Frékuénsi radio
![](http://upload.wikimedia.org/wikipedia/commons/thumb/8/83/Atmospheric_electromagnetic_transmittance_or_opacity.jpg/350px-Atmospheric_electromagnetic_transmittance_or_opacity.jpg)
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
[édit | édit sumber]- Pita III - 174–245 MHZ
- ISM band
Gelombang mikro (IEEE US)
[édit | édit sumber]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
[édit | édit sumber]Spéktrum éléktromagnétik
Gelombang radio | Gelombang mikro | Infrabeureum | Spéktrum cahaya katémbong | Ultraviolét | Sinar X | Sinar gamma |