Modern Dictionary of Electronics, 7th Edition

Y

y Abbreviation for the prefix yocto-(10^–24).

Y Abbreviation for the prefix yotta-(10²⁴).

Y Symbol for admittance.

Yagi antenna Also called Yagi-Uda antenna. 1. An end-fire antenna that consists of a driven dipole (usually a folded dipole), a parasitic dipole reflector, and one or more parasitic dipole directors. All the elements usually lie in the same plane; however, the parasitic elements need not be coplanar, but can be distributed on both sides of the plane of symmetry. 2. Antenna system exhibiting directional properties, in which several elements may be mounted perpendicular to a common boom. One element is connected to the transmission line and the rest are parasitic radiators.

Yagi antenna.

YAG laser A solid-state laser using ...