Elektromágneses spektrum

A fény

 

A hullámsávok nemzetközi jelölésének magyarázata


ELF     

 

Extremely Low Frequency

ILF 

 

Infra Low Frequency

VLF

 

Very Low Frequency

LF

 

Low Frequency

MF

 

Medium Frequency

HF

 

High Frequency

VHF

 

Very High Frequency

UHF

 

Ulrta High Frequency

SHF

 

Super High Frequency

EHF

 

Extremely High Frequency

THF

 

Tremendously High Frequency

ISM sávok

The industrial, scientific and medical (ISM) radio bands were originally reserved internationally for the use of RF energy for industrial, scientific and medical purposes other than communications. In general, communications equipment must accept any interference generated by ISM equipment.
The ISM bands are defined by the ITU-R in 5.138, 5.150, and 5.280 of the Radio Regulations. Individual countries' use of the bands designated in these sections may differ due to variations in national radio regulations. Because communication devices using the ISM bands must tolerate any interference from ISM equipment, these bands are typically given over to uses intended for unlicensed operation, since unlicensed operation typically needs to be tolerant of interference from other devices anyway. In the United States of America, uses of the ISM bands are governed by Part 18 of the FCC rules, while Part 15 Subpart B contains the rules for unlicensed communication devices, even those that use the ISM frequencies.
The ISM bands defined by the ITU-R are:


Frequency range [Hz]

Center frequency [Hz]

Availability

6.765–6.795 MHz

6.780 MHz

Subject to local acceptance

13.553–13.567 MHz

13.560 MHz

 

26.957–27.283 MHz

27.120 MHz

 

40.66–40.70 MHz

40.68 MHz

 

433.05–434.79 MHz

433.92 MHz

 

902–928 MHz

915 MHz

Region 2 only

2.400–2.500 GHz

2.450 GHz

 

5.725–5.875 GHz

5.800 GHz

 

24–24.25 GHz

24.125 GHz

 

61–61.5 GHz

61.25 GHz

Subject to local acceptance

122–123 GHz

122.5 GHz

Subject to local acceptance

244–246 GHz

245 GHz

Subject to local acceptance

 

Kulcsszavak:

 

Kérdések: