天线理论Contents 1 INTRODUCTION 2 BASIC CONCEPTS OF ANTENNAS 2.1 RADIATION MECHANISM . . . . . . . . . . . . . . . . . . . . 2.2 TWO KINDS OF ELEMENTARY SOURCES-INFINITESIMAL DIPOLE AND HUYGENS’ PLANAR ELEMENT . . . . . . . . 2.2.1 Radiated Fields Generated by an Innitesimal Electric Dipole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2.2 Radiation Field Generated by an Innitesimal Magnetic Dipole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2.3 Radiation Fields Generated by Huygens’ Planar element . 2.3 FUNDAMENTAL PARAMETERS OF ANTENNAS . . . . . . . 2.3.1 Radiation Pattern Lobes . . . . . . . . . . . . . . . . . . . 2.3.2 Directivity and Gain . . . . . . . . . . . . . . . . . . . . . 2.3.3 Polarization . . . . . . . . . . . . . . . . . . . . . . . . . . 3 MICROSTRI……