EDUCATION AND COMMUNICATIONS|communications
- neartú aeróige Tagairt Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- antenna gain | gain of an antenna
- en
- Sainmhíniú ratio, usually expressed in decibels, of the power required at the input of a loss-free reference antenna to the power supplied to the input of the given antenna to produce, in a given direction, the same field strength or the same power flux-density at the same distance Tagairt International Telecommunication Union, Radio Regulations (29.6.2021), Art. 1 § 1.160, p. 22
- Nóta When not specified otherwise, the gain refers to the direction of maximum radiation. The gain may be considered for a specified polarization. Depending on the choice of the reference antenna a distinction is made between) absolute or isotropic gain (Gi), when the reference antenna is an isotropic antenna isolated in space; b)gain relative to a half-wave dipole (Gd), when the reference antenna is a half-wave dipole isolated in space whose equatorial plane contains the given direction; c) gain relative to a short vertical antenna (Gv), when the reference antenna is a linear conductor, much shorter than one quarter of the wavelength, normal to the surface of a perfectly conducting plane which contains the given direction.
- gain directionnel | gain d'une antenne | gain directif
- fr
- Sainmhíniú Quotient, en décibels, de la puissance rayonnée par une antenne omnidirectionnelle de référence, etde la puissance rayonnée par l'antenne en question, toutes deux créant dans la direction privilégiée et à une même distance le même champ électromagnétique Tagairt Larousse électr., I, p. 432