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WIFI天线操作的反射损耗

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WIFI天线操作的反射损耗

发布日期:2016-08-25 00:00 来源:http://hbkfit.com 点击:

众享彩票  YONGLAIBIAOMINGZUKANGPIPEIQINGKUANGDEFANSHESUNHAO,DANWEIWEIdB。QISHUXUEBIAOMINGSHINENGGOUXIECHENG:

  Return Loss(RL)=-20log|r|(dB)

  其间Γ为WIFI天线输入端与收发机输出端之间的反射系数,亦能够WIFI天线输入阻抗Za与收发机输出阻抗Zt来表明之:

众享彩票  Γ=(Za-Zt)(Za+Zt)

众享彩票  YOU YISHANGLIANGSHIBIANKERONGYIDEZHIRL、ZaYUZtSANZHEZHIJIANDEGUANXI。JULILAISHUO,DANGWIFITIANXIANSHURUDUANDERLDAODA-10dBSHI,BIAOMINGYOUFASHEJISUOSONGRUWIFITIANXIANDENENGLIANGJIANGYOU10%HUIYINWEITIAN XIANYUFASHEJIZHIJIANDEZUKANGBUPIPEIERXINGCHENGNENGLIANGDIUSHI;JIADINGCIKEFASHEJIDESHUCHUZUKANGZtWEI50AOMU,ZEKEDEZHIWIFITIANXIANDESHURUZUKANGZaWEI96AOMU,YOUCIKEYANZHENGWIFITIANXIANYUFASHEJIZHI JIANDEZUKANGBINGBUPIPEI。

  CAOZUOPINLV(Operating Frequency)YUPINKUAN(Bandwidth, BW)

  WIFITIANXIANDECAOZUOPINLVXUHANGAIQUANBUTIXISUOKENENGSHIYONGDAODEPINDAI,ERQUANBUZUOYEPINDAIGUIMONEIDEZUIGAOCAOZUOPINLVfUYUZUIDICAOZUOPINLVfLJIANDECHAZHIJIWEIWIFITIANXIANDECAOZUOPINKUAN。YIBAN,WIFITIANXIANDEPINKUANJUXIDOUYIBAIFENBILAIBIAOMING:

  BW=(fU-fL)/fC×100%

众享彩票  QIJIAN,fCSHIJIDICAOZUOPINLV。YILANYAWEILI,QISUOSHI,GUWIFITIANXIANDEZUIXIAOCAOZUOPINKUANXUWEI83.5 MHz,YEJISHI3.4%。

  ZAILEJIELEWIFITIANXIANCAOZUOPINKUANDEJIESHUOHOU,HAIXUYAOZHIDAOZENMEJUEYIWIFITIANXIANDECAOZUOPINLVGUIMO。YIBANZUICHANGSHIYONGDESHIDIANYAZHUBOBI(VSWR)2:1DEBIAOZHUN,RUCIYILAIYOUYILIANCHUANVSWRXIAO YU2.0DEPINLVDIANSUOGOUCHENGDEPINLVGUIMOJIWEIWIFITIANXIANDECAOZUOPINKUAN。YIBANYONGLAIJUEYICAOZUOPINKUANDEBIAOZHUNSHIGENZHEBUYIYANGDETONGXUNTIXIERHUIYOUSUOQUBIE,LIRUVSWRXUXIAOYU1.5DEBIAOZHUN。 DANDUILANYALAISHUO,VSWRXIAOYU2.0DETIAOJIANXIANYINENGGOUQIHETIXISHANGDEXUYAO。


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