Radiation efficiency information

In antenna theory, radiation efficiency is a measure of how well a radio antenna converts the radio-frequency power accepted at its terminals into radiated...

of maximising efficiency In thermodynamics: Energy conversion efficiency, measure of second law thermodynamic loss Radiation efficiency, ratio of radiated...

In the field of antenna design the term radiation pattern (or antenna pattern or far-field pattern) refers to the directional (angular) dependence of...

luminous efficiency of a source, overall luminous efficiency or lighting efficiency. The main difference between the luminous efficacy of radiation and the...

An antenna's directivity is greater than its gain by an efficiency factor, radiation efficiency. Directivity is an important measure because many antennas...

It is not to be confused with radiation efficiency or antenna efficiency. Antenna [aperture] illumination efficiency is defined as "The ratio, usually...

Thermal radiation is electromagnetic radiation emitted by the thermal motion of particles in matter. Thermal radiation transmits as an electromagnetic...

The history of radiation protection begins at the turn of the 19th and 20th centuries with the realization that ionizing radiation from natural and artificial...

small loop antennas have small radiation resistance which is dwarfed by ohmic losses, resulting in a poor antenna efficiency. They are thus mainly used as...

electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight...

mechanical work, light (radiation), or heat. The resulting value, η (eta), ranges between 0 and 1. Energy conversion efficiency depends on the usefulness...

due to resonance, which can cause low efficiency with popular impedance matching schemes. The radiation efficiency of the wire is not affected; if the antenna...

Infrared (IR; sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths longer than that of visible light but shorter than...

along the length of the conductors. Typical radiation efficiency is in the order of 40–50%. The low efficiency significantly reduces gain for a given main...

roughness noise. This noise is largely broad-band near the surface, and radiation efficiency and material geometry dictates which frequency content is radiated...

in radiation protection, assay of radioactive materials and physics research because they can be made inexpensively yet with good quantum efficiency, and...

measurement of ionising radiation the counting efficiency is the ratio between the number of particles or photons counted with a radiation counter and the number...

small loops; their radiation efficiency lies in between the extreme high efficiency of large loops and the generally poor efficiency of small loops. Halos...

pattern synthesis. Additional issues to be considered are matching, radiation efficiency and bandwidth. The design of an electronically steerable antenna...

Photosynthetically active radiation (PAR) designates the spectral range (wave band) of solar radiation from 400 to 700 nanometers that photosynthetic organisms...

electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light (or simply light)...

not all of, the shortwave spectrum with good radiation efficiency and minimal compromise of the radiation pattern. Most practical broadband antennas compromise...

contained in mobile phones, including smartphones, emit radiofrequency (RF) radiation (non-ionizing "radio waves" such as microwaves); the parts of the head...

defense Geiger counters, handheld radiation monitors, both G-M and ion chambers Counting efficiency the ratio of radiation events reaching a detector and...

optimal solar radiation levels) and do not convert all harvested energy into biomass, which results in a maximum overall photosynthetic efficiency of 3 to 6%...