Journal of electromagnetic engineering and science最新文献_第2页

Development of Transmission Line Employing Graphene-silver Nanowire/PET Structure for Application in Flexible and Wearable Devices in X-band Wireless Communication Systems 开发采用石墨烯-银纳米线/PET 结构的传输线，以应用于 X 波段无线通信系统中的柔性可穿戴设备

IF 2.3 3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2023-11-28 DOI: 10.26866/jees.2024.1.r.198

Hyun-Soo Oh, Sooyeon Jeong, Young Yun, Seung Yol Jeong

引用次数: 0

Clutter Rejection for FM Ranging Airborne Radar 调频测距机载雷达杂波抑制

3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2023-10-30 DOI: 10.26866/jees.2023.6.r.190

Ji Hwan Yoon, Yong Min Kim

{"title":"Clutter Rejection for FM Ranging Airborne Radar","authors":"Ji Hwan Yoon, Yong Min Kim","doi":"10.26866/jees.2023.6.r.190","DOIUrl":"https://doi.org/10.26866/jees.2023.6.r.190","url":null,"abstract":"In airborne radar, it is important to reject clutter signals to detect targets of interest. High pulse repetition frequency (HPRF) waveform provides robust detection performance in a clutter environment by separating clutter signals from the target echo signals in a Doppler frequency domain, but it suffers from range ambiguity. The range ambiguity in HPRF can be resolved by frequency modulation (FM) ranging. However, the Doppler frequencies of both the clutter and target echo signals change linearly with the range due to changes in the carrier frequency in FM ranging. In such a case, the target echo signal can be rejected by a conventional clutter rejection frequency even if it is not masked by a clutter signal. This paper proposes an optimum clutter rejection frequency for FM ranging airborne radar by considering the Doppler frequency spread in FM ranging. The optimum clutter rejection frequency is derived by calculating the maximum Doppler frequency of the spread clutter signal caused by FM ranging. The simulation and flight test results verify that the proposed clutter rejection frequency is the optimum value that can improve the detection capability of FM ranging airborne radar.","PeriodicalId":15662,"journal":{"name":"Journal of electromagnetic engineering and science","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136103501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Broadband All-Metal Vivaldi Array Antenna with Pyramidal-Shaped Wings for LEO Satellite Applications 用于低轨卫星的金字塔翼宽带全金属维瓦尔第阵列天线

3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2023-09-30 DOI: 10.26866/jees.2023.5.r.184

Doyoung Jang, Tae Heung Lim, Seulgi Park, Hosung Choo

{"title":"Broadband All-Metal Vivaldi Array Antenna with Pyramidal-Shaped Wings for LEO Satellite Applications","authors":"Doyoung Jang, Tae Heung Lim, Seulgi Park, Hosung Choo","doi":"10.26866/jees.2023.5.r.184","DOIUrl":"https://doi.org/10.26866/jees.2023.5.r.184","url":null,"abstract":"In this paper, we propose an all-metal Vivaldi antenna with pyramidal-shaped conductive wings for use in satellite signal intelligence applications. The inner metal Vivaldi antenna consists of radiating flares and a transition part between the feeder and the flares. The curvature of the inner flares is optimized, while the outer edges of the radiating flares are connected to the pyramidal-shaped wings to obtain a higher antenna gain over the entire operating frequency band. To verify the antenna’s feasibility, performance aspects such as the reflection coefficient, the radiation patterns, and the boresight gain are measured in a full anechoic chamber. The fractional bandwidth of the proposed antenna is 54%, while the boresight gain is greater than 7.3 dBi in the frequency range from 8 GHz to 12 GHz. To examine array performance aspects such as the total gain and beam steering, the proposed Vivaldi antenna is extended to a 4 × 1 linear array configuration. When the main beam is steered from 0° to 15°, the maximum gain is varied from 14.5 dBi to 13.7 dBi, while the side lobe level is decreased from 11.2 dB to 6.3 dB.","PeriodicalId":15662,"journal":{"name":"Journal of electromagnetic engineering and science","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135039939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Investigation of Harmonic Oscillation of an Ion Particle in a Non-uniform Electrostatic Field 离子粒子在非均匀静电场中的谐振振荡研究

3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2023-09-30 DOI: 10.26866/jees.2023.5.r.186

Jatupon Em-Udom, Nattapon Jaisumroum

引用次数: 0

An I-Shaped Slot Grid Antenna Array with Substrate Integration and Enhanced Bandwidth 具有基板集成和增强带宽的i形槽网格天线阵列

3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2023-09-30 DOI: 10.26866/jees.2023.5.r.188

Zhiyi Li, Shengjie Wang, Fan Li, Lin Lin, Hongzheng Zeng

引用次数: 0

Hybrid Sidelobe Recognition Method Using Boresight Error and Quadrant Signal Difference for Monopulse Array 基于轴视误差和象限信号差的单脉冲阵列混合旁瓣识别方法

3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2023-09-30 DOI: 10.26866/jees.2023.5.r.185

Daewoong Woo, Jung-Won Lee, Kyu Young Hwang, Deok Kyu Kong

引用次数: 0

Improved Ground Radiation Antenna Performance for a Vertically Attached PCB 垂直连接PCB的改进地面辐射天线性能

3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2023-09-30 DOI: 10.26866/jees.2023.5.l.18

Seokju Wi, Hoseung Lee, Jeonghwan Kim, Rui Li, Hyunwoong Shin, Hyeongdong Kim

引用次数: 0

Unified GSTC-FDTD Algorithm for the Efficient Electromagnetic Analysis of 2D Dispersive Materials 二维色散材料高效电磁分析的统一GSTC-FDTD算法

3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2023-09-30 DOI: 10.26866/jees.2023.5.r.187

Sangeun Jang, Jae-Woo Baek, Jeahoon Cho, Kyung-Young Jung

引用次数: 0

Design of a Dual-Mode Waveguide CP Antenna with a Symmetric Beamwidth Using Short Stub for Low-Orbit Satellite TC&R 基于短存根的低轨道卫星对称波束宽双模波导CP天线设计

3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2023-09-30 DOI: 10.26866/jees.2023.5.r.183

Dong-Su Choi, Yoon-Seon Choi, Hyo-Jin Lee, Sun-Ik Lee, Jong-Myung Woo

{"title":"Design of a Dual-Mode Waveguide CP Antenna with a Symmetric Beamwidth Using Short Stub for Low-Orbit Satellite TC&amp;R","authors":"Dong-Su Choi, Yoon-Seon Choi, Hyo-Jin Lee, Sun-Ik Lee, Jong-Myung Woo","doi":"10.26866/jees.2023.5.r.183","DOIUrl":"https://doi.org/10.26866/jees.2023.5.r.183","url":null,"abstract":"In this study, a dual-mode waveguide circularly polarized antenna for TC&R (telemetry, command, and ranging) was proposed for the communication between a low-orbit satellite and a ground station. The proposed antenna required both a wide -10 dB bandwidth and axial ratio bandwidth of 7.1–7.3 GHz and 8.0–8.4 GHz. The antenna was designed with a stepped septum inside a square waveguide to obtain circular polarization and the axial ratio wide bandwidth. Next, a dual-mode synthesis method was adopted for link budgeting by combining square and circular waveguides. The requirement was that the co-polarization level with a symmetric -3 dB beamwidth of 39° must be -5 dBic or higher at ±76.5°, and the cross-polarization level must average -15 dBic or lower at ±76.5°. Finally, the corrugate structure attached to the outside of the extended circular waveguide was offset in multiple steps to suppress the back lobe of the crosspolarization As a result, the axial ratio maintained an average of 1.8 dB at 0° within each band of the required frequency. In addition, the co-polarization obtained an average of -4.52 dBic in the 7.2 GHz band and -5.31 dBic in the 8.2 GHz band at ±76.5°. Finally, in the case of the cross-polarization pattern, the back lobe level was suppressed by 9.89 dB at 7.2 GHz by the corrugate structure, and an average value of -19.9 dBic or less was obtained at ±76.5°. The proposed antenna was confirmed to be effective as a Korean low-orbit satellite TC&R antenna with a radiation pattern of a symmetric beamwidth.","PeriodicalId":15662,"journal":{"name":"Journal of electromagnetic engineering and science","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135039502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Novel Multi-Band Substrate-Integrated Waveguide Antenna and Extension to a Deca-Band Antenna 新型多频带基板集成波导天线及十频带天线的扩展

3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2023-09-30 DOI: 10.26866/jees.2023.5.l.17

Youngje Sung

引用次数: 0