3.插入网络后 0- [S] 0 r==0 A=E+工b=b1《 a,=Tb,=0
3. 插入网络后 [S] Z L Z g AC g G L G a 1 b 2 b 1 a 2 a 1 = E + G g b 1 = E G = G = 0 g L a 2 = G L b 2 = 0
A0S4 b=Sua+S2a2=SuE n-e-)
î í ì = + = = + = b S a S a S E b S a S a S E 2 21 1 22 2 21 1 11 1 12 2 11 ( ) 2 2 21 2 2 2 2 1 1 2 1 P L = b - G L = S E
4.工作衰减 L.=10log -0o2sE美 -10log s. 1,=10og 1=-201ogS
4. 工作衰减 2 21 2 2 21 2 0 1 10log 2 1 2 1 10log 10log S S E E P P L L a = = = 21 2 21 20log 1 10log S S L a = = -