TFS420H Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Filename: tfs 420h.doc
VI TELEFILTER
Version 1.3
Filter specification
TFS 420H
26.04.2004
1/5
Measurement condition
Ambient temperature:
Input power level:
Terminating impedance: *
Input:
Output:
23
°C
0
dBm
61 Ω || -9.0 pF
81 Ω || -8.9 pF
Characteristics
Remark:
The reference level for the relative attenuation arel of the TFS420H 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 420 MHz without any tolerance. The given values for the relative
attenuation arel have to be achieved 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
typ. value
tolerance / limit
Insertion loss
(reference level)
ae
8,2 dB
max.
10 dB
Nominal frequency
(at 70°C)
Centre frequency
(at ambient temperature)
f_N
f_C
421,7 MHz
420 MHz
Passband
Pass band ripple
0,5 dB
f_N
± 15
max.
1
MHz
dB
Relative attenuation
f_N - 410
f_N + 25
f_N + 180
MHz … f_N -
25
MHz … f_N + 180
MHz … f_N + 580
Phase linearity (p-p) within PB
arel
MHz
MHz
MHz
43
dB
42
dB
55
dB
min.
min.
min.
max.
40 dB
40 dB
25 dB
12 deg
VSWR within f_N ± 12 MHz
within f_N ± 15 MHz
1,4:1
1,6:1
max.
max.
1,5:1
1,8:1
Operating temperature range
OTR
+ 65 °C ... + 75°C
Storage temperature range
- 40 °C ... + 85°C
Temperature coefficient of frequency
TCf **
-87
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.
**) ∆fc(Hz) = Tc_f(ppm/K) x (T - T_A) x f_CAT (MHz)
Generated:
Checked / Approved:
Tele Filter GmbH
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: [phone] / Fax: [phone]
E-Mail: [e-mail]
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