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The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology最新文献

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Design of a single-layer waveguide slot array antenna 单层波导槽阵天线的设计
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238130
Zheng Yi, Yang Guoqing, Song Shi-ming
{"title":"Design of a single-layer waveguide slot array antenna","authors":"Zheng Yi, Yang Guoqing, Song Shi-ming","doi":"10.1109/MMWCST.2012.6238130","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238130","url":null,"abstract":"In this paper, a single-layer millimeter-wave waveguide slot array antenna is presented. The sidelobe is suppressed below 20dBc by using the waveguide feed network with the Chebyshev distribution. With the advantages of the combination with the machining and PCB processing, the BW for VSWR below 1.5 is more than 500MHz, and the gain is 27.9dBi. The low thickness and small volume single-layer waveguide slot array antenna is low cost, and widely using in the system with size limited and high performance requirements.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127795389","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
Research on self-multiplication for the solution of GPS signal acquisition GPS信号采集解决方案的自乘法研究
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238189
Zeng Chao, Teng Yun-long, Zhang Wei
{"title":"Research on self-multiplication for the solution of GPS signal acquisition","authors":"Zeng Chao, Teng Yun-long, Zhang Wei","doi":"10.1109/MMWCST.2012.6238189","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238189","url":null,"abstract":"Acquisition of a weak GPS signal faces such challenges as possible bit reversal every 0.02 s and tolerable frequency error inversely proportional to integration interval. Coherent methods can solve these problems efficiently, but these methods need enormous computation and have to work in high-end receivers. This paper presents a new method in software receiver with self-multiplication to avoid all of these problems and simplify the acquisition process dramatically. Besides, the method is able to handle large frequency offset and implement easily.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127539616","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 and simulation for Q-band folded waveguide traveling-wave tube q波段折叠波导行波管的设计与仿真
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238215
Bin Wang, H. Gong, Qinghua Lin, Sanping Shen
{"title":"Design and simulation for Q-band folded waveguide traveling-wave tube","authors":"Bin Wang, H. Gong, Qinghua Lin, Sanping Shen","doi":"10.1109/MMWCST.2012.6238215","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238215","url":null,"abstract":"In this paper, a Q-band traveling-wave tube (TWT) was designed and simulated with a Folded Waveguide (FWG) as its slow wave structure. Through simulation, we got a conclusion that when the beam voltage is 20KV, the beam current is 0.15A, the FWG TWT can output over 200 watts of power in 43.5-45.5GHz. Because this type of TWT can be easily manufactured and assembled with high output power and low-cost, the Q-band traveling-wave tube should have good prospects in the communication area.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128215867","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
Compact ultra-wideband antenna with inverted U-shaped slot and parachute-like radiation patch 紧凑的超宽带天线，带倒u型槽和伞状辐射贴片
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238170
L. Xiong, P. Gao
{"title":"Compact ultra-wideband antenna with inverted U-shaped slot and parachute-like radiation patch","authors":"L. Xiong, P. Gao","doi":"10.1109/MMWCST.2012.6238170","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238170","url":null,"abstract":"A simple and compact wide-slot antenna for ultra-wideband application is presented. The antenna consists of an inverted U-shaped slot on a printed circuit board ground plane and a parachute-like radiation patch which is fed by a 50-Ω microstrip line. The antenna is built on a standard low-cost FR4 substrate with a whole size of 22*30*1 mm3. The measured and simulated results agree well and it indicates that the antenna has a measured impedance bandwidth varying from 2.75 to 20 GHz for S11 ≤ -10 dB. In addition, the antenna shows nearly omnidirectional radiation pattern and stable gain within its operating band.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128451176","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
A L-band transceiver front-end for ADS-B system 一种用于ADS-B系统的l波段收发器前端
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238187
D. Shen, L. Jin, L. Zhou, Z. F. Dan
{"title":"A L-band transceiver front-end for ADS-B system","authors":"D. Shen, L. Jin, L. Zhou, Z. F. Dan","doi":"10.1109/MMWCST.2012.6238187","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238187","url":null,"abstract":"In this paper, a T/R front-end based on Automatic Dependent Surveillance Broad-cast (ADS-B) is proposed. The transmitter front-end with ASK/BPSK modulators and the receiver are installed in two different metal boxes. Experimental results of the front-end verify that the phase noise of the PLL module is lower than -90dBc/Hz at 10KHz offset from carrier of 1090MHz, and the peak output pulse power of the transmitter is more than 51dBm. And the noise figure of receiver measured is lower than 2.5dB. The overall power consumption of the PLL module, modulators and the power amplifier module is about 4.35W.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"180 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134250484","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: 6
Dislocation induced nonuniform surface morphology of Ti/Al/Ni/Au Ohmic contacts to AlGaN/GaN HEMTs 位错导致Ti/Al/Ni/Au欧姆接触到AlGaN/GaN HEMTs的表面形貌不均匀
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238122
Xin Kong, K. Wei, Guoguo Liu, Jianhui Wang, Xinyu Liu
{"title":"Dislocation induced nonuniform surface morphology of Ti/Al/Ni/Au Ohmic contacts to AlGaN/GaN HEMTs","authors":"Xin Kong, K. Wei, Guoguo Liu, Jianhui Wang, Xinyu Liu","doi":"10.1109/MMWCST.2012.6238122","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238122","url":null,"abstract":"In this study, Ti/Al/Ni/Au Ohmic contact to AlGaN/GaN high electron mobility transistors was fabricated and demonstrated distribution of bright and dark areas on the surface. Surface element analyses show that it is of great difference in the Ni and Au content between these two kinds of regions. According to transmission electron microscopy and corresponding Electron dispersive x-ray spectroscopy analyses, plenty of Ni was detected in dislocation rich regions while rare Ni was left in dislocation free regions so that Au tended to accumulate in the form of AlAux binary alloy. The surface nonuniformity presented on the surface should be attributed to the nonuniform interfacial reactions resulted from the dislocations.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133010102","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
Unconditionally stable FETD method using Laguerre polynomials for eigenvalue problems 特征值问题的拉盖尔多项式无条件稳定FETD方法
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238176
Guo-Qiang He, W. Shao, Xiao-Liang Ma
{"title":"Unconditionally stable FETD method using Laguerre polynomials for eigenvalue problems","authors":"Guo-Qiang He, W. Shao, Xiao-Liang Ma","doi":"10.1109/MMWCST.2012.6238176","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238176","url":null,"abstract":"This paper presents an unconditionally stable finite-element time-domain (FETD) scheme to solve time-dependent vector wave equations for eigenvalue problems. With the weighted Laguerre polynomials as basis functions and Galerkin's testing procedure, the temporal derivative in the vector wave equation can be handled analytically. Combined with the discrete Fourier transform (DFT), the Laguerre-FETD method is applied to the solution of eigenvalue problems. The numerical example of a circle dielectric-loaded waveguide shows its advantages of accuracy and efficiency.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127849692","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
An advanced equivalent slant range model and image formation in geosynchronous SAR 一种先进的地球同步SAR等效倾斜距离模型及成像方法
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238179
Xiu Wu, Shunsheng Zhang, Bo Xiao
{"title":"An advanced equivalent slant range model and image formation in geosynchronous SAR","authors":"Xiu Wu, Shunsheng Zhang, Bo Xiao","doi":"10.1109/MMWCST.2012.6238179","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238179","url":null,"abstract":"Synthetic aperture radar on geosynchronous satellite (GEO SAR) has significant potential advantages over conventional low Earth orbit radars, albeit it also has challenges to overcome. In GEO SAR, the imaging geometry is more complicated and the range and azimuth variances are more severe. In order to deal with these problems, this paper presents an advanced equivalent slant range (AESR) model for the synthetic aperture radar undergoing an inclined circular orbit. Furthermore, the range and phase error between AESR model and conventional slant range model are also gauged in detail. Meanwhile, based on the AESR model, the accurate two dimensional (2-D) frequency spectrum (PTFS) expression of point target is obtained. And the modified algorithm and simulation results validate the AESR and show its advantages in image formation in GEO SAR cases.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114675080","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: 3
A raw echo simulation algorithm based on equivalent scatterer for bistatic SAR 一种基于等效散射体的双基地SAR原始回波仿真算法
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238198
Yi Lu, Shun-sheng Zhang, Jianshu Cao
{"title":"A raw echo simulation algorithm based on equivalent scatterer for bistatic SAR","authors":"Yi Lu, Shun-sheng Zhang, Jianshu Cao","doi":"10.1109/MMWCST.2012.6238198","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238198","url":null,"abstract":"In this paper, a fast raw echo simulation algorithm based on equivalent scatterer is proposed for bistatic SAR, which has high accuracy and efficiency. Firstly, the echo model of bistatic SAR is established. Then, the theory of the algorithm is deduced. Lastly, the raw echo of point, lattice target and natural scene are simulated. The validity and correctness of the algorithm are verified through imaging result and quantitative indicators.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127278339","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
Modeling and processing strategies of ultra-high speed moving target echo in near space 近空间超高速运动目标回波建模与处理策略
The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI: 10.1109/MMWCST.2012.6238153
Hongjuan Lin, Hongming Liu, Jinfeng Hu, Jun Li
{"title":"Modeling and processing strategies of ultra-high speed moving target echo in near space","authors":"Hongjuan Lin, Hongming Liu, Jinfeng Hu, Jun Li","doi":"10.1109/MMWCST.2012.6238153","DOIUrl":"https://doi.org/10.1109/MMWCST.2012.6238153","url":null,"abstract":"In recent years, near space has been a new research hotpot in the military field. Near space ultra-high speed moving target is a new case for radar target detection. This paper tries to establish the echo model of the ultra-high speed moving target and analyze its effect on the conventional processing of pulse Doppler radar. According to the characteristics of the near space ultra-high speed moving target, the target detection strategies are also proposed. Simulation results show the relationship of coherent integration, the radial and tangential velocity of the target and the bandwidth of the transmitting signals.","PeriodicalId":150727,"journal":{"name":"The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131679795","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
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