天线基础_1.ppt

Slide Title,2006 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,Presentation_ID,*,Body Text,Second Level,Third Level,Fourth Level,Fifth Level,Segue and Q&A,Subtitle,2006 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,Presentation_ID,*,Slide Title,2006 Cisco Systems,Inc.All rights reserved.,Cisco Confidential,Presentation_ID,*,Body Text,Second Level,Third Level,Fourth Level,Fifth Level,天线基础,Xiaogang Wu,xiawu,思科无线产品天线,FCC requires that ALL antennas sold by a spread spectrum vendor be certified with the radio they are to be sold with,All Cisco Aironet-supplied cables,RF devices and antennas have reverse TNC(RP-TNC)connectors,Cisco Aironet-supplied antennas meet all FCC rules,Wide variety antennas for most applications,天线概念,Directionality,Omni(360degree coverage)directional,Directional(limited range of coverage),Gain,Measured in dBi and dBd.(0dBd=2.14dBi),More gain means more coverage-in certain directions,Polarization,Antennas are used in the vertical polarization,天线增益,In life you never get“something for nothing;”the same is true in antenna gain.,If the gain of an antenna goes up,the coverage area or angle goes down.,Coverage areas or radiation patterns are measured in degrees.,These angles are referred to as beamwidth,and have a horizontal and vertical measurement.,天线理论,isotropic,天线,A theoretical isotropic antenna has a perfect 360 degree vertical and horizontal beamwidth.,This is a reference for ALL antennas,Side View,(Vertical Pattern),Top View,(Horizontal Pattern),天线理论,-,Dipole,To obtain omni-directional gain from an isotropic antenna,the energy lobes are pushed in from the top and bottom,and forced out in a doughnut type pattern.,The higher the gain,the smaller the vertical beamwidth,and the larger the horizontal lobe area,This is the typical dipole pattern.Gain of a dipoleis 2.14dBi(0dBd),Side View,(Vertical Pattern),Top View,(Horizontal Pattern),New Pattern(with Gain),Vertical,Beamwidth,高增益全向天线,High gain,Omni-Directionals,High gain omni-directional antennas will create more coverage area in away from the antenna,but the energy level directly below the antenna will become lower.Coverage here may be poor.,Area of poor coverage directly under the antenna,Beamwidth,定向天线,Directional Antennas,For directional antennas the lobes are pushed in a certain direction,causing the energy to be condensed in a particular area.,Very little energy is in the back side of a directional antenna.,常用,2.4G AP,天线,RP-TNC,接口,2.4G,全向天线,AIR-ANT5959,2,dBi,Indoor,Divers.,Omni Ceiling Ant.w/RP-TNC Connect.,Left Antenna Patterns,Right,Antenna Patterns,2.4Ghz Omni-Directional Antennas,5.2dBi Indoor,Pillar Mount Diversity,Cisco Aironet Part#AIR-ANT3213,2.4G,定向天线AIR-ANT2410Y-R,10,dBi,Indoor/outdoor,Wall/Mast Mount YAGI,Yagi,with RP-TNC Connector,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,2.4Ghz Omni-Directional Antennas,5.2dBi Indoor,Ceiling Mount,Cisco Aironet Part#AIR-ANT1728,2.4Ghz,全向天线,AIR-ANT4941,2.2dBi Indoor,Dipole“Standard Rubber Duck”,Cisco Aironet Part#AIR-ANT4941,2.4G,全向天线,AIR-ANT2422DW-R,2.2,dBi,Indoor,White Dipole Antenna w/RP-TNC Connect,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,2.4G,定向天线,AIR-ANT2485P-R,8.5,dBi,Indoor/outdoor Wall Mount,Patch Antenna w/RP-TNC Connector,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,2.4G,定向天线,AIR-ANT2460P-R,6,dBi,Indoor/outdoor,Wall Mount Directional,Patch Antenna w/RP-TNC Connector,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,2.4G,定向天线,AIR-ANT2465P-R,6.5,dBi,Indoor/outdoor Wall Mount,Diversity Patch Antenna w/RPTNC Connectors,Left Antenna Patterns,Right,Antenna Patterns,常用,5G AP,天线,RP-TNC,接口,5G,全向天线,AIR-ANT5135D-R,3.5,Indoor,dBi,Dipole,omnidirectional,coverage,Black Dipole Antenna w/RP-TNC connector,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,5G,全向天线,AIR-ANT5135DW-R,3.5,dBi,Indoor,Dipole,omnidirectional,coverage,White Dipole Antenna w/RP-TNC Connect,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,5G,全向天线,AIR-ANT5145V-R,4.5,dBi,Indoor,Diversity,Omnidirectional,Diversity Omni w/RP-TNC connector,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,5G全向天线,AIR-ANT5160V-R,6,dBi,Indoor/outdoor,Omnidirectional,Omni Antenna w/RP-TNC connector,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,5G,定向天线,AIR-ANT5170P-R,7.0dBi Diversity Indoor/outdoor Patch Wall Mount,Diversity Patch Antenna w/RP-TNC connectors,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,5G,定向天线,AIR-ANT5195P-R,9.5,dBi,Indoor/outdoor,Patch Wall or Articulating Mast Mount,Patch Antenna w/RP-TNC connector,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,常用,2.4G,和,5G/5.8G AP,和网桥天线,N,接口,5G,全向天线,AIR-ANT5175V-N,7.5,dBi,outdoor,Omnidirectional,Omni with N Connector,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,2.4G,全向天线,AIR-ANT2455V-N,5.5,dBi,outdoor,Omnidirectional,Omni Ant.with N Connect,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,5.8G,全向天线,AIR-ANT58G9VOA-N,9 dBi,outdoor,MAST Mount,Omnidirectional,Omni Antenna,with N connector,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,5.8G,定向天线,AIR-ANT58G10SSA-N,9.5 outdoor,dBi,Mast Mount Sector,Mast Mount Sector,with N connector,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,5.8G,定向天线,AIR-ANT58G28SDA-N,28dBi,outdoor,Mast Mount Dish-5.8 GHz,Dish Antenna,with N connector,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,常用,2.4G,网桥天线,RP-TNC,接口,2.4Ghz Omni-Directional Antennas,5.2dBi,Outdoor,Mast Mount Vertical,Cisco Aironet Part#AIR-ANT2506,2.4G,全向天线,AIR-ANT24120,12,dBi,outdoor Mast,Mount,Omnidirectional,Omni Mast Mt.Antenna w/RP-TNC Connector,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,2.4G,定向天线,AIR-ANT2414S-R,14,dBi,outdoor,Mast Mount Sector,Sector Antenna w/RP-TNC Connector,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,2.4Ghz Directional Antennas,13.5dBi,outdoor,Yagi,Antenna 25 degree,Cisco Aironet Part#AIR-ANT1949,AIR-ANT3338,21,dBi,outdoor,Mast Mount Parabolic Dish,Solid Dish Antenna w/RP-TNC Connector,Azimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,AP,和网桥内置天线,Aironet,1310,内置,2.4G,定向天线,13,dBi,2 x 2 Patch ArrayAzimuth Plane Radiation Pattern,Elevation Plane Radiation Pattern,CISCO AIRONET 1130 SERIES INTEGRATED ANTENNA,2.4 GHz,3,dBi,Azimuth Plane Radiation Pattern,5 GHz,4.5,dBi,Azimuth Plane Radiation Pattern,2.4 GHz,3,dBi,Elevation Plane Radiation Pattern,5 GHz,4.5,dBi,Elevation Plane Radiation Pattern,Frequency Range,2.4-2.5GHz,5.15-5.8 GHz,Gain,2.4 GHz:3,dBi,5 GHz:4.5,dBi,Polarization,Linear,Vertical,Azimuth 3dB BW,Omnidirectional,Elevations 3dB BW,50 degrees,Antenna Connector,Integrated,Mounting,Integrated,Antenna Type,Omnidirectional,CISCO AIRONET 1000 SERIES INTEGRATED ANTENNA,2.4 GHz,6,dBi,Azimuth Plane Radiation Pattern,5 GHz,5,dBi,Azimuth Plane Radiation Pattern,2.4 GHz,6,dBi,Elevation Plane Radiation Pattern,5 GHz,5,dBi,Elevation Plane Radiation Pattern,Frequency Range,2.4-2.5GHz,5.15-5.8 GHz,Gain,2.4 GHz:6,dBi,5 GHz:5,dBi,Polarization,Linear,Vertical,Azimuth 3dB BW,2.4 GHz:70 degrees,5 GHz:55 degrees,Elevations 3dB BW,2.4 GHz:60 degrees,5 GHz:35 degrees,Antenna Connector,Integrated,Mounting,Integrated,Antenna Type,Bi-directional,网络资源,Cisco,Aironet,Antenna Reference Guide,GHz and 5 GHz Antennas and Accessories,Omni-Directional Antennas,2.2dBi Ceiling Mount,Cisco Aironet Part#AIR-ANT3194,2.4Ghz Directional Antennas,8.5dBi Patch Antenna 55 degree,Cisco Aironet Part#AIR-ANT3549,H Plane,E Plane,2.4Ghz Omni-Directional Antennas,5.2dBi Ground Plane,Cisco Aironet Part#AIR-ANT2561,2.4Ghz Omni-Directional Antennas,12dBi Omni Directional (Outdoor only),Cisco Aironet Part#AIR-ANT4121,2.4Ghz Directional Antennas,3dBi Patch Antenna 65 degree,Cisco Aironet Part#AIR-ANT3195,2.4Ghz Directional Antennas,6dBi Patch Antenna 65 degree,Cisco Aironet Part#AIR-ANT1729,