Table of Contents Introduction: Why "Antenna = Performance Ceiling" Core Concepts Overview 2.1 Standards and Frequency Bands: Impact on Propagation and Size 2.2 Antenna Metrics: Focus on Key Points 2.3 Layout and Installation: Translating Specs to Reality 2.4 What to Measure: Know Your Metrics 2.5 Quick Diagnosis and Action Mapping Antenna Types and Comparison (Pros, Cons, and Applications) 3.1 Omnidirectional Antennas 3.2 Directional Antennas 3.3 Combo/Integrated Antennas 3