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TFS912 Filter Specification
型号:   TFS912
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描述:   Filter Specification
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品牌   VECTRON [ Vectron International, Inc ]
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Tfs912.doc
version 1.2
02.07.2002
VI
TELEFILTER
Measurement condition
Ambient temperature:
Input power level:
Terminating impedances*
for input:
for output:
23
0
°C
dBm
Filter Specification
TFS 912
1/5
190
// -0.15 pF
190
// -0.15 pF
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 912 is the minimum of the pass band attenuation amin. The minimum of the pass band
attenuation amin is defined as the insertion loss ae. The centre frequency fc is the arithmetic mean value of the upper and lower frequencies at
the -3 dB filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed at 912,5 MHz without tolerance. The given
values for the relative attenuation arel and for the group delay ripple have to be reached at the frequencies given below even if the centre
frequency fc is shifted due to the temperature coefficient of frequency TCf in the operating temperature range and due to a production tolerance
for the centre frequency fc.
Data
Insertion loss
(Reference level)
Nominal frequency
Centre frequency
2 dB Bandwidth
3 dB Bandwidth
Pass band ripple
Relative attenuation
f
N
– 117,5 MHz .... f
N
f
N
+ 117,5 MHz .... f
N
f
N
+ 257,5 MHz .... f
N
f
N
+ 302,5 MHz .... f
N
ae = amin
fN
fc
typ. value
3,85
-
912,5
54,3
57,7
1.8
dB
dB
dB
dB
-
-
MHz
MHz
MHz
dB
min.
min.
min.
min.
dB
tolerance/limit
max.
5,0
912,5
dB
MHz
BW
BW
within
±
22,5 MHz
arel
– 812,5 MHz
+ 257,5 MHz
+ 302,5 MHz
+ 587,5 MHz
47,0
50,0
50,0
50,0
-
min.
max.
40,0
30,0
45,0
40,0
45,0
3,0
dB
dB
dB
dB
MHz
dB
Operating temperature range
Storage temperature range
Temperature Coefficient
- 25
°C
... + 75
°C
- 30 °C ... + 80 °C
TC
- 72 ppm / K
*) The terminating impedances depend on parasitics and q-values of matching elements and the board used, and are to be understood as
reference values only. Should there be additional questions do not hesitate to ask for an application note or contact our design team.
Generated:
Checked / approved:
VI TELEFILTER
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
E-Mail:
tft@telefilter.com
VI TELEFILTER reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is
assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information.
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