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1 MHz Loadline System Useful for Quantifying Dispersion in GaAs FET's 用于定量GaAs场效应管色散的1mhz载重线系统
51st ARFTG Conference Digest Pub Date : 1998-06-12 DOI: 10.1109/ARFTG.1998.327287
T. Driver
{"title":"1 MHz Loadline System Useful for Quantifying Dispersion in GaAs FET's","authors":"T. Driver","doi":"10.1109/ARFTG.1998.327287","DOIUrl":"https://doi.org/10.1109/ARFTG.1998.327287","url":null,"abstract":"A simple and low cost system has been developed to help characterize dispersion in GaAs MESFET's. Pulsed I-V systems such as those offered commercially by HP have been used to explore this phenomena. The system described here can deliver similar results, at a lower cost, using commonplace lab equipment. The system employs a 1 MHz signal to excite a DUT, and Ids, Vds and Vgs, relationships are extracted. This low frequency RF I-V is used to create figures of merit that are related to dispersion. This paper will discuss the architecture and system components, data extraction methods, typical device data, data analysis, and application areas.","PeriodicalId":208002,"journal":{"name":"51st ARFTG Conference Digest","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126119761","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: 2
Novel Microwave Vibration Monitoring System for Industrial Power Generating Turbines 新型工业发电机组微波振动监测系统
51st ARFTG Conference Digest Pub Date : 1998-06-12 DOI: 10.1109/ARFTG.1998.327293
Martin Wagner, A. Schulze, Martin Vossiek, C. Stephelbauer, Robert Weigel, N. Vortmeyer, Patric Heide
{"title":"Novel Microwave Vibration Monitoring System for Industrial Power Generating Turbines","authors":"Martin Wagner, A. Schulze, Martin Vossiek, C. Stephelbauer, Robert Weigel, N. Vortmeyer, Patric Heide","doi":"10.1109/ARFTG.1998.327293","DOIUrl":"https://doi.org/10.1109/ARFTG.1998.327293","url":null,"abstract":"A novel microwave sensor system for real-time monitoring of turbine blade vibrations is reported. The self-calibration of the sensor modules, a key feature of the implemented concept, is based on adaptive frequency tuning of the microwave source. By using this calibration, degradation of the measurement performance caused by temperature drift and dirt deposit is compensated. During pilot runs with a 65 MW gas turbine the microwave system proved to give excellent measurement results.","PeriodicalId":208002,"journal":{"name":"51st ARFTG Conference Digest","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128337120","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
Satellite Communications Payload Simulator for Mobile and Fixed Satellite Services 移动和固定卫星业务卫星通信有效载荷模拟器
51st ARFTG Conference Digest Pub Date : 1998-06-12 DOI: 10.1109/ARFTG.1998.327272
P. Palena, G. Silverman, Sam Samani, James Hopkins, Stephanie Sroczyk
{"title":"Satellite Communications Payload Simulator for Mobile and Fixed Satellite Services","authors":"P. Palena, G. Silverman, Sam Samani, James Hopkins, Stephanie Sroczyk","doi":"10.1109/ARFTG.1998.327272","DOIUrl":"https://doi.org/10.1109/ARFTG.1998.327272","url":null,"abstract":"As the demand for advanced satellite telecommunication services increase, the time to market for deployment of these systems has been significantly reduced. At the same time, there has been a transition from simple transponder (¿bent pipe¿) architecture operating FM/FDMA to more complex digitally switched systems. Both FDMA and TDMA systems are in use and support both analog and digital traffic with increasing emphasis on the latter. Design and test of these newer systems requires more sophisticated tools. To meet the challenging market demand, a universal Baseband and RF/Microwave Communications Payload and System Simulator (COMPASS) that is used to reduce design cycle time, validate payload software models, streamline manufacturing test matrices and study on orbit anomalies has been built and is in operation. This system contains baseband, RF, microwave, antenna and transmission path processing components. COMPASS has the capability to interactively program and reconfigure various traffic models and to load transponder channels for analysis of Mobile Satellite Service (MSS) and Fixed Satellite Service (FSS). This paper highlights some results of nonlinear transponder studies using multi-carrier CW and QPSK signals and describes the COMPASS system.","PeriodicalId":208002,"journal":{"name":"51st ARFTG Conference Digest","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129915989","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: 0
Characterization and Verification of CDMA Power Amplifiers CDMA功率放大器的特性与验证
51st ARFTG Conference Digest Pub Date : 1998-06-12 DOI: 10.1109/ARFTG.1998.327275
R. Mahmoudi, P. Valk, K. Mouthaan, J. Tauritz, P. Snoeij
{"title":"Characterization and Verification of CDMA Power Amplifiers","authors":"R. Mahmoudi, P. Valk, K. Mouthaan, J. Tauritz, P. Snoeij","doi":"10.1109/ARFTG.1998.327275","DOIUrl":"https://doi.org/10.1109/ARFTG.1998.327275","url":null,"abstract":"The increased use of spread spectrum techniques in modern communication system has confronted designers with the non-trivial task of interpreting and translating system demands into circuit specification and verification. To overcome these constraints, we present an integral strategy for spread spectrum simulation and test, which will be illustrated using the North American Digital Cellular, IS-95 standard. Taking advantage of HP-EEsof¿s Circuit Envelope Simulator developed for the simulation of RF circuits driven by complex signals, we have implemented the complete IS-95 standard in their Microwave Design System (MDS). This facilitates simulation and test at the hardware and software level using physical CDMA signals as defined in the simulator and generated externally. CDMA design examples are introduced and considered in some depth. This method can be extended for testing a wide variety of circuits intended for use in other communication systems such as W-CDMA, GSM and DECT.","PeriodicalId":208002,"journal":{"name":"51st ARFTG Conference Digest","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133516881","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: 3
Vector Corrected Harmonic Measurement of High Power Transistors 大功率晶体管的矢量校正谐波测量
51st ARFTG Conference Digest Pub Date : 1998-06-12 DOI: 10.1109/ARFTG.1998.327274
L. Pattison, A. Greer, D. Linton, A. Patterson, J. Leckey
{"title":"Vector Corrected Harmonic Measurement of High Power Transistors","authors":"L. Pattison, A. Greer, D. Linton, A. Patterson, J. Leckey","doi":"10.1109/ARFTG.1998.327274","DOIUrl":"https://doi.org/10.1109/ARFTG.1998.327274","url":null,"abstract":"A large signal measurement system for characterisation of high power packaged devices has been developed. The system is based upon the Microwave Transition Analyser (HP 78002) integrated with a novel test jig which has been developed `in-house¿. The measurement system is fully vector corrected to the device planes and allows measurement of the magnitude and phase of the output harmonics under different drive levels, dc bias conditions, fundamental load impedance and frequency. Measured results are shown for a 4W Bipolar device.","PeriodicalId":208002,"journal":{"name":"51st ARFTG Conference Digest","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132837899","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
Accuracy Improvements in Microwave Noise Parameter Determination 微波噪声参数测定精度的提高
51st ARFTG Conference Digest Pub Date : 1998-06-12 DOI: 10.1109/ARFTG.1998.327278
M. Schmatz, H. Benedickter
{"title":"Accuracy Improvements in Microwave Noise Parameter Determination","authors":"M. Schmatz, H. Benedickter","doi":"10.1109/ARFTG.1998.327278","DOIUrl":"https://doi.org/10.1109/ARFTG.1998.327278","url":null,"abstract":"An improved method for the determination of noise parameters from several noise figure measurements on arbitrary source reflections is presented. By applying a transformation algorithm to the measured data, the influence of measurement errors is substantially reduced. The straight forward method needs no iterative estimation of the noise parameters. Synthetic measurements with random measurement errors associated to the measured noise figures as well as to the measured source reflection coefficients were investigated. It is shown, that the magnitude of the source reflection coefficients used for noise figure measurements should be smaller than 0.8, regardless of the magnitude of the optimum noise source reflection coefficient. The new determination method was implemented in a commercial noise parameter system where the measurement capabilities for small transistors was improved considerably.","PeriodicalId":208002,"journal":{"name":"51st ARFTG Conference Digest","volume":"66 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131894683","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
Flexible, Low Cost, Automatic Emulator for Channel Characterization of Wireless and Satellite Systems 无线和卫星系统信道特性的灵活、低成本、自动仿真器
51st ARFTG Conference Digest Pub Date : 1998-06-12 DOI: 10.1109/ARFTG.1998.327273
C. Briso, J. Alonso
{"title":"Flexible, Low Cost, Automatic Emulator for Channel Characterization of Wireless and Satellite Systems","authors":"C. Briso, J. Alonso","doi":"10.1109/ARFTG.1998.327273","DOIUrl":"https://doi.org/10.1109/ARFTG.1998.327273","url":null,"abstract":"Actually there is a great increase in the develop of microwave land mobile communications system like Iridium, Globalstar, I C 0 and others. This new systems are based on the use of constelation of satellites with low and medium orbit ( LEO, MEO) which has propagation effects like strong doppler shifts or long delaies that require countermeasurements and must also be able to work in many differents enviroments and conditions, so that more powerful1 tools and new equipments will be required to verify the behaivour of this systems before and after their implantation.","PeriodicalId":208002,"journal":{"name":"51st ARFTG Conference Digest","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114462467","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: 0
Characterization and Reduction of Local Oscillator Phase Noise Effects in DSB Radios DSB无线电中本振相位噪声效应的表征与降低
51st ARFTG Conference Digest Pub Date : 1998-06-12 DOI: 10.1109/ARFTG.1998.327276
E. Godshalk, V. Tripathi
{"title":"Characterization and Reduction of Local Oscillator Phase Noise Effects in DSB Radios","authors":"E. Godshalk, V. Tripathi","doi":"10.1109/ARFTG.1998.327276","DOIUrl":"https://doi.org/10.1109/ARFTG.1998.327276","url":null,"abstract":"The accuracy of predicting a signal¿s jitter fiom its phase noise is investigated with experiments. It has been discovered, and demonstrated experimentally, that for a specified phase synchronization between transmitter and receiver local oscillators a significant reduction in recovered signal phase noise is possible in double side band radios.","PeriodicalId":208002,"journal":{"name":"51st ARFTG Conference Digest","volume":"329 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133224227","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
Multi-wire Microstrip Interconnections: a Systematic Analysis for the Extraction of an Equivalent Circuit 多线微带互连:等效电路提取的系统分析
51st ARFTG Conference Digest Pub Date : 1998-06-07 DOI: 10.1109/ARFTG.1998.327299
F. Alimenti, P. Mezzanotte, L. Roselli, R. Sorrentino
{"title":"Multi-wire Microstrip Interconnections: a Systematic Analysis for the Extraction of an Equivalent Circuit","authors":"F. Alimenti, P. Mezzanotte, L. Roselli, R. Sorrentino","doi":"10.1109/ARFTG.1998.327299","DOIUrl":"https://doi.org/10.1109/ARFTG.1998.327299","url":null,"abstract":"A systematic analysis of the multi-wire microstrip interconnection is proposed in this work. A family of structures has been analyzed by considering single-, double- and triple-wire interconnections and by varying the typical geometrical parameters. The Finite Difference Time Domain (FDTD) method has been used for the electromagnetic simulation of these structures. The curvature of the wire has been modeled with a polygonal approximation and, in the multi-wire case, the wires have been assumed to be parallel. The computed scattering parameters have been then used to extract a low-pass ¿-network equivalent to the interconnection. In this way the series inductance of the interconnection has been characterized as a function of the spacing between the wires. Finally the scattering parameters for single-, double- and triple-wire interconnections have been compared. This work proposes a method to derive accurate and efficient equivalent circuits of the multi-wire interconnections suitable for CAD implementation.","PeriodicalId":208002,"journal":{"name":"51st ARFTG Conference Digest","volume":"516 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130840440","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: 18
A Broadband Linearizer for Ka-Band Satellite Communication 用于ka波段卫星通信的宽带线性化器
51st ARFTG Conference Digest Pub Date : 1998-06-07 DOI: 10.1109/ARFTG.1998.327291
W. Zhang, C. Yuen
{"title":"A Broadband Linearizer for Ka-Band Satellite Communication","authors":"W. Zhang, C. Yuen","doi":"10.1109/ARFTG.1998.327291","DOIUrl":"https://doi.org/10.1109/ARFTG.1998.327291","url":null,"abstract":"A compact, broadband linearizer has been developed at Space Systems Loral for Ka-Band communication satellite (20 GHz down link). The pre-distortion type linearizer is capable of providing up to 10 dB gain compensation and 80 degree phase compensation, and is suitable for broadband communicztion satellite.","PeriodicalId":208002,"journal":{"name":"51st ARFTG Conference Digest","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129370995","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
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