(UNTITLED)

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP81B00878R001400100004-7
• Release Decision: RIFPUB
• Original Classification: K
• Document Page Count: 7
• Document Creation Date: December 9, 2016
• Document Release Date: July 20, 2000
• Sequence Number: 4
• Content Type: CHART

Approved For Release 2001/07/27 : CIA-RDP81600878R001400100004-7
Z03
VSWR
Z02
tz13
Z2
Zoi
Zo = I
I
FIGURE 1 - Coaxial Transmission Line with Choke Couplings Used as a Rotary Joint
Approved For Release 2001/07/27 : CIA-RDP81600878R001400100004-7
Approved For Releau,2001/07/27 : CIA-RDP811300878R001411,0100004-7
I 1.5
1.4
1.3
VSWR
?80
1,2
n=0
n=1
n=2
4." _1 1's" t .1-- .1
?20 0 20
4) IN DEGREES
40
60 80
FIGURE 2 - Input VSWR to Coaxial Transmission Line with Choke
Couplings for Various Values of n. Choke Impedance,
Z01 = .0324 (Normalized to Unity)
Approved For Release 2001/07/27 : CIA-RDP81600878R001400100004-7
Approved For Releauf2001/07/27 : CIA-RDP811300878R001410100004-7
100
_ 30
20
FREQUENCY BANDWIDTH
10
2
1 1 1 1 111111 1 I 1 I 11111
VSW13.1.11
=1
n=1
1 '
.01 .02
J 1 111111 1 1 1 111_1,__1__
.05 0.1 0.2 0.5 1.0
CHOKE IMPEDANCE Z01 ( NORMALIZED TO UNITY)
FIGURE 3 - Frequency Bandwidth Curve of Coaxial Transmission
Line with Choke Couplings When Chokes are Spaced
X/4 at the Center Frequency. Bandwidth Determined
by the Transmission Line VSWR of 1.1:1
Approved For Release 2001/07/27 : CIA-RDP81600878R001400100004-7
Approved For Releauk2001/07/27 : CIA-RDP81B00878R001440100004-7
V S W1-R
Zoi
Z0
20
4- 4- I
?
HO
1.08
1.06
1.04
1.02
FREQUENCY BAtZW1DTH,
7. I
--x-
2 n= 2
-A
I 1 I _1 L __I 1 t...1 LL 1
.01 .02 .05 .1 .2
CHOKE IMPEDANCE Z01
1.0o
I I L I t I I I
.04 .08 .12 .16
CHOKE IMPEDANCE Z01 (NORMALIZED TO UNITY)
FIGURE 4 - Response Curves for Coaxial Transmission Line With
Choke Couplings When Chokes are Spaced X/2 Apart
at the Center Frequency. (a) Frequency Bandwidth
Determined by the Transmission Line VSWR of 1. 1 : 1 .
Approved For ReleUgeT21001)blhar :(dAkft1D13840YORROCNNollibetV43- and Limits
(a)
(b)
Approved For Releaue2001/07/27 : CIA-RDP811300878R0011W100004-7
-1.5 .1- t
-.--- =0.667X
OR n = 2.67
-80
-60
-40
-20 0
O. IN DEGREES
20
40
I I 1
60 80
FIGURE 5 - Input VSWR Curve of Coaxial Transmission Line With
Choke Couplings When Chokes are Spaced 0.677X Apart
for Zoi = 0.0324 (Normalized to Unity)
Approved For Release 2001/07/27 : CIA-RDP81600878R001400100004-7
Approved For Release 2001/07/27 : CIA-RDP81600878R001400100004-7
Xo
2
Z03
Fuzfifw-ir2+z?,
z2
z04
Zo
ZI
zoi
V111.11/11/??J/l,
Wig/um
\Zo2
WM TEFLON DIELECTRIC. F
/1
P= X air
4\re?
T ? r
FIG:Waived 200141101-27`PCIA4ROMP1V13681bPd8114a0
0100 U0 On4i -t 7 Design Using
Choke Couplings
Approved For Release 2001/07/27 : CIA-RDP81600878R001400100004-7
14.0,
FIGURE 7 - DC Isolation Unit Built for 50 mc to 900 mc Operation
(Insertion Loss Less Than 0.5 db) Using The Choke
Coupling Design Described. (Courtesy of Ramo-
Wooldridge
Approved For Release 2001/07/27 : CIA-RDP81600878R001400100004-7