Link Budget Dan Wajan Calculator

  • December 2019
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Link Budget Buat ngitung kira-kira sampe nggak yach….

Syaratnya A & B bisa konek : RSL >= Rx Senv Rx Senv makin kecil makin bagus misal -83 s/d - 86 dBm (lihat spec-nya) Ptx nilainya 15 ~ 20 dBm (lihat spec-nya), tinggal pilih Antena Gtx dan Grx yg sesuai Koneknya akan stabil kalo SOM = 10 dB (biasanya) Frek Jarak Ptx (dBm) 18

SOM (dB) 8.68

2.44 GHz 9 Km Lst (dB) Gtx (dB) 0.5

14

Lfs (dB) 119.32

Lsr (dB) RSL Grx (dB) (dBm) 15

Tx

Ptx Lst Gtx Lfs

0.5

-73.32

Rx senv (dBm) -82

Rx

: Power Transmit (dBm) : Los Pigtail di Tx (dB) : Gain Antena Tx (dB) : Freespace Loss (dB)

Grx Lst RSL Rx senv SOM

: Gain antena Rx (dB) : Loss Pigtail di Rx (dB) : Receive Signal Level (dBm) : Receive sensitivity (dBm) : System Operating Margin

Design Antena Kaleng / Circular Waveguide Feeder

Buat ngitung posisi N-Connector / Wifi USB dari pantat feeder (kaleng, pipa PVC) 3/4 Lg

3/4 Lg

Lg/4

Lg/4 D

Wifi USB

PVC

USB - Male Connector (data) 3/4 Lg

AP / Client Bridge

Lg/4

Plastic Box L/4 N-Connector (RF In)

Freq. Wifi

f L L/4

Diameter Kaleng/Feeder D Lo (L/Lo)^2 1 - (L/Lo)^2

Posisi RF feed Panjang Kaleng/feeder Lg =

√ 1 - (L/Lo)2 Lg Lg/4 3/4 Lg L √ (1 - (L/Lo)2

2.44 GHz 123.1 mm 30.78 mm 88 mm 149.6 mm 0.68 0.32 0.57 216.64 mm 54.16 mm 162.48 mm

Masukkan diameter kaleng/P

er (kaleng, pipa PVC)

D

SB - Male Connector data)

D

Masukkan diameter kaleng/PVC

Parabolic Antena Buat ngitung jarak titik fokus dan Gain

f D

Feeder

d

WLAN

Effisiensi Frekuensi

0.5 (ambil 0.4 ~ 0.55, antena buatan pabrik pake 0.55) 2.4 GHz

D (m) d (m) 0.4 0.09 40 9 SET D d f G

f (m) G (dB) 0.11 17.04 11.11 <=== dalam cm

SET : Diameter : Kedalaman dari center : Jarak titik fokus dari center : Gain

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