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High-power GaAs FET Amplifiers : Microwave Library - John L. B. Walker

High-power GaAs FET Amplifiers

Microwave Library

Hardcover

Published: 19th December 1993
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This book is intended for systems engineers, hybrid and monolithic power amplifier designers, engineers involved in the development of CAD programs, academics, and industrial and goverment researchers. The book is devoted exclusively to high power GaAs FET amplifier design, covering the subject comprehensively, including FET design, circuit design, thermal and reliability analysis, and systems applications.

Prefacep. xi
Introduction and Basic Theoryp. 1
Introductionp. 1
Analysis of Ideal GaAs FET Class A and B Amplifiersp. 3
Device Physics Versus Circuit Design Viewpointp. 3
Class A Amplifiersp. 4
Single-Ended Class B Amplifiers With Resistive Loadp. 11
Single-Ended Class B Amplifiers With Tuned Loadp. 15
Push-Pull Class B Amplifiersp. 18
Comparison of the Various Types of Power Amplifiersp. 21
Validity of the Preceding Analysisp. 21
The Concept of Power per Millimeter of Gatewidthp. 23
Small-Signal (Linear) and Large-Signal (Nonlinear) Models for an FETp. 24
Overview of Design Techniquesp. 30
Bandwidth Limitations of Reactively Matched Amplifiersp. 35
Output Matching Networkp. 35
Input Matching Networkp. 38
Referencesp. 40
High-Power GaAs FETsp. 43
Introductionp. 43
The Development of the High-Power GaAs FETp. 43
Current Technology for the High-Power GaAs FETp. 45
High-Power FET Design: FET Channel Cross-Section Designp. 48
The Flow of the Design Processp. 48
Designing the Epitaxial Wafer Structurep. 50
Determination of the Gate Lengthp. 56
The Scaling Lawp. 58
Breakdown Voltage and Recess Structurep. 66
Parasitic Resistancep. 72
Equivalent Circuitsp. 74
High-Power FET Design: FET Pattern Designp. 77
The Flow of the Design Processp. 77
Output Power and Total Gatewidthp. 77
Determination of the Unit Gatewidthp. 80
Chip Sizep. 83
Determination of the Number of Padsp. 84
Pattern Layoutp. 87
Chip Backside Structurep. 90
Thermal Propertiesp. 94
Manufacturingp. 97
Epitaxial Wafer Growthp. 97
Flow of the Wafer Manufacturing Processp. 103
Isolationp. 103
Ohmic Electrode Formationp. 105
Gate Electrode Formationp. 108
Protective Layersp. 111
Overlay Wiringp. 112
Backside Processing and Via-Hole Connectionsp. 112
Evaluationp. 113
Evaluation of dc Characteristicsp. 113
Output Power Measurementp. 114
Measurement of Distortion Featuresp. 118
Impedance Measurement and Load-Pull Measurementp. 120
Current FETsp. 123
Standard FET Chipsp. 123
Internally Matched FETsp. 128
MMIC Power Amplifiersp. 134
Trends in Technologyp. 136
Material Technology: The InP MISFETp. 137
The Heterojunction FET: HEMT and Heterostructure MISFETp. 139
The Heterojunction Bipolar Transistorp. 141
Conclusionp. 142
Referencesp. 143
Computer-Aided Design of GaAs FET Power Amplifiersp. 147
Introductionp. 147
GaAs FET Nonlinear Modelsp. 148
The MESFET Large-Signal RF Equivalent Circuitp. 149
The MESFET Static dc Modelp. 162
General Guidelines for Large-Signal Model Extractionp. 172
A Large-Signal Amplifier Simulationp. 173
The FLK202XV Large-Signal Modelp. 173
Simulation of the 3.7- to 4.2-GHz, 1-W Class AB Amplifierp. 174
Referencesp. 188
High-Power GaAs FET Amplifier Designp. 189
Introductionp. 189
Budgeting Transmitting Chain RF Performancep. 189
Performance Characterization and Modelingp. 192
Pulsed RF Testingp. 192
Bias Points and Class of Operationp. 194
Small-Signal Modelingp. 195
Design Techniquesp. 198
Load-Pullp. 198
Nonlinear CADp. 199
Modified Cripps Methodp. 199
Scalingp. 204
Matching Network Designp. 208
Output and Interstage Network Load Line Analysisp. 209
Harmonic Termination Effectsp. 210
Stability Considerationsp. 212
Thermal Considerationsp. 212
Gate Current and Insertion Phasep. 215
Dual-Gate FET Power Amplifierp. 216
Referencesp. 225
Thermal Effects and Reliabilityp. 227
Introductionp. 227
Thermal Fundamentalsp. 228
Thermal Calculations for Practical FETsp. 229
Pulsed Operationp. 240
Measurement of Thermal Resistance and Channel Temperaturep. 243
Reliabilityp. 248
Failure Mechanismsp. 248
Reliability Statisticsp. 250
Reliability Testingp. 257
Conclusionp. 260
Referencesp. 260
Combining Techniquesp. 263
Introductionp. 263
Distributed Amplifier Power Combiningp. 264
Small-Signal Analysisp. 264
Effect of Resistive Terminations and Loss Within the FET on Small-Signal Analysisp. 271
Large-Signal Analysisp. 275
Passive Power Combining/Dividing Networksp. 281
Two-Way In-Phase Power Combiner/Divider Networksp. 282
Two-Way Quadrature-Phase Power Combiner/Divider Networksp. 285
N-Way Power Combiner/Divider Networksp. 289
Power Combining Methodsp. 292
Corporate Power Combiningp. 292
Serial Power Combiningp. 302
N-Way Power Combiningp. 305
Appendix 6Ap. 307
Referencesp. 311
Systems Applications of GaAs FET Power Amplifiersp. 315
Introductionp. 315
Satellite Applicationsp. 316
Reliabilityp. 316
Active Phased Arraysp. 317
Power Combined Amplifiersp. 319
Mobile Tacticalp. 321
Earth Terminalsp. 328
Terrestrial Telecommunicationsp. 331
Line-of-Sight Linksp. 332
Linearized Amplifiersp. 332
Radar and EW Applications for High-Power GaAs FET Amplifiersp. 334
Referencesp. 350
About the Authorsp. 353
Indexp. 357
Table of Contents provided by Syndetics. All Rights Reserved.

ISBN: 9780890064795
ISBN-10: 0890064792
Series: Microwave Library
Audience: General
Format: Hardcover
Language: English
Number Of Pages: 388
Published: 19th December 1993
Publisher: Artech House Publishers
Country of Publication: US
Dimensions (cm): 22.9 x 15.2  x 2.5
Weight (kg): 0.74