Antenna Theory and Engineering

This chapter explains the field generated by the alternating electric dipole, which is closely related to EMC research in the antenna theory and engineering [1, 7, 8]. Through this chapter, our readers will learn the basic characteristics of the near field, far field, and transition zone and understand that the EMC problems usually happens with the coexistence in the near field, far field, and transition zone. This chapter also explains the radiation characteristics of the antenna. Our readers will get the knowledge of some basic concepts of the antenna, including the antenna pattern and gain. In the last section, an example is provided to illustrate that the out-of-band characteristics of the antenna have become an important factor in the EMC design and antenna layout analysis of the whole aircraft.