B3791 EPCOS AG, B3791 Datasheet - Page 3

• Manufacturer Part Number: B3791
• Description: Front-end Filters Narrow-band
• Manufacturer: EPCOS AG

Data sheet
Characteristics
Temperature range for specification:
Terminating source impedance:
Terminating load impedance:
1)
Please read cautions and warnings and
important notes at the end of this document.
Center frequency
Minimum insertion attenuation
incl. loss in matching elements (Q
excl. loss in matching elements
Pass band (relative to
Relative attenuation (relative to
Impedance for pass band matching
SAW Components
SAW filter
impedance (here 50 Ohm). After removal of the SAW filter the input impedance of the input and output match-
ing network is calculated. The conjugate complex value of these characteristic impedances are the input and
output impedances for flat passband. For more details we refer to EPCOS application note #4.
Impedance for passband matching bases on an ideal, perfect matching of the SAW filter to source- and to load
Input:
Output: Z
433.30 ... 433.54 MHz
429.00 ... 432.62 MHz
433.92 ... 434.22 MHz
434.22 ... 434.60 MHz
434.60 ... 435.60 MHz
435.60 ... 460.00 MHz
460.00 ... 1000.00 MHz
10.00 ... 429.00 MHz
Z
IN
OUT
min
= R
= R
)
IN
OUT
|| C
|| C
L
= 47)
min
1)
IN
OUT
)
f
C
rel
T
Z
Z
min
S
L
3
= –20 ˚C to +80 ˚C
=
=
December 13, 2006
min.
50
50
50
35
16
35
20
40
50
—
—
—
—
—
—
and matching network
and matching network
@ 25 ˚C
640 || 1.5
640 || 1.5
433.42
typ.
3.8
3.1
1.0
55
44
25
38
25
50
58
max.
4.5
3.8
3.0
—
—
—
—
—
—
—
—
—
—
433.42 MHz
MHz
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
B3791
|| pF
|| pF