenna is manufactured and measured. Measured results reveal that the beams can scan from backward to forward under four polarizations, which verifies the correctness of design theory and simulation result.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689448","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}
引用次数: 0
Optimal Design of Wideband Filtering Power Divider With Simple Structure and Low Design Difficulty
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-03-23 DOI: 10.1002/mop.70176
In-Seon Kim, Cheolsoo Lee, Joorae Park, Beomjun Park
{"title":"Optimal Design of Wideband Filtering Power Divider With Simple Structure and Low Design Difficulty","authors":"In-Seon Kim,&nbsp;Cheolsoo Lee,&nbsp;Joorae Park,&nbsp;Beomjun Park","doi":"10.1002/mop.70176","DOIUrl":"https://doi.org/10.1002/mop.70176","url":null,"abstract":"<div>\u0000 \u0000 <p>This work presents a novel filtering power divider with enhanced second harmonic suppression, wide bandwidth, and good frequency selectivity compared to conventional power dividers. This filtering power divider consisted of three parts, namely a bandpass filter, a power divider, and an impedance transformer. The analysis method suitable for this type of structure was presented. In addition, generalized design formulas were derived to produce optimal design parameter values and achieve the desired bandwidths. A wideband filtering power divider was thus fabricated for performance verification and used to obtain measurements; the results showed 50% fractional bandwidth, 0.47 dB insertion loss, and 15.2 dB return loss in the passband. Harmonic suppression and isolation at 2f<sub>0</sub> were measured to be 52 dBc and –35 dB, respectively.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689474","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}
引用次数: 0
A Low-Profile Unidirectional Antenna That Uses Folded Dipole With High Input Impedance as the Radiator
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-03-20 DOI: 10.1002/mop.70172
Yan Liu, He Huang, Lei Shi, Xiaoping Li
{"title":"A Low-Profile Unidirectional Antenna That Uses Folded Dipole With High Input Impedance as the Radiator","authors":"Yan Liu,&nbsp;He Huang,&nbsp;Lei Shi,&nbsp;Xiaoping Li","doi":"10.1002/mop.70172","DOIUrl":"https://doi.org/10.1002/mop.70172","url":null,"abstract":"<div>\u0000 \u0000 <p>By studying the impedance characteristics of the horizontal half-wave dipole near the metal reflector, we find that the antenna input impedance decreases when the distance between the dipole and the reflector is reduced. Therefore, a folded dipole with high input impedance is considered to replace the half-wave dipole to reduce the antenna profile. The folded dipole developed here occupies two connected dipoles with different widths, which is conducive to obtaining a higher input resistance, in other words, to obtaining a lower profile. In the rectangular area enclosed by the folded dipole, a coupling branch is added to extend the bandwidth. The antenna can cover the 2.3–2.62 GHz band, and provide stable directional radiation. Its size is only 0.35 × 0.2 × 0.08λ<sup>3</sup> (<i>λ</i> is the free space wavelength corresponding to the center frequency of the dipole operating band). We made a prototype of the antenna and tested it. Both the measured and simulated results verify the effectiveness of the method of using such a dipole with high input impedance to reduce the antenna profile. The proposed antenna can be used in base station system.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688936","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}
引用次数: 0
A Power Amplifier With Harmonic Precontrol
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-03-20 DOI: 10.1002/mop.70148
Rongjun Liu, Kaijun Song, Guannan Li, Xinyi Yang, Yong Fan
{"title":"A Power Amplifier With Harmonic Precontrol","authors":"Rongjun Liu,&nbsp;Kaijun Song,&nbsp;Guannan Li,&nbsp;Xinyi Yang,&nbsp;Yong Fan","doi":"10.1002/mop.70148","DOIUrl":"https://doi.org/10.1002/mop.70148","url":null,"abstract":"<div>\u0000 \u0000 <p>In this paper, a method of harmonic predistortion network is proposed, and the concept of dynamic harmonic control is proposed, that is, in the design of power amplifiers, by integrating part of the harmonic control circuit into the package, adjusting and realizing harmonic pre-control, and using the phase shift of the parasitic network of the package, the second and third harmonic load impedances can be effectively controlled to achieve dynamic matching of harmonics of different frequencies, and the output topology of the inverse Class F power amplifier (PA) at 2.45 GHz frequency is realized by this method. To verify the proposed method and concept, an inverse class F PA was designed, and an inverse class F PA was fabricated using die GaN HEMT. The simulation results achieved the expected waveform shaping and drain impedance, and the measurements showed that the fabricated inverse Class F PA could deliver 47.8 dBm saturation output power and 76% drain efficiency for a wide range of communication systems.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688906","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}
引用次数: 0
Generalized Quadrature Rules for the Discretization of 1D Radiating Panels
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-03-18 DOI: 10.1002/mop.70174
Amedeo Capozzoli, Claudio Curcio, Francesco D'Agostino, Angelo Liseno, Luigi Pascarella
{"title":"Generalized Quadrature Rules for the Discretization of 1D Radiating Panels","authors":"Amedeo Capozzoli,&nbsp;Claudio Curcio,&nbsp;Francesco D'Agostino,&nbsp;Angelo Liseno,&nbsp;Luigi Pascarella","doi":"10.1002/mop.70174","DOIUrl":"https://doi.org/10.1002/mop.70174","url":null,"abstract":"<p>We address the problem of discretizing a 1D radiating panel by a nonuniform array, determining the element positions and their excitations. The positioning of the array elements is performed by exploiting an optimized quadrature rule of the radiation integral. The excitation coefficients needed to radiate the field of interest are determined by an approach based on the Singular Value Decomposition (SVD) of the discrete radiation operator. Numerical results show the effectiveness of the technique.</p>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mop.70174","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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 Illusion Device Based on Diffraction Neural Network
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-03-18 DOI: 10.1002/mop.70167
Xinrui Liu, Li Deng, Lijie Chen, Gengjiang Yao
{"title":"Electromagnetic Illusion Device Based on Diffraction Neural Network","authors":"Xinrui Liu,&nbsp;Li Deng,&nbsp;Lijie Chen,&nbsp;Gengjiang Yao","doi":"10.1002/mop.70167","DOIUrl":"https://doi.org/10.1002/mop.70167","url":null,"abstract":"<div>\u0000 \u0000 <p>In recent years, electromagnetic illusion technology has used metasurface technology to accurately manipulate radar wavefront, which enhances the controllability and adaptability of electromagnetic engineering. However, traditional metasurface-based electromagnetic illusion technology faces the problem of difficulty in achieving far-field measurement conditions, and phase acquisition in near-field measurement is difficult. Therefore, this paper proposes an electromagnetic camouflage device based on a diffraction neural network (DNN). The device can perform phase-free near-field testing to determine the radar cross-section (RCS) of the target. Using this device, we can use metasurface technology to reconstruct RCS. The mean square error (MSE) between the reconstructed RCS and the target RCS is below 0.02, which has great potential in military applications.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645691","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}
引用次数: 0
Wideband Nonuniform Tapered Antipodal Vivaldi Antenna With Improved Radiation Pattern
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-03-18 DOI: 10.1002/mop.70173
Ashkan Golmohammadi, Farrokh Hojjat Kashani, S. H. Sedighy, Homayoon Oraizi, M. A. Chaychi Zadeh
{"title":"Wideband Nonuniform Tapered Antipodal Vivaldi Antenna With Improved Radiation Pattern","authors":"Ashkan Golmohammadi,&nbsp;Farrokh Hojjat Kashani,&nbsp;S. H. Sedighy,&nbsp;Homayoon Oraizi,&nbsp;M. A. Chaychi Zadeh","doi":"10.1002/mop.70173","DOIUrl":"https://doi.org/10.1002/mop.70173","url":null,"abstract":"<div>\u0000 \u0000 <p>In this paper, a novel antipodal Vivaldi antenna (AVA) is designed and fabricated using nonuniform taper inner and outer flares. The inner and outer flares Fourier series coefficients are optimized with particle swarm optimization (PSO) algorithm to reduce side lobe level (SLL) on both <i>E-</i> and H-planes. The lower frequency of the proposed AVA is reduced from 9.78 to 5.22 GHz compared with the conventional one. The proposed low-profile antenna has significantly lower SLL versus frequency on both <i>E-</i> and <i>H</i>-planes, and high gain rather than the conventional one. These valuable specifications prove the high performance of the proposed AVA compared with the conventional AVAs.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645692","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}
引用次数: 0
A Patch Filtenna With High Out-of-Band Suppression Levels 具有高带外抑制水平的贴片滤波器天线
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-03-17 DOI: 10.1002/mop.70175
Hai Song Huang, Duo-Long Wu, Zhen Hua Rong, Liang Hua Ye, Fan Jiang
{"title":"A Patch Filtenna With High Out-of-Band Suppression Levels","authors":"Hai Song Huang,&nbsp;Duo-Long Wu,&nbsp;Zhen Hua Rong,&nbsp;Liang Hua Ye,&nbsp;Fan Jiang","doi":"10.1002/mop.70175","DOIUrl":"https://doi.org/10.1002/mop.70175","url":null,"abstract":"<div>\u0000 \u0000 <p>A patch filtenna with high out-of-band suppression levels is presented in this letter. The proposed antenna is configured with a parasitic patch and a driven patch fed by a rectangular strip connected to a vertical coaxial probe. Etching four rectangular slots on the rhombus-shaped driven patch can introduce a high-frequency radiation null. One open rectangular ring connected to the rectangular feeding strip will produce a low-frequency radiation null and introduce a resonance mode, making the operating bandwidth wider. Meanwhile, the parasitic patch is placed above the driven patch further to improve the impedance bandwidth and the high-frequency filtering performance. The designed filtenna is 0.62<i>λ</i><sub>0</sub> × 0.62 <i>λ</i><sub>0</sub> × 0.13 <i>λ</i><sub>0</sub>, where <i>λ</i><sub>0</sub> is the free space wavelength at the center frequency. The measured prototype demonstrates that the proposed antenna has a flat gain of 7.9 ± 0.4 dBi over the −10-dB fractional bandwidth of 12.4% from 2.05 to 2.32 GHz, as well as a high suppression level of 26.1 and 20.6 dB at low- and high-frequency out-band. These advantages make the antenna suitable for 5G n34 band communication systems.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632651","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}
引用次数: 0
A Meander Line Integrated Rectangular Tri-Band Antenna for 5G Sub-6GHz Applications 用于 5G 6GHz 以下应用的蜿蜒线集成矩形三频天线
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-03-16 DOI: 10.1002/mop.70164
Zhou Jia-feng, Li Jiu-sheng
{"title":"A Meander Line Integrated Rectangular Tri-Band Antenna for 5G Sub-6GHz Applications","authors":"Zhou Jia-feng,&nbsp;Li Jiu-sheng","doi":"10.1002/mop.70164","DOIUrl":"https://doi.org/10.1002/mop.70164","url":null,"abstract":"<div>\u0000 \u0000 <p>A meander line integrated rectangular tri-band microstrip antenna is proposed for 5G communication applications. The antenna is made of FR-4 material as the dielectric medium, and the optimized antenna dimensions are 0.22λ<sub>L</sub> × 0.29λ<sub>L</sub> × 0.012λ<sub>L</sub>. The antenna operates at cental frequencies of 2.31, 3.75, and 5.52 GHz, with peak gains of 3.17, 2.22, and 2.69dBi, respectively. The −10 dB bandwidths are of 80 MHz (2.27–2.35 GHz), 810 MHz (3.39–4.20 GHz), and 580 Hz (5.17–5.75 GHz), with relative bandwidths of 3.5%, 21.3%, and 10.6%, respectively. The measured results are in good agreement with the simulated ones, which verifies the effectiveness of the antenna design. The far-field radiation are stable, guaranteeing good performance in the tri-band range.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632780","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}
引用次数: 0
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