Paano Kalkulahin si Link Budget
Ano ang Link Budget?
Calculates wireless link margin comparing transmit power and gains against path loss and noise. Determines link reliability and range.
Pormula
Path loss = 20 log10(4πd×f/c)
Step-by-Step na Gabay
- 1Transmit power + antenna gain - cable loss - path loss + receive gain - noise figure = link margin
- 2Path loss = 20 log10(4πd×f/c)
- 3Positive margin = good signal; negative = insufficient range
- 4Typical 10-20 dB margin for reliability
Mga Nalutas na Halimbawa
Input
Tx 30dBm, path loss 100dB
Resulta
-70dBm rx
Mga Karaniwang Mali na Dapat Iwasan
- ✕Not accounting for cable losses (2-3 dB typical)
- ✕Using theoretical max power instead of regulated output
Mga madalas itanong
What's acceptable link margin?
Minimum 3 dB; 10+ dB good; 20+ dB excellent; accounts for fading and interference.
How do I improve link budget?
Increase transmit power, better antennas, lower frequency, shorter distance, or better receiver.
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