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8/13/2019 Ky Thuat Sieu Cao Tan (Slide GT Hay)
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K THUT SIU CAO TN(Microwave Engineering)S
tit : 42 ; LT:28; BT:14
Kim tra: 30% Kim tra vit
gia k
(60')
Bi tp: 20%Bi tp nh
Thi cui k: 50% Thi vit
cui k
(90')
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Ni dung mn hc:
Gii thiu v
k
thut phn tch mch in
tn s
siu cao, khi nim
thng s
phn b
v
ma trn tn x
ca cc phn t
mch in, mt s
mch siu cao tn cbn.Ni dung mn hc gm 3 chng chnh nhsau:
Chng 1: Gii thiu khi nim ng dy truyn sng, h
s
phn x,
h
s
sng ng, tr
khng ng dy.
Chng 2: Cu trc v
ng dng ca
th
Smith trong phn tch v
thit k mch siu cao tn.
Chng 3: Ma trn tn x, cc c tnh v
ng dng.
Sinh vin cn c th tm hiu nhiu khi nim su hn v cc mchchuyn dng siu cao tn mn hc tip theo:Mn Mch siu cao tn.
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Ti liu
Gio trnh:
Vnh Thnh, L thuyt cs
k
thut siu cao tn, NXB KHKT,
1997
Ti liu tham kho:
Devendra K. Misra, Radio Frequency and Microwave Communication
Circuits analysis and design, John Wiley & Sons, 2001
Guilermo Gonzalez, Microwave transistor amplifier analysis and
design, prentice Hall, 1984
Samuel Y. Liao, Microwave Circuits and Devices, Prentice Hall, 1987.
David M. Pozar, Microwave Engineering, Addison-Wesley PublishingCo., 1993.
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Cc di tn s
Theo IEEE Institute of Electrical and Electronics Engineers ngha l "Hc Vin k nghin v in T
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ng dng ca k thutsiu cao tn
Truyn thng
Qung b: TV, radio
H
thng di ng: GSM, CDMA, Wimax,
Thng tin v
tinh
GPS,
Radar
Gim st khng lu
Dn ng cho tn la
Cc lnh vc khc
Sy, nu nng
iu tr
bnh
Truyn dn nng lng Nghin cu thin vn
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Mch khuch i cng sut SCT
(s dng cp ng trc phi hp trkhng)
Mt s mch siu cao tn
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Mch khuch i cng sut SCT, s
dng cng ngh
vi di
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Mch khuch i SCT, s
dng dy chm vi di
phi hp tr
khng
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Circulator
Port1
Port2
Port3
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Circulator , tn hiu vo port 1
Port1
Port2
Port3
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Port1
Port2
Port3
Circulator , tn hiu vo port 3
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MMIC(Monolithic Microwave Integrated Circuits)
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B
xoay (dch) pha 6 bit
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Phn mm RFSim99 h
tr
thit k
mch RF, SCT
Phn mm
h tr thit k
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Phn mm CST Microwave studio
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Thit bo
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in trng trn dy song hnh (Parallel wire/ twin wire)
Mt sng truyn sng thc t
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Ttrng trn dy song hnh
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Cp ng trc (coaxial cable)
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in trng trn ng truyn vi di (microstrip line)
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Ttrng trn ng truyn vi di
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Coplanar waveguide
Strip line
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ng dn sng (waveguide)
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Mt v
d
Mch ghp vng
4
4
4
1 2
3 4
3
4
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1
ng Day Truyen SongHe So Phan Xa, Tr Khang ng DayHien Tng Song ng, He So Song ng
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2
I.
ng
Day Truyen Song
Phan Tch ng Day Truyen Song
V
f
=
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3
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4
Cac Thong So S Cap Cua ng Day Truyen Song
R (Ohm/m) : ien tr tuyen tnh, ac trng cho ien trthuan cua mot n v chieu dai day dan.
L (H/m) : ien cam tuyen tnh, ac trng cho ien camtng ng cua mot n v chieu dai ng truyen song.
C (F/m) : ien dung tuyen tnh, ac trng cho ien dungtren mot n v chieu dai ng truyen song.
G (S/m) : ien dan tuyen tnh, ac trng ien dan thuan
cua lp ien moi tren mot n v dai ng truyen song.
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5
1) Phng Trnh Truyen Song
T
nh luat Kirchoff ve
ien ap:( , )
( , ) ( , ) . . ( , ) . . i x t
v x t v x x t R x i x t L xt
= + + +
T nh luat Kirchoff ve dong ien: ( , )( , ) ( , ) . . ( , ) . .
v x x t i x t i x x t G x v x x t C x
t
+ = + + + +
( )i
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6
( , )( , ) ( , ) . . ( , ) . .
( , )( , ) ( , ) . . ( , ) . .
i x tv x t v x x t R x i x t L x
t
v x x t i x t i x x t G x v x x t C x
t
= + + +
+ = + + + +
( , ) ( , ) ( ). . ( , )
( , ) ( , ) ( ). . ( , )
V x V x x R j L x I x
I x I x x G j C x V x x
= + + +
= + + + +
Chuyen sang mien tan so:
( , ) ( , )( ). ( , )
( , ) ( , )( ). ( , )
V x x V xR j L I x
xI x x I x
G j C V x xx
+ = +
+ = + +
Suy ra:
( ) ( )V x x V x +
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7
( , ) ( , )( ). ( , )
( , ) ( , ) ( ). ( , )
V x x V xR j L I x
x
I x x I x G j C V x xx
+ = +
+
= + +
Khi: 0x
( , )( ). ( , )
( , ) ( ). ( , )
V xR j L I x
x
I x G j C V xx
= +
= +
2
2
2
2
( , )
( )( ). ( , )
( , )( )( ). ( , )
V x
R j L G j C V xx
I xR j L G j C I x
x
= + +
= + +
2 ( )V x
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8
at: ( ) ( )( )R j L G j C = + +
2
2
2
( , )( )( ). ( , )
( , ) ( )( ). ( , )
V xR j L G j C V x
x
I x R j L G j C I xx
= + +
= + +
22
2
22
2
( , )( ). ( , )
( , )( ). ( , )
V xV x
xI x
I xx
=
=
Moi phng trnh co dang:1 2 1'' . ' . 0 , 0f a f a f a+ + = =
2) N hi C Ph T h T S
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9
2) Nghiem Cua Phng Trnh Truyen Song
22
2
( , )( ). ( , )
V xV x
x
=
( ). ( ).
( , ) . .
x x
V x V e V e
+ = +
Phng trnh:
Nghiem co
dang:
. .( ) . .x xV x V e V e + = +
j = +Vi:
. . . .( ) . . . .x j x x j xV x V e e V e e + = +
j j
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10
. . . .( ) . . . .x j x x j xV x V e e V e e + = +
. .
. .x j x
V e e
+
Xet thanh phan th
1:
Xet thanh phan th
2:. .
. .
x j x
V e e
(Song ti)
(Song phan xa)
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11
2 2
2
( , ) ( ). ( , )I x I xx
=
Phng trnh song dong ien:
Co nghiem: . .( ) . .x xI x I e I e + = +
0 0
,V V
I IZ Z
+ + = =
Quan he vi song ien ap:
. .
0 0
( ) x xV V
I x e eZ Z
+ =
3) C Th S Th C C D T S
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12
3) Cac Thong So
Th
Cap Cua ng Day Truyen Song
a) He So Truyen Song:( ) ( ) ( ) ( )( )j R j L G j C = + = + +
b) He So Suy Hao: [ ]( ) , /Np m [ ]( ) , /dB m [ / ]
[ / ] 10 10 [ / ]
[ / ]
20.log (20log ).
8,68.
Np m
dB m Np m
Np m
e e
= =
=
V
du:Mot ng truyen song co
he
so
suy hao la1 Np/m, tc la khi song lan truyen qua 1 mchieu dai ng truyen song th
bien o
seb suy hao 8,68 dB (2,7 lan).
[ ] [ ]
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13
c) He
So
Pha: [ ] [ ]( ) , / , /rad m m o
The hien o thay oi pha cua song khi song lan truyentren mot n v chieu dai ng truyen song.Quan he gia he so pha va bc song:2
=
* Trng Hp ng Truyen Khong Ton Hao:0, 0
( ) ( )( )
( ) 0
( )
R G
R j L G j C j LC
LC
= =
= + + =
=
=
d) Tr Khang ac Tnh ( Z ) :
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14
d) Tr
Khang ac Tnh ( Z0 ) :
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15
at:
0 0
1//Z Z x Z
Y x
= +
,Z R j L Y G j C = + = +
Khi: 0x 0Z R j L
ZY G j C
+ = =
+
ng truyen khong ton hao: [ ]0 0 ,L
Z RC
= =
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16
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17
e) Van Toc Truyen Song (Van toc pha):
La
quang ng song lan truyentrong moi n v thi gian.
[ / ], [ / ]
[ / ]
rad sV m s
rad m
= =
EX 3.2 P66, EX 3.3 P67
II. He SoPhan Xa,Tr Khang ng Day
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18
. .( ) . .x xV x V e V e + = +
a) He
So
Phan Xa
ien Ap:
=song phan xa
( )song ti
x
+ +
= = 2( )x
x
V x
V e Vx e
V e V
1) He
So
Phan Xa
b) He So Phan Xa Dong ien
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19
b) He
So
Phan Xa
Dong ien
2 20
0
( ) ( )
x
x xI Vx
V
ZI e Ix e e xVI e I
Z
++ +
= = = =
. .( ) . .x xI x I e I e + = +
. .
0 0
( ) x xV V
I x e e
Z Z
+ =
Thong thng ch quan tam ti he so phan xa
ien ap, quy uc: V =
c) S Phan Xa Cong Suat
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20
( )( ). .. . ,x xP V e I e + +=ti ( )( ). .. .x xP V e I e =phan xa( ) ( ). . . .. . . .x x x xP V e V e I e I e + + = + +t
( ) ( ). .. 1 ( ) . 1 ( )x xV IP V e x I e x + + = + + t
( )2 21 ( ) ( )V VP
P P x P P x= =
phan xa
t ti ti ti
c) S
a a
Co g Suat
d) Tnh He SoPhan Xa Tai mot iem bat kyTh Q H S h X T i T i
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21
Tai tai: 2( ) lVV
l eV
+
=
Tai iem ( ) :x l d= 2 2 ( )
2 2 2
( )
. ( ).
x l dV
l d d
V
V Vx e eV V
V
e e l eV
+ +
+
= =
= =
Thong Qua He
So
phan Xa
Tai Tai:
2( ) ( ) dV Vx l e =
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22
( ) ( ).V Vx l e
Vi: j = +2 2( ) ( ). .d j dV Vx l e e
=
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23
2 2( ) ( ). .d j d
V V
x l e e =
Khi dich chuyen ve
pha nguon mot oanVector se xoay mot goc bao nhieu?
/ 2d =
V
2
=
2 22 2 2 2
2d d
= = =
) H S Ph X T i T i
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24
e) He
So
Phan Xa
Tai Tai:
. .( ) . .l lV l V e V e + = +
. .
0 0
( ) l lV VI l e eZ Z
+ =
. .( ) . .l lV l V e V e + = +
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25
. .
0 0( )
l lV V
I l e eZ Z
+
=
0
( )
( )
l l
L l l
V e V eV l
Z ZI l V e V e
+
+
+= =
0 0
1
1 ( )1 ( )
1
l
l
L l
l
V e
V e lZ Z ZV e l
V e
+
+
+
+ = =
0
0
( ) L
L
Z Zl
Z Z
=
+
f) Mot SoTrng Hp ac Biet:
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26
Trng hp tai phoi hp tr khang:
0
0( ) 0
L
L
Z Z
l Z Z
= =
+2( ) ( ). 0 ,dx l e x = =
Khong co song phan xaTr
khang ac tnh chuan: 50 , 75 , 300 , 600
Trng hp tai noi tat:
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27
0
0
( ) 1L
L
Z Zl
Z Z
= =
+Phan xa
toan bo
( )
l
l ll
V el V e V e
V e
+
+ = =
Tai tai, song ti va
song phan xa
ngc pha nhau ( ) 0V l =
Trng hp tai H mach:
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28
0
0
( ) 1 ( ) 1LI
L
Z Zl l
Z Z
= = =
+
Phan xa
toan bo
( ) 0
l l
I e I e I l
+ = =
Tai tai, song dong ien ti va
phan xa
triet tieu nhau
Trng hp tai Thuan khang:
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29
0
0
( ) L
L
jX Rl
jX R
=
+Phan xa
toan bo
( ) 1l =
2) Tr Khang ng Day
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30
= ( )( ) ( )V xZ x I x
. .( ) . . (1)x xV x V e V e + = +
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31
. .
0 0
( ) (2)x xV VI x e eZ Z
+ =
. .
0 . .
. .
( ) . .
x x
x
V e V e
Z x Z V e V e
+
+
+
=
Tai Tai:
. .. ( ) ( ) . .l lL
Z I l V l V e V e
+ = = +
( )( )
( )L
V lZ l Z
I l
= =
T
(2) ta co: . .0. ( ) . .
x x
Z I x V e V e
+ =
. .
0. ( ) . .l lZ I l V e V e
+ =
. .. ( ) . .l lLZ I l V e V e
+ = +
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32
. .0
( )
. ( ) . .
L
l lZ I l V e V e
+
+
=
.
0
.
0
( )( )
2( )
( )2
l
L
l
L
I lV Z Z e
I lV Z Z e
+
= +
=
. .
0 . .
. .( )
. .
x x
x x
V e V eZ x Z
V e V e
+
+
+=
Thay vao :
( ) ( )0 0
0 ( ) ( )
0 0
( ) ( )( )
( ) ( )
l x l xL L
l x l x
L L
Z Z e Z Z eZ x Z
Z Z e Z Z e
+ + =+
Ta co: = ( )d l x
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33
00
0
( ) ( )( )( ) ( )
d d d d
Ld d d d
L
Z e e Z e eZ x ZZ e e Z e e
+ + = + +
Ap dung:
+ = =( ) , ( )2 2
u u u ue e e ech u sh u
00
0
. ( ) . ( )( )
. ( ) . ( )
L
L
Z ch d Z sh dZ x Z
Z sh d Z ch d
+ =
+
= =
+
( )( )
( )
u u
u u
sh u e eth u
ch u e eVa:
00
0
. ( )( )
. ( )
L
L
Z Z th dZ x Z
Z Z th d
+ =
+
Trng hp ng day khong ton hao:
j
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34
=
= 0 0 , So thcj
Z R
Khi o:
= = +( ) ( )
j d j d
d j d
e e
th d th j d e e
Ap dung: = +cos( ) sin( )jue u j u
= =
2 sin( )( ) . ( )
2 cos( )j d
th j d j tg d d
00
0
. . ( )( )
. . ( )
L
L
Z j R tg dZ x R
R j Z tg d
+ =+
Mot So Trng Hp ac Biet:
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35
Trng hp tai phoi hp tr
khang
= 0 , So thcLZ R
00 0
0
. . ( )( ) ,
. . ( )
L
L
Z j R tg dZ x R R d x
R j Z tg d
+ = =
+hoac
Trng hp tai noi tat:
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36
g p
= 0LZ
0
0 00
. . ( )
( ) . . ( ). . ( )
L
L
Z j R tg d
Z x R j R tg dR j Z tg d
+ = =
+
( ) . ( ) ,Z x j X d = thuan khang
0( ) . . ( ) . ( ) ,Z x j R tg d j X d= = thuan khang
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37
Noi tat
H
Mach
ng dung ng day truyen song e
thay the
cac phan tien cam, ien dung (
1 tan so
nhat nh)
Trng hp tai h mach:
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38
= LZ0 0
00
0
. . ( )
( ) . . ( ) . ( )
. .cotg( )
L
L
Z j R tg d R
Z x R R j Z tg d j tg d
j R d
+ = =
+=
( ) . ( ) ,Z x j X d = thuan khang
0( ) . .cotg( ) . ( ) ,Z x j R d j X d= = thuan khang
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Noi tat
H
Mach
Trng hp tai Thuan khang:
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40
= .L LZ j X
0
0
0
. . ( )
( ) ,. ( )
L
L
jX j R tg d
Z x R R X tg d
+
= Thuan ao
( ) :Z x thuan khang
Xc nh tr
khng c tnh , tr
khng ti , v
h
s
truyn sng qua vic
o c thc t: p77, Ex 3.9
ng Truyen Mot phan t
bc song
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41
4l
=
inZ
0R LZ
0L inZ Z=
Neu tai h mach:
20
in
L
RZ
Z =
0L inZ Z =
Neu tai ngan mach:
ng dung lam mach bien oi tr
khang
2
0in
L
RZZ
= 0 .L inR Z Z =
00
0
. . (
)(0)
. . ( )
L
L
Z j R tg lZ R
R j Z tg l
+=
+T:
Ex 3.5 p71
ng Truyen Na bc song
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42
2l =
inZ
0Z LZ
in LZ Z=
3) Quan he gia tr khang ng day va he sophan xa:
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43
.
. . .
0 0 .. .
.
.1
. . .( )
.. . 1.
x
x x x
xx x
x
V e
V e V e V eZ x Z Z
V eV e V eV e
+ +
+ +
++
= =
0
1 ( )
( ) 1 ( )
x
Z x Z x
+
=
0
0
( )( ) ( )
Z x Zx Z x Z
= +
Ex: 3.11 p78, (cch 2 p80)
4) Dan Nap ng Day:1
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44
= = +
1( ) ( ) ( )( )Y x G x jB xZ x
00
0
. ( )( )
. ( )
L
L
Z Z th dZ x Z
Z Z th d
+=
+
T:
0
0 0
. ( )1( ) .
. ( )
L
L
Z Z th dY x
Z Z Z th d
+ =
+0
0
0
1/ 1/ . ( )( ) .
1/ 1/ . ( )
L
L
Y Y th d Y x Y
Y Y th d
+ =
+
00
0
. ( )( ) .
. ( )
L
L
Y Y th d Y x Y
Y Y th d
+ =
+
5) Tr Khang Chuan Hoa, Dan Nap Chuan Hoa
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45
0
( )( )
Z xz x
Z=
Tr khang chuan hoa:
Dan nap chuan hoa:
0
( )( )
Y xy x
Y=
III. Hien Tng Song ng, He So Song ng1) Hien Tng Song ng
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46
1) Hien Tng Song ng
Song ti va
song phan xa
giao thoa tao ra caciem bung song va nut song.
t = 0t = T/8t = T/4t = 3T/8t = T/2
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47
x
xSongTong
Song ti,song phan xa
2
4
MaxV
MinV
2) He
So
Song ng
Ap dung oi vi ng day khong ton hao
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48
Max
Min
VS VSWR
V= =
( ) . .j x j x
V x V e V e
+ = +Ta co:
MinV = Bien o song ti bien o song phan xa
,Max MinV V V V V V + + = + =
1
1S
+ =
V V V V S
V V V V
+ + +
+ + +
+ + = =
MaxV = +Bien o song ti bien o song phan xa
Ex. 3.13 p86
Bung ien ap ~ Nut dong ien
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49
~Max MinV I
0 01 .1
MaxMax
Min
VR R R SI
+ = = =
Tai o
tr
khang ng day la
so
thc, cc ai
( )0
1Min
VI
R
+ =
MinI I I I I+ + += =
.MaxV V V V V + + += + = + Va :
Nut ien ap ~ Bung dong ien
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50
Tai o
tr
khang ng day la
so
thc, cc tieu
00
1
1
MinMin
Max
V RR R
I S = = =+
~Min MaxV I
MaxI I I I I+ + += + = +
( )0
1Max VIR
+ = +
.MinV V V V V + + += = Va :
Xc nh tr
khng ng dy bng cch o h
s
sng ng, p86
Ex3.14
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51
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52
TOM TAT CHNG 1
I. ng Day Truyen Song
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53
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54
Cac Thong So S Cap Cua ng Day R (Ohm/m) : ien tr tuyen tnh L (H/m) : ien cam tuyen tnh C (F/m) : ien dung tuyen tnh
G (S/m) : ien dan tuyen tnh
1) Phng Trnh Truyen Song
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55
22
2
2
22
( , )( ). ( , )
( , ) ( ). ( , )
V xV x
x
I x I xx
=
=
22
2
22
2
( ). ( )
( ). ( )
V xV x
x
I xI x
x
=
=
Ch
xet
mot tan so:
2) Nghiem Phng Trnh Truyen Song
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56
. .( ) . .x xV x V e V e + = +
Song Phan XaSong Ti
. .( ) . .x xI x I e I e + = +
0 0,
V V
I IZ Z
+
+ = =
3) Cac Thong So
Th
Cap
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57
He So Truyen Song: ( ) ( ) ( )j = +He
So
Suy Hao: [ ]( ) , /Np m [ ]( ) , /dB m
He
So
Pha: [ ] [ ]( ) , / , /rad m m o
2=
Tr
Khang ac Tnh :
[ ]0,Z
ng truyen khong ton hao
:0 0Z R
II. He So Phan Xa, Tr Khang ng Day
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58
1) He
So
Phan Xa: = Song Phan Xa
Song Ti
He
So
Phan Xa
Tai Tai :
0
0
( ) LZlZ
= =+
L
L
ZZ
V I =
Tnh He So Phan XaTai iem x thong qua :L 2( ) . dLx e =
2) Tr Khang ng Day:
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59
3) Dan nap ng day :
ng truyenkhong ton hao:
00
0
. ( )( )
. ( )
L
L
Z Z th dZ x Z
Z Z th d
+=+
00
0
. ( )( ) .
. ( )
L
L
Y Y th d Y x Y
Y Y th d
+=
+
00
0
. . ( )( )
. . ( )
L
L
Z j R tg dZ x R
R j Z tg d
+=
+
4) Quan He
Gia Tr
Khang ng Day Va
He
So
Phan Xa
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60
5) Tr Khang Chuan Hoa:
01 ( )( )1 ( )
xZ x Zx
+ =
0
0
( )( )( )
Z x ZxZ x Z
=+
0
( )( ) Z xz xZ
=
0
( )( ) Y xy xY
=Dan Nap Chuan Hoa:
III. Hien Tng Song ng, He So Song ng1) Hien Tng Song ng
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61
Song ti va
song phan xa
giao thoa tao ra cac
iem bung song va nut song.
2) He
So
Song ng
1
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62
11
S VSWR+ = =
Bung ien ap ~ Nut dong ien
0 0
1.
1
Max
MaxMin
VR R R S
I
+ = = =
Nut ien ap ~ Bung dong ien
00
1
1
MinMin
Max
V RR R
I S
= = =
+
Chng 2: O TH SMITH
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1
I. Gii Thieu
l
SZ
0Z LZS
E
0x
x
d
( ), ( )x Z x
SZ
0Z LZS
E
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2
l0
x
xd
0
1
1Z Z
+ =
Z
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3
0
1
1
Zz r jx
Z
+ = = = +
Re( ) Im( )j = +
Ch
Xet Tr
Khang a chuan hoa
theo 0Z
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4
1r
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5
1, 0 ,1 1
r
r r =
+ + Tam : Ban knh
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1) Mo Ta o Th Smith
II. o Th Smith
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8
1) Mo Ta o Th Smith
Phoi hp
tr khang
Vong Tronn V 1, 0r = =Cac ng
tron ang rIm( )
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9
tr khang0, 1, 0r x = = =
1, z = = H MachNoi tat
1, 00, 0
zr x
= =
= =
Cac ngtron ang x
Re( )
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10
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11
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12
Vong Tron ang
( )l
2( ) ( ). dx l e =
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13
2 d
( )l
( )x
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14
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15
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16
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17
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18
2) ac Tnh
a) Bieu dien dan nap tren o th smith
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19
) p
1
1z
+ =
1
1
z
z
=
+
1
1 1
1 11
yy
y
y
= = ++
Quan he
gia vi z, giong quan he
gia vi y
y g jb= +
z r jx= +
ang b
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20
1y g jb
z= = +
ang g
b) iem bung song va
nut song tren o
th Smith
11
S + =Vong Tron ang
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21
1 Vong Tron angVong Tron ang S
iem nut song ap
minr
maxr
iem bung song ap
1) Tnh He Sophan Xa, Tr Khang ng Day,He So Song ng
III. ng Dung o Th Smith
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22
p g g yHe
So
Song ng
d
0R LZ
, Z
0
L
L L L
Z
z r jxR= = +
Lz
L L Lz r jx= +
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23
( )l
d
L
z
0.z Z z R =
maxdLz
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24
( )l
L
mind
maxVminV
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25
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26Ex. 35 p.104
2) Ve Vector ap va
dong tren o
th Smith
V V V+ = +
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27
(1 ).V
eV+
= +
Chuan hoa
theo vector V+
(1 ).I
eI+
=
Tng t
cho vector dong I
I+
(1 ).V
eV+
= +
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28
1
V
V+
maxV
minV
(1 ).I
eI+
=
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29
1
I
I+
maxI
minI
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30
3) Tnh Tr
Khang Mach Phc Hp
L
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31
C110p
R50
22.5nH
C212p
Z910 ( / )rad s=
1
1
0
1/1 2
RC
R j Cz j
R
+= =
50 ( )= 0chon : R
10.2 0.4RCy j= +
1 20.2 1
RC Cy j= +
C
2
2
0
0.2
0.6 ,1/
C
gj C
b yR
=
= =
L
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32
11 2RCz j=
A
B
1 2
0.2 0.95RC Cz j=
D
0. 10 25 ( )Z R z j = =
C1
10p
R50
L
22.5nH
C212p
E
0.2 0.5z j= 0
0.2
0.45 , L
r
j Lx z
R
=
= =
4) Phoi Hp Tr
Khang ng Truyen Song
( ) 2 21P
P P P P= =
t ti ti ti
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33
o Khi co phoi hp tr khang, toan bo cong suat t nguon se ca en tai tieu thu.o
Khi khong phoi hp tr
khang, cong suat phan xa
ve
co
the
lam hong nguon phat.o
Khi khong phoi hp tr
khang, tieu hao tren ng day tang.o
Khi khong phoi hp tr
khang, xuat hien cac iem bung song,
gay qua ap hoac qua dong
Pphan xa
a) Phoi hp tr
khang bang mach ien
thong so
tap trung
Machh i
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34
0R LZphoi
hp tr
khang1X
2X LZ0R
Mang 2 ca hnh
1X
2X LZ0R
Mang 2 ca hnh
1jx
VD: 90 50 ( ), 10 40 ( ) , 10 ( / )LR Z j rad s= = =
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35
1j
2
2
1jbjx
=
0
0.2 0.8LL
Zz jR
= =
Lz1
1
t L
t
t
z z jx
yz
= +
=
2
0 0
1
1/ 1
.
ty y jb
z y
Z R z R
= + = = =
= =
C
1 2ty j= +
2 2 2 2
2
2 , 1/ 0.525( )
b b jx jb xL nH
= = = = =Cam khang :
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36
0.2 0.8Lz j=
A
D
B
C
0.2 0.4tz j=
1
1
0.4 0
20( )
x x
L nH
= = >
=Cam khang :
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1jx
VD: 90 50 ( ), 10 40 ( ) , 10 ( / )LR Z j rad s= = =
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38
2jb
0
0.2 0.8LL
Zz jR
= =
10.3 1.18
L
L
L
z
y jz
= = +
2
1
t L
t
t
y y jb
zy
= +
=
1
0 0
1
.
tz z jx
Z R z R
= + = = =
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D
1 1 55z j= +
2 2 2 2
2
1.64 , 1/ 0.6130.5( )
b b jx jb xL nH
= = = = =Cam khang : B
0.3 1.18Ly j= +
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40
0.2 0.8Lz j= A
C0.3 0.46ty j=
1 1.55tz j= +
1
1
1.55 0
13( )
x x
C pF
= =
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