Editing Radio frequency (section)

==Frequency bands==
{{main|Radio spectrum}}

The [[radio spectrum]] of frequencies is divided into bands with conventional names designated by the [[International Telecommunication Union]] (ITU):
:{| class="wikitable" style="text-align:right"
|-
! scope="col" rowspan="2" | [[Frequency range|Frequency<br />range]] !! scope="col" rowspan="2" | [[Wavelength]]<br />range !! scope="col" colspan="2" | [[ITU]] designation !! scope="col" rowspan="2" | [[Radio spectrum#IEEE|IEEE bands]]<ref name="IEEE Std 521" />
|-
! scope="col" | Full name
! scope="col" | Abbreviation<ref name="beasley">{{cite book|title=Modern Electronic Communication|year=2008|isbn=978-0132251136|author=Jeffrey S. Beasley|edition=9th|author2=Gary M. Miller |pages=4–5}}</ref>
|-
! scope="row" {{rh2|align=right}} | Below 3&nbsp;Hz
| >10<sup>5</sup>&nbsp;km || || style="text-align:center" | || {{n/a}}
|-
! scope="row" {{rh2|align=right}} | 3–30&nbsp;Hz
| 10<sup>5</sup>–10<sup>4</sup>&nbsp;km|| [[Extremely low frequency]] || style="text-align:center" | [[Extremely low frequency|ELF]] || {{n/a}}
|-
! scope="row" {{rh2|align=right}} | 30–300&nbsp;Hz
| 10<sup>4</sup>–10<sup>3</sup>&nbsp;km|| [[Super low frequency]] || style="text-align:center" | [[Super low frequency|SLF]] || {{n/a}}
|-
! scope="row" {{rh2|align=right}} | 300–3000&nbsp;Hz
|  10<sup>3</sup>–100&nbsp;km|| [[Ultra low frequency]] || style="text-align:center" | [[Ultra low frequency|ULF]] || {{n/a}}
|-
! scope="row" {{rh2|align=right}} | 3–30&nbsp;kHz
| 100–10&nbsp;km|| [[Very low frequency]] || style="text-align:center" | [[VLF]] || {{n/a}}
|-
! scope="row" {{rh2|align=right}} | 30–300&nbsp;kHz
| 10–1&nbsp;km|| [[Low frequency]] || style="text-align:center" | [[Low frequency|LF]] || {{n/a}}
|-
! scope="row" {{rh2|align=right}} | 300&nbsp;kHz – 3&nbsp;MHz
| 1&nbsp;km – 100 m|| [[Medium frequency]] || style="text-align:center" | [[Medium frequency|MF]] || {{n/a}}
|-
! scope="row" {{rh2|align=right}} | 3–30&nbsp;MHz
| 100–10&nbsp;m|| [[High frequency]] || style="text-align:center" | [[High frequency|HF]]  || style="text-align:center" | [[High frequency|HF]]
|-
! scope="row" {{rh2|align=right}} | 30–300&nbsp;MHz
| 10–1&nbsp;m|| [[Very high frequency]] || style="text-align:center" | [[VHF]] || style="text-align:center" | [[VHF]]
|-
! scope="row" {{rh2|align=right}} | 300&nbsp;MHz – 3&nbsp;GHz
| 1 m – 100&nbsp;mm|| [[Ultra high frequency]] || style="text-align:center" | [[UHF]] || style="text-align:center" | [[UHF]], [[L band|L]], [[S band|S]]
|-
! scope="row" {{rh2|align=right}} | 3–30&nbsp;GHz
| 100–10&nbsp;mm|| [[Super high frequency]] || style="text-align:center" | [[Super high frequency|SHF]] || style="text-align:center" | [[S band|S]], [[C band (IEEE)|C]], [[X band|X]], [[Ku band|Ku]], [[K band (IEEE)|K]], [[Ka band|Ka]]
|-
! scope="row" {{rh2|align=right}} | 30–300&nbsp;GHz
| 10–1&nbsp;mm|| [[Extremely high frequency]] || style="text-align:center" | [[Extremely high frequency|EHF]] || style="text-align:center" | [[Ka band|Ka]], [[V band|V]], [[W band|W]], [[Millimetre band|mm]]
|-
! scope="row" {{rh2|align=right}} | 300&nbsp;GHz – 3&nbsp;THz
|  1&nbsp;mm – 0.1&nbsp;mm|| [[Tremendously high frequency]] || style="text-align:center" | [[Tremendously high frequency|THF]] || {{n/a}}
|-
|[[File:Spectrum.pdf|Radio Spectrum Allocations in Canada|thumb|top|right]]
|[[File:International Telecommunication Union ITU.png|International Telecommunication Union ITU|thumb|top|right]]
|}



Frequencies of 1&nbsp;GHz and above are conventionally called [[microwave]],<ref name="Kumar">{{cite book
 | last1  = Kumar
 | first1 = Sanjay
 | last2  = Shukla
 | first2 = Saurabh
 | title  = Concepts and Applications of Microwave Engineering
 | publisher = PHI Learning Pvt. Ltd
 | date   = 2014
 | pages  = 3
 | url    = https://books.google.com/books?id=GY9eBAAAQBAJ&q=microwave&pg=PA3
 | isbn   = 978-8120349353
 }}</ref> while frequencies of 30&nbsp;GHz and above are designated [[millimeter wave]].
More detailed [[radio spectrum|band designations]] are given by the standard [[IEEE]] letter- band frequency designations<ref name="IEEE Std 521">[https://standards.ieee.org/ieee/521/768/ IEEE Std 521-2002 ''Standard Letter Designations for Radar-Frequency Bands''], [[Institute of Electrical and Electronics Engineers]], 2002. ([https://www.nap.edu/read/21774/chapter/10#235 Convenience copy] at National Academies Press.)</ref> and the  EU/NATO frequency designations.<ref name="BelovSmolskiy2012">{{cite book|author1=Leonid A. Belov|author2=Sergey M. Smolskiy|author3=Victor N. Kochemasov|title=Handbook of RF, Microwave, and Millimeter-Wave Components|url=https://books.google.com/books?id=bHhYjINB6KMC&pg=PA28|year=2012|publisher=Artech House|isbn=978-1-60807-209-5|pages=27–28}}</ref>