华为内部有关天线的经典教程

,4111:..…...Blahblahblahblah1.3+45-45V/H(/)(+/-45)1.41.51.6()1000mW(1W)1mW10log(1000mW/1mW)=30dBAB3.57(HT+HR)()BARTRRO'HRHT“”.2.11/21/41/41/21/2800MHz200mm400MHz400mm2.4(),,850MHz1/2890MHz820MHz820MHz1/2~180mm,890MHz~170mm175mm~850MHz=890-820=70MHz2.5:“”“”44mW1mW=10log(4mW/1mW)=6dBd“”4mW“”8mW()“”,“”10log(8mW/1mW)=9dBd2.6dBddBidipoleisotropic“dBd”“dBi”:3dBd=5.17dBi2.17dB2.17dB2.7dB=10log25dB()()2.8120(eg)-10dB-10dB60(eg)-3dB-3dB15(eg)PeakPeak-3dBPeak-3dB32(eg)PeakPeak-10dBPeak-10dB3dB10dB2.9GdBdBG=32600/()aGadBβη9dBd90°180°360°0dBd3dBd6dBd2.10:10106+4dBddBi“dBd”“dBi”:3dBd=5.17dBidbddbi50ohms50ohms80ohms3.59.5W80ohms50ohms:10W:0.5W“”/2RL/2RL/2----++000ZltgjZltgjZZZZLLin++=ββ1/4“”4.187/8“5643PVC1GSM/CDMAφ50~114mm297CDMA10~1527/81/2333M2228PVC3M33+47/8CDMA57/81517/87/8678CDMA91/22~37/16DINN1012117/8⌫151⌫