PD IEC TR 62630:2010 pdf – Guidance for evaluating exposure from multiple electromagnetic sources.
multiple-input and multiple-output (MIMO)
the use of multiple antennas at both the transmitter and receiver to improve communication performance. It is one of several forms of smart antenna technology
multi-band (transmitter or device)
a transmitter or device capable of operating in mote than one frequency band
multi-mode (transmitter or device)
a transmitter or wireless device capable of operating in more than one air-Interface, e.g.. UMTS, GSM and WIAN
narrowband electromagnetic source
source of electromagnetic field emissions whose occupied bandwidth is 10 % or less than its centre frequency
NOTE The terms nerrowband, broadband. uitre’wideband heiwe been used with different meanings and interpretations foe different wireless products, technologies and markets Therefore, the present definition Is explicitly intended to be applicable within the context of this Technical Report,
near-field region
a region in the time-harmonic field of an antenna, located near the antenna, in which the
electric and magnetic fields do not have a substantially plane-wave character, but vary
considerably fom point to point
NOTE The term is onty vaguely defined and has different meanings for targe and smell antennas it is further subdivided Into the reactive near-field region, which is ctosest to the antenna and contains most or nearly all of the stored energy associated with me field of the antenna, and the radiating neat-field region if the antenna hee a maximum overall dimension that is not large compared with the wavetength, the radiating near•held repon may not exist For antennas large tn terms of wavelength, the radiating near-field region is sometimes referred to as the Fresnei region on the bas’s of analogy to opticel tenninology
occupied bandwidth
width of the occupied band of an emission
peak spatial-average SAR
the maximal value of the local SAR averaged over a specified volume or mass, e.g.. any 1 g or 10 g of tissue in the shape of a cube. SAR is expressed in units of wafts per kilogram (WIkg)
phantom, (head or torso)
in the context of this Technical Report, a simplified representation or a model similar in appearance to the human (head or torso) anatomy and composed of matertals with electrical properties similar to the corresponding tissues
point source
source of radiation the dimensions of which are small enough, compared with the distance between the source and the irradiated surface, for them to be neglected in cakulations and measurements
NOTE A point source which emits uniformly in all directions is called an isotropic or uniform point source
polarisation (of a wave or field vector)
the property of a sinusoidal electromagnetic wave or field vector defined at a fixed point in space by the direction of the electric field strength vector or of any specified field vector; when this direction varies with time the property may be characterized by the locus described by the extremity of the considered fteld vector
a physical quantity describing the rate of delivery or transmission of energy. In this document. power will refer to radio frequency power with units of watts (W)
power (flux) d.nslty
the power passing through an element of surface normal to the direction of propagation of energy of an electromagnetic wave divided by the area of the element, usually expressed in watts per metre squared (WIm). Also referred to as radiant flux density
radio communication base station (RBS)
fixed equipment including the radio transmitter and associated antenna(s) as used in wireless telecommunications networks
radio frequency (RF)
the frequency in the portion of the electromagnetic spectrum that is between the audio- frequency portion and the infrared portion
NOTE The present practicable limits of radio frequency are roughly 10 kHz—300 GNz. Within this frequency range. electromagnetic radiation may be detected and amplified as an electric current at the wave trequency
reactiv, field
electric and magnetic fields surrounding an antenna or other electromagnetic devices that result in storage rather than propagation of electromagnetic energy
root-mean-square (r.m.s.) value
for a time-dependent quantity, positive square root of the mean value of the square of the quantity taken over a given time interval iT . Also referred to as effective value. For a complex quantity z depending on a real variable t, the r.ms. value of the magnitude of z is.