Wireless Concept

Kaidah dalam WirelessLAN

Kaidah Wireless :

• Tx Power – Daya Pancar signal wireless
• Rx Sensivity – Sesitifitas Menerima signal
• Looses – hambatan karena Kabel & Konektor
• EIRP – Daya pancar total beserta Antenna
• Free Space Loss (FSL) – Hambatan udara

Kaidah Wireless Outdoor :

• Line of Sight – Hambatan dan penghalang
• Freznel Zone – Media rambat Frequency
• Lengkung Bumi – Penghalang WLan jarak jauh

RX-Rate Calculation
Contoh Kasus :
– Access Point 100 mWatt
– tanpa booster
– kabel LMR400 100 feet
– antenna grid 24 db
– frekuensi 2,4 GHz
– jarak 10 km

Line of Sight
Aplikasi Wireless LAN di luar ruangan harus
memenuhi prinsip Line of Sight ..Wireless tidak dapat diakses jika terhalang oleh benda-benda yang berat,asap tebal/udara
Contoh :

• Pohon
• Gedung
• dll

 

 

Earth CurveOmni Directional

Untuk jarak yang cukup jauh, perencanaan
ketinggian antena/tower harus
memperhitungkan lengkung bumi.

Omni Directional Omni Directional  

Antena Height Calculator 

 

Antenna ConceptDirectionality

• Omnidirectional
• Directional (limited range of coverage)

Antenna Gain

• In db
• Higher db, longer distance coverage

Polarization

• Ussualy using vertical polarization
   

Omni Directional 
 

Flat Panel Antenna
 

Grid Antenna

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About Muhammad Syarifuddin

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