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Harry wrote: Hi Cecil, I find another formula in Balnais book (section 4.3, 1982 edition) for Rr: Rr = 20 * (pi)^2 * ( l / lamda)^2 (4-37) If l = lamda/2, then this formula gives Rr .=. 50 Ohms. (4-93) the one you quoted is Rr = (120*pi) / (4*pi) * Cin( 2*pi ) = 73 Ohms, (for l = lamda/2) where 120*pi is the intrinsic impedance for a free-space medium. Would you please explain the difference between these two formulas (4-37 and 4-93)? Thanks! -- Harry 4-37 should apparently read: Rr = 30 * (pi)^2 * (1 / lambda)^2. ac6xg |
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