Terms starting with ‘N’

N

Near-field Region

Generally refers to the distance an antenna is being measured from. These areas are generally determined by the size of the wave. The distance of one wavelength is generally referred to as “near-field” while two wavelengths is generally referred…

Noise

Any unwanted and unmodulated energy that is always present to some extent within any signal.

Normalized Pattern

Normalizing the power / field with respect to its maximum value yields a normalized power / field pattern with a maximum value of unity (or 0 dB).

Null

Any area of the antenna which does not emit signal is considered a null or blind area.

Null Filling

The process to fill the nulls in the antenna radiation pattern to avoid blind spots in a coverage area.