TFS433F Datasheet, PDF (3/5 Pages) Vectron International, Inc – Filter specification

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50 Ω test circuit and theoretical values of matching elements
Remark:
The values of the matching elements which are given below are calculated from the source and load impedance.
If the values of the matching elements are not equal to standard values the best standard values are given in
brackets. If standard matching elements instead of the exact values are used it can not be guaranteed that the
specification will be fulfilled.
Because these are theoretical values they have to be modified on PCB’s corresponding to the existing parasitics.
50 Ω test circuit1
Input
50 Ohm
C1
2
L1
SAW
C2
8
L2
Output
50 Ohm
1,3,4,5,6,7,
9,10,11,12
C1 = 2,9 pF
C2 = 2,9 pF
(2,7 pF)
(2,7 pF)
L1 = 40 nH
L2 = 40 nH
(39 nH)
(39 nH)
50 Ω test circuit2
Input
50 Ohm
L1
2
C1
SAW
L2
8
C2
L1 = 47 nH
L2 = 47 nH
C1 = 1,6 pF
C2 = 1,6 pF
1,3,4,5,6,7,
9,10,11,12
(1,5 pF)
(1,5 pF)
Output
50 Ohm
______________________________________________________________________________________________________
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