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SAW Components
SAW filter
Data sheet
Characteristics
Temperature range for specification:
Terminating source impedance:
Terminating load impedance:
T = –45 ?C to +95 ?C
Z S = 50 ? and matching network
Z L = 50 ? and matching network
B3961
315.00 MHz
min.
typ.
@ 25 ?C
max.
Center frequency
f C
—
315.00
—
MHz
Minimum insertion attenuation
α min
incl. loss in matching elements (Q L = 42)
excl. loss in matching elements
—
—
2.1
1.7
2.7
2.3
dB
dB
Pass band (relative to α min )
314.85 ... 315.15 MHz
314.82 ... 315.18 MHz
—
—
0.5
0.8
2.0
3.0
dB
dB
Relative attenuation (relative to α min )
α rel
10.00 ... 307.00 MHz
307.00 ... 310.00 MHz
310.00 ... 313.20 MHz
313.20 ... 314.10 MHz
315.90 ... 316.50 MHz
316.50 ... 318.50 MHz
318.50 ... 320.50 MHz
320.50 ... 323.00 MHz
323.00 ... 330.00 MHz
330.00 ... 335.00 MHz
335.00 ... 380.00 MHz
380.00 ... 600.00 MHz
600.00 ... 1600.00 MHz
1600.00 ... 2000.00 MHz
2000.00 ... 2500.00 MHz
50
35
24
16
18
23
30
25
40
44
48
50
60
50
35
58
45
31
21
26
28
40
34
45
50
56
56
65
56
40
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Impedance for pass band matching 1)
Input: Z IN
= R IN
|| C IN
—
590 || 2.0
—
? || pF
Output: Z OUT = R OUT || C OUT
—
590 || 2.0
—
? || pF
1)
Impedance for passband matching bases on an ideal, perfect matching of the SAW filter to source- and to load
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 #18.
Please read cautions and warnings and
important notes at the end of this document.
3
May 15, 2013
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