Jinsi ya kukokotoa Link Budget
Link Budget ni nini?
Calculates wireless link margin comparing transmit power and gains against path loss and noise. Determines link reliability and range.
Fomula
Path loss = 20 log10(4πd×f/c)
Mwongozo wa Hatua kwa Hatua
- 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
Mifano Iliyotatuliwa
Ingizo
Tx 30dBm, path loss 100dB
Matokeo
-70dBm rx
Makosa ya Kawaida ya Kuepuka
- ✕Not accounting for cable losses (2-3 dB typical)
- ✕Using theoretical max power instead of regulated output
Maswali yanayoulizwa mara kwa mara
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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