Microwave and Optical Technology Letters最新文献_第2页

A Wideband High Gain Transmit-Array Antenna Exploiting Polarization-Rotated Metasurface Cell 利用偏振旋转超表面单元的宽带高增益发射阵列天线

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2024-12-11 DOI: 10.1002/mop.70049

Yamei Zhang, Feng Xu, Jingxia Qiang, Shui Liu, Qi Xie

{"title":"A Wideband High Gain Transmit-Array Antenna Exploiting Polarization-Rotated Metasurface Cell","authors":"Yamei Zhang, Feng Xu, Jingxia Qiang, Shui Liu, Qi Xie","doi":"10.1002/mop.70049","DOIUrl":"https://doi.org/10.1002/mop.70049","url":null,"abstract":"<div>\u0000 \u0000 <p>A novel polarization-insensitive transmit-array (TA) antenna using linear polarization-rotated (PR) metasurface (MS) unit cells has been proposed in this article. Firstly, we design a wideband polarization-insensitive polarization-rotated MS unit cell. The MS cell can provide high transmission for incident linear polarized waves with polarization rotation by 90°. Then, we investigate the stability of the MS cell under the oblique incident wave. The proposed MS cell keeps a stable response under oblique incident wave over ± 30°. To verify the excellent performance of the proposed MS. We design a high-gain TA antenna consisting of a standard feed horn and an aperture with a gradient phase. The gradient phase compensation is provided by varying the geometric dimension of the proposed MS. The obtained TA antenna works in a wide band with high gain. We fabricated the aperture and set up a prototype of TA antenna to verify our work. We measure the TA antenna and the results show a wide operating band from 14.2 to 18 GHz with a pick gain of 23.9 dBi. The favorable performance of the TA antenna is a good candidate in satellite systems and long-distance satellite system. Furthermore, the angular stability of the MS cell is also verified by realizing the beam scanning performance. An over ± 30° scan range is obtained. Good beam scanning can be used in radar detection and expand signal coverage.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"66 12","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860819","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 Rollar-Type Resonant Photoacoustic Spectroscopy for Trace Gas Detection 用于痕量气体检测的滚筒式共振光声光谱

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2024-12-11 DOI: 10.1002/mop.70060

Yongjia Zhang, Guojie Wu, Zhenfeng Gong, Liang Mei

{"title":"A Rollar-Type Resonant Photoacoustic Spectroscopy for Trace Gas Detection","authors":"Yongjia Zhang, Guojie Wu, Zhenfeng Gong, Liang Mei","doi":"10.1002/mop.70060","DOIUrl":"https://doi.org/10.1002/mop.70060","url":null,"abstract":"<div>\u0000 \u0000 <p>This paper presents a miniature Rollar-type resonant photoacoustic cell (RRPAC), consisting of two cylindrical resonant cavities and a buffer chamber. The finite element analysis of the acoustic field distributions for the RRPAC and T-type resonant photoacoustic cell (TRPAC) is utilized, demonstrating that RRPAC can produce a greater photoacoustic signal than the conventional TRPAC. A high sensitivity trace C<sub>2</sub>H<sub>2</sub> photoacoustic spectroscopy (PAS) system is successfully developed by combining a cantilever beam-based acoustic sensor as the acoustic sensing unit and a high-speed spectrometer as the demodulation unit with the RRPAC. The experimental results indicate that the 2f signal of the RRPAC at the first-order resonance mode is approximately 1.5 times of the TRPAC with the same C<sub>2</sub>H<sub>2</sub> concentration. The gas detection limit of the RRPAC PAS system for C<sub>2</sub>H<sub>2</sub> is 40.7 ppb at an averaging time of 100 s. In comparison with the conventional TRPAC, the RRPAC exhibits higher sensitivity, thus providing a novel solution for the advancement of the PAS system.</p></div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"66 12","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860818","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

Scaled Coherence Factor Based Delay Multiply and Sum Beamforming Algorithm in Microwave Imaging 微波成像中基于比例相干因子的延迟乘和波束形成算法

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2024-12-09 DOI: 10.1002/mop.70053

Si-si Hao, Jian-ying Li, Xin-zhao Chen, Xiang-long Li

引用次数: 0

A Novel Metasurface Antenna With Enhanced CP Bandwidth Through Decreasing Q Factor 一种通过减小Q因子提高CP带宽的新型超表面天线

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2024-12-08 DOI: 10.1002/mop.70050

Yunlong Mao, Minghui Zhu, Haonan Liu, Si Li, Shunqi Zhang

引用次数: 0

A Novel Balanced-to-Balanced Filtering Crossover With Wideband Isolation and Common-Mode Suppression 一种具有宽带隔离和共模抑制的新型平衡-平衡滤波交叉器

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2024-12-08 DOI: 10.1002/mop.70044

Xiao Tan, Zhongbao Wang, Shipeng Zhao, Hongmei Liu, Mingming Gao, Shaojun Fang

引用次数: 0

Design of a Novel 16-Way Short Pulse Power Divider Based on Transmission Line Transformer 一种基于输电线路变压器的新型16路短脉冲分压器的设计

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2024-12-08 DOI: 10.1002/mop.70054

Yiping Shi, Guangming Wang, Xingjia Zhang, Chaolong Yi, Lei Shi, Yufeng Zhu, Yanlei Lu, Xiangyu Wang, Zhaofei Lei

{"title":"Design of a Novel 16-Way Short Pulse Power Divider Based on Transmission Line Transformer","authors":"Yiping Shi, Guangming Wang, Xingjia Zhang, Chaolong Yi, Lei Shi, Yufeng Zhu, Yanlei Lu, Xiangyu Wang, Zhaofei Lei","doi":"10.1002/mop.70054","DOIUrl":"https://doi.org/10.1002/mop.70054","url":null,"abstract":"<div>\u0000 \u0000 <p>This article presents a 16-way short pulse power divider (PD) with the same input and output impedance based on the transmission line transformer (TLT) principle. Different from the traditional multi-channel PD composed of impedance tapered transmission lines and PDs in parallel structure, the novel 16-way PD is cascaded by multi-stages of series-parallel structure, which avoids the process of impedance transformer and improves the compactness of the device, as well as the transmission efficiency. It was composed of four stages of the novel series-parallel constructure converted from coaxial waveguide to microstrip line. And to control the energy dissipation, a unified ground of the output ports was built, and the short-ended metal shell was loaded between every stage. This 16-way PD was fabricated and measured. The measured return loss of the PD is less than −16 dB from 440 MHz to 6 GHz, and less than −10 dB from 270 MHz to 6 GHz. The measured peak gain is more than 0.83 when input by a Gaussian pulse with t<sub>FWHM</sub> = 250 ps (FWHM: full-width half maximum).</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"66 12","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860286","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

Performance Analysis of Radio Frequency/Underwater Wireless Optical Communication System With Fog Conditions Based on NOMA 基于NOMA的雾条件下射频/水下无线光通信系统性能分析

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2024-12-08 DOI: 10.1002/mop.70040

Qian Pei, Yanjun Zhang, Wei Lian, Weiyan Liu, Shize Wang

引用次数: 0

Ionospheric clutter reduction for high-frequency surface-wave radar based on time-frequency-ridgelet filtering 基于时频小岭滤波的高频面波雷达电离层杂波消减技术

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2024-12-08 DOI: 10.1002/mop.34348

Yuan Su, Yinsheng Wei, Rongqing Xu, Yongtan Liu

引用次数: 0

Synthesis of Four-Coupled-Line Based Wideband Coupler With Inherent Filtering Feature and Its Modification 带固有滤波特性的四耦合线宽带耦合器的合成及其改进

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2024-12-04 DOI: 10.1002/mop.70051

Yan Zhang, Hongmei Liu, Siran Zhang, Zhongbao Wang, Shaojun Fang

{"title":"Synthesis of Four-Coupled-Line Based Wideband Coupler With Inherent Filtering Feature and Its Modification","authors":"Yan Zhang, Hongmei Liu, Siran Zhang, Zhongbao Wang, Shaojun Fang","doi":"10.1002/mop.70051","DOIUrl":"https://doi.org/10.1002/mop.70051","url":null,"abstract":"<div>\u0000 \u0000 <p>In the paper, a compact wideband filtering quadrature coupler is proposed, which utilizes the inherent filtering feature of the unequal-width four-coupled-line (FCL) for the first time. Simply by assigning four terminals of the FCL as open-circuited, the functions of power division, quadrature phase, and inherent filtering response are obtained simultaneously within a wideband. It also has the merits of high directivity and low insertion loss. Since the proposed FDC has the inherent filtering feature without adding extra resonators, the size is the smallest (0.29<i>λ</i><sub>g</sub> × 0.13<i>λ</i><sub>g</sub>), and the structure is the simplest when compared with state-of-the-art wideband FDCs. Moreover, based on the derived universal impedance matrix of the unequal-width FCL, the FCL-based coupler, as well as other multiport circuits, can be theoretically analyzed. For validation, a prototype is implemented. Measurements show that the proposed coupler exhibits a bandwidth of over 45% under the conditions of 10-dB return loss, 10-dB isolation, 0.5-dB amplitude imbalance, and 5° phase difference error. Besides, the stopband rejection is more than 15 dB, and the rectangle coefficient (RC = |BW<sub>20 dB</sub>/BW<sub>3 dB</sub>|) reaches 1.74. Further, as a modification, the high-frequency selectivity characteristic (RC = 1.11) can be obtained by simply inserting <i>λ</i>/2 stepped impedance resonators with less influence on in-band performance and little increase in size.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"66 12","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762327","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-Wideband Slot Antenna With Simple Structure 结构简单的双宽带槽天线

IF 1 4区工程技术

Microwave and Optical Technology Letters Pub Date : 2024-12-04 DOI: 10.1002/mop.70041

Jun Xi Li, Jie Ju Huang, Fan Jiang, Liang Hua Ye, Jian-Feng Li, Yi Qiang Ni

引用次数: 0