资料介绍
斯密斯图介绍11A-1
Appendix 11A Smith Chart
2004
EMcom LAB, EE NCKU
11A-2
2004
EMcom LAB, EE NCKU
11A-3 R. Ludwig, RF Circuit Design: Theory & Applications (Ch 3, 8)
2004
EMcom LAB, EE NCKU
11A-4
z
Z- & Y-Smith Chart and Combined ZY- Smith Chart
z in = 1 + j1 = 2 e j( π/4) y in = ( z in )-1 =
1 e- j( π/4) 2 1 =1 j 2 2
2004
EMcom LAB, EE NCKU
11A-5
z
Impedance Effect of Series & Shunt L & C in Smith Chart
D
C B
zin=1 (Zin=50) => E
gA=50/31.25 =1.6 => A
Fig. 3-18 Computing of the normalized input impedance of the T network for a center frequency f = 2 GHz
2004 EMcom LAB, EE NCKU
11A-6
1. êpqPG
z p pó z ¨DX 1 AêpqPáA]qP Z-Smith chart ¤W§Ah|u
L ¤§°
jωL A G
constant- r circle °w ±à
§¤ ê-|W[ (p
A 2 )C
L -¤§èkG (¨ 1) Z L = RL + jX L = z L × Z 0 = (rL + jx L ) × Z 0 gLêpqP
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