Chapter 12: ANTENNAS
Chapter 12 examines antennas as electromagnetic radiators and collectors. We will explore radiation mechanisms, current distributions, polarization, radiation patterns, directivity, gain, impedance, and bandwidth. We will see how antenna geometry controls field distribution and how antenna performance influences link budgets, coverage, and interference.
Chapter Contents
- 12.1 INTRODUCTION
- 12.2 AN ISOTROPIC RADIATOR
- 12.3 ANTENNA PROPERTIES
- 12.4 THE DIPOLE AND MONOPOLE
- 12.5 TRAVELLING WAVE ANTENNAS
- 12.6 HF SURFACE WAVE ANTENNAS
- 12.7 HF SKY WAVE ANTENNAS
- 12.8 VHF GROUND WAVE ANTENNAS
- 12.9 UHF / SHF ANTENNAS
- 12.10 PHASED ARRAYS
- 12.11 MULTIBEAM ANTENNAS
- 12.12 BEAM SHAPING
- 12.13 CHAPTER SUMMARY
- 12.14 LOOKING AHEAD
- 12.15 REVISION QUESTIONS
- 12.16 FREQUENTLY ASKED QUESTIONS (FAQ)