Definition

Noun: A radiation field is a physical field that represents the energy emitted from a radiator and propagating outward into space. It describes the distribution and flow of radiant energy (such as light, heat, or radio waves) away from its source.

Usage

The term is used in physics and engineering to describe the area or region where radiant energy is present and can be measured as it travels from a source. * The antenna's design is optimized to shape its radiation field for maximum broadcast coverage. * Scientists measured the intensity of the radiation field around the experimental reactor.

Advanced Usage

• "near-field vs. far-field": In antenna theory, the radiation field is often discussed in terms of the far-field region, where the field pattern is stable and radiates freely, as opposed to the reactive near-field region closer to the source.
  • The measurements must be taken in the far-field region of the antenna's radiation field for accurate results.

Variants and Related Words

• Radiant energy (n): Energy that is transmitted in the form of electromagnetic radiation or particles.
• Electromagnetic field (n): A physical field produced by moving electrically charged objects, which encompasses both electric and magnetic field components. A radiation field is a specific, propagating type of electromagnetic field.
• Irradiance (n): The power of electromagnetic radiation per unit area incident on a surface.

Synonyms

• Radiative field
• Emission field

Related Phrases

• To calculate/model the radiation field: To determine the theoretical properties of the field.
  • Engineers use software to model the radiation field of a new satellite dish.
• Field strength/intensity: A measure of the power within the radiation field.
  • The radiation field strength decreases with distance from the source.

Noun

1. a field that represents the energy lost from the radiator to space