射频电路设计 英文版PDF电子书下载

Introduction 1

1 Introduction to RF electronics 1

The electromagnetic spectrum 1

Units and physical constants 2

Microwave letter bands 5

RF components, layout, and construction 7

Coaxial cable transmission line( coax ) 14

Warning 18

Vectors 19

Tuned resonant circuits 19

2 RF components and tuned circuits 19

Inductance and inductors 21

Capacitors and capacitance 33

Voltage and current in capacitor circuits 40

Tuned RF/IF transformers 51

3 Variable capacitors in RF circuits 59

Straight-line capacitance vs straight-line capacitors 63

Special variable capacitors 64

Varactor applications 69

Note and warning! 70

4 Winding your own coils 73

Amidon Associates coil system 74

Making your own toroid-core inductors and RF transformers 77

Ferrite and powdered-iron rods 92

Project 4-1 95

References 104

5 Radio receivers: Theory and projects 105

The tuner 106

Tuned radio-frequency(TRF)receivers 110

Superheterodyne receivers 112

Receiver circuits you can build 126

Basic theory of operation 143

6 Direct-conversion radio receivers 143

Problems associated with DCR designs 146

Some practical design approaches 156

References and notes 170

7 RF amplifier and preselector circuits 171

JFET preselector circuits 173

MOSFET preselector circuits 176

Noise and preselectors 179

Broadband RF preamplifier for VLF, LF, and AM BCB 179

Broadband RF amplifier(50-Ωinput and output) 187

Broadband or tuned RF/IF amplifier using the MC-1350P 188

VLF preamplifier 189

Conclusion 192

8 Building IF amplifiers 193

Amplifier circuits 193

Cascode pair amplifier 195

Universal IF amplifier 196

Coupling to other filters 200

IC IF amplifiers 200

IF processing Ics 203

Successive detection logarithmic amplifiers 203

Filter switching in IF amplifiers 205

References 206

9 Interpreting radio receiver specifications 207

A hypothetical radio receiver 207

Units of measure 211

Dynamic performance 230

Dynamic range 235

Receiver improvement strategies 240

References 241

10 Building signal-generator and oscillator circuits 243

Types of oscillator circuits 243

1-to 20-MHz crystal oscillator 245

HF/VHF buffer amplifier 247

455-kHz AM IF-amplifier test-and -alignment oscillator 248

Signal generator for the AM and short-wave bands 249

11 RF directional couplers 253

Conclusion 257

References 257

12 The RF hybrid coupler 259

Applications of hybrids 259

Phase-shifted hybrids 262

Conclusion 264

13 Building simple VLF radio receivers 267

Receiver types 268

Tuning circuit problems 270

A VLF receiver project 276

References and notes 284

14 What s that mess coming from my receiver? 285

Radio station interference 285

Other interference 289

15 Filtering circuits against EMI 293

Means of EMI transmission 293

Electronic noise 295

Counters to EMI 296

Common mode and differential currents 298

AC power line filtering 302

Special medical EMI problems 302

Computer EMI 303

Conclusion 304

16 Measuring inductors and capacitors at RF frequencies 305

VSWR method 305

Voltage divider method 307

Frequency-shifted oscillator method 309

Signal generator method 309

Using RF bridges 310

Finding parasitic capacitances and inductances 315

Conclusion 317

17 Building and using the RF noise bridge 319

Adjusting antennas 321

Resonant frequency 322

Impedance matching approaches 322

Capacitance and inductance measurements 324

18 Vectors for RF circuits 327

19 Impedance matching: Methods and circuits 331

L-section network 332

Pi-(π)networks 334

Split-capacitor network 335

Transmatch circuit 335

Coaxial cable balun transformaers 338

Matching stubs 338

Quarter-wavelength matching sections 339

Series-matching section 340

20 Using the double-balanced mixer(DBM) 343

Diplexer circuits 344

JFET and MOSFET doubly balanced mixer circuits 347

Doubly balanced diode mixer circuits 350

Bipolar transconductance cell DBMs 355

Preamplifiers and postamplifiers 359

Conclusion 363

References 363

21 PIN diodes and their uses 365

PIN diode switch circuits 366

PIN diode applications 369

Conclusion 373

22 UHF and microwave diodes, transistors, and integrated circuits 375

Diode devices 375

Introduction to negative resistance(-R)devices 382

UHF and microwave RF transistors 399

Semiconductor overview 400

Selecting transistors 413

23 LC RF filter circuits 431

Low pass, high pass, bandpass, and notch 431

Filter applications 432

Filter construction 434

Filter design approach 435

Low-pass filters 435

High-pass filters 437

Bandpass filters 440

Notch filters 443

More on bandpass filters 447

Conclusion 447

24 Time-domain reflectometry on a budget 449

The basis of TDR 449

The pulse source 450

Test set-up 451

Some actual measurements 451

25 Solving frequency drift problems 455

Frequency shift problems 455

Drift problems 457

VHF problems 458

Problems with older equipment 462

Heat problems 462

Equipment modifications 462

26 The Smith chart 463

Smith chart components 463

Smith chart applications 475

27 Detector and demodulator circuits 487

AM envelope detectors 487

Balanced demodulators 494

Noise 494

Synchronous AM demodulation 495

Double-sideband(DSBSC)and single-sideband(SSBSC) suppressed carrier demodulators 495

FM and PM demodulator circuits 502

Discriminator circuits 503

Ratio detector circuits 504

Pulse-counting detectors 506

Phase locked loop FM/PM detectors 507

Quadrature detector 508

Index 511

About the author 534