F band (waveguide)

{{MWband

| name = Waveguide F band

| freq = 90 – 140 GHz

| wave = 3.33 – 2.14 mm

| bands = {{ublist|class=nowrap |W{{\}}mm (IEEE) |EHF (ITU)}}

}}

The waveguide F band is the range of radio frequencies from 90 GHz to 140 GHz in the electromagnetic spectrum,{{cite book|author=Victor L. Granatstein|title=Physical Principles of Wireless Communications, Second Edition|url=https://books.google.com/books?id=YClQiddGGfkC&pg=PA6|date=26 March 2012|publisher=CRC Press|isbn=978-1-4398-7897-2|page=6}}{{cite book|author=Jonathan Wells|title=Multigigabit Microwave and Millimeter-Wave Wireless Communications|url=https://books.google.com/books?id=0nwitcAjScoC&pg=PA4|year=2010|publisher=Artech House|isbn=978-1-60807-083-1|pages=4}} corresponding to the recommended frequency band of operation of WR8 waveguides. These frequencies are equivalent to wave lengths between 3.33 mm and 2.14 mm. The E band is in the EHF range of the radio spectrum.