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Home > Science, Technology & Agriculture > Electronics and communications engineering > Electronics engineering > Electronics: circuits and components > VHF / UHF Filters and Multicouplers: Application of Air Resonators
VHF / UHF Filters and Multicouplers: Application of Air Resonators

VHF / UHF Filters and Multicouplers: Application of Air Resonators


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About the Book

This book describes the various devices used in radio communication and broadcasting to achieve high selectivity filtering and coupling. After providing background in the basics of microwave theory and more detailed material — including a special chapter on precision and errors in measurement - the reader will find detailed descriptions, manufacturing processes, and for the most useful instances a number of worked-through formulas, which will allow engineers and technicians to design circuits or components for filtering or coupling applications. Content is covered in this format across a broad range of fields including coaxial cavities, combline filters, bandpass and pass-reject duplexers, multicouplers, circulators, low-noise amplifiers, helix resonators, and much more.

Table of Contents:
Preface xi Introduction xvii Chapter 1. Reminders and General Points 1 1.1. Lines 1 1.2. Adaptation and stationary waves 4 1.3. Smith chart 6 1.4. Power in a line 6 1.5. Line sections 7 1.6. Lines with losses 9 Chapter 2. Measurements in HF 11 2.1. Material 11 2.2. The power bench 11 2.3. Measurements on the network analyzer 14 Chapter 3. Resonant Cavities 25 3.1. Resonance 25 3.2. Coaxial cavities 28 3.3. Quarter-wave cavities 29 Chapter 4. Fabrication and Tuning of Cavities 47 4.1. Standard structures 47 4.2. Materials 53 4.3. Assembly 56 4.4. Temperature stability 58 4.5. Cavity tuning 70 Chapter 5. The Band-pass Filter 83 5.1. The band-pass function 83 5.2. Calculation of a Tchebycheff band-pass 85 5.3. Technologies 87 Chapter 6. The Combline Filter 97 6.1. Architecture 97 6.2. Dimension calculations. Dishal’s Method 105 6.3. Tuning of filters 114 Chapter 7. Channel Multiplexing 129 7.1. Definitions 129 7.2. The duplexer 129 7.3. The combiner 140 Chapter 8. Auxiliary Devices 157 8.1. Introduction 157 8.2. Circulators 157 8.3. The antenna alarms 165 8.4. Loads and attenuators 170 8.5. Reception amplifiers 177 8.6. The impedance adaptor 186 8.7. The 2nd harmonic rejecter 186 Chapter 9. Directive Couplers 189 9.1. Introduction 189 9.2. Technologies 191 9.3. The hybrid transformer 194 9.4. The 180° hybrid ring 196 9.5. The wireline 198 9.6. The “groundless” coupler 199 9.7. The “catnose” coupler 201 9.8. Discrete-elements coupler 202 9.9. Numerical data 204 9.10. Applications 210 Chapter 10. Helical Resonators 213 10.1. Introduction 213 10.2. Functioning 214 10.3. Structures 215 10.4. Tapping and coupling 219 10.5. Quality coefficient 220 10.6. Set-up rules 223 10.7. Applications 224 Chapter 11. Multicouplers 225 11.1. Transmitter multicouplers (TX) 225 11.2. Receiver multicouplers (RX) 235 11.3. TX/RX multicouplers 236 11.4. TMA 240 11.5. Power and intermodulations 243 11.6. Multiband coupling 254 Chapter 12. Utilities 257 12.1. BASIC programs 257 12.2. Varia 264 Chapter 13. Various Questions and Exploratory Ways 271 13.1. The coupler without intrinsic loss 271 13.2. Infinite rejection band-pass 275 13.3. Helix TX multicoupler 276 13.4. Conclusion 278 Bibliography 281 Index 283

About the Author :
Bernard Piette is a practicing engineer. After working in submarine acoustics, HF electronics, phase-locked loops and telecommunications, he has dedicated his efforts to the design of coaxial cavities and other narrow-band resonators for the last 20 years. He has been a technical manager in several companies specializing in this field, and has designed hundreds of prototypes for numerous French private mobile radio networks such as Radiocom 2000, Rubis and Acropol.


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Product Details
  • ISBN-13: 9781118620618
  • Publisher: John Wiley & Sons Inc
  • Publisher Imprint: Wiley-ISTE
  • Language: English
  • Sub Title: Application of Air Resonators
  • ISBN-10: 1118620615
  • Publisher Date: 04 Mar 2013
  • Binding: Digital (delivered electronically)
  • No of Pages: 285


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VHF / UHF Filters and Multicouplers: Application of Air Resonators
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