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2008 International Conference on Microwave and Millimeter Wave Technology最新文献

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On the design of wide-band and thin absorbers using the multiple resonances concept 用多共振概念设计宽频带薄吸收器
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540292
Z. Shen, B. Zheng, Zhilin Mei, Juan Yang, Wei Tang
{"title":"On the design of wide-band and thin absorbers using the multiple resonances concept","authors":"Z. Shen, B. Zheng, Zhilin Mei, Juan Yang, Wei Tang","doi":"10.1109/ICMMT.2008.4540292","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540292","url":null,"abstract":"This paper describes how one can design a wide-band and thin absorber using the multiple resonances concept. Employing a simplified and yet intuitive equivalent circuit model, we can demonstrate that a thin absorber with a wide bandwidth can be designed by introducing multiple resonant circuits in the substrate backed by a planar conductor whose radar cross-ection (RCS) is to be reduced. A few design examples, including double square-loop printed on a substrate, circuit analog (CA) absorber using multiple resistor-loaded dipoles, and shunt-series connection of transmission line structures are presented to demonstrate the wide-band performance of a thin absorber utilizing a structure with multiple resonances. Both simulated and measured results are provided and compared.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134182236","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: 22
Application of Hilbert-Huang transform to MMW Doppler radar 希尔伯特-黄变换在毫米波多普勒雷达中的应用
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540698
Wenwu Chen, Rushan Chen, D. Ding
{"title":"Application of Hilbert-Huang transform to MMW Doppler radar","authors":"Wenwu Chen, Rushan Chen, D. Ding","doi":"10.1109/ICMMT.2008.4540698","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540698","url":null,"abstract":"A millimeter wave (MMW) Doppler radar is introduced. As the Doppler shift is directly proportional to the target speed, the echo is a linear frequency modulated (LFM) signal if the target speed changes linearly. Especially, multicomponent LFM signal exists if the radar is used to analyze the distributed target. The conventional time-frequency analysis methods including short-time Fourier transform (STFT), Wigner-Ville distribution (WVD), and wavelet analysis are not generally adaptive to nonstationary signals. A new approach is proposed to analyze multicomponent LFM signals based on Radon transform and Hilbert-Huang transform (HHT) which is a recently developed method adaptive to nonstationary signals. The echo is decomposed into several intrinsic mode functions (IMF) by the empirical mode decomposition (EMD). After the instantaneous frequency and Hilbert spectrum corresponding to IMFs are computed, target velocity parameter estimation is obtained using Radon transform on the Hilbert spectrum plane. The simulation result shows its feasibility and effectiveness.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134352614","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 cost trigger frequency alterable ultra-wide band ambipolar pulses generator 一种低成本的触发变频超宽带双极脉冲发生器
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540344
Jianping Lai, Qing Hao, J. She, Zhenghe Feng
{"title":"A low cost trigger frequency alterable ultra-wide band ambipolar pulses generator","authors":"Jianping Lai, Qing Hao, J. She, Zhenghe Feng","doi":"10.1109/ICMMT.2008.4540344","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540344","url":null,"abstract":"A trigger frequency alterable and low cost ultra-wide band (UWB) ambipolar pulses generator using step recovery diodes (SRD) has been developed and tested. This pulse generator can produce both positive and negative picoseconds pulses at the same time. Triggered by source signal from 100 Hz to 10 MHz, the output pulses are nearly the same. The parameters of the positive pulse is 250ps rise time (10%-90%), 250ps width (50%-50%), 250ps fall time (10%-90%), and 4.35V peak amplitude, while that of the negative pulse is 300 ps rise time (10%-90%), 250 ps width (50%-50%) and 150 ps fall time (10%-90%), and -3.16 V peak amplitude. The circuit is all made up of inexpensive components, and it can be used in UWB sampling circuits as sampling pulse generator.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"219 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131732575","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: 12
Investigation of material identification with terahertz pulsed imaging 用太赫兹脉冲成像技术鉴别材料的研究
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540705
Yingxin Wang, Ziran Zhao, Zhiqiang Chen, Li Zhang, Kejun Kang
{"title":"Investigation of material identification with terahertz pulsed imaging","authors":"Yingxin Wang, Ziran Zhao, Zhiqiang Chen, Li Zhang, Kejun Kang","doi":"10.1109/ICMMT.2008.4540705","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540705","url":null,"abstract":"Terahertz pulsed imaging provides a wealth of information about the terahertz response of the material under test. We investigate the identification and classification of explosives and common materials based on their terahertz absorption spectra obtained by this spectroscopic imaging technique. In the classification experiment, an accuracy of 96.6% is achieved by using Fisher's linear discriminant analysis for dimensionality reduction of the original spectral data set and support vector machine classifier for classification.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117311880","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
Dual-mode bandpass filter using defected ground structures for coupling enhancement and harmonic suppression 采用缺陷接地结构的双模带通滤波器用于耦合增强和谐波抑制
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540391
W. Kang, W. Hong, Jianyi Zhou
{"title":"Dual-mode bandpass filter using defected ground structures for coupling enhancement and harmonic suppression","authors":"W. Kang, W. Hong, Jianyi Zhou","doi":"10.1109/ICMMT.2008.4540391","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540391","url":null,"abstract":"In this paper, a dual-mode square ring bandpass filters with defected-ground structures (DGS) is proposed. By employing the DGS, the coupling is enhanced and the insertion loss is reduced effectively. The harmonic suppression is achieved by loading DGS structures under the input/output lines. Good agreement between the experimental and simulation results is observed.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130889450","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
A millimeter-wave monopulse front-end based on IF sum-difference network and spatial power combining 基于中频和差网络和空间功率组合的毫米波单脉冲前端
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540340
Qiang Xu, Houjun Sun, H. Yang, Weihua Yu, Yaping Chen
{"title":"A millimeter-wave monopulse front-end based on IF sum-difference network and spatial power combining","authors":"Qiang Xu, Houjun Sun, H. Yang, Weihua Yu, Yaping Chen","doi":"10.1109/ICMMT.2008.4540340","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540340","url":null,"abstract":"A high performance millimeter-wave(MMW) front- end based on intermediate frequency(IF) monopulse sum and difference network in receiving and spatial power combining in transmitting was designed and realized. The front-end consists of four hybrid millimeter wave T/R modules and a microstrip antenna with four subarrays. Phase consistency of four transmitting channels and four receiving channels can be adjusted by dielectric loaded microstrip transmission line. Gain of transmitting sum beam is better than 29.5 dB. Gain of receiving sum beam is about 28.2 dB, and that for difference beam is 25 dB.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132179486","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: 5
Temperature sensor based on iodine-doped hollow core photonic crystal fiber 基于掺碘空心光子晶体光纤的温度传感器
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540547
Yew-Chuhg Wu, I. Li, S. Ruan, J. Zhai
{"title":"Temperature sensor based on iodine-doped hollow core photonic crystal fiber","authors":"Yew-Chuhg Wu, I. Li, S. Ruan, J. Zhai","doi":"10.1109/ICMMT.2008.4540547","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540547","url":null,"abstract":"Optical transmission property of iodine-doped hollow core photonic crystal fiber has been investigated in the temperature range of 300 K ~ 500 K. The transmitted light intensity is decreased dramatically with increasing temperature. The slope of the temperature-dependent intensity-curve is 3.3x10-3 dB/K.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132264995","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
Noise-modulated oppressive jamming for DPC MAB SAR DPC MAB SAR的噪声调制压制干扰
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540894
Lin Dong, Peiguo Liu
{"title":"Noise-modulated oppressive jamming for DPC MAB SAR","authors":"Lin Dong, Peiguo Liu","doi":"10.1109/ICMMT.2008.4540894","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540894","url":null,"abstract":"Wind-swath SAR can satisfy the requirement in both high spatial resolution and wide-swath coverage in the same time. As a typical application of wind-swath SAR, displaced phase centers (DPC) multiple azimuth beam (MAB) SAR has an inimitable operating process compare with the conventional SAR system. The paper discuss the possibility of jamming DPC MAB SAR by modulated noise jamming, and provide a simulation result of this situation.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131309707","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: 1
Analysis of electromagnetic propagation into reinforced concrete walls by FEM-PML methods 用FEM-PML法分析钢筋混凝土墙体内电磁传播
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540805
Liu Ping, Qi-tao Yang, Yun-liang Long
{"title":"Analysis of electromagnetic propagation into reinforced concrete walls by FEM-PML methods","authors":"Liu Ping, Qi-tao Yang, Yun-liang Long","doi":"10.1109/ICMMT.2008.4540805","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540805","url":null,"abstract":"A finite element-perfectly matched layer method (FEM-PML) is presented to analyze the electromagnetic wave propagation into reinforced concrete wall. Floquet's theorem is used to reduce the calculation of reinforce concrete wall. The parameters influence the propagation through reinforced concrete wall, such as the steel diameter, the length of meshes and the thickness are studied. The electric field values in the propagation direction into the reinforced concrete wall are given out. The results are useful for the study of indoor wireless communication and the electromagnetic shielding effect of concrete architectures.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133800252","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: 8
Electromagnetic complex scattering for a sphere and a conducting plank in K-wave band k波段球形和导电板的电磁复散射
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540480
Yingle Li, Ji‐ying Huang, Ming-jun Wang
{"title":"Electromagnetic complex scattering for a sphere and a conducting plank in K-wave band","authors":"Yingle Li, Ji‐ying Huang, Ming-jun Wang","doi":"10.1109/ICMMT.2008.4540480","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540480","url":null,"abstract":"The electromagnetic interaction between a target and a conducting plank is investigated utilizing the electromagnetic images method. The complex scattering Held is presented. The scattering cross section in which the electromagnetic interaction has been included is also educed and the simulation is consistent to experiment. Results show that in a definite distance the electromagnetic interaction is least in the medium wave band. In K- wave band, the error induced by the electromagnetic mutual effect between a large scale target and the conducting plank arrive to 20~30%. Comparing with the change versus frequency, the target size affects the complex scattering distinctively, which presents a theoretical reference for electric system design and electromagnetic compatibility.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115361643","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
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