TFS149 Datasheet, PDF (2/5 Pages) Vectron International, Inc – Filter specification

File name: Tfs149.doc
VI TELEFILTER
Filter specification
3. Construction and pin connection
(All dimensions in mm)
Version 1.3
TFS 149
27.02.2003
2/5
22,5 Max.
TFS 149
R22
1
12
7
14
98
10,16 ±0,2
15,24±0,2
ø 0,45 ±0,05
Date-code
Date-code:
N
P
R
...
Pin 1
Pin 14
Pin 8
Pin 7
Pin 2, 9
Year+week
2001
2002
2003
...
Input
Input RF Return
Output
Output RF Return
Package Ground
4. 50 matching network ( for details about other schemes refer to application note ):
C₁
L₃
L₁
Scheme 1
12
14
7
L₂
98
L₄
C₂
For final test we use scheme 1 ( with variable coils L₁ and L₂.)
Influence of inductors L₁ and L₂ on filter slope is stronger , as of L₃ and L₄
( please, refer to Application Note ).
For this reason, it is possible to match the filter to minimum slope changing L₃ and L₄ using fixed E12
series inductor values ( SMD-elements ) and no changing L₁ and L₂ .
If you use variable coils, then better to use scheme 1 with variable coils L₁ and L₂ ,
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