Pub Date : 1996-10-01DOI: 10.1109/EUMA.1996.337582
H. Kawakami, Y. Iitsuka, S. Kogiso, S. Kon, G. Sato
{"title":"Design of variable phase bifilar helical antenna for mobile communication","authors":"H. Kawakami, Y. Iitsuka, S. Kogiso, S. Kon, G. Sato","doi":"10.1109/EUMA.1996.337582","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337582","url":null,"abstract":"","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"14 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":"128099603","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.1996.337735
T. Ohira, I. Toyoda, H. Ogawa
A novel circuit design approach is presented for hyper scale monolithic microwave integration. The key point is the microwave unit cells which provide power division, and amplitude and phase control. These cells feature iteratively matched complex impedance and interlocked dual and quadruple cold FET circuit topologies resulting very high integration density as well as almost zero dc-power dissipation. Based on the novel design concept, an entire beam forming network for exciting a 64-element phased aray is successfully integrated on a single GaAs monolithic chip. It consists of a 64-way pyramidal power divider, 64 360-degree variable phase shifters, and 64 phase-inversible amplitude controllers. This hyper-scale MMIC will drastically advance the development of multiple beam forming and adaptive steering systems for satellite onboard phased array transponders.
{"title":"Single chip variable beam forming network for 64-element array radiators : hyper scale monolithic microwave integration","authors":"T. Ohira, I. Toyoda, H. Ogawa","doi":"10.1109/EUMA.1996.337735","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337735","url":null,"abstract":"A novel circuit design approach is presented for hyper scale monolithic microwave integration. The key point is the microwave unit cells which provide power division, and amplitude and phase control. These cells feature iteratively matched complex impedance and interlocked dual and quadruple cold FET circuit topologies resulting very high integration density as well as almost zero dc-power dissipation. Based on the novel design concept, an entire beam forming network for exciting a 64-element phased aray is successfully integrated on a single GaAs monolithic chip. It consists of a 64-way pyramidal power divider, 64 360-degree variable phase shifters, and 64 phase-inversible amplitude controllers. This hyper-scale MMIC will drastically advance the development of multiple beam forming and adaptive steering systems for satellite onboard phased array transponders.","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":"128235613","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.1996.337545
R. Gillon, J. Raskin, D. Vanhoenacker, J. Colinge
This paper presents an efficient reference impedance determination method, which is applicable to TLR calibrations performed on a wide variety of substrates, including those consisting of low resistivity material. The method is shown to be valid up to 40 GHz. It is based on the comparison of DC-resistance and scattering-parameter measurements of a resistor, a short and an open.
{"title":"Determining the reference impedance of on-wafer TLR calibrations on tossy substrates","authors":"R. Gillon, J. Raskin, D. Vanhoenacker, J. Colinge","doi":"10.1109/EUMA.1996.337545","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337545","url":null,"abstract":"This paper presents an efficient reference impedance determination method, which is applicable to TLR calibrations performed on a wide variety of substrates, including those consisting of low resistivity material. The method is shown to be valid up to 40 GHz. It is based on the comparison of DC-resistance and scattering-parameter measurements of a resistor, a short and an open.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"34 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":"133332942","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.1996.337530
N. Fel, C. Guimard, M. Et, E. Dupont-Nivet
A monolithic very broad-band phase shifter has been designed and fabricated with a 0.2 micron HEMT technology. The architecture of this phase shifter is based on vector modulation. Measurements demonstrate the ability to shift the phase of the incoming signal from 0 to 360° at frequencies ranging from 100 MHz to 2 GHz.
{"title":"A very broad-band analog phase shifter covering four frequency octaves","authors":"N. Fel, C. Guimard, M. Et, E. Dupont-Nivet","doi":"10.1109/EUMA.1996.337530","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337530","url":null,"abstract":"A monolithic very broad-band phase shifter has been designed and fabricated with a 0.2 micron HEMT technology. The architecture of this phase shifter is based on vector modulation. Measurements demonstrate the ability to shift the phase of the incoming signal from 0 to 360° at frequencies ranging from 100 MHz to 2 GHz.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"47 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":"127683996","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.1996.337626
Xidong Wu, T. van Deventer
Digital and microwave IC's provide a high level of integration through multilayered technology which may introduce parasitic effects such as crosstalk and resonances. A finite-difference time-domain (FDTD) technique is applied to analyze crosstalk in vertical transitions such as buried and through vias. Their parasitic contribution at high frequencies is studied here.
{"title":"Analysis of crosstalk in vertical interconnects","authors":"Xidong Wu, T. van Deventer","doi":"10.1109/EUMA.1996.337626","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337626","url":null,"abstract":"Digital and microwave IC's provide a high level of integration through multilayered technology which may introduce parasitic effects such as crosstalk and resonances. A finite-difference time-domain (FDTD) technique is applied to analyze crosstalk in vertical transitions such as buried and through vias. Their parasitic contribution at high frequencies is studied here.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"3 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":"128537734","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.1996.337643
G. Vecchi, P. Pirinoli, L. Matekovits, M. Sereno-Garino, M. Orefice
In this paper techniques are presented, that permit an efficient full-wave analysis of printed structures with metalization of arbitrary shape, based on the electric field integral equation (EFIE) formulation and discretization by application of Method of Moments (MoM). For the analysis of a single element, the leading, frequency independent singular terms of the Green function are extracted and the part of impedance matrix associated to them is evaluated in space domain. The eigenfunctions of these terms are then used for expanding the regular part; they are entire-domain functions, defined for an arbitrary geometry, and incorporate the correct edge behavior: therefore only a reduced number of them is necessary to well represent the solution. For the application to arrays, the effort needed for the evaluation of the coupling integrals between two arbitrary functions on separated domains is reduced via a spectral domain formulation, with numerical integration along a path of rapid convergence. Application examples and validations are presented.
{"title":"Combined spatial and spectral techniques for the analysis of microstrip antennas","authors":"G. Vecchi, P. Pirinoli, L. Matekovits, M. Sereno-Garino, M. Orefice","doi":"10.1109/EUMA.1996.337643","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337643","url":null,"abstract":"In this paper techniques are presented, that permit an efficient full-wave analysis of printed structures with metalization of arbitrary shape, based on the electric field integral equation (EFIE) formulation and discretization by application of Method of Moments (MoM). For the analysis of a single element, the leading, frequency independent singular terms of the Green function are extracted and the part of impedance matrix associated to them is evaluated in space domain. The eigenfunctions of these terms are then used for expanding the regular part; they are entire-domain functions, defined for an arbitrary geometry, and incorporate the correct edge behavior: therefore only a reduced number of them is necessary to well represent the solution. For the application to arrays, the effort needed for the evaluation of the coupling integrals between two arbitrary functions on separated domains is reduced via a spectral domain formulation, with numerical integration along a path of rapid convergence. Application examples and validations are presented.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"16 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":"128789223","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.1996.337658
A. R. Perkons, T. Itoh
This paper presents a microstrip fed Yagi-Uda slot array antenna as a new method of surface wave excitation in a dielectric slab. Construction of the antenna is compatible with planar fabrication technology. Measurements of input return loss, front-to-back ratio, and surface wave power distribution are presented.
{"title":"Surface wave excitation of a dieletric slab by a Yagi-Uda slot array antenna","authors":"A. R. Perkons, T. Itoh","doi":"10.1109/EUMA.1996.337658","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337658","url":null,"abstract":"This paper presents a microstrip fed Yagi-Uda slot array antenna as a new method of surface wave excitation in a dielectric slab. Construction of the antenna is compatible with planar fabrication technology. Measurements of input return loss, front-to-back ratio, and surface wave power distribution are presented.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"35 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":"115989467","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.1996.337581
L. Nagy, Z. Sandor, Z. Szabó, Tamas Csaba
An error analysis of the COST 231 Walfish-Ikegami model [1] proposed for urban area and the demonstration of a 3 dimensional deterministic wave propagation model are made in this paper. First the sensitivity of the COST 231 model to the uncertainty of the building parameters is analyzed and a modification in the application of the model that reduces the error caused by the irregular building structure is performed. The effect of the building database accuracy is also shown. The need for a more precise propagation model appears, and the first results from a 3D deterministic model based on the Uniform Theory of Diffraction are presented. The validity of the approximation in the calculation of the diffraction coefficients and the effect of the slope diffraction are investigated, and results of measurements of material parameter measurements necessary for the model are presented. The calculations are assessed by measurements at 900 MHz on a suitable part of Budapest.
{"title":"Urban Wave Propagation Models","authors":"L. Nagy, Z. Sandor, Z. Szabó, Tamas Csaba","doi":"10.1109/EUMA.1996.337581","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337581","url":null,"abstract":"An error analysis of the COST 231 Walfish-Ikegami model [1] proposed for urban area and the demonstration of a 3 dimensional deterministic wave propagation model are made in this paper. First the sensitivity of the COST 231 model to the uncertainty of the building parameters is analyzed and a modification in the application of the model that reduces the error caused by the irregular building structure is performed. The effect of the building database accuracy is also shown. The need for a more precise propagation model appears, and the first results from a 3D deterministic model based on the Uniform Theory of Diffraction are presented. The validity of the approximation in the calculation of the diffraction coefficients and the effect of the slope diffraction are investigated, and results of measurements of material parameter measurements necessary for the model are presented. The calculations are assessed by measurements at 900 MHz on a suitable part of Budapest.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"81 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":"125483860","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.1996.337660
V. Bertrand, M. Lalande, B. Jecko
This paper deals with an electromagnetic analysis by FDTD method of exponentially tapered coplanar stripline (ETCS) antennas used for the material characterisation by spectroscopy technique. This analysis leads to the time and harmonic evolution of radiated fled at every point in the space. The effect of substrate thickness on radiation properties of ETCS antennas, radiation patterns are presented. The received signal is calculated and compared to the experimental signal.
{"title":"Electromagnetic analysis of exponentially tapered coplanar stripline antennas used in coherent microwave transient spectroscopy technique","authors":"V. Bertrand, M. Lalande, B. Jecko","doi":"10.1109/EUMA.1996.337660","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337660","url":null,"abstract":"This paper deals with an electromagnetic analysis by FDTD method of exponentially tapered coplanar stripline (ETCS) antennas used for the material characterisation by spectroscopy technique. This analysis leads to the time and harmonic evolution of radiated fled at every point in the space. The effect of substrate thickness on radiation properties of ETCS antennas, radiation patterns are presented. The received signal is calculated and compared to the experimental signal.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"39 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":"125083464","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.1996.337554
S. Chew, T. Itoh
A quasi-optical amplifier using narrow slot antenna is designed with high active device density. The natural coupling of the microstrip and slotline is exploited for power combining/dividing without any appreciable increase in circuit real-estate. Measured EIPG in the transmission mode agrees well with theoretical prediction.
{"title":"High active device density Quasi-Optical amplifier","authors":"S. Chew, T. Itoh","doi":"10.1109/EUMA.1996.337554","DOIUrl":"https://doi.org/10.1109/EUMA.1996.337554","url":null,"abstract":"A quasi-optical amplifier using narrow slot antenna is designed with high active device density. The natural coupling of the microstrip and slotline is exploited for power combining/dividing without any appreciable increase in circuit real-estate. Measured EIPG in the transmission mode agrees well with theoretical prediction.","PeriodicalId":219101,"journal":{"name":"1996 26th European Microwave Conference","volume":"65 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":"121707702","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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