RF Glossary: N | Terms Starting with N

Near Field — The region close to an antenna where the electromagnetic fields do not have a simple relationship between electric and magnetic components.

Noise Factor (F) — The ratio of the signal-to-noise ratio at the input to the signal-to-noise ratio at the output of a device. Noise Figure (NF) = 10 log10(F).

Noise Figure (NF) — The degradation in signal-to-noise ratio caused by a component or system, expressed in dB. Lower noise figure indicates better sensitivity.

Noise Floor — The minimum detectable signal level in a receiver, set by thermal noise, device noise, and measurement bandwidth.

Noise Temperature — A way of expressing noise power in terms of an equivalent temperature. T = (F-1) x 290K, where F is noise factor.

Notch Filter (Band Reject Filter) — A filter that attenuates a narrow band of frequencies while passing all others, used to suppress specific interference.

NF (Noise Figure) — See Noise Figure. Measured in dB, it is the key parameter for evaluating receiver front-end performance.

Need RF expertise?

Talk to Our Engineers

For technical questions or component specifications, our engineering team is here to help.

Get in Touch