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pacealik

pareri antena

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La frecvente mari, in general peste 100 Mhz propagarea undelor se face prin unda directa, extrem de rar prin reflexii. Prin urmare, indiferent de tipul antenei raza de bataie este "orizontul radio". Asta inseamna orizontul optic plus cam 15%, real depinde de frecventa si bineanteles de relief. Castigul antenei in acest caz ajuta la imunatatirea raportului semnal zgomot si destul de putin la marirea razei de lucru. Antena e excelenta, dar raza de acoperire depinde de ce "vezi" tu din pozitia pe care o ai.

Uite aici un program excelent pentru simulare- VOACAP Quick Guide: HF Propagation Prediction and Ionospheric Communications Analysis

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