:
.
....2
1. .2
1.1. 腅....2
1.1.1. 腅.2
1.1.2. х...3
1.1.3. х.....5
1.2. х..7
1.2.1 .7
1.2.2 ........9
2. 酅.12
3. .22
4. ..23
5. ...23
.
, .
.
.
.
. . , . ( 70 1 ), .
( <16 , 16 )
 |
( ) ( <1 , 1 ).
( )
 |
, . 50 (Ethernet), 75 (TV), 93 (Arnet). ( Ethernet) 50 200 . 50 200 . 30 000 ( 100 000 ).
.
- 105
, - 106
( ) - 107
- 108
- 109
- 1010
- 1011
- 1014
-() - WAC (jw)). ..
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WAC(jw) = exp(-k(jw)*x) =Ux /U,
k(jw) - ;
- ;
.
U - ;
.
U - .
K(jw) = a(w)+b(w),
a(w) - ();
b(w) - .
. , - ( -) .
r = 10 log(Px / P) [] - ;
r = 20 log(Ux / U) []- ,
rT = 20 log(Ix / I) []- .
, e, . : 1 = 0,115, 1 = 8,686 .
P =1,
U = 
, I = 
, . R =600 , U = 
=0,775 , I =1,29 .
, 0 . P, Ux, Ix :
P = P*100,1r, Ux = Ux *100,05r.
= 10 log(P / Px) .
= r - r = 10 log(P / P),
= 20 log(U / U), [],
= ln (U / U), [].
:
W(jw) = exp[ - (a(w) + jb(w))*x] = exp(- a(w)*x) * exp(- jb(w)*x).
|
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U = U * exp(- a(w)*x) * exp(- jb(w)*x).
U = U * exp(- a(w)*x) à U / U = exp(a(w)*x) à a =a(w)*x;
U = U * exp(- a(w)*x) * exp(- jb(w)*x).
U = U * exp(- a(w)*x) à U / U = exp(a(w)*x) à a =a(w)*x;
a - .
1.1.3. .
, , .. , , . , .
 |
(), .
.
K(jw) = a(w)+b(w) = 
(1),
R - , [ / ];
L - , [ / ];
- , [ / ];
G - ,[ / ].
:
a(w) = 
;
b(w) = 
.
.
* w=0
a = 
, b =0.
* ( ) wL<<R, wC<<G.
|
|
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a = 
= b = .
* wL>>R, wC>>G.
(1) :
a = R/2 
+ G/2 
, [ / ], b = w 
,
(C/L) - ; (L/C) - .
, .
Z =U / I = - U / I =
- , -
w=0, Z = 
w à ¥, Z = .
|
(R 
Z) .
r = (R - Z) / (R + Z),
R - .
R,L,C,G ?
.
.
- ,
.
|
. ( ) , , , .. , ( , , .).
, , - , .
. , , , , , , ..
, , . , .
, , . . . , , D, (
>>D).
G - (G 
- ) (
, 
- , - , tg 
- ).
