Microwave and Optical Technology Letters最新文献_第10页

A Wideband Circularly Polarized 2 × 2 Patch Antenna Array 宽带圆极化2 × 2贴片天线阵列

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2025-07-22 DOI: 10.1002/mop.70315

Chang-Feng Liang, Fang Yuan, Yun-Peng Lyu, Bao-Guang Liu

{"title":"A Wideband Circularly Polarized 2 × 2 Patch Antenna Array","authors":"Chang-Feng Liang, Fang Yuan, Yun-Peng Lyu, Bao-Guang Liu","doi":"10.1002/mop.70315","DOIUrl":"https://doi.org/10.1002/mop.70315","url":null,"abstract":"<div>\u0000 \u0000 <p>In this study, A wideband circularly polarized 2 × 2 patch antenna array with wideband broadside radiation characteristics is proposed. The proposed array consists of four circular patches rotating in sequence, and each patch is loaded with an inclined rectangular slot. The purpose of adopting capacitive coupling feed is to excite three resonant modes of circular patch at the same time. The wideband property benefits from the combination of three modes, namely TM<sub>2, 1</sub>, TM<sub>2.5, 1</sub>, and TM<sub>3, 1</sub>. The improvement of circularly polarized gain on the broadside is attributed to the compensation of slot mode, which has natural broadside radiation. The proposed 2 × 2 antenna array employs the layout of sequential rotation, meanwhile the phase conditions required for circularly polarized radiation are met by designing a one-to-four power division and phase-shifting feed network. To validate the array design concept, a prototype is fabricated and measured. The measured results indicate that the fractional bandwidth of VSWR < 2 is 66.7%, involving 5–10 GHz, while the relative bandwidth of AR < 3 dB is 53.1%, involving 5.17–8.91 GHz. Besides the realized RHCP gain is larger than 6 dBic in the band of 5.35–8.86 GHz, and the relative bandwidth is 49.4%. The peak gain is 11.5 dBic and the radiation efficiency is 72%–88% within gain bandwidth. The antenna profile is 0.125<i>λ</i><sub>0</sub> (<i>λ</i><sub>0</sub> is the wavelength in free space at center frequency).</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 7","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144681381","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 High Isolation Antenna Array With Loaded Dummy for In-Band Full-Duplex Application 带内全双工高隔离负载假人天线阵列

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2025-07-19 DOI: 10.1002/mop.70306

Lun Cui, Yu-Heng Wang, Shi-Gang Zhou, Chow-Yen-Desmond Sim

引用次数: 0

2-D Scanning-Angle Expansion of Phased Array Antenna Using Metalens 基于超透镜的相控阵天线二维扫描角扩展

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2025-07-17 DOI: 10.1002/mop.70301

Ze Yu, Chang Chen, Wei-dong Chen, Xiang Zhang, Xiao-lin Zhang

{"title":"2-D Scanning-Angle Expansion of Phased Array Antenna Using Metalens","authors":"Ze Yu, Chang Chen, Wei-dong Chen, Xiang Zhang, Xiao-lin Zhang","doi":"10.1002/mop.70301","DOIUrl":"https://doi.org/10.1002/mop.70301","url":null,"abstract":"<div>\u0000 \u0000 <p>A novel method is proposed in this letter, which utilizes a metalens to enhance the electrical scanning range of a two-dimensional (2-D) phased array antenna (PAA). This method offers the advantages of easy integration and minimal scanning loss. The design incorporates a metasurface (MS) element that can adjust the transmission phase of linearly polarized waves from 0° to 360°, with transmission amplitudes exceeding 0.8 at 10 GHz, that is, a transmission loss of less than 1.9 dB. Furthermore, the structure of the multi-layer metal patterns can enhance the stability of the MS element under oblique incidences of linear polarization, and the maximum phase difference of the transmitted waves is less than 34° at 10 GHz. The metalens is constructed based on the generalized Snell's law, enabling arbitrary adjustment of the electromagnetic wave direction by designing the phase gradient of the incident plane, which provides a theoretical basis for 2-D scanning beam expansion. Experimental validation of the scanning range expansion method is performed using a 4 × 4 PAA integrated with the 12 × 12-unit metalens at 10 GHz, and the period of the MS element is 0.33λ. Additionally, measured results indicate that the lens extends the electrical scanning range of the PAA in the E-plane (from ± 48° to ± 75°) and H-plane (from ± 42° to ± 71°), with a maximum realized gain of 14.9 dBi, scanning loss of less than 3.7 dB, and a side lobe level (SLL) better than − 5.2 dB.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 7","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144647220","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-Cost Ku-Band Planar Frequency-Phase Scanning Array Antenna for Low-Altitude Target Detection Applications 用于低空目标探测的低成本ku波段平面频相扫描阵列天线

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2025-07-16 DOI: 10.1002/mop.70304

Ze Yu, Hao Fan, Chang Chen, Wei dong Chen, Xiang Zhang, Xiao lin Zhang

{"title":"A Low-Cost Ku-Band Planar Frequency-Phase Scanning Array Antenna for Low-Altitude Target Detection Applications","authors":"Ze Yu, Hao Fan, Chang Chen, Wei dong Chen, Xiang Zhang, Xiao lin Zhang","doi":"10.1002/mop.70304","DOIUrl":"https://doi.org/10.1002/mop.70304","url":null,"abstract":"<div>\u0000 \u0000 <p>This letter proposes a hybrid scanning regime phased array antenna that combines frequency and phase scanning to achieve multi-target detection and tracking in the 360° azimuthal (AZ) direction through mechanical and phase scanning, as well as elevation (EL) target detection by frequency scanning. The microstrip slow-wave line serves as a feed to the radiating patch, enabling frequency scanning. The strip line is coupled with energy through slots of different sizes, exciting the patch antennas, which can effectively enhance the impedance bandwidth of the line array. The Genetic Algorithm (GA) is used to design a low side lobe level (SLL) frequency-scanning line array, and metallic through-vias are utilized to reduce mutual coupling between line arrays, ensuring good active standing-wave radio (AVSWR) performance after two-dimensional phased array formation. The proposed frequency-phase scanning array antenna was fabricated and tested. The array consists of 48 series-fed line arrays arranged in the azimuth direction, all integrated onto a single PCB board measuring approximately 175 × 432 × 1.016 mm<sup>3</sup> (9.7 × 24.2 × 0.06 λ<sup>3</sup>). This design offers advantages of low-profile, light-weight, and high-integration. And it can achieve ±45° phase scanning in the azimuth direction within a bandwidth of 15.7–17.7 GHz (12%), with SLL better than −26.1 dB. Additionally, it provides frequency scanning range greater than 21.4° and SLL better than −16.1 dB. The aperture efficiency ranges from 70% to 85%, and the maximum gain of the array reaches 35.9 dBi.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 7","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635442","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

Temperature Stability of Optical Fiber Transmission Spectrum at Small Bending Radius 小弯曲半径下光纤传输光谱的温度稳定性

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2025-07-16 DOI: 10.1002/mop.70288

Yuhao Ma, Ran Bi, Xilong Guo, Lei Wang, Kan Chen, Xiaowu Shu

引用次数: 0

A Broadband Circularly Polarized Antenna Using Transmissive Polarization Conversion Metasurface 一种基于透射极化转换超表面的宽带圆极化天线

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2025-07-14 DOI: 10.1002/mop.70296

Peng Wang, Hongwei Yuan, Xin Qu, Minquan Li, Yihong Qi, Zufeng Zhang, Yongkang Yuan, Fangcheng Huang

{"title":"A Broadband Circularly Polarized Antenna Using Transmissive Polarization Conversion Metasurface","authors":"Peng Wang, Hongwei Yuan, Xin Qu, Minquan Li, Yihong Qi, Zufeng Zhang, Yongkang Yuan, Fangcheng Huang","doi":"10.1002/mop.70296","DOIUrl":"https://doi.org/10.1002/mop.70296","url":null,"abstract":"<div>\u0000 \u0000 <p>With the rapid development of modern wireless communication technology, antennas, as a core component of the wireless communication system, have become a research focus. The axial ratio (AR) of an antenna is particularly critical to its overall performance. Increasing AR bandwidth can ensure circular polarization performance, enhance system compatibility, and improve anti-interference capabilities. This paper presents a design of a circularly polarized patch antenna based on metasurface technology. By incorporating a transmission-type polarization conversion metasurface, copper plates embedded vertically in the ground plane, and n-shaped parasitic patches, significant improvements in antenna performance are achieved. The tests show that the antenna achieves a 43.4% <i>S</i><sub>11</sub> bandwidth within the frequency range of 4.94–7.68 GHz, and a 31.4% 3 dB AR bandwidth within the range of 4.83–6.43 GHz, demonstrating excellent performance. This study provides new technical support and design ideas for the field of wireless communication.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 7","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144615529","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

Terahertz High-Power Sixteen-Way Power Combiner/Divider Using Combining Circular Waveguide Mode 结合圆波导模式的太赫兹大功率十六路功率合成器/分频器

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2025-07-10 DOI: 10.1002/mop.70277

Kaijun Song, Kezhou Pu, Qian Li, Hafiz Muhammad Talha Aslam, Yong Fan

引用次数: 0

High-Frequency Selectivity Coaxial Multiplexer Using Chain Structure 链式结构高频选择性同轴多路复用器

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2025-07-10 DOI: 10.1002/mop.70287

Kaijun Song, Min Liu, Parama Kumarage Aresha Madhubhani, Yong Fan

引用次数: 0

Analysis of C and S Trace Elements in Steel Using Orthogonal Preablation Dual-Pulse Laser Induced Breakdown Spectroscopy 正交预烧蚀双脉冲激光诱导击穿光谱法分析钢中C、S微量元素

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2025-07-09 DOI: 10.1002/mop.70299

Ming Liang, Yan Shao, Jinqi Dai, Jun Lu, Xun Gao

{"title":"Analysis of C and S Trace Elements in Steel Using Orthogonal Preablation Dual-Pulse Laser Induced Breakdown Spectroscopy","authors":"Ming Liang, Yan Shao, Jinqi Dai, Jun Lu, Xun Gao","doi":"10.1002/mop.70299","DOIUrl":"https://doi.org/10.1002/mop.70299","url":null,"abstract":"<div>\u0000 \u0000 <p>The contents of nonmetallic elements such as C, S and P have an important influence on the hardness and strength of steel, so the detection the contents of these nonmetallic elements is critical task for the steel quality evaluation. In this paper, the C, S trace elements in steel are analyzed by using orthogonal preablation dual-pulse Laser induced breakdown spectroscopy (OP-DP-LIBS), and the spectral enhancements of C II 513.328 nm and S I 386.76 nm are observed as compared to SP-LIBS. The spectral intensity of C II 513.328 nm and S I 386.76 nm are increased with inter-pulse delay time and get maximum at delay time of 10 and 20 μs respectively, then decrease with inter-pulse delay time. Based on quantitative analysis of several trace elements in six alloy steel standard samples, correlation coefficient (<i>R</i><sup>2</sup>) of C II 513.328 nm and S I 386.76 nm are all more than 0.9 and relative standard deviation (RSD) of two spectrum are all within 6%. The limit of detection (LOD) of C II 513.328 and S I 386.76 nm calculated are 209 and 7.32 ppm, respectively. It is demonstrated that detection precision and reliability can be enhanced by using OP-DP-LIBS, which means that nonmetal trace elements such as C and S in steel is become reality to detect within the range of 200–900 nm in air environment using OP-DP-LIBS technique.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 7","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144582234","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

Gain-Enhanced and Size Reduction Endfire Periodic Antenna Array With Multiple DSPSL-Based Loop Resonant Element 基于多dsp的环形谐振元件的增益增强和尺寸减小端射周期天线阵列

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2025-07-07 DOI: 10.1002/mop.70285

Zhe Wu, Yu Yun, NengWu Liu, Agostino Monorchio, Lingkun Ma, Tao Tao, Tao Wu, Ruiqi Wang, Ling Sun, Yindi Wang

{"title":"Gain-Enhanced and Size Reduction Endfire Periodic Antenna Array With Multiple DSPSL-Based Loop Resonant Element","authors":"Zhe Wu, Yu Yun, NengWu Liu, Agostino Monorchio, Lingkun Ma, Tao Tao, Tao Wu, Ruiqi Wang, Ling Sun, Yindi Wang","doi":"10.1002/mop.70285","DOIUrl":"https://doi.org/10.1002/mop.70285","url":null,"abstract":"<div>\u0000 \u0000 <p>A compact high-gain endfire loop antenna array based on a double-sided parallel stripline (DSPSL) structure is proposed in this letter. The proposed design achieves radiation mode transformation by deforming the DSPSL into two half-loops positioned on opposite sides of the substrate. A single feed port is employed, while the other port is terminated with a metal pin for impedance matching. By integrating a parasitic circular patch within the loop structure, the design effectively suppresses sidelobes and significantly enhances directionality. Furthermore, the endfire gain is further improved by incorporating a reflector behind the first radiating element. A prototype was fabricated and measured, demonstrating excellent agreement between simulated and experimental results. The measured peak gain reaches 13.57 dBi within the operating bandwidth, while maintaining a compact overall volume of only 0.19<span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 \u0000 <mrow>\u0000 <msubsup>\u0000 <mi>λ</mi>\u0000 \u0000 <mn>0</mn>\u0000 \u0000 <mn>3</mn>\u0000 </msubsup>\u0000 </mrow>\u0000 </mrow>\u0000 <annotation> ${lambda }_{0}^{3}$</annotation>\u0000 </semantics></math>.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 7","pages":""},"PeriodicalIF":1.0,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573375","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