发布求助
文献互助 智能选刊 最新文献

Microwave and Optical Technology Letters最新文献

筛选
英文 中文
A Narrowband Bandpass Filter With Wide Stopband Using Mixed Lumped and Distributed Circuits
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-03-05 DOI: 10.1002/mop.70158
Yao Chen, Jing Tian, Kai-Da Xu
{"title":"A Narrowband Bandpass Filter With Wide Stopband Using Mixed Lumped and Distributed Circuits","authors":"Yao Chen,&nbsp;Jing Tian,&nbsp;Kai-Da Xu","doi":"10.1002/mop.70158","DOIUrl":"https://doi.org/10.1002/mop.70158","url":null,"abstract":"<div>\u0000 \u0000 <p>A narrowband bandpass filter (BPF) using mixed lumped and distributed circuits is proposed with wide stopband and small circuit size. By loading four lumped capacitors on the two pairs of coupled lines and two open stubs, the periodic harmonics generated by the coupled lines and open stubs can be effectively suppressed, resulting in the achievement of wideband stopband. To validate the design, a narrowband BPF prototype with center frequency <i>f</i><sub>0</sub> at 1 GHz is fabricated, whose measured 3-dB fractional bandwidth is 5% (0.97–1.02 GHz). The in-band insertion loss is less than 1.5 dB and return loss is greater than 32 dB. The rejection level of stopband is better than −20 dB at the frequency range from 1.05 to 6.22 GHz.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143554479","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
Analysis and Design of Highly Selective Zero-Controlled Band-Pass Multilayer Frequency Selective Surface
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-03-04 DOI: 10.1002/mop.70154
Yan Zhang, Dazhi Ding, Tiancheng Zhang, Huaguang Bao, Juan Xu
{"title":"Analysis and Design of Highly Selective Zero-Controlled Band-Pass Multilayer Frequency Selective Surface","authors":"Yan Zhang,&nbsp;Dazhi Ding,&nbsp;Tiancheng Zhang,&nbsp;Huaguang Bao,&nbsp;Juan Xu","doi":"10.1002/mop.70154","DOIUrl":"https://doi.org/10.1002/mop.70154","url":null,"abstract":"<div>\u0000 \u0000 <p>In this paper, the idea of cross-coupling is applied to realize zero-controllable high-selectivity band-pass frequency selective surface(FSS). The element consists of two resonant layers at the top and bottom and a coupling layer in the middle. Cross-coupling is introduced into the structure, which makes it have electric coupling, magnetic coupling and direct path. Two transmission zeros(TZs) are generated on both sides of the passband, thus realizing the filtering characteristics of fast roll-off. The mechanism of TZs generation is studied by using an equivalent circuit odd-even mode analytical method. Due to its centrosymmetric structure, the FSS has good angular stability and polarization stability. FSS samples with operating frequency at 19.25 GHz, low stop band at 18.2 GHz, and high stop band at 20.8 GHz were fabricated and tested experimentally. The FSS maintains stable performance at an incidence Angle of 75°. The measurement results are in good agreement with the full-wave and circuit simulation results, verifying the design of FSS.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535834","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
Multiobjective Optimization Design of High-Directivity Microstrip Tight-Coupling Directional Coupler With Node-Segment-Type Structure
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-03-03 DOI: 10.1002/mop.70162
Gongda Hu, Yuan He, Gang Wang
{"title":"Multiobjective Optimization Design of High-Directivity Microstrip Tight-Coupling Directional Coupler With Node-Segment-Type Structure","authors":"Gongda Hu,&nbsp;Yuan He,&nbsp;Gang Wang","doi":"10.1002/mop.70162","DOIUrl":"https://doi.org/10.1002/mop.70162","url":null,"abstract":"<div>\u0000 \u0000 <p>In this paper, a novel technique for the design of microstrip tight-coupling directional coupler with node-segment-type structure (NSTS) is proposed. The NSTS is configured by connecting microstrip line segments among free nodes distributed on the print circuit board (PCB). L-shaped line segments characterized by constraint nodes and individual width are proposed for detailed geometry description of NSTS. The optimal NSTS can be acquired by implementing multiobjective optimization search for the optimal distribution of the nodes and the line widths. For demonstration, a 3-dB microstrip directional coupler working at 1.75 GHz is designed with NSTS in a compact size. The measurement indicates that high directivity over 36 dB and amplitude imbalance of &lt; ±1 dB in an operation bandwidth of 33% can be obtained.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533308","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 Differential Dielectric Resonator Antenna Using Balanced Microstrip-To-Slotline Power Divider
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-03-02 DOI: 10.1002/mop.70155
Ayse Sari, Bin Li, Feng Wei, Xi Bei Zhao
{"title":"Wideband Differential Dielectric Resonator Antenna Using Balanced Microstrip-To-Slotline Power Divider","authors":"Ayse Sari,&nbsp;Bin Li,&nbsp;Feng Wei,&nbsp;Xi Bei Zhao","doi":"10.1002/mop.70155","DOIUrl":"https://doi.org/10.1002/mop.70155","url":null,"abstract":"<div>\u0000 \u0000 <p>A wideband differentially fed rectangular dielectric resonator antenna (DRA) is investigated in this paper. The proposed DRA is based on a wideband balanced-to-balanced microstrip-to-slotline power divider (MSPD). The balanced MSPD is designed using the multi-mode resonance of a slotline which realizes a broad 10-dB differential impedance bandwidth of 87% (1.84–4.45 GHz). The rectangular DRA can be excited to operate in a wideband TE<sub>111</sub> mode. The DRA has a 10-dB differential impedance bandwidth of about 42.6% (2.48–3.74 GHz) and a broadside radiation pattern with a peak gain of 5.2 dBi. The proposed differential-to-differential feeding mechanism to excite DRA can perfectly match with wideband differential circuits.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143530351","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
Tunable THz Edge-Coupled Graphene Directional Couplers: A General Analysis Resulting From Graphene Properties
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-02-28 DOI: 10.1002/mop.70159
Victor Dmitriev, Melryan Moraes
{"title":"Tunable THz Edge-Coupled Graphene Directional Couplers: A General Analysis Resulting From Graphene Properties","authors":"Victor Dmitriev,&nbsp;Melryan Moraes","doi":"10.1002/mop.70159","DOIUrl":"https://doi.org/10.1002/mop.70159","url":null,"abstract":"<div>\u0000 \u0000 <p>A surface plasmon-polariton graphene waveguide directional couplers for THz region are discussed in this paper. The device has a very simple structure. The central part of it presents two side-coupled parallel graphene nanoribbons with a small gap between them. The graphene waveguides are deposited on a dielectric substrate. In one of the presented examples, the proposed 3 dB coupler has a 25% fractional bandwidth centered at 3.8 THz with isolation and return losses better than −17 dB. By changing the Fermi energy of graphene, the power division in a given frequency range can be dynamically controlled or, alternatively, a frequency band of the coupler with a fixed power division can be dislocated. The discussion is fulfilled in terms of the so-called frequency reference point corresponding to a 3-dB coupler. We determine also the limits of possible coupler parameters tuning in the frequency range from 2 to 8 THz. The suggested general analysis can be useful in the design of graphene couplers for high-density integrated THz circuit.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521827","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
An Ultra-Wideband GaN PA MMIC With High-Efficiency
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-02-27 DOI: 10.1002/mop.70151
Li Zhang, Xuefeng Zheng, Pengbo Du, Hanbin Qu, Shujun Cai
{"title":"An Ultra-Wideband GaN PA MMIC With High-Efficiency","authors":"Li Zhang,&nbsp;Xuefeng Zheng,&nbsp;Pengbo Du,&nbsp;Hanbin Qu,&nbsp;Shujun Cai","doi":"10.1002/mop.70151","DOIUrl":"https://doi.org/10.1002/mop.70151","url":null,"abstract":"<div>\u0000 \u0000 <p>In this work, a three-stage ultra-wideband and high-efficiency monolithic microwave integrated circuit (MMIC) power amplifier (PA) from 17 to 41 GHz has been designed and realized. The available bandwidth, efficiency, output power, and drain voltage of the transistor have been thoroughly considered during the PA design. Additionally, the gate peripheries of the driving stage ratio are set as 1:1.5 to prevent premature saturation of the driving stage. Pulse measurements show that the PA has a saturated output power greater than 1.2 W across 83% of the fractional bandwidth (FBW). The power gain is over 15 dB with less than 1 dB variation, and it reaches a peak output power and PAE of 32.5 dBm and 33%, respectively. This PA presents notable wideband performance and advantages in comparison with other PAs in previous works.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143497348","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
Tri-Band Wearable SIW Textile Antenna With Metasurface for Wireless Body Area Network
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-02-27 DOI: 10.1002/mop.70149
Guo-Ping Gao, Li-Jun Jin, Jin-Ming Bai, Ge Ma, Wen-Di Guo, Bin Hu
{"title":"Tri-Band Wearable SIW Textile Antenna With Metasurface for Wireless Body Area Network","authors":"Guo-Ping Gao,&nbsp;Li-Jun Jin,&nbsp;Jin-Ming Bai,&nbsp;Ge Ma,&nbsp;Wen-Di Guo,&nbsp;Bin Hu","doi":"10.1002/mop.70149","DOIUrl":"https://doi.org/10.1002/mop.70149","url":null,"abstract":"<div>\u0000 \u0000 <p>In this letter, a tri-band on-body/off-body wearable substrate integrated waveguide (SIW) textile antenna operating in the World Interoperability for Microwave Access (WiMAX) band (2.3–2.69 GHz; 3.3–3.8 GHz) and WLAN band (5.15–5.825 GHz) is proposed. The antenna uses a SIW resonant cavity, which allows multiple frequency points to be excited to achieve multi-frequency characteristics, and a layer of metasurface (MS) structure is added to adjust the resonant frequency points and impedance bandwidth. The final results show that the antenna performance is good, the measured results are consistent with the simulated results, the peak gain is 9.27 dBi, the antenna creates the omnidirectional and unidirectional radiation patterns very well, in addition, its wearable performance is good, in the human body and the free space measured data is basically the same, using the three-layer human body tissue model to calculate the antenna's Specific Absorption Rate (SAR) value, and the calculation result is lower than the upper limit of the United States and the European Union standards, These characteristics indicate that the antenna can be used in wearable systems.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513655","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
Dual-Polarized Dipole Antenna With Enhanced Beamwidth in Both E-Plane and H-Plane
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-02-27 DOI: 10.1002/mop.70157
Zhiyuan Chen, Haodong Zhang, Fan Yang, Xin Kang, De-Yi Xiong, Dong Yan
{"title":"Dual-Polarized Dipole Antenna With Enhanced Beamwidth in Both E-Plane and H-Plane","authors":"Zhiyuan Chen,&nbsp;Haodong Zhang,&nbsp;Fan Yang,&nbsp;Xin Kang,&nbsp;De-Yi Xiong,&nbsp;Dong Yan","doi":"10.1002/mop.70157","DOIUrl":"https://doi.org/10.1002/mop.70157","url":null,"abstract":"<div>\u0000 \u0000 <p>In this letter, a dual-polarized dipole antenna with wide beamwidth in both <i>E</i>-plane and <i>H</i>-plane is developed. Compared to the typical printed dipole antenna, the radiator arms of the developed dipole antenna are bent into arc shapes to broaden the beamwidth. Moreover, four short arc-shaped metallic patches, which act as directors, are introduced to the outside of each radiator arm to further broaden the beamwidth. Simulated results show that the developed antenna achieves an operational bandwidth (where the value of reflection coefficients is less than −10 dB) of ~14.7% (1.76–2.04 GHz). In addition, the half-power beamwidths in both the <i>E</i>-plane and <i>H</i>-plane of the developed antenna are significantly broadened throughout the operating frequency band compared to the reference printed dipole. Specially, the beamwidths enhanced from 58° to 135° in the <i>E</i>-plane and from 95° to 128° in the <i>H</i>-plane, which validated the effectiveness of the developed beamwidth enhancement method. A prototype is fabricated and measured and shows good agreement with the simulated results.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143497347","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
An Ultra-Wideband Planar Lightweight Antenna With Solar Cells
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-02-27 DOI: 10.1002/mop.70160
Wenxing An, Xinyu Xu, Yi Wu, Yu Luo
{"title":"An Ultra-Wideband Planar Lightweight Antenna With Solar Cells","authors":"Wenxing An,&nbsp;Xinyu Xu,&nbsp;Yi Wu,&nbsp;Yu Luo","doi":"10.1002/mop.70160","DOIUrl":"https://doi.org/10.1002/mop.70160","url":null,"abstract":"<div>\u0000 \u0000 <p>An ultra-wideband antenna with solar cells is presented for low-carbon wireless communication. Four solar cells are introduced for the radiation structure with a solar cell coverage of 80.9%. A foam substrate with a low permittivity is adopted for lightweight and wideband characteristics. Different resonant modes are stimulated for wideband performance based on the slot and patch structures. The measured results show that the working frequency band (|S11| &lt; −10 dB) is from 1.42 to 5.3 GHz with a relative bandwidth of 115%. Bidirectional radiation patterns are achieved across the passband with an average gain of 4.5 dBi. This ultra-wideband dual-function design has a lightweight and planar structure for easy installation. It can accommodate various wireless communication systems (2G, 3G, 4G, and 5G) with the capacity to power self-supply.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513654","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 Versatile Design Method Applied to Conformal Metasurface Array Antenna
IF 1 4区 工程技术
Microwave and Optical Technology Letters Pub Date : 2025-02-24 DOI: 10.1002/mop.70134
Dongyang Lu, Zehua Wang, Chi Zhang, Ying Yu
{"title":"A Versatile Design Method Applied to Conformal Metasurface Array Antenna","authors":"Dongyang Lu,&nbsp;Zehua Wang,&nbsp;Chi Zhang,&nbsp;Ying Yu","doi":"10.1002/mop.70134","DOIUrl":"https://doi.org/10.1002/mop.70134","url":null,"abstract":"<div>\u0000 \u0000 <p>Accurate phase distribution and excitation incident characteristics are key issues in the design of conformal metasurface array antenna (CMAA). In this paper, we employ the improved conformal phase compensation formula to calculate the accurate phase distribution at different bending degrees. Meanwhile, elements with stable incident characteristics are designed to minimize the phase-shift deviation caused by the increase in incident angle. Furthermore, the combination of 1Bit digital coding and superposition of aperture fields enables the CMAA to adapt to different bending degrees while realizing beam-forming. Based on the designed structure, a 10 GHz dual-beam in the direction of (<i>φ</i> = 90°, <i>θ</i> = ±45°) conformal reflect-array antenna (CRAA) is fabricated by printing 15 × 15 liquid metal elements on PDMS substrate. The measured peak gain is 17.9 dBi, and the antenna maintains favorable radiation characteristics in the range of bending degree between ± 25%.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481294","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信