Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Extremely_high_frequency> ?p ?o }
- Extremely_high_frequency abstract "Extremely high frequency (EHF) is the ITU designation for the band of radio frequencies in the electromagnetic spectrum from 30 to 300 gigahertz, above which electromagnetic radiation is considered to be low (or far) infrared light, also referred to as terahertz radiation. Radio waves in this band have wavelengths from ten to one millimetre, giving it the name millimetre band or millimetre wave, sometimes abbreviated MMW or mmW. Millimetre length electromagnetic waves were first investigated in the 1890s by pioneering Indian scientist Jagadish Chandra Bose.Compared to lower bands, radio waves in this band have high atmospheric attenuation; they are absorbed by the gases in the atmosphere. Therefore, they have a short range and can only be used for terrestrial communication over about a kilometer. In particular, signals in the 57–64 GHz region are subject to a resonance of the oxygen molecule and are severely attenuated. Even over relatively short distances, rain fade is a serious problem, caused when absorption by rain reduces signal strength. In climates other than deserts absorption due to humidity also has an impact on propagation. While this absorption limits potential communications range, it also allows for smaller frequency reuse distances than lower frequencies. The short wavelength allows modest size antennas to have a small beam width, further increasing frequency reuse potential.".
- Extremely_high_frequency thumbnail Micrwavattrp.png?width=300.
- Extremely_high_frequency wikiPageExternalLink 47cfr15.255.htm.
- Extremely_high_frequency wikiPageExternalLink millimeterwave.
- Extremely_high_frequency wikiPageExternalLink oet70a.pdf.
- Extremely_high_frequency wikiPageExternalLink description.html.
- Extremely_high_frequency wikiPageExternalLink bands.html.
- Extremely_high_frequency wikiPageID "683672".
- Extremely_high_frequency wikiPageLength "16372".
- Extremely_high_frequency wikiPageOutDegree "80".
- Extremely_high_frequency wikiPageRevisionID "682700250".
- Extremely_high_frequency wikiPageWikiLink Absorption_(electromagnetic_radiation).
- Extremely_high_frequency wikiPageWikiLink Absorption_(optics).
- Extremely_high_frequency wikiPageWikiLink Active_Denial_System.
- Extremely_high_frequency wikiPageWikiLink Air_Force.
- Extremely_high_frequency wikiPageWikiLink Air_force.
- Extremely_high_frequency wikiPageWikiLink Amsterdam_Airport_Schiphol.
- Extremely_high_frequency wikiPageWikiLink Astronomy.
- Extremely_high_frequency wikiPageWikiLink Atacama_Large_Millimeter_Array.
- Extremely_high_frequency wikiPageWikiLink Atmosphere.
- Extremely_high_frequency wikiPageWikiLink Atmospheric.
- Extremely_high_frequency wikiPageWikiLink Attenuation.
- Extremely_high_frequency wikiPageWikiLink Attenuation_(electromagnetic_radiation).
- Extremely_high_frequency wikiPageWikiLink Band_(radio).
- Extremely_high_frequency wikiPageWikiLink Broadband_Internet_access.
- Extremely_high_frequency wikiPageWikiLink Category:Radio_spectrum.
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- Extremely_high_frequency wikiPageWikiLink Close-in_weapon_system.
- Extremely_high_frequency wikiPageWikiLink Diffraction.
- Extremely_high_frequency wikiPageWikiLink Diffuse_reflection.
- Extremely_high_frequency wikiPageWikiLink Doppler_effect.
- Extremely_high_frequency wikiPageWikiLink Doppler_shift.
- Extremely_high_frequency wikiPageWikiLink Electromagnetic_radiation.
- Extremely_high_frequency wikiPageWikiLink Electromagnetic_shielding.
- Extremely_high_frequency wikiPageWikiLink Electromagnetic_spectrum.
- Extremely_high_frequency wikiPageWikiLink Federal_Communications_Commission.
- Extremely_high_frequency wikiPageWikiLink Fire-control_radar.
- Extremely_high_frequency wikiPageWikiLink Frequency_reuse.
- Extremely_high_frequency wikiPageWikiLink Full_body_scanner.
- Extremely_high_frequency wikiPageWikiLink GHz.
- Extremely_high_frequency wikiPageWikiLink Gigabit.
- Extremely_high_frequency wikiPageWikiLink Gigahertz.
- Extremely_high_frequency wikiPageWikiLink Hertz.
- Extremely_high_frequency wikiPageWikiLink IEEE_802.11ad.
- Extremely_high_frequency wikiPageWikiLink ITU.
- Extremely_high_frequency wikiPageWikiLink Infrared.
- Extremely_high_frequency wikiPageWikiLink Intensity_(physics).
- Extremely_high_frequency wikiPageWikiLink International_Telecommunication_Union.
- Extremely_high_frequency wikiPageWikiLink International_Telecommunications_Union.
- Extremely_high_frequency wikiPageWikiLink Internet_access.
- Extremely_high_frequency wikiPageWikiLink Jagadish_Chandra_Bose.
- Extremely_high_frequency wikiPageWikiLink Jersey_City.
- Extremely_high_frequency wikiPageWikiLink Jersey_City,_New_Jersey.
- Extremely_high_frequency wikiPageWikiLink Journal_of_Infrared,_Millimeter,_and_Terahertz_Waves.
- Extremely_high_frequency wikiPageWikiLink K_band.
- Extremely_high_frequency wikiPageWikiLink Ka_band.
- Extremely_high_frequency wikiPageWikiLink Kitt_Peak.
- Extremely_high_frequency wikiPageWikiLink Knife-edge_effect.
- Extremely_high_frequency wikiPageWikiLink L_band.
- Extremely_high_frequency wikiPageWikiLink Las_Vegas.
- Extremely_high_frequency wikiPageWikiLink Las_Vegas,_Nevada.
- Extremely_high_frequency wikiPageWikiLink Light.
- Extremely_high_frequency wikiPageWikiLink Line-of-sight_propagation.
- Extremely_high_frequency wikiPageWikiLink M_band.
- Extremely_high_frequency wikiPageWikiLink Meter.
- Extremely_high_frequency wikiPageWikiLink Metre.
- Extremely_high_frequency wikiPageWikiLink Microwave.
- Extremely_high_frequency wikiPageWikiLink Millimeter_wave_scanner.
- Extremely_high_frequency wikiPageWikiLink Multipath_propagation.
- Extremely_high_frequency wikiPageWikiLink Near_space.
- Extremely_high_frequency wikiPageWikiLink Oxygen.
- Extremely_high_frequency wikiPageWikiLink Personal_area_network.
- Extremely_high_frequency wikiPageWikiLink Radar.
- Extremely_high_frequency wikiPageWikiLink Radio_astronomy.
- Extremely_high_frequency wikiPageWikiLink Radio_frequency.
- Extremely_high_frequency wikiPageWikiLink Radio_spectrum.
- Extremely_high_frequency wikiPageWikiLink Radio_wave.
- Extremely_high_frequency wikiPageWikiLink Rain.
- Extremely_high_frequency wikiPageWikiLink Rain_fade.
- Extremely_high_frequency wikiPageWikiLink Remote_sensing.
- Extremely_high_frequency wikiPageWikiLink Resonance.
- Extremely_high_frequency wikiPageWikiLink Schiphol_Airport.
- Extremely_high_frequency wikiPageWikiLink Security_scan.
- Extremely_high_frequency wikiPageWikiLink Signal_strength.
- Extremely_high_frequency wikiPageWikiLink Soviet_Union.
- Extremely_high_frequency wikiPageWikiLink Terahertz_radiation.
- Extremely_high_frequency wikiPageWikiLink Transportation_Security_Administration.
- Extremely_high_frequency wikiPageWikiLink Tulsa_International_Airport.
- Extremely_high_frequency wikiPageWikiLink Upper_atmosphere.
- Extremely_high_frequency wikiPageWikiLink V_band.
- Extremely_high_frequency wikiPageWikiLink W_band.
- Extremely_high_frequency wikiPageWikiLink Wavelength.
- Extremely_high_frequency wikiPageWikiLink Wi-Fi.
- Extremely_high_frequency wikiPageWikiLink WirelessHD.
- Extremely_high_frequency wikiPageWikiLink Wireless_Gigabit_Alliance.
- Extremely_high_frequency wikiPageWikiLink File:Micrwavattrp.png.
- Extremely_high_frequency wikiPageWikiLink File:Millimeter-wave_cloud_radar.jpg.
- Extremely_high_frequency wikiPageWikiLink File:Minsk_port_bow_AK-630_CIWS_gun_fire_control_radar.JPG.
- Extremely_high_frequency wikiPageWikiLink File:The_Atacama_Compact_Array.jpg.
- Extremely_high_frequency wikiPageWikiLinkText "(MMW)".