Question

6) A 2 GHz ground-penetrating radar sends a signal into non-magnetic semi-dry soil that has 2.5 relative permittivity and 10-2 loss tangent. Find the distance the signal travels before: (a) its electric field amplitude is reduced by 20%, (b) its phase shifts by 180°, and (c) its average power density is reduced by 10%.

Answer 1

f = 2GHz Mas @ = 2:5 loss Tangent - Tanto = 10² TO 3x10 va Vouwbac orgwe) = wae (lil Eri)) = 25x2x0X525 ( VE1+105)) = 66231(15156€) = (0:318 +66231) m E, - FoxSD = 0.8 to. - q = Eiread s-ad=an (0.8) a) 100 0.702m d = 0.223 = 0.223 a 0.318 P 5) B = 66.23 sadlm. Güven Bd = 180° = 3.142.000 d = 3.142 = 10.047m | 66.23. c) P = Pioxao = 0.9 Pio PRE -2ad.is » -22d = ln(0-9) Pi = Pio e DO d=0:105 (0.166m 2x0:318