TFS250 Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Filename: tfs250.doc
VI TELEFILTER
version 3.0
Filter specification
TFS 250
22.02.2002
1/5
Measurement Condition
Ambient Temperature:
Input Power Level:
Source impedance:
Load impedance:
Terminating impedances: *
input:
output:
23 °C
0 dBm
50 Ω
50 Ω
1,05 kΩ || -7.9 pF
1,02 kΩ || -8.2 pF
Characteristics
Remark:
Reference level for the relative attenuation arel is the minimum pass band attenuation a_min. It is defined as the insertion loss ae. The nominal
frequency fN is fixed to 250,0 MHz. The centre frequency fc is the arithmetic mean value of the upper and lower frequencies at the 1,0 dB filter
attenuation level relative to the insertion loss ae. The given values for the insertion loss, the relative attenuation arel and the group delay ripple
have to be reached at the frequencies given below also 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
typ. Value
Limit
Insertion loss
(Reference level)
a_e = a_min
13,0
dB
max. ± 1 dB
Nominal frequency
f_N
-
250,0 MHz
Passband
PB
-
f_N ± 2 MHz
Amplitude ripple in PB
0,4
dB
max. 1,0 dB
Relative attenuation
arel
fN ± 3,0
fN ± 3,5
fN ± 4,0
fN - 249,0
fN + 6,0
fN + 12,5
fN + 14,3
fN + 24,6
fN + 29
MHz ... fN ± 3,5
MHz ... fN ± 4,0
MHz ... fN ± 6,0
MHz ... fN - 6,0
MHz ... fN + 12,5
MHz ... fN + 14,3
MHz ... fN + 24,6
MHz ... fN + 29,0
MHz ...
2,5
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
GHz
25
dB
40
dB
40
dB
52
dB
52
dB
65
dB
65
dB
70
dB
40
dB
min. 11 dB
min. 21 dB
min. 24 dB
min. 40 dB
min. 40 dB
min. 54 dB
min. 40 dB
min. 54 dB
min. 30 dB
Group delay ripple in PB
ϕ
60
ns
max. 150 ns
Phase ripple in PB
3,5
°p-p
max. 5 ° p-p
VSWR in PB
Input power level
Continous power
Peaks for cycle times<1%
1,65:1
-
-
max. 2:1
max. 10 dBm
max. 20 dBm
Operating temperature range
-
- 10 °C ... + 85 °C
Temperature coefficient of frequency TC **
-0,036 ppm/K²
-
Frequency inversion temperature T₀
25
°C
-
*) 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.
**) ∆f(Hz) = TCf(ppm/K²) x (T-T₀)² x fTo(MHz)
Generated:
Checked / approved:
VI TELEFILTER
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D 14 513 TELTOW / Germany
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Vectron International, Inc.
267 Lowell Road
Hudson, NH 03051 / USA
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E-Mail: [e-mail]
E-Mail: [e-mail]
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