Pub Date : 2000-06-11DOI: 10.1109/MWSYM.2000.862341
J. Pedro, N. Carvalho
This paper validates the idea that no matter the notch width, a conventional NPR test produces optimistic in-band distortion measurements, when compared with a hypothetical continuous spectrum excitation test. It also proposes a setup able to perform these corrected measurements, which became the unique way of co-channel distortion evaluation of systems with memory or driven into saturation.
{"title":"A novel set-up for co-channel distortion ratio evaluation","authors":"J. Pedro, N. Carvalho","doi":"10.1109/MWSYM.2000.862341","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.862341","url":null,"abstract":"This paper validates the idea that no matter the notch width, a conventional NPR test produces optimistic in-band distortion measurements, when compared with a hypothetical continuous spectrum excitation test. It also proposes a setup able to perform these corrected measurements, which became the unique way of co-channel distortion evaluation of systems with memory or driven into saturation.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117108778","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}
Pub Date : 2000-06-11DOI: 10.1109/MWSYM.2000.861751
M. Bailey, Panu Hagstrom
Multi-mode and multi-band communication networks have emerged as a step towards true 3/sup rd/ Generation (3G) networks. In this paper, novel integrated RF front-ends for multi-mode/band handsets are described. The advantages of an integrated front-end are demonstrated by measurement results of a prototype EGSM/PCS front-end module. It is shown that this integrated RF module offers a substantial improvement in the present state of handset design.
{"title":"An integrated RF front-end for multi-mode handsets","authors":"M. Bailey, Panu Hagstrom","doi":"10.1109/MWSYM.2000.861751","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.861751","url":null,"abstract":"Multi-mode and multi-band communication networks have emerged as a step towards true 3/sup rd/ Generation (3G) networks. In this paper, novel integrated RF front-ends for multi-mode/band handsets are described. The advantages of an integrated front-end are demonstrated by measurement results of a prototype EGSM/PCS front-end module. It is shown that this integrated RF module offers a substantial improvement in the present state of handset design.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116244528","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}
Pub Date : 2000-06-11DOI: 10.1109/MWSYM.2000.863581
J. Qian, G. Li, F. de Flavis
This paper is focused on the creation of an efficient electromagnetic model of MEMS switches which operates at microwave frequencies. The switches are first characterized using a full wave analysis based on finite element method aiming to extract the S-parameters of the switches for different geometrical dimensions. From the S-parameter data base, a scalable lumped circuit model is extracted to allow easy implementation of the switch model into available microwave CAD software. The simulated results are compared with published measured data as validation of our model.
{"title":"A parametric model of MEMS capacitive switch operating at microwave frequencies","authors":"J. Qian, G. Li, F. de Flavis","doi":"10.1109/MWSYM.2000.863581","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.863581","url":null,"abstract":"This paper is focused on the creation of an efficient electromagnetic model of MEMS switches which operates at microwave frequencies. The switches are first characterized using a full wave analysis based on finite element method aiming to extract the S-parameters of the switches for different geometrical dimensions. From the S-parameter data base, a scalable lumped circuit model is extracted to allow easy implementation of the switch model into available microwave CAD software. The simulated results are compared with published measured data as validation of our model.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124031903","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}
Pub Date : 2000-06-11DOI: 10.1109/MWSYM.2000.862265
R. Hwang, S. Peng, C.C. Chen
Periodic structures of the resonance type are investigated with a focus on the utilization of structure dispersion to achieve a wide-band operation for the surface-wave suppression. Both approximate and exact formulations are presented to illustrate wave processes involved in the resonant structure and to develop useful criteria for design purpose.
{"title":"Surface-wave suppression of resonance-type periodic structures","authors":"R. Hwang, S. Peng, C.C. Chen","doi":"10.1109/MWSYM.2000.862265","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.862265","url":null,"abstract":"Periodic structures of the resonance type are investigated with a focus on the utilization of structure dispersion to achieve a wide-band operation for the surface-wave suppression. Both approximate and exact formulations are presented to illustrate wave processes involved in the resonant structure and to develop useful criteria for design purpose.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125818006","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}
Pub Date : 2000-06-11DOI: 10.1109/MWSYM.2000.860966
N. Bushyager, M. Tentzeris
The Haar-based MRTD algorithm is extended to 2.5D and is applied to the characterization of micromachined transmission lines. Simulation results of /spl epsiv//sub eff/ for Si-micromachined finite-ground coplanar waveguides (FG-CPW) as a function of the undercut and for frequencies between 10 GHz and 60 GHz are compared to those obtained by use of conventional FDTD to indicate considerable savings in memory and computational time and demonstrate the adaptive modeling of multidielectric cells.
{"title":"Characterization of micromachined transmission lines using MRTD (multiresolution time domain technique)","authors":"N. Bushyager, M. Tentzeris","doi":"10.1109/MWSYM.2000.860966","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.860966","url":null,"abstract":"The Haar-based MRTD algorithm is extended to 2.5D and is applied to the characterization of micromachined transmission lines. Simulation results of /spl epsiv//sub eff/ for Si-micromachined finite-ground coplanar waveguides (FG-CPW) as a function of the undercut and for frequencies between 10 GHz and 60 GHz are compared to those obtained by use of conventional FDTD to indicate considerable savings in memory and computational time and demonstrate the adaptive modeling of multidielectric cells.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124737771","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}
Pub Date : 2000-06-11DOI: 10.1109/MWSYM.2000.862321
W. Hauth, D. Schmitt, M. Guglielmi
This paper presents the application of rigorous field theory modelling for the accurate design of narrow-band waveguide channel filters. A description is given of the problems associated with narrow-band modelling, their solution, and results obtained from test filter hardware. The precision of this approach will lead to a significant reduction of development and tuning costs, especially with high-performance multiplexers for satellite communications.
{"title":"Accurate modelling of narrow-band filters for satellite communications","authors":"W. Hauth, D. Schmitt, M. Guglielmi","doi":"10.1109/MWSYM.2000.862321","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.862321","url":null,"abstract":"This paper presents the application of rigorous field theory modelling for the accurate design of narrow-band waveguide channel filters. A description is given of the problems associated with narrow-band modelling, their solution, and results obtained from test filter hardware. The precision of this approach will lead to a significant reduction of development and tuning costs, especially with high-performance multiplexers for satellite communications.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129700318","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}
Pub Date : 2000-06-11DOI: 10.1109/MWSYM.2000.862235
S. Bousnina, P. Mandeville, A. Kouki, R. Surridge, F. Ghannouchi
An original, rigorous and accurate method for the direct extraction of HBT small-signal model parameters is proposed. The main advantage of this method is that a unique and physical-meaningful set of intrinsic parameters is extracted from the measured S-parameters for the whole frequency range of operation. The extraction procedure uses a set of closed form expressions derived without any approximation. In this sense, the extraction method is more accurate and robust in comparison with those employing special test structures or global numerical optimization techniques. Experimental validation on a HBT device with a 2/spl times/25 /spl mu/m emitter was carried out, and excellent results were obtained up to 30 GHz. The calculated data-fitting residual error over 1-30 GHz was less then 2%.
{"title":"A new analytical and broadband method for determining the HBT small-signal model parameters","authors":"S. Bousnina, P. Mandeville, A. Kouki, R. Surridge, F. Ghannouchi","doi":"10.1109/MWSYM.2000.862235","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.862235","url":null,"abstract":"An original, rigorous and accurate method for the direct extraction of HBT small-signal model parameters is proposed. The main advantage of this method is that a unique and physical-meaningful set of intrinsic parameters is extracted from the measured S-parameters for the whole frequency range of operation. The extraction procedure uses a set of closed form expressions derived without any approximation. In this sense, the extraction method is more accurate and robust in comparison with those employing special test structures or global numerical optimization techniques. Experimental validation on a HBT device with a 2/spl times/25 /spl mu/m emitter was carried out, and excellent results were obtained up to 30 GHz. The calculated data-fitting residual error over 1-30 GHz was less then 2%.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128493458","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}
Pub Date : 2000-06-11DOI: 10.1109/MWSYM.2000.863280
B. Kopp
This paper will discuss pertinent issues and trends in X-band transmit/receive (T/R) modules. The performance of gallium arsenide (GaAs) T/R module components and wide bandgap semiconductors will be presented along with future challenges. T/R module cost will also be addressed with an emphasis on semiconductor cost factors and issues. Finally, a brief discussion of packaging and assembly issues will be provided.
{"title":"X-band transmit/receive module overview","authors":"B. Kopp","doi":"10.1109/MWSYM.2000.863280","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.863280","url":null,"abstract":"This paper will discuss pertinent issues and trends in X-band transmit/receive (T/R) modules. The performance of gallium arsenide (GaAs) T/R module components and wide bandgap semiconductors will be presented along with future challenges. T/R module cost will also be addressed with an emphasis on semiconductor cost factors and issues. Finally, a brief discussion of packaging and assembly issues will be provided.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128753802","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}
Pub Date : 2000-06-11DOI: 10.1109/MWSYM.2000.863530
P. Bernardi, M. Cavagnaro, S. Pisa, E. Piuzzi
The power deposition inside the head, due to phones equipped with helical antennas, has been computed developing an FDTD code with a graded mesh. Both radiating properties of the phone (radiation impedance, radiation pattern, etc) and power absorption in an anatomical model of the human head have been evaluated for three different types of cellular phones.
{"title":"Evaluation of the power absorbed in a human head model exposed to cellular phones equipped with helical antennas","authors":"P. Bernardi, M. Cavagnaro, S. Pisa, E. Piuzzi","doi":"10.1109/MWSYM.2000.863530","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.863530","url":null,"abstract":"The power deposition inside the head, due to phones equipped with helical antennas, has been computed developing an FDTD code with a graded mesh. Both radiating properties of the phone (radiation impedance, radiation pattern, etc) and power absorption in an anatomical model of the human head have been evaluated for three different types of cellular phones.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128289896","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}
Pub Date : 2000-06-11DOI: 10.1109/MWSYM.2000.862242
M. Kossel, H. Benedickter, R. Peter, W. Bachtold
Backscatter modulation is frequently used in microwave tagging or sensor systems for interrogating remote devices. This paper describes, in the first part as an overview, three commonly used interrogator setups for backscatter modulation systems. In the second part, a novel interrogator topology is presented which is part of an active read/write microwave tagging system. A combination of backscatter modulation with frequency hopping methods is applied in the presented tagging system in order to cope with multiple reader multiple tag environments. Measured results of an experimental tagging system setup operating in the 2.4-GHz ISM band are presented which show the performance of the proposed interrogator.
{"title":"Microwave backscatter modulation systems","authors":"M. Kossel, H. Benedickter, R. Peter, W. Bachtold","doi":"10.1109/MWSYM.2000.862242","DOIUrl":"https://doi.org/10.1109/MWSYM.2000.862242","url":null,"abstract":"Backscatter modulation is frequently used in microwave tagging or sensor systems for interrogating remote devices. This paper describes, in the first part as an overview, three commonly used interrogator setups for backscatter modulation systems. In the second part, a novel interrogator topology is presented which is part of an active read/write microwave tagging system. A combination of backscatter modulation with frequency hopping methods is applied in the presented tagging system in order to cope with multiple reader multiple tag environments. Measured results of an experimental tagging system setup operating in the 2.4-GHz ISM band are presented which show the performance of the proposed interrogator.","PeriodicalId":149404,"journal":{"name":"2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129542671","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}
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