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Handbook of Microwace Component Measurement 包含高级VNA校准/解嵌技术4 Time Domain Transforms 211
4.1 Introduction 211
4.2 The Fourier Transform 212
4.2.1 The Continuous Fourier Transform 212
4.2.2 Even and Odd Functions and the Fourier Transform 212
4.2.3 Modulation (Shift) Theorem 213
4.3 The Discrete Fourier Transform 214
4.3.1 FFT (Fast Fourier Transform) and IFFT
(Inverse Fast Fourier Transform) 214
4.3.2 Discrete Fourier Transforms 216
4.4 Fourier Transform (Analytic) vs VNA Time Domain Transform 216
4.4.1 Defining the Fourier Transform 217
4.4.2 Effects of Discrete Sampling 217
4.4.3 Effects of Truncated Frequency 219
4.4.4 Windowing to Reduce Effects of Truncation 222
4.4.5 Scaling and Renormalization 224
4.5 Low-Pass and Band-Pass Transforms 224
4.5.1 Low-Pass Impulse Mode 224
4.5.2 DC Extrapolation 225
4.5.3 Low-Pass Step Mode 225
4.5.4 Band-Pass Mode 227
4.6 Time Domain Gating 228
4.6.1 Gating Loss and Renormalization 229
4.7 Examples of Time Domain Transforms of Various Networks 232
4.7.1 Time Domain Response of Changes in Line Impedance 232
4.7.2 Time Domain Response of Discrete Discontinuities 233
4.7.3 Time Domain Responses of Various Circuits 233
4.8 The Effects of Masking and Gating on Measurement Accuracy 234
4.8.1 Compensation for Changes in Line Impedance 234
4.8.2 Compensation for Discrete Discontinuities 236
4.8.3 Time Domain Gating 237
4.8.4 Estimating an Uncertainty Due to Masking 241
4.9 Conclusions 241
References 242
6 Measuring Amplifiers 314
6.1 Amplifiers as Linear Devices 314
6.1.1 Pretesting an Amplifier 315
6.1.2 Optimizing VNA Settings for Calibration 317
6.1.3 Calibration for Amplifier Measurements 318
6.1.4 Amplifier Measurements 322
6.1.5 Analysis of Amplifier Measurements 328
6.1.6 Saving Amplifier Measurement Results 338
6.2 Gain Compression Measurements 342
6.2.1 Compression Definitions 342
6.2.2 AM-to-PM or Phase Compression 347
6.2.3 Swept Frequency Gain and Phase Compression 348
6.2.4 Gain Compression Application, Smart Sweep and Safe-Sweep Mode 349
6.3 Measuring High-Gain Amplifiers 354
6.3.2 Calibration Considerations 357
6.4 Measuring High-Power Amplifiers 359
6.4.1 Configurations for Generating High Drive Power 360
6.4.2 Configurations for Receiving High Power 362
6.4.3 Power Calibration and Pre/Post Leveling 364
Handbook of Microwace Component Measurement.part2.rar
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Contents
9 Advanced Measurement Techniques 552
9.1 Creating Your Own Cal Kits 552Handbook of Componen ...
9.1.1 PCB Example 553
9.1.2 Evaluating PCB Fixtures 554
9.2 Fixturing and De-embedding 569
9.2.1 De-embedding Mathematics 570
9.3 Determining S-Parameters for Fixtures 572
9.3.1 Fixture Characterization Using One-Port Calibrations 573
9.4 Automatic Port Extensions 578
9.5 AFR: Fixture Removal Using Time Domain 583
9.6 Embedding Port-Matching Elements 588
9.7 Impedance Transformations 591
9.8 De-embedding High-Loss Devices 592
9.9 Understanding System Stability 595
9.9.1 Determining Cable Transmission Stability 595
9.9.2 Determining Cable Mismatch Stability 596
9.9.3 Reflection Tracking Stability 597Handbook of Microwace Componen ...Handbook of Microwace Componen ...Handbook of Microwace Componen ...Handbook of Microwace Componen ...Handbook of Microwace Componen ...
9.10 Some Final Comments on Advanced Techniques and Measurements 598 |
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