Pub Date : 1994-10-01DOI: 10.1109/EUMA.1994.337353
W. Baumberger
The design, fabrication and prototype evaluation of a single chip transceiver frontend for the 2.44 GHz-frequency band is presented. The chip architecture, circuit design and the measured, results are described. The transmitter section of the IC comprises an interface to CMOS logic, a BPSK modulator providing the high carrier suppression needed for direct spread spectrum modulation, and an RF driver amplifier. The receive section is aconventional downcotiverter with an LNA stage, amixerand a three stage IF preamplifier (frequency range 50 to 500 MHz) with gain control. In addition, the chip includes a local oscillator chain to feed both TX and RX mixers (1.2 GHz oscillator, prescaler for PLL support and frequency doubler). Chip size. and power consumption is 3 mm2 and 400 mW repectively. The prototypes have been produced with a commercial GaAs-E/D foundry process and may find application in WLAN or future low cost PCS terminals.
{"title":"A Monolithic 2.44 GHz Transceiver Frontend","authors":"W. Baumberger","doi":"10.1109/EUMA.1994.337353","DOIUrl":"https://doi.org/10.1109/EUMA.1994.337353","url":null,"abstract":"The design, fabrication and prototype evaluation of a single chip transceiver frontend for the 2.44 GHz-frequency band is presented. The chip architecture, circuit design and the measured, results are described. The transmitter section of the IC comprises an interface to CMOS logic, a BPSK modulator providing the high carrier suppression needed for direct spread spectrum modulation, and an RF driver amplifier. The receive section is aconventional downcotiverter with an LNA stage, amixerand a three stage IF preamplifier (frequency range 50 to 500 MHz) with gain control. In addition, the chip includes a local oscillator chain to feed both TX and RX mixers (1.2 GHz oscillator, prescaler for PLL support and frequency doubler). Chip size. and power consumption is 3 mm2 and 400 mW repectively. The prototypes have been produced with a commercial GaAs-E/D foundry process and may find application in WLAN or future low cost PCS terminals.","PeriodicalId":440371,"journal":{"name":"1994 24th European Microwave Conference","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128501798","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 : 1994-10-01DOI: 10.1109/EUMA.1994.337421
A. Khanifar, A. Khosrowbeygi, R. Green
The analysis and simulation techniques required to evaluate and optimize the perfcrmance of photoparametric amplifiers are presented in this paper. The photoparametric mode of operation involves optical detection and amplification within a single device. The amplifier operation is based on non-linear characteristics of the photodiode and therefore, in system applications a full evaluation of amplifier performance in terms of intermodulation distortion is required. This is particularly important when such an amplifier is used on the receiving end of a sub-carrier multiplexed system. In this paper the simulation techniques and device structures are discussed, and the results and the implications are also presented.
{"title":"The Analysis Photoparametric Amplifiers Using Harmonic Balance Technique","authors":"A. Khanifar, A. Khosrowbeygi, R. Green","doi":"10.1109/EUMA.1994.337421","DOIUrl":"https://doi.org/10.1109/EUMA.1994.337421","url":null,"abstract":"The analysis and simulation techniques required to evaluate and optimize the perfcrmance of photoparametric amplifiers are presented in this paper. The photoparametric mode of operation involves optical detection and amplification within a single device. The amplifier operation is based on non-linear characteristics of the photodiode and therefore, in system applications a full evaluation of amplifier performance in terms of intermodulation distortion is required. This is particularly important when such an amplifier is used on the receiving end of a sub-carrier multiplexed system. In this paper the simulation techniques and device structures are discussed, and the results and the implications are also presented.","PeriodicalId":440371,"journal":{"name":"1994 24th European Microwave Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128546130","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 : 1994-10-01DOI: 10.1109/EUMA.1994.337453
J. Ladvánszky
Our purpose is twofold: to compare two frequently used circuits modelling MESFET and HEMT packages, and to outline a novel task description for optimizing circuit elements of the package model.
{"title":"On package modelling","authors":"J. Ladvánszky","doi":"10.1109/EUMA.1994.337453","DOIUrl":"https://doi.org/10.1109/EUMA.1994.337453","url":null,"abstract":"Our purpose is twofold: to compare two frequently used circuits modelling MESFET and HEMT packages, and to outline a novel task description for optimizing circuit elements of the package model.","PeriodicalId":440371,"journal":{"name":"1994 24th European Microwave Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129127061","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 : 1994-10-01DOI: 10.1109/EUMA.1994.337343
P. Wang, R. Carter, B. Basu
The Pierce impedance of helix slow-wave structures has been measured using nonresonant perturbation techniques. Effects of space harmonics and TE fields were demonstrated using experimental results for the first time. It was found that there was an error in the derivation of the correction factor commonly used for the uniform-axial-field assumption. It was shown that this error should be corrected at higher frequencies for accurate measurements. Using an automated set-up and improved experimental techniques the measurement repeatability of the existing technique has been improved from 5% to 2%.
{"title":"An Improved Technique for Measuring the Pierce Impedance of Helix Slow-Wave Structures","authors":"P. Wang, R. Carter, B. Basu","doi":"10.1109/EUMA.1994.337343","DOIUrl":"https://doi.org/10.1109/EUMA.1994.337343","url":null,"abstract":"The Pierce impedance of helix slow-wave structures has been measured using nonresonant perturbation techniques. Effects of space harmonics and TE fields were demonstrated using experimental results for the first time. It was found that there was an error in the derivation of the correction factor commonly used for the uniform-axial-field assumption. It was shown that this error should be corrected at higher frequencies for accurate measurements. Using an automated set-up and improved experimental techniques the measurement repeatability of the existing technique has been improved from 5% to 2%.","PeriodicalId":440371,"journal":{"name":"1994 24th European Microwave Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129657151","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 : 1994-10-01DOI: 10.1109/EUMA.1994.337487
M. Lisi, V. Santachiara
The authors describe the study and the development of the latest generation of the European Meteorological Satellite. The paper focusses the spacecraft antenna farm, discussing all the technological aspects involved in the antenna subsystem design. Several antenna configurations are reviewed and trade-offs are performed. Particular attention is paid to the technologies considered, especially for the beamforming networks.
{"title":"Antenna Technologies for the Second Generation of European Meteorological Satellite","authors":"M. Lisi, V. Santachiara","doi":"10.1109/EUMA.1994.337487","DOIUrl":"https://doi.org/10.1109/EUMA.1994.337487","url":null,"abstract":"The authors describe the study and the development of the latest generation of the European Meteorological Satellite. The paper focusses the spacecraft antenna farm, discussing all the technological aspects involved in the antenna subsystem design. Several antenna configurations are reviewed and trade-offs are performed. Particular attention is paid to the technologies considered, especially for the beamforming networks.","PeriodicalId":440371,"journal":{"name":"1994 24th European Microwave Conference","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129890037","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 : 1994-10-01DOI: 10.1109/EUMA.1994.337433
C. Boussetta, F. Ndagijimana, J. Chilo, P. Saguet
In this paper, we present a methodology for analysing interconnections in high speed logic devices using a full wave 3D technique. The 3D TLM method is used to compute in time domain the electromagnetic field in the structure. S-parameters of discontinuities are calculated from reflected and transmitted electromagnetic fields. An equivalent network of the discontinuity is extracted from the calculated S-parameters. This methodology is general and can be applied to any planar or 3D discontinuity, over a wide range of frequency. To illustrate its performance, results are presented for a microstrip right angle bend and a via up to 60 GHz.
{"title":"A general methodology of modelling 3D discontinuities using the TLM method","authors":"C. Boussetta, F. Ndagijimana, J. Chilo, P. Saguet","doi":"10.1109/EUMA.1994.337433","DOIUrl":"https://doi.org/10.1109/EUMA.1994.337433","url":null,"abstract":"In this paper, we present a methodology for analysing interconnections in high speed logic devices using a full wave 3D technique. The 3D TLM method is used to compute in time domain the electromagnetic field in the structure. S-parameters of discontinuities are calculated from reflected and transmitted electromagnetic fields. An equivalent network of the discontinuity is extracted from the calculated S-parameters. This methodology is general and can be applied to any planar or 3D discontinuity, over a wide range of frequency. To illustrate its performance, results are presented for a microstrip right angle bend and a via up to 60 GHz.","PeriodicalId":440371,"journal":{"name":"1994 24th European Microwave Conference","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130380046","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 : 1994-10-01DOI: 10.1109/EUMA.1994.337482
A. Angelucci, P. Audagnotto, P. Corda, F. Piarulli, B. Piovano
This paper presents the development of high performance multiport hybrid networks based on the Butler matrix and a new type of phase-shifters with thick film microstrip technology for mobile-radio antenna applications. A Butler matrix can be used in DCS 1800 Base Stations as a transmit combining network and as a key element of Multiport Power Amplifiers (MPA's). As far as the phase-shifters are concerned, an innovating way of providing a phase-shift together with a very accurate slope equalization of the phase over a specified frequency band of operation is shown. This constitutes a very powerful tool in view of the design of beam forming networks for multibeam or reconfigurable antennas operating over a large bandwidth. All designs were carried out using Libra software (by Eesof) to operate over the 1.7-1.9 GHz band and prototypes were manufactured on Rogers RT6006 Duroid substrate.
{"title":"High Performance Microstrip Components for Mobile-Radio Antenna Systems","authors":"A. Angelucci, P. Audagnotto, P. Corda, F. Piarulli, B. Piovano","doi":"10.1109/EUMA.1994.337482","DOIUrl":"https://doi.org/10.1109/EUMA.1994.337482","url":null,"abstract":"This paper presents the development of high performance multiport hybrid networks based on the Butler matrix and a new type of phase-shifters with thick film microstrip technology for mobile-radio antenna applications. A Butler matrix can be used in DCS 1800 Base Stations as a transmit combining network and as a key element of Multiport Power Amplifiers (MPA's). As far as the phase-shifters are concerned, an innovating way of providing a phase-shift together with a very accurate slope equalization of the phase over a specified frequency band of operation is shown. This constitutes a very powerful tool in view of the design of beam forming networks for multibeam or reconfigurable antennas operating over a large bandwidth. All designs were carried out using Libra software (by Eesof) to operate over the 1.7-1.9 GHz band and prototypes were manufactured on Rogers RT6006 Duroid substrate.","PeriodicalId":440371,"journal":{"name":"1994 24th European Microwave Conference","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114345225","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 : 1994-10-01DOI: 10.1109/EUMA.1994.337470
L. de Menezes, W. Hoefer
This paper describes the modelling of nonlinear dispersive media in a two-dimensional TLM mesh. The nonlinear medium behavior is represented by connecting a one-port nonlinear network to each node in the mesh (shunt or series). Using this approach the propagation of electromagnetic waves in nonlinear dispersive dielectric has been simulated and soliton waves were observed.
{"title":"Modelling Nonlinear Dispersive Media in 2D TLM","authors":"L. de Menezes, W. Hoefer","doi":"10.1109/EUMA.1994.337470","DOIUrl":"https://doi.org/10.1109/EUMA.1994.337470","url":null,"abstract":"This paper describes the modelling of nonlinear dispersive media in a two-dimensional TLM mesh. The nonlinear medium behavior is represented by connecting a one-port nonlinear network to each node in the mesh (shunt or series). Using this approach the propagation of electromagnetic waves in nonlinear dispersive dielectric has been simulated and soliton waves were observed.","PeriodicalId":440371,"journal":{"name":"1994 24th European Microwave Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121542661","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 : 1994-10-01DOI: 10.1109/EUMA.1994.337251
N. Elouazzani, B. Jarry, P. Guillon
The use of microstrip radial-line dividers-combiners is a new approach in the field of microvave recursive passive filter synthesis. The filter design consists firstly of an electromagnetic theoretical analysis of microstrip radial-line dividers-combiners and secondly of its appropriate use to achieve a recursive filter transfer function. A good agreement is finally shown between theoretical and experimental results for a 2.8 GHz frequency bandwidth bandpass filter centred at 12 GHz and illustrates the validity of this synthesis.
{"title":"Uniplanar Passive Recursive Microwave Filter with Microstrip Radial-Line Power Dividers-Combiners","authors":"N. Elouazzani, B. Jarry, P. Guillon","doi":"10.1109/EUMA.1994.337251","DOIUrl":"https://doi.org/10.1109/EUMA.1994.337251","url":null,"abstract":"The use of microstrip radial-line dividers-combiners is a new approach in the field of microvave recursive passive filter synthesis. The filter design consists firstly of an electromagnetic theoretical analysis of microstrip radial-line dividers-combiners and secondly of its appropriate use to achieve a recursive filter transfer function. A good agreement is finally shown between theoretical and experimental results for a 2.8 GHz frequency bandwidth bandpass filter centred at 12 GHz and illustrates the validity of this synthesis.","PeriodicalId":440371,"journal":{"name":"1994 24th European Microwave Conference","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126293649","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 : 1994-10-01DOI: 10.1109/EUMA.1994.337404
Chen-Yu Chi, Gabriel M. Rebeiz
We report on the design and measurement of a new class of stripline filters for millimeter-wave applications. The novelty in this work is to suspend the interdigitated lines on a thin dielectric membrane to eliminate the dielectric losses and to render the interdigitated filter physically realizable at millimter-wave frequencies. A wide band filter with a center frequency of 13.7 GHz and a bandwidth of 45% has been fabricated. The filter exhibits a port-to-port insertion loss of 0.7dB at 13.7 GHz. This fabrication technique can be easily used at higher frequencies to result in planar low loss filters suitable for monolithic integration or surface mount devices up to 40-60 GHz.
{"title":"Novel Low-Loss Interdigitated Filters for Microwave and Millimeter-Wave Applications Using Micromachining Techniques","authors":"Chen-Yu Chi, Gabriel M. Rebeiz","doi":"10.1109/EUMA.1994.337404","DOIUrl":"https://doi.org/10.1109/EUMA.1994.337404","url":null,"abstract":"We report on the design and measurement of a new class of stripline filters for millimeter-wave applications. The novelty in this work is to suspend the interdigitated lines on a thin dielectric membrane to eliminate the dielectric losses and to render the interdigitated filter physically realizable at millimter-wave frequencies. A wide band filter with a center frequency of 13.7 GHz and a bandwidth of 45% has been fabricated. The filter exhibits a port-to-port insertion loss of 0.7dB at 13.7 GHz. This fabrication technique can be easily used at higher frequencies to result in planar low loss filters suitable for monolithic integration or surface mount devices up to 40-60 GHz.","PeriodicalId":440371,"journal":{"name":"1994 24th European Microwave Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121910295","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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