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2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)最新文献

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60 GHz coplanar waveguide couplers and slotline transition on polished beryllium oxide 抛光氧化铍上60 GHz共面波导耦合器和槽线跃迁
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.967133
B. Lakshminarayanan, T. Weller, M. Oldenburg
{"title":"60 GHz coplanar waveguide couplers and slotline transition on polished beryllium oxide","authors":"B. Lakshminarayanan, T. Weller, M. Oldenburg","doi":"10.1109/MWSYM.2001.967133","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.967133","url":null,"abstract":"This paper presents results for mm-wave coplanar waveguide couplers and a low loss slotline transition that are printed on polished beryllium oxide (BeO). BeO offers excellent microwave properties including a low loss tangent (0.0003) and high thermal conductivity. Included is the design of an optimized quadrature coupler with insertion loss around /spl sim/3.7 dB at 60 GHz.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"273 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124416341","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
Power absorption and temperature elevations induced in the human head by dual-band phones 双频手机对人体头部的能量吸收和温度升高
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.966860
P. Bernardi, M. Cavagnaro, S. Pisa, E. Piuzzi
{"title":"Power absorption and temperature elevations induced in the human head by dual-band phones","authors":"P. Bernardi, M. Cavagnaro, S. Pisa, E. Piuzzi","doi":"10.1109/MWSYM.2001.966860","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.966860","url":null,"abstract":"A numerically efficient way to evaluate SAR deposition and temperature elevation inside the head of a user of a cellular phone equipped with a dual-band helical antenna is proposed. The results obtained for a given radiated power show that, although the maximum SAR value as averaged over 1 g in the brain is higher at 900 MHz than at 1800 MHz, the maximum temperature increase in the brain is higher at 1800 MHz. In fact, at 1800 MHz the thermal diffusion process moves heat from the external layers, where SAR values higher than those obtained at 900 MHz are present, toward the brain.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114669879","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 multiport waveguide structures by a higher-order FDTD methodology based on non-orthogonal curvilinear grids 基于非正交曲线网格的多端口波导结构高阶时域有限差分分析
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.967315
N. Kantartzis, M. Gatzianas, T. Kosmanis, T. Tsiboukis
{"title":"Analysis of multiport waveguide structures by a higher-order FDTD methodology based on non-orthogonal curvilinear grids","authors":"N. Kantartzis, M. Gatzianas, T. Kosmanis, T. Tsiboukis","doi":"10.1109/MWSYM.2001.967315","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.967315","url":null,"abstract":"A generalized methodology for the construction of nonstandard higher-order finite-difference time-domain schemes, as well as their application to complex electromagnetic problems in curvilinear non-orthogonal coordinate systems, are presented in this paper. As a consequence, a new class of low-dispersion operators is designed for the approximation of spatial and temporal derivatives. Their extension to curvilinear non-orthogonal coordinates is attained by a higher-order variation of the covariant and contravariant vector component theory, in which all metric terms are taken into account. Finally, the proposed method is validated by the analysis of diverse multiport microwave structures with realistic features.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116930173","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
Development and application of an efficient FDTD/Haar MRTD numerical interface 高效FDTD/Haar MRTD数值界面的开发与应用
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.967002
C. Sarris, L. Katehi
{"title":"Development and application of an efficient FDTD/Haar MRTD numerical interface","authors":"C. Sarris, L. Katehi","doi":"10.1109/MWSYM.2001.967002","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.967002","url":null,"abstract":"A numerically stable interface between the Haar wavelet based MRTD technique and FDTD is presented in this paper. Such a hybridization of MRTD facilitates the application of the method to open structures and inhomogeneous circuit geometries, where the use of high order wavelets significantly complicates the formulation of a pure MRTD scheme. Furthermore, it allows for the straightforward enforcement of localized boundary conditions, bypassing the necessity to employ image theory, which typically arises in MRTD. The fact that the implementation of the proposed interface involves no spatial or temporal interpolation indicates the efficiency of the developed technique.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127117913","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: 7
RF LDMOS characterization and its compact modeling 射频LDMOS特性及其紧凑建模
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.967053
Jaejune Jang, O. Tornblad, T. Arnborg, Qiang Chen, K. Banerjee, Zhiping Yu, R. Dutton
{"title":"RF LDMOS characterization and its compact modeling","authors":"Jaejune Jang, O. Tornblad, T. Arnborg, Qiang Chen, K. Banerjee, Zhiping Yu, R. Dutton","doi":"10.1109/MWSYM.2001.967053","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.967053","url":null,"abstract":"This paper presents characterization of power LDMOS using device simulation and analytical modeling. Features of the LDMOS such as graded channel and quasi-saturation effect which result in a peculiar behavior on capacitance and nonlinear LDD resistance are analyzed and modeled using device simulation. A compact model for LDMOS is implemented in HSPICE based on additional lumped elements, combined with the BSIM3 MOSFET model.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125182614","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: 35
Nonlinear distortion suppression in directly modulated DFB lasers by sidemode optical injection 侧模光注入抑制直调DFB激光器非线性畸变
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.966954
J. Seo, Y. Seo, W. Choi
{"title":"Nonlinear distortion suppression in directly modulated DFB lasers by sidemode optical injection","authors":"J. Seo, Y. Seo, W. Choi","doi":"10.1109/MWSYM.2001.966954","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.966954","url":null,"abstract":"We demonstrate a new method of suppressing nonlinear distortions in directly modulated DFB lasers. In our scheme, external laser light is injected into the sidemode of the DFB laser. Using this scheme, we achieved significant reduction in nonlinear distortions such as the second harmonic distortion (SHD), second order intermodulation distortion (IMD2), and third order intermodulation distortion (IMD3). In addition, we enhanced the external light detuning range.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125193821","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: 15
A novel method for closed-loop error correction microwave and millimeter wave QPSK modulator 微波和毫米波QPSK调制器的闭环误差校正新方法
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.966948
A. Madjar, T. Blum, M. Namer, I. Itzkovic, B. Zusmanovic
{"title":"A novel method for closed-loop error correction microwave and millimeter wave QPSK modulator","authors":"A. Madjar, T. Blum, M. Namer, I. Itzkovic, B. Zusmanovic","doi":"10.1109/MWSYM.2001.966948","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.966948","url":null,"abstract":"QPSK modulators at microwave and millimeter waves can be very useful for direct modulation communication links. The main problem with such modulators is the error in phase and amplitude balance, which is quite large at MM-waves and degrades the performance of the modulator (carrier rejection, deviation from 90 degrees between states, etc.). In this paper we introduce a novel approach featuring an error correction scheme, which is simple to implement both in hybrid and MMIC forms. A very important feature of the new method is the self-generated reference signal, which enables a simple (low cost) and self contained implementation in a MMIC form of a high quality QPSK MM-wave modulator.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126083948","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
LTCC-MLC balun for WLAN/Bluetooth 好吧，希望有用处
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.966896
J. Sheen, Ching‐Wen Tang
{"title":"LTCC-MLC balun for WLAN/Bluetooth","authors":"J. Sheen, Ching‐Wen Tang","doi":"10.1109/MWSYM.2001.966896","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.966896","url":null,"abstract":"A low temperature co-fired ceramic (LTCC) multi-layer ceramic balun is presented in this paper. This balun is designed in the ISM band for WLAN or Bluetooth use. It uses multi-layer structure, meander lines, and multi-section coupled-lines with various coupling coefficients. The characteristics of phase balance and amplitude balance are extremely excellent because of its symmetric structure and a transmission line trimming section. Measured results of the LTCC-MLC balun match well with the computer simulation.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"1077 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123338786","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: 13
A GaAs MESFET transient model capable of predicting trap-induced memory effects under complex digital modulation 一种能够预测复杂数字调制下陷阱诱导记忆效应的GaAs MESFET瞬态模型
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.967016
F. Wang, W. Jemison, J.C.M. Hwangy
{"title":"A GaAs MESFET transient model capable of predicting trap-induced memory effects under complex digital modulation","authors":"F. Wang, W. Jemison, J.C.M. Hwangy","doi":"10.1109/MWSYM.2001.967016","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.967016","url":null,"abstract":"A transient model for GaAs MESFETs is presented that can predict distortion of digitally modulated carrier waveforms due to memory effects induced by both low-frequency dispersion and gate-lag. Experimental and simulated results are presented which demonstrate, for the first time, the successful prediction of these effects for multilevel pulse modulated waveforms.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125389485","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
Study of design parameters in waveguide-based spatial power combining amplifier arrays using FDTD 基于FDTD的波导空间功率组合放大器阵列设计参数研究
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.967159
M. Ozkar, G. Lazzi, A. Mortazawi
{"title":"Study of design parameters in waveguide-based spatial power combining amplifier arrays using FDTD","authors":"M. Ozkar, G. Lazzi, A. Mortazawi","doi":"10.1109/MWSYM.2001.967159","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.967159","url":null,"abstract":"Performance measures such as active reflection coefficients, inter-element coupling and excitation uniformity for spatial power combining arrays are investigated. A coax-fed patch antenna array inside an oversized dielectric loaded waveguide is analyzed using a standard finite difference time domain (FDTD) approach with unsplit perfectly matched layer (PML) formulation. Results for a passive 4/spl times/4 waveguide-based quasi-optical array are presented as an example. The effects of design parameters (such as inter-element spacing and the distance of the array to the waveguide walls) on the performance of the array has been investigated for the 4/spl times/4 array example.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115101367","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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