VHF / UHF Filters and Multicouplers: Application of Air Resonators

Table of Contents

Preface

Introduction

Chapter 1. Reminders and General Points

1.1. Lines

1.2. Adaptation and stationary waves

1.3. Smith chart

1.4. Power in a line

1.5. Line sections

1.6. Lines with losses

Chapter 2. Measurements in HF

2.1. Material

2.2. The power bench

2.3. Measurements on the network analyzer

Chapter 3. Resonant Cavities

3.1. Resonance

3.2. Coaxial cavities

3.3. Quarter-wave cavities

Chapter 4. Fabrication and Tuning of Cavities

4.1. Standard structures

4.2. Materials

4.3. Assembly

4.4. Temperature stability

4.5. Cavity tuning

Chapter 5. The Band-pass Filter

5.1. The band-pass function

5.2. Calculation of a Tchebycheff band-pass

5.3. Technologies

Chapter 6. The Combline Filter

6.1. Architecture

6.2. Dimension calculations. Dishal’s Method

6.3. Tuning of filters

Chapter 7. Channel Multiplexing

7.1. Definitions

7.2. The duplexer

7.3. The combiner

Chapter 8. Auxiliary Devices

8.1. Introduction

8.2. Circulators

8.3. The antenna alarms

8.4. Loads and attenuators

8.5. Reception amplifiers

8.6. The impedance adaptor

8.7. The 2nd harmonic rejecter

Chapter 9. Directive Couplers

9.1. Introduction

9.2. Technologies

9.3. The hybrid transformer

9.4. The 180° hybrid ring

9.5. The wireline

9.6. The “groundless” coupler

9.7. The “catnose” coupler

9.8. Discrete-elements coupler

9.9. Numerical data

9.10. Applications

Chapter 10. Helical Resonators

10.1. Introduction

10.2. Functioning

10.3. Structures

10.4. Tapping and coupling

10.5. Quality coefficient

10.6. Set-up rules

10.7. ...