Frékuénsi radio

Rough plot of Earth's atmospheric transmittance (or opacity) to various wavelengths of electromagnetic radiation, including radio waves.

Frékuénsi radio nujul ka spéktrum éléktromagnétik di mana gelombang éléktromagnétik bisa dihasilkeun ku cara ngeupankeun arus bulak-balik ka hiji anteneu. Frékuénsi kawas kieu kaasup bagian tina spéktrum di handapeun ieu:

Ngaran pita	Singketan	pita ÉTA	Frékuénsi	Panjang gelombang
			< 3 Hz	> 100,000 km
Extremely low frequency	ELF	1	3–30 Hz	100,000 km – 10,000 km
Super low frequency	SLF	2	30–300 Hz	10,000 km – 1000 km
Ultra low frequency	ULF	3	300–3000 Hz	1000 km – 100 km
Very low frequency	VLF	4	3–30 khz	100 km – 10 km
Low frequency	LF	5	30–300 khz	10 km – 1 km
Medium frequency	MF	6	300–3000 khz	1 km – 100 m
High frequency	HF	7	3–30 MHZ	100 m – 10 m
Very high frequency	VHF	8	30–300 MHZ	10 m – 1 m
Ultra high frequency	UHF	9	300–3000 MHZ	1 m – 100 mm
Super high frequency	SHF	10	3–30 GHZ	100 mm – 10 mm
Extremely high frequency	EHF	11	30–300 GHZ	10 mm – 1 mm
			Di luhur 300 GHZ	< 1 mm

Catetan: di saluhureun 300 GHz, diserepna radiasi éléktromagnétik ku atmosfir Bumi kuat pisan sahingga atmosfir sacara éféktif jadi "henteu tembus" ku frékuénsi radiasi éléktromagnétik nu leuwih luhur, nepi ka atmosfir jadi transparan deui dina anu disebut wilayah frékuénsi infrabeureum jeung jandéla optik.

Pita ELF, SLF, ULF, sarta VLF patumpuk-tumpuk jeung spéktrum AF, kira-kira dina 20–20,000 Hz. Tapi, sora dikirimkeun ku komprési jeung mekarna hawa dina atmosfir, sarta lain ku énergi éléktromagnétik.

Pita frékuénsi anu ngabogaan ngaran

• Pita III - 174–245 MHZ
• ISM band

Gelombang mikro (IEEE US)

L band	1 to 2 GHZ
S band	2 to 4 GHZ
C band	4 to 8 GHZ
X band	8 to 12 GHZ
Ku band	12 to 18 GHZ
K band	18 to 26 GHZ
Ka band	26 to 40 GHZ
V band	40 to 75 GHZ
W band	75 to 111 GHZ

Tempo ogé

• Parambatan radio