Linear polarization in an antenna occurs when the antenna radiates radio frequency (RF) energy along a single, straight plane.
Understanding Linear Polarization
An antenna is considered linearly polarized based on how it directs its electromagnetic waves in a single direction or path. According to the provided reference, an antenna is linearly polarized when it radiates RF energy on a single plane. This plane has a specific orientation relative to the Earth's surface.
Key Characteristics of Linear Polarization
The single plane of radiation can take a few common forms:
- Horizontal Polarization: The electric field of the radiated wave is parallel to the Earth's surface.
- Vertical Polarization: The electric field of the radiated wave is perpendicular to the Earth's surface.
- Angled Polarization: The electric field can also be oriented at any angle between horizontal and vertical.
This contrasts with circular or elliptical polarization, where the electric field vector rotates over time. For optimal signal reception, both the transmitting and receiving antennas should have the same polarization.
