tfs400.doc
version 1.3
06.01.02
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VI TELEFILTER
Filter specification
TFS 400
1/4
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Application
The filter is suitable for GSM, DCS 1800 and dual band receivers. It can especially be used in the first IF in which
full channel selectivity is not necessary. Due to the high frequency the filter is small, thus it saves cost and space
on the printed circuit board. As it has symmetrical input and output it does not need any transformation networks
in state of the art IC transceiver concepts in which symmetrical inputs and outputs are favourable.
Measurement condition
Ambient temperature: 23
°C
Input power level:
0 dBm
Source impedance: balanced 800
Ω
II - 0.7 pF
Load impedance: balanced 800
Ω
II - 0.7 pF
Construction and pin configuration
see page 2
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 400_1 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 fo 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 on 400,000 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 also if the centre frequency
fo 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 fo.
Data
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typ. value
4,5
tolerance/limit
max. 6,5
Insertion loss
(Reference level)
ae = amin
dB
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400,000 MHz
-
fo
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Centre frequency
usable signal bandwidth
3 dB bandwidth
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-
min 140
kHz
360
kHz
min 280
kHz
BW
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arel
Relative attenuation
400 MHz ± 400 kHz
400 MHz ± 600 kHz
400 MHz ± >1 MHz ... f ± 13 MHz
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25
35
44
dB
dB
dB
µs
min 15
min 27
min 35
dB
dB
dB
µs
Group delay ripple
400 MHz ± 70 kHz
GD
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0,5
max. 2
- 20
°C
... + 70
°C
Operating temperature range
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ca. - 0.036 ppm/K²
Temperature coefficient of frequency
TC
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Frequency inversion temperature
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+ 20
°C
Generated:
Checked / approved:
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VI TELEFILTER
Vectron International, Inc.
Potsdamer Straße 18
267 Lowell Road
D 14 513 TELTOW / Germany
Hudson, NH 03051 / USA
Tel: (+49) 3328 4784-52 / Fax: (+49) 3328 4784-30
Tel: (603) 598-0070 Fax: (603) 598-0075
E-Mail: tft@telefilter.com
E-Mail: vti@vtinh.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.
VECTRON [ Vectron International, Inc ]
