Abbreviation for programmable logic array.

A call that requires nothing more than basic call handling. [T1.667-1999]

Unencrypted information. [INFOSEC-99]
Note: Plain text includes voice. Synonym clear text.

An antenna in which all of the elements, both active and parasitic, are in one plane.
Note 1: A planar array provides a large aperture and may be used for directional beam control by varying the relative phase of each element.
Note 2: A planar array may be used with a reflecting screen behind the active plane.

Synonym slab-dielectric waveguide.

The constant of proportionality, represented by the symbol h, that relates the energy E of a photon with the frequency of the associated wave through the relation E = h, where h =
6. 626 × 10-34 joule•second.

The fundamental law of quantum theory that describes the essential concept of the quanta of electromagnetic energy.
Note 1: Planck's law states that the quantum of energy, E, associated with an electromagnetic field is given by E = h, where h is Planck's constant and is the frequency of the electromagnetic radiation.
Note 2: Planck's constant is usually given in… (Read More →)

A part of the intelligent network conceptual model. [T1.667-1999]

Synonym linear polarization.

1. A wave whose surfaces of constant phase are infinite parallel planes normal to the direction of propagation.
2. An electromagnetic wave that predominates in the far-field region of an antenna, and has a wavefront that is essentially in a plane.
Note: In free space, the characteristic impedance of a plane wave is 377 .