Difference between revisions of "Radiasi Daya Pancar"

From OnnoWiki
Jump to navigation Jump to search
Line 56: Line 56:
  
 
* [[Konsep Dasar Radio]]
 
* [[Konsep Dasar Radio]]
 +
** [[Frekuensi]]
 +
** [[Panjang Gelombang]]
 +
** [[Daya Pemancar]]
 +
** [[Sensitivitas Penerima Radio]]
 +
** [[Penguatan Antenna]]
 +
** [[Redaman]]
 +
** [[Radiasi Daya Pancar]]
 +
** [[Propagasi di Udara (Free Space)]]
 +
** [[Line of Sight]]
 +
** [[Direct Sequence Spread Spectrum (DSSS)]]
 +
** [[Frequency Hopping Spread Spectrum (FHSS)]]
 +
** [[Protokol IEEE 802.11]]

Revision as of 09:21, 28 January 2010

Pemerintah maupun konsensus komunitas kemungkinan besar akan menentukan batasan-batasan maksimum dari daya yang boleh di pancarkan dari antenna. Daya yang dipancarkan dari antenna dapat di ukur dengan dua (2) cara yaitu:

Effective Isotropic Radiated Power (EIRP) dalam dBm
=  daya di input antenna [dBm] + penguatan antenna [dBi]
Effective Radiated Power (ERP) dalam dBm
=  daya di input antenna [dBm] + penguatan antenna [dBd]

Effective Isotropic Radiated Power (EIRP) biasanya kita gunakan. Kita biasanya membatasi EIRP sekitar 36dBm.

Batas Legal

Batas EIRP yang legal pada frekeunsi 2.4GHz di Indonesia adalah:

Contoh perhitungan daya Effective Isotropic Radiated Power (EIRP)

TX Power Power Gain / Loss Power Antenna gain EIRP Legal? (Yes / No)
1 Watt (+30 dBm) -1 dB loss via 1 m coax + 29 dBm +6 dBi +35 dBm Yes
100 mW (+20 dBm) +14 dB Amplifier +34 dBm +8 dBi +42 dBm No
25 mW (+14 dBm) +14 dB Amplifier +28 dBm +8 dBi +36 dBm Yes

Pranala Menarik