hf band (high-frequency band)
1High frequency — (HF) radio frequencies are between 3 and 30 MHz. Also known as the decameter band or decameter wave as the wavelengths range from one to ten decameters (ten to one hundred metres). Frequencies immediately below HF are denoted Medium frequency… …
2High Frequency Active Auroral Research Program — HAARP is often confused with Project HARP, the High Altitude Research Project (a joint project of The Pentagon and the Canadian Department of National Defence).The High Frequency Active Auroral Research Program (HAARP) is an investigation project …
3High frequency limit — The high frequency limit of hearing is the upper extent to which a particular animal can perceive sound. Perhaps the most commonly known aspect of the psychoacoustic model is that humans cannot hear frequencies above and below certain thresholds; …
4high-frequency band — aukštųjų dažnių diapazonas statusas T sritis automatika atitikmenys: angl. high frequency band vok. Hochfrequenzband, n; Hochfrequenzbereich, m rus. диапазон высоких частот, m pranc. bande des hautes fréquences, f; gamme des hautes fréquences, f …
5high-frequency (HF) bands — Any frequency above the audible range band P: 225 MHz 300 MHz; band J: 350 MHz 530 MHz; band L: 390 MHz 1550 MHz; band S: 1.55 GHz 5.20 GHz; band C: 3.90 GHz 6.20 GHz; band X: 5.20 GHz 10.90 GHz; band K: 10.90 GHz 36.00 GHz; band K: 15.35 GHz… …
6high frequency — The frequency band between 3 and 30 MHz. This normally is used for long range air to ground communications …
7high-frequency — (HF) Band of frequencies between 3 to 30 megahertz range …
8Ultra high frequency — (UHF) designates a range (band) of electromagnetic waves with frequencies between 300 MHz and 3 GHz (3,000 MHz). Also known as the decimeter band or decimeter wave as the wavelengths range from ten to one decimeters. Radio waves with frequencies… …
9Extremely high frequency — Frequency range 30 to 300 GHz ITU Radio Band Numbers 1 2 3 4 5 6 7 8 9 10 …
10Very high frequency — (VHF) is the radio frequency range from 30 MHz to 300 MHz. Frequencies immediately below VHF are denoted High frequency (HF), and the next higher frequencies are known as Ultra high frequency (UHF). The frequency allocation is done by ITU. Common …
