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Understanding the Smith Chart in Electromagnetics

Smith Chart 0.12 1 0.38 0.13 0.11 0.14 0.37 0.39 0.36 0.4 100 90 80 0.41 110 a 5 0.9 1.0 0.08 1.2 0.8 0.42 Do 0.7 0.07 0.6 0.43 65 130 0.15 0.35 0.16 70 0.34 0.17 1.4 60 0.33 1.6 0.18 1.8 30 0.2 0.32 50 2.0 0.06 0.44 0.31 140 0.05 045 0.4 67 0,3 % 30 0.6 INDUCTIVE REACTANCE COMPONENT(+/ Zo), OR CAPACI 0.46 150 0.29 08 115 ~4.01 1.0 0.47 160 1.0 .21 4 80 0.0 -> WAVELENGTHS TOWARD GENERATOR-> 0.04 1 0.48 01 of 0.28 0.2 170 0.4 10 0.49 0.26 +++- £ 180 +++ 0.2 RESISTANCE COMPONENT (R/Zo), OR CONDUCTANCE COMPONENT (G/Yo) 0.2 1.4 1.6 ANGLE OF TRANSMISSION COEFFICIENT IN DEGREES ANGLE OF REFLECTION COEFFICIENTIN DEGREES 0.25 0.25 ++ + 1 0.49 0.24 0.4 -170 10 < WAVELENGTHS TOWARD LOAD <- 10.6 0.48 0.23 -160 1 Jutt 1.0 0.22 0.2 ONENT (jX/Zo), OR NDUCTI VESU SCEPTA NCE (-B/YO) 0.04 0.3 0.46 -80 -15 4.0 0.21 0.05 70 0.45 174 OFT- 0.4 0.06 MP 0.44 2.0 OST- -65 20'0 0.19 os- 1 0.2 0.6 0.43 0.18 30/1.8 1.6 0.08 0.42 18 1.4 0.17 0.8 3 0.9 1.2 60'0 1.0 OLT- 02- 0.16 0.41 0.1 09- 0.15 06- 0.4 0.11 0.14 0.12 ).13 .39 99-0 0.38 0.37 RADIALLY SCALED PARAMETERS SWR Do 10040 20 10 5 4 3 2.5 2 1.8 1.6 1.2 1.1 1 RTN. LOSS [dB] dBS RFL. COEFF, P 0 RFL. COEFF, E or I co 40 30 20 15 10 00 1 1.4 15 10 7 6 5 4 3 2 1 1 1 TOWARD LOAD-> 5 4 1.1 1.2 1.3 1.4 1.6 1.8 2 3 <- TOWARD GENERATOR 2 1 3 4 5 10 20 00 ATTEN. [dB] S.W. LOSS COEFF RFL. LOSS [dB] S.W. PEAK (CONST. P) 2 3 4 5 6 7 8 9 10 12 1 20 300 0 0.1 0.2 0.4 0.6 0.8 1 1.5 2 3 4 5 6 10 150% TRANSM. COEFF, P 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 1 0.9 0.8 0.7 0.6 0.5 0.4 0.1 0.05 0.01 0 0 1.1 0.3 0.2 0.1 0 1 0.9 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 2.5 3 4 5 10 00 0.95 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 TRANSM. COEFF, E or I 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 CENTER 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 ORIGIN