Friis Transmission Equation, Pr = Pt * Gt * Gr * (c / (4*pi*d*f))^2
Pr = ±µ¦¬¤Ñ½u¥i¥Î¿é¥X¥\²v
Pt = µo®g¤Ñ½u¿ç®g¥\²v
Gt = µo®g¤Ñ½u¼W¯q
Gr = ±µ¦¬¤Ñ½u¼W¯q
c = ¥ú³t
d = ¶ZÂ÷
f = ÀW²v
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