Pub Date : 1996-10-01DOI: 10.1109/EUMA.1996.337543
La Trinogga, A. J. Fox
Some practical results are presented concerning the frequency tuning of a dielectric resonator (DR). The method presented here distinguishes itself from other known tuning methods in that the tuning mechanism is invasive, that is inside the dielectric resonators which make up the filter.
{"title":"Invasive varactor tuning of dielectric resonator filters","authors":"La Trinogga, A. J. Fox","doi":"10.1109/EUMA.1996.337543","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337543","url":null,"abstract":"Some practical results are presented concerning the frequency tuning of a dielectric resonator (DR). The method presented here distinguishes itself from other known tuning methods in that the tuning mechanism is invasive, that is inside the dielectric resonators which make up the filter.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115486665","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 : 1996-10-01DOI: 10.1109/EUMA.1996.337713
T. Kitazawa, T. Sugano
The nonreciprocal characteristics of the bound and leaky modes are presented for coplanar waveguide with the magnetized ferrite. The effects of the finite metallization thickness on these modes are taken into consideration. Numerical results include the nonreciprocal properties of the characteristic impedances and the losses due to the imperfect conductors.
{"title":"Nonreciprocal characteristics of bound and leaky modes of coplanar waveguide with magnetized ferrite","authors":"T. Kitazawa, T. Sugano","doi":"10.1109/EUMA.1996.337713","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337713","url":null,"abstract":"The nonreciprocal characteristics of the bound and leaky modes are presented for coplanar waveguide with the magnetized ferrite. The effects of the finite metallization thickness on these modes are taken into consideration. Numerical results include the nonreciprocal properties of the characteristic impedances and the losses due to the imperfect conductors.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"272 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115790649","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 : 1996-10-01DOI: 10.1109/EUMA.1996.337558
J. Encinar
A new stacked microstrip reflectarray based on patches of variable size has been proposed for dual frequency operation. A progressive phase distribution is achieved at both frequencies by adjusting the length of the patches in each elementary cell of the reflectarray. The phase of the reflection coefficient in each cell is computed by a full-wave method, assuming periodicity. A numerical optimization is used to find the dimensions of the patches that provides the appropriate phase distribution
{"title":"Analysis and design of dual frequency reflectarrays using microstrip stacked patches of variable size","authors":"J. Encinar","doi":"10.1109/EUMA.1996.337558","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337558","url":null,"abstract":"A new stacked microstrip reflectarray based on patches of variable size has been proposed for dual frequency operation. A progressive phase distribution is achieved at both frequencies by adjusting the length of the patches in each elementary cell of the reflectarray. The phase of the reflection coefficient in each cell is computed by a full-wave method, assuming periodicity. A numerical optimization is used to find the dimensions of the patches that provides the appropriate phase distribution","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124348919","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 : 1996-10-01DOI: 10.1109/EUMA.1996.337664
F. Vallette, G. Vasilescu, G. Alquié
Sensitivities computation is an essential step in microwave circuit design, but the study of the first-order sensitivities may be not enough to predict the evolution of the performances with respect to parameters' variations. The purpose of this contribution is to put in evidence that the evolution of higher-order sensitivities is of great importance.
{"title":"Some results obtained in sensitivity analysis of microwave circuits","authors":"F. Vallette, G. Vasilescu, G. Alquié","doi":"10.1109/EUMA.1996.337664","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337664","url":null,"abstract":"Sensitivities computation is an essential step in microwave circuit design, but the study of the first-order sensitivities may be not enough to predict the evolution of the performances with respect to parameters' variations. The purpose of this contribution is to put in evidence that the evolution of higher-order sensitivities is of great importance.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115095670","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 : 1996-10-01DOI: 10.1109/EUMA.1996.337620
D. Faggetter, Y. Chow
A moment method for analysis of a dielectric resonator is presented requiring surface current of only one type (i.e. electric). Without the usual volumetric currents of both electric and magnetic types, the analysis has the advantage of a smaller matrix size without any compromise on accuracy. The technique is versatile in that it can be applied to a dielectric of any shape.
{"title":"Response of a dielectric resonator from only electric currents on its surface","authors":"D. Faggetter, Y. Chow","doi":"10.1109/EUMA.1996.337620","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337620","url":null,"abstract":"A moment method for analysis of a dielectric resonator is presented requiring surface current of only one type (i.e. electric). Without the usual volumetric currents of both electric and magnetic types, the analysis has the advantage of a smaller matrix size without any compromise on accuracy. The technique is versatile in that it can be applied to a dielectric of any shape.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116012969","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 : 1996-10-01DOI: 10.1109/EUMA.1996.337651
J. Gerdes, F. Schmuckle, C. Rheinfelder, W. Heinrich
Efficient models for coplanar waveguide (CPW) discontinuities and junctions on Si substrate have been developed, which are suitable for W-band MMIC design. The models consist of line sections and lumped-element equivalent circuits and were derived by analytical extraction from Finite-Difference frequency domain calculations. They are validated by on-wafer measurements up to 90 GHz using test structures fabricated on silicon substrate.
{"title":"Modelling of coplanar waveguide elements for 77-GHz - MMICs","authors":"J. Gerdes, F. Schmuckle, C. Rheinfelder, W. Heinrich","doi":"10.1109/EUMA.1996.337651","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337651","url":null,"abstract":"Efficient models for coplanar waveguide (CPW) discontinuities and junctions on Si substrate have been developed, which are suitable for W-band MMIC design. The models consist of line sections and lumped-element equivalent circuits and were derived by analytical extraction from Finite-Difference frequency domain calculations. They are validated by on-wafer measurements up to 90 GHz using test structures fabricated on silicon substrate.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121952259","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 : 1996-10-01DOI: 10.1109/EUMA.1996.337595
M. Curow, D. Liebig, K. Schunemann
This contribution presents a comparison of different carrier transport models for design and optimization of GaAs IMPATT diodes for W- and D-band applications. The drift-diffusion equations, an hydrodynamic transport model, a Monte-Carlo simulator and a Cellular-Automata code are considered. It is shown that the drift-diffusion equations cannot predict realistic output powers and dynamic impedances if doping profiles of the Read-type are examined. Secondly, the hydrodynamic transport model can closely reproduce the results of particle simulators if additional, slightly modified energy balance equations are solved in order to determine the ionization rates which higher accuracy compared to the standard model.
{"title":"Comparison of different carrier transport models for simulations of W-and D-band GaAs IMPATT diodes","authors":"M. Curow, D. Liebig, K. Schunemann","doi":"10.1109/EUMA.1996.337595","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337595","url":null,"abstract":"This contribution presents a comparison of different carrier transport models for design and optimization of GaAs IMPATT diodes for W- and D-band applications. The drift-diffusion equations, an hydrodynamic transport model, a Monte-Carlo simulator and a Cellular-Automata code are considered. It is shown that the drift-diffusion equations cannot predict realistic output powers and dynamic impedances if doping profiles of the Read-type are examined. Secondly, the hydrodynamic transport model can closely reproduce the results of particle simulators if additional, slightly modified energy balance equations are solved in order to determine the ionization rates which higher accuracy compared to the standard model.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129664769","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 : 1996-10-01DOI: 10.1109/EUMA.1996.337721
J. Belquin, F. Danneville, A. Cappy, G. Dambrine
We present a new model to determine the noise performances of HEMTs in the millimeter wave range from characterizations below 40 GHz. This work describes an extrinsic noise model based on two equivalent noise temperatures (Tin and Tout) both independent from frequency and gate width. This extrinsic noise model is well suited for right first time mm-wave circuit design. The main reason is that only two parasitic (Lg and Cpg) have to be accurately determined. Then the determination of the equivalent temperatures Tin and Tout is less sensitive to measurements uncertainties and parasitic extraction than conventional two temperatures intrinsic noise model.
{"title":"HEMTs extrinsic noise model for millimeter waves integrated circuits design","authors":"J. Belquin, F. Danneville, A. Cappy, G. Dambrine","doi":"10.1109/EUMA.1996.337721","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337721","url":null,"abstract":"We present a new model to determine the noise performances of HEMTs in the millimeter wave range from characterizations below 40 GHz. This work describes an extrinsic noise model based on two equivalent noise temperatures (Tin and Tout) both independent from frequency and gate width. This extrinsic noise model is well suited for right first time mm-wave circuit design. The main reason is that only two parasitic (Lg and Cpg) have to be accurately determined. Then the determination of the equivalent temperatures Tin and Tout is less sensitive to measurements uncertainties and parasitic extraction than conventional two temperatures intrinsic noise model.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130046144","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 : 1996-10-01DOI: 10.1109/EUMA.1996.337711
A. Abramowicz, M. Celuch-Marcysiak, M. Ebert
The paper discusses the major drawbacks of the matrix analysis of coupled transmission lines which results from the inconsistent circuit model of coupled lines. The key point where the wrong assumption has been made is stated. The method to improve the matrix analysis is given and the method how to correctly analyze coupled lines is presented.
{"title":"The weakness of the matrix analysis of coupled transmission lines","authors":"A. Abramowicz, M. Celuch-Marcysiak, M. Ebert","doi":"10.1109/EUMA.1996.337711","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337711","url":null,"abstract":"The paper discusses the major drawbacks of the matrix analysis of coupled transmission lines which results from the inconsistent circuit model of coupled lines. The key point where the wrong assumption has been made is stated. The method to improve the matrix analysis is given and the method how to correctly analyze coupled lines is presented.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"31 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131084924","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 : 1996-10-01DOI: 10.1109/EUMA.1996.337731
M. Madihian, L. Desclos, K. Maruhashi, K. Onda, M. Kuzuhara
This paper concerns with the design consideration, fabrication process, and performance of a CPW monolithic AlGaAs/InGaAs HJFET switch for V-band wireless networks applications. The Switch utilizes a resonance concept in order to either pass, or to block a signal by presenting, respectively, a parallel, or a series resonant circuit to the signal. A developed T/R switch exhibits state-of the art switching-speed and isolation of 250psec and 41dB, respectively, and an insertion loss of 3.9dB ovr V-band frequencies.
{"title":"A high-speed resonance-type FET transceiver switch for millimeter-wave band wireless network","authors":"M. Madihian, L. Desclos, K. Maruhashi, K. Onda, M. Kuzuhara","doi":"10.1109/EUMA.1996.337731","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337731","url":null,"abstract":"This paper concerns with the design consideration, fabrication process, and performance of a CPW monolithic AlGaAs/InGaAs HJFET switch for V-band wireless networks applications. The Switch utilizes a resonance concept in order to either pass, or to block a signal by presenting, respectively, a parallel, or a series resonant circuit to the signal. A developed T/R switch exhibits state-of the art switching-speed and isolation of 250psec and 41dB, respectively, and an insertion loss of 3.9dB ovr V-band frequencies.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126949291","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：