2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)最新文献_第10页

A Ka Band Multi-Channel Integrated Receiver for Passive Millimeter Wave Imaging System 无源毫米波成像系统的Ka波段多通道集成接收机

2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8597829

Xi Chen, Xiuzhu Ye, Chao Wang, Anyong Hu, J. Miao

{"title":"A Ka Band Multi-Channel Integrated Receiver for Passive Millimeter Wave Imaging System","authors":"Xi Chen, Xiuzhu Ye, Chao Wang, Anyong Hu, J. Miao","doi":"10.23919/PIERS.2018.8597829","DOIUrl":"https://doi.org/10.23919/PIERS.2018.8597829","url":null,"abstract":"Passive millimeter wave imaging technology, with its harmless advantages to the human body, has been recognized as an important means to implement human security inspection. As the key component of the passive imager, the performance of the receiver directly determines the accuracy and stability of the whole system. Moreover, a passive imager usually use as an array radiometer, which requires a great quantity of receivers. So it is very important to study the high performance, low cost, miniaturized millimeter wave receiver. In this paper, a multichannel integrated receiver for Ka band is designed, machined and tested. That is, each receiver module contains 8 RF receiving channels working on 32 ~ 36 GHz, 8 independent LO operating at 9.875 GHz, and an IF output working from 3.5 to 7.5 GHz. The key parts of each receiving channel include: a)Waveguide-microstrip transition. Two kinds of structures are designed for the different polarization direction of the waveguide. One is the fin line form applied to a horizontally polarized waveguide and the other is a structure combining a ridge waveguide with a microstrip probe. b)Image reject filter implemented by microstrip circuit. c)Cascaded low noise amplifiers, mixer, multipliers active circuit. All of these circuit structures are realized on a complete Rodgers 5880 substrate (Er: 2.2, 254 μm thickness). After the final test, the module frequency conversion gain is 33 dB ± 7.5 dB adjustable. The Image rejection is greater than 26 dB. Noise figure is less than 4.5 dB. The most importance is that the receiver is more integrated and miniaturized, which is suitable for the array passive millimeter wave imaging system.","PeriodicalId":355217,"journal":{"name":"2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121829278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Precession Period Extraction of Axisymmetric Space Target from RCS Sequence via Convolutional Neural Network 基于卷积神经网络的RCS序列轴对称空间目标岁差周期提取

2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8597685

Jian Chen, Shiyou Xu, Pengjiang Hu, Wenzhen Wu, Jiangwei Zou, Zengping Chen

{"title":"Precession Period Extraction of Axisymmetric Space Target from RCS Sequence via Convolutional Neural Network","authors":"Jian Chen, Shiyou Xu, Pengjiang Hu, Wenzhen Wu, Jiangwei Zou, Zengping Chen","doi":"10.23919/PIERS.2018.8597685","DOIUrl":"https://doi.org/10.23919/PIERS.2018.8597685","url":null,"abstract":"The precession period was used to identify space targets in radar target recognition, especially the axisymmetric ballistic missile warheads and the similar shaped decoys. There are many precession period extraction methods based on RCS sequence. However, these methods have many restrictions and often yield poor results under noise condition. Aiming at extracting the precession period from RCS sequence, this paper designed a one-dimensional convolutional neural network. The precession period extraction is converted to a signal parameter estimation problem where the RCS sequence is the input signal and the period is the expected parameter. The proposed method was trained and validated on simulated RCS sequences and compared with spectral method, including CAUTOC, CAMDF, CAUTOC/CAMDF and trigonometric fitting method. The results showed that the proposed method yielded more accurate estimation results. Moreover, it can tell that there is no valid period by yielding a value that is not in the range [2, N /2]where $N$ is the length of the RCS sequence.","PeriodicalId":355217,"journal":{"name":"2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121349528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A Low-Voltage Gyrotron Backward-Wave Oscillator at 200 GHz 200ghz低压回旋管反向波振荡器

2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8598035

C. Hung, Y. Yeh, Tsun-Hsu Chang

{"title":"A Low-Voltage Gyrotron Backward-Wave Oscillator at 200 GHz","authors":"C. Hung, Y. Yeh, Tsun-Hsu Chang","doi":"10.23919/PIERS.2018.8598035","DOIUrl":"https://doi.org/10.23919/PIERS.2018.8598035","url":null,"abstract":"The gyrotrons are primarily developed for radars, plasma heating in controlled fusion reactors, and material processing, so they are usually operated at high voltages (about 100 kV) to generate high power coherent radiation in the millimeter to terahertz band. Recently, some high frequency applications require a relatively low-power gyrotron. In this paper, we analyze the stability and performance of a 200 GHz gyrotron backward-wave oscillator (gyro- BWO) operating at a beam voltage of 10 kV and a beam current of 0.5 A. The beam-wave interaction in a cylindrical waveguide is simulated by a single-mode, self-consistent nonlinear code. All the possible oscillating modes, including the operating mode and the competing modes, are considered. Simulation results show that the low-voltage gyro-BWO operating in the TE42 and the fundamental cyclotron harmonic is stable in the magnetic range of 73.5−77.0 kG. Under this stable operating condition, the low-voltage gyro-BWO was predicted to generate a peak power of 466 W with 9.3% efficiency and a frequency tuning bandwidth of 2.5 GHz using a uniform interaction waveguide. If the interaction waveguide is tapered to enhance the efficiency, the low- voltage gyro-BWO was predicted to generate a peak power of 1.25 kW with 25% efficiency and a frequency tuning bandwidth of 0.93 GHz.","PeriodicalId":355217,"journal":{"name":"2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125272226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of a Multi-Band Antenna for WLAN Application 无线局域网多波段天线的设计

2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8598164

X. J. Huang, F. Xie, M. Tong

引用次数: 0

A Novel Extraction Method for Melodic Features from MIDI Files Based on Probabilistic Graphical Models 基于概率图模型的MIDI文件旋律特征提取方法

2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8597928

Lan Chen, Y. Ma, J. Zhang, G. Wan, M. Tong

引用次数: 2

Design of Narrow Band Terahertz Waveguide Filters Including Power Handling Analysis 窄带太赫兹波导滤波器的设计及功率处理分析

2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8598058

A. Fahad, C. Ruan, T. Haq, Shahid Ullah

引用次数: 2

Quasi-Bound States in the Continuum in a Finite Chain of Dielectric Scatterers: Theory and Experiment 介电散射体有限链中连续体的准束缚态:理论与实验

2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8598011

M. Balyzin, Z. Sadrieva, M. Belyakov, P. Kapitanova, A. Sadreev, A. Bogdanov

引用次数: 0

A Millimetre Wave Embroidary Beam Forming Antenna Array for UWB Applications 一种用于超宽带应用的毫米波刺绣波束形成天线阵列

2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8598016

D. Kumar, M. Z. A. Khan

引用次数: 1

Characteristic Parameter Estimation of Chipless RFID Signals Based on USRP 基于USRP的无芯片RFID信号特征参数估计

2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8597660

J. Wan, Wen Jing Liu, L. Tang, M. Tong

引用次数: 0

Energy Efficient Performance Evaluation of XG-PON for Sustainable Green Communication Infrastructure 面向可持续绿色通信基础设施的XG-PON节能性能评价

2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8598106

A. M. Zin, S. M. Idrus, N. A. Ismail, A. Ramli, R. A. Butt

引用次数: 3