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無線區域網路天線概論 PowerPoint PPT Presentation


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無線區域網路天線概論. 第四章. 班級:電通四甲. 組員:李泓儀、賴世陽. 學號: N49413008 、 N49413012. 報告組別:第 16 組. 指導老師:江啟忠老師. 簡介. 無線通訊之所以能影響人類生活甚鉅 主要還是對於無線電波傳導應用的發掘與掌握 其中又以天線理論的應用最為顯著 無線通訊用的天線裝置應用非常廣泛 如、家用的收音機、行動電話甚至 電視台的發射站、軍用衛星等裝置. 4-1 無線電波常識. 電腦將數位資料通過匯流排傳給無線區域網路卡 經過基頻電路 (Base-Band) 調變至載波 (Carrier) 上成為類比訊號

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無線區域網路天線概論

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4062778

N49413008N49413012

16


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4-1

  • (Base-Band)(Carrier)

  • (Antenna)


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  • (Reflection)


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4-2


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(Focus)


4062778

  • (Connector)(Cable)

  • FCC

    Intentional Radiator

  • (EIRPEquivalent Isotropically Radiated Power)


4062778

IR

Intentional Radiator


Federal communications commission fcc

(Federal Communications CommissionFCC)

FCC


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FCC

6dbi3dbiIR30dbm3db

EIRP36dbm


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FCC

EIRP IR


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FCC

6dbi3dbiIR30dbm1db

IR30dbm


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4-3

  • SNR(Signal To-Noise Ratio)

  • SNR

  • (Omni-directional antenna)

  • (Directional antenna)


4062778

  • 360


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11


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  • N1SNR (S) L13

  • N2SNRL12


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  • 5075

  • VSWR(Return Loss)


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RF

  • LMR ()

  • LDF ()


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4-4

RF RF

N-TypeSMABNC

  • N-TypeRF

  • SMARF (SMBSMC)

  • BNC10Base2 (2.4G HzTNC12G Hz)


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N-Type SMARF


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RFAP


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Pigtail()


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(Vertical Polarization)


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4-4


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END!!


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