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

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Fast analysis and optimization of combline filters using FEM 组合式滤波器的有限元快速分析与优化
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.967097
Daniel G. Swanson, Robert J. Wenzel, Agoura Hills
{"title":"Fast analysis and optimization of combline filters using FEM","authors":"Daniel G. Swanson, Robert J. Wenzel, Agoura Hills","doi":"10.1109/MWSYM.2001.967097","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.967097","url":null,"abstract":"We analyze a combline filter using the Finite Element Method (FEM) with ports where the tuning screws would normally be. The filter is tuned with a circuit simulator using the multiport S-parameter data and lumped capacitors at the ports. We can then optimize the combline filter very rapidly by mapping the \"coarse\" circuit model to the \"fine\" FEM model. This optimization is shown to converge in one iteration, with a good starting point.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"44 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":"121774951","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: 70
Design of high directivity directional couplers in multilayer ceramic technologies 多层陶瓷技术中高指向性定向耦合器的设计
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.966837
S. Al-Taei, P. Lane, G. Passiopoulos
{"title":"Design of high directivity directional couplers in multilayer ceramic technologies","authors":"S. Al-Taei, P. Lane, G. Passiopoulos","doi":"10.1109/MWSYM.2001.966837","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.966837","url":null,"abstract":"Greater amalgamation of transceiver functionality is a way of addressing the commercial viability of forthcoming architectures. Multilayer Cofired Ceramics (e.g. LTCC/HTCC) is seen, as a potential integration platform offering size, cost and performance advantages. Monolithic integration of passive components, such as directional couplers, in Multilayer Integrated Circuit technologies is highly desirable. Microstrip broadside-coupled structures are well suited for tight coupling in a multilayer high integration environment. However, it is well known that such hybrids suffer from poor directivity due to the inhomogeneous nature of the substrate. Numerous compensation techniques have been proposed in the literature, which attempt to equalize the normal mode phase velocities. In this paper we address the equalization of couplers where the even mode phase velocity is greater than the odd mode, a case typically encountered in broadside-coupled microstrip structures. Simulation and measurement results of practical structures on LTCC technology show that the technique is well suited for multilayer design.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"17 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":"132562000","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: 32
A K-band subharmonic down-converter in a GaAs metamorphic HEMT process GaAs变质HEMT过程中的k波段次谐波下变频器
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.967141
B. Matinpour, N. Lal, J. Laskar, R. Leoni, C. Whelan
{"title":"A K-band subharmonic down-converter in a GaAs metamorphic HEMT process","authors":"B. Matinpour, N. Lal, J. Laskar, R. Leoni, C. Whelan","doi":"10.1109/MWSYM.2001.967141","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.967141","url":null,"abstract":"In this paper, we present the first implementation of a K-band subharmonic down-converter fabricated in a 0.18-/spl mu/m GaAs Metamorphic High Electron Mobility Transistor (MHEMT) process. The low noise and high gain characteristics of the MHEMTs at K-band allow for the integration of a single-stage amplifier with a subharmonic mixer resulting in low-power broadband performance. The subharmonic mixer exhibits conversion loss of 13 dB and IIP3 of +8 dBm from 23 to 30 GHz. With the addition of the amplifier, the down-converter exhibits a conversion loss of 3 dB, noise figure of 5 dB, and IIP3 of -5 dBm from 26 to 30 GHz. The single-stage amplifier exhibits InP-like performance with gain of 11 dB, NF of 1.5 dB, and dc power consumption of 15 mW.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"24 3 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":"132761294","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
A 1-10 GHz 0.18/spl mu/m-CMOS chipset for multi-mode wireless applications 用于多模无线应用的1-10 GHz 0.18/spl mu/m-CMOS芯片组
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.967271
M. Madihian, H. Fujii, H. Yoshida, H. Suzuki, T. Tamazaki
{"title":"A 1-10 GHz 0.18/spl mu/m-CMOS chipset for multi-mode wireless applications","authors":"M. Madihian, H. Fujii, H. Yoshida, H. Suzuki, T. Tamazaki","doi":"10.1109/MWSYM.2001.967271","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.967271","url":null,"abstract":"Performance results for a 1-10 GHz chipset developed in a low-cost two-metal 0.18 /spl mu/m-CMOS technology are described. The developed chips include RF and IF amplifiers, down- and up-mixers, VCO, and receiver/transmitter circuits. Each chip's circuit parameters as well as transistors gate widths are optimized for maximum frequency of operation. The receiver and transmitter chips have a conversion gain higher than 25 dB over 2.4-5.8 GHz, and higher than 16 dB for any other frequency within 1-10 GHz.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"28 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":"132816334","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
A novel low-loss slow-wave CPW periodic structure for filter applications 一种新型低损耗慢波CPW周期滤波器结构
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.966894
J. Sor, Y. Qian, T. Itoh
{"title":"A novel low-loss slow-wave CPW periodic structure for filter applications","authors":"J. Sor, Y. Qian, T. Itoh","doi":"10.1109/MWSYM.2001.966894","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.966894","url":null,"abstract":"A novel periodic slow-wave structure for CPW is presented. This proposed structure exhibits low insertion loss in the passband, simple fabrication, and is intrinsically matched. The structure is applied to realize a miniature lowpass filter one-tenth the size of conventional filters, with spurious-free response and deep attenuation levels using only three cells.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"38 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":"133233772","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: 31
A Zeeman-Stark/Markov model approach to study the EM-RF exposure of a potassium channel 用Zeeman-Stark/Markov模型研究钾离子通道的电磁射频暴露
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.966864
S. Bruna, M. Liberti, S. Giordano, E. Moggia, B. Bianco, G. D'Inzeo
{"title":"A Zeeman-Stark/Markov model approach to study the EM-RF exposure of a potassium channel","authors":"S. Bruna, M. Liberti, S. Giordano, E. Moggia, B. Bianco, G. D'Inzeo","doi":"10.1109/MWSYM.2001.966864","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.966864","url":null,"abstract":"The extraordinary increase in the use of electromagnetic (EM) radiofrequency (RF) radiation has stimulated new researches concentrated on the study of the early steps of the EM interaction mechanisms. As most of the effects due to the exogenous exposure of biosystem has been associated with the cell membrane, these researches are mainly oriented toward the study of the molecular aspects of the interaction. Here, the authors introduce an integrated methodology of analysis, which involves cascading steps such as quantum modelling of the system constituted by a ligand ion (Ca/sup 2+/) and a protein receptor (Calmodulin) of the cell membrane and analysis of the protein channel activity by means of a stochastic model of the channel.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"34 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":"133485287","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
Low-cost dual-mode asymmetric filters in rectangular waveguide 矩形波导中的低成本双模非对称滤波器
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.967253
M. Guglielmi, O. Roquebrun, P. Jarry, E. Kerhervé, M. Capurso, M. Piloni
{"title":"Low-cost dual-mode asymmetric filters in rectangular waveguide","authors":"M. Guglielmi, O. Roquebrun, P. Jarry, E. Kerhervé, M. Capurso, M. Piloni","doi":"10.1109/MWSYM.2001.967253","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.967253","url":null,"abstract":"Dual-mode microwave filters are extensively used in modern communication equipment because they can implement sophisticated and selective filter transfer functions. Their most common implementation is based on circular-waveguide technology and generally requires a rather complex development procedure. In this paper we describe a new implementation of dual-mode filters in standard rectangular waveguide that can be used to produce asymmetric transfer functions. The proposed filter structure can be analyzed and optimized very efficiently using multimode equivalent network representations thus leading to a simple and rapid development procedure. In addition to theory, the measured performance of several filter structures are also presented thereby fully validating the proposed filter concept.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"113 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":"133935843","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
A V-Band MMIC SPDT passive HEMT switch using impedance transformation networks 一种使用阻抗变换网络的v波段MMIC SPDT无源HEMT开关
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.966882
Yu-Jiu Wang, Kun-You Lin, D. Niu, Huei Wang
{"title":"A V-Band MMIC SPDT passive HEMT switch using impedance transformation networks","authors":"Yu-Jiu Wang, Kun-You Lin, D. Niu, Huei Wang","doi":"10.1109/MWSYM.2001.966882","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.966882","url":null,"abstract":"A V-Band MMIC single pole double throw (SPDT) switch using GaAs PHEMT process is designed, fabricated and tested. In contrast to the conventional resonant-type switch design method, this passive FET switch circuit utilizes impedance transformation to compensate the drain-source capacitance effect for the off-state in millimeter-wave frequency range. This SPDT switch has a measured isolation better than 30 dB for the off-state and 4 dB insertion loss for the on-state from 53 GHz to 61 GHz. The isolation performance of this design approach outmatches previously published FET switches in this frequency range.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"123 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":"131766586","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
Design of an image-type dielectric resonator to measure surface resistance of a high-T/sub c/ superconductor film 一种测量高t /sub /超导薄膜表面电阻的成像型介电谐振器的设计
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.966939
Y. Kobayashi, T. Hashimoto
{"title":"Design of an image-type dielectric resonator to measure surface resistance of a high-T/sub c/ superconductor film","authors":"Y. Kobayashi, T. Hashimoto","doi":"10.1109/MWSYM.2001.966939","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.966939","url":null,"abstract":"A new measurement method using two resonant modes, the TE/sub 021/ and TE/sub 012/ modes, in an image-type dielectric resonator is proposed to measure the surface resistance R/sub s/ of a high-T/sub c/ superconductor (HTS) film and the loss tangent tan/spl delta/ of a sapphire rod separately, precisely and nondestructively. A sapphire resonator is set in a cavity constructed from two HTS films and a copper cylinder. This resonator structure is designed from the mode charts calculated on the basis of the rigorous analysis by the mode matching method. It is verified that the mode chart also is effective to identify many resonant modes observed in measurement. The temperature dependence of R/sub s/ of a YBCO film was measured at 20 GHz by this method. The measured result agrees very well with one by the conventional two-resonator method.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"265 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":"132350835","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
Tunable RF filters using thin film barium strontium titanate based capacitors 使用薄膜钛酸钡锶电容器的可调谐射频滤波器
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157) Pub Date : 2001-05-20 DOI: 10.1109/MWSYM.2001.967176
A. Tombak, F. Ayguavives, Jon-Paul Maria, G. Stauf, A. Kingon, Amir Mortazawi
{"title":"Tunable RF filters using thin film barium strontium titanate based capacitors","authors":"A. Tombak, F. Ayguavives, Jon-Paul Maria, G. Stauf, A. Kingon, Amir Mortazawi","doi":"10.1109/MWSYM.2001.967176","DOIUrl":"https://doi.org/10.1109/MWSYM.2001.967176","url":null,"abstract":"Tunable lowpass and bandpass filters based on barium strontium titanate (BST) capacitors are reported. For the lowpass filter, 40% tunability was achieved at 9 V. Intermodulation distortion generated by the lowpass filters was also measured and predicted using a nonlinear model for the BST capacitors. The bandpass filter showed 45% tunability with an applied DC bias of 10 V.","PeriodicalId":250660,"journal":{"name":"2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157)","volume":"40 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":"133171780","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: 39
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