SUMMARY
The electric field in an electromagnetic (EM) wave emitted by an antenna originates from the alternating current (AC) voltage source connected to the antenna. When charges accelerate due to the AC voltage, they create an electric field that propagates as part of the EM wave. Unlike a normal wire, where the electric field is neutralized by positive atomic charges, the antenna operates as an open circuit, allowing charges to flow out and back at the frequency of transmission. This mechanism is essential for understanding radiowave transmission and the generation of electric fields in antennas.
PREREQUISITES
- Understanding of electromagnetic waves
- Knowledge of alternating current (AC) voltage sources
- Familiarity with antenna theory
- Basic principles of electric fields and charge behavior
NEXT STEPS
- Research the principles of electromagnetic wave propagation
- Study antenna design and its impact on radiowave transmission
- Explore the relationship between AC voltage and electric field generation
- Learn about the behavior of charges in open versus closed circuits
USEFUL FOR
Electrical engineers, physicists, students studying electromagnetism, and anyone interested in the principles of radiowave transmission and antenna functionality.