2-millimeter band

Amateur radio frequency band The 2-millimeter band is a portion of the EHF (microwave) radio spectrum internationally allocated to amateur radio and amateur satellite use. The band is between 134 GHz and 141 GHz. Due to the lack of commercial off the shelf radios, amateurs who operate on the 2 mm band must design and construct their own equipment, and those who do, often attempt to set communication distance records for the band. Allocation The International Telecommunication Union allocates 134 GHz to 141 GHz to amateur radio and amateur satellites. Amateurs operate on a primary basis between 134 GHz and 136 GHz and on a secondary basis in the rest of the band. As such, amateurs must protect the radio astronomy and radiolocation services from harmful interference, which share the band with amateurs between 136 GHz and 141 GHz. The ITU's allocations are the same in all three ITU Regions. List of notable frequencies 134.930 GHz Narrow band calling frequency History The allocation was introduced as a result of changes at ITU's World Radiocommunication Conference 2000. Prior to this the amateur allocation was 142-144 GHz Primary and 144-149 GHz Secondary. Distance records The first 2 mm distance record, and still standing longest distance achieved on the band, was set by US stations WA1ZMS and W4WWQ, who established contact at 114.4 km mi on February 26, 2006. The longest distance achieved on 2 mm in the United Kingdom was 35.6 km mi between stations G8ACE and G8KQW on January 16 2016. In Australia, the 2 mm distance record was 19 km mi set by stations VK3CV and VK3NH on June 11, 2020. See also Amateur radio frequency allocations References http://transition.fcc.gov/oet/spectrum/table/fcctable.pdf FCC Online Table of Frequency Allocations May 7, 2019 47 C.F.R. Federal Communications Commission August 7, 2019 http://www.iaru-r2.org/documents/explorer/files/Plan%20de%20bandas%20%7C%20Band-plan/R2%20Band%20Plan%202016.pdf IARU Region 2 Band Plan International Amateur Radio Union Region 2 16 October 14, 2016 http://www.iaru-r1.org/index.php/documents/func-download/580/chk,f9e4e4a0053473343dfd0d809805d442/no_html,1/ VHF Managers Handbook 7 International Amateur Radio Union Region 1 PDF 55 January 2015 October 27, 2015 June 17, 2018 https://web.archive.org/web/20180617050730/http://www.iaru-r1.org/index.php/documents/func-download/580/chk,f9e4e4a0053473343dfd0d809805d442/no_html,1 dead http://www.arrl.org/files/file/WA50-Standings/Distance_Records_21-May-2019.pdf Distance Records May 21, 2019 Amateur Radio Relay League August 2, 2019 https://www.microwavers.org/index.htm?records.htm Microwave Distance Records Day Peter Qaurmby John May 9, 2019 UK Microwave Group August 2, 2019 https://www.wia.org.au/members/records/data/documents/VHF%20Records%20210123.pdf Australian VHF - UHF Records January 23, 2021 Wireless Institute of Australia August 1, 2021 live August 1, 2021 https://web.archive.org/web/20210801025628/https://www.wia.org.au/members/records/data/documents/VHF%20Records%20210123.pdf External links UK Microwave Group's 134 GHz page First 134 GHz VUCC - Mount Greylock Expeditionary Force An Example of Gear for the 145GHz Amateur Band - Mount Greylock Expeditionary Force Category:Amateur radio bands