245.0 MHz SAW Filter
Part Number
261852B
1. Features
Typical 1dB bandwidth of
18.5 MHz
High attenuation
Single Ended Operation
Surface Mounted Package (SMD)
2. Electrical Specifications
Source and Load Impedance = 50
Room Temperature: +25℃
℃
Center Frequency (fo)
Insertion Loss
1dB Bandwidth
3dB Bandwidth
40dB Bandwidth
Amplitude Ripple (Fo±9.0MHz)
Group Delay Variation (Fo±9.0MHz)
Absolute Delay
Ultimate Rejection
Temperature Coefficient of Frequency
MHz
dB
MHz
MHz
MHz
dB
nsec
usec
dB
ppm/℃
℃
Minimum
-
-
18.4
-
-
-
-
-
45
Typical
245.0
27.0
18.52
18.95
20.86
0.6
25
2.16
52
-18
Maximum
-
28.5
-
-
21.0
1.2
60
-
-
-
-
S1365 Package Dimension
13.30±0.2
10
9
8
7
7
7.62±0.1
8
9
10
Matching Schematic
11
5
L1
11
L3
Output
50
Ω
6.50±0.2
11
12
1.61±0.2
2.54±0.1
ITF 13A001
261852B
。
245-18.5M
1
2
3
4
6
6
1.50±0.1
Input
50
Ω
5
5
12
L2
C1
4
3
2
2.54±0.1
1
0.80±0.1
L1 = 8.2nH, L2 = 10nH, L3 = 15nH, C1 = 20pF
Dimensions shown are nominal in millimeters
Body : Al
2
O
3
Lid : Kovar, Ni Plated
Termination : Au plating 0.3 ~ 1.0um, over a 1.27 ~ 8.89um Ni Plating
Pin Configuration
Input
Output
11
5
Ground
Others
6, 12
Ground
I T F Co., Ltd.
102-901, Bucheon Technopark 364, Samjeong-Dong,
Ojeong-Gu, Bucheon-City,
Gyounggi-Do, Korea 421-809
Tel: 82-32-621-1213
Fax: 82-32-621-1218
http://www.itf.co.kr
sales@itf.co.kr
2013. 03. 27
Rev 1.0
245.0 MHz SAW Filter
Part Number
261852B
3. Typical Performance ( at +25℃ )
℃
1dB Bandwidth & Ripple
CH2 S21
CH4 S21
LOG
LOG
1 dB/
1 dB/
REF -26.82 dB
REF -26.97 dB
23 Mar 2012 07:22:39
1: 0. 0000 dB
0. 000 000 MHz
3: . 06970 dB
18. 000 000 MHz
CH1 S21
LOG
10 dB/
40dB Bandwidth
REF -27.16 dB
23 Mar 2012 04:04:42
1: 0. 0000 dB
0. 000 000 MHz
BW
:
CH2 Markers
REF=1
18. 521936 MHz
PRm
BW
:
1
2
Cor
CH1 Markers
REF=1
20. 860078 MHz
cent : 245 . 044847 MHz
Q: 13. 230
1_loss : -26 . 907 dB
1
2
cent : 245 . 031682 MHz
Q: 11. 746
1_loss : -27 . 073 dB
3
4
PRm
2
1
3
CH4 Markers
mean: -26 REF=2dB
. 938
s. dev : . 11460 dB
p-p : . 57430 dB
3
4
Cor
CENTER 245 . 000 000 MHz
SPAN 30. 000 000 MHz
2
4
CENTER 245 . 000 000 MHz
SPAN 60. 000 000 MHz
3dB Bandwidth & Group Delay
CH2 S21
CH4 S21
LOG
DEL
1 dB/
150 ns/
REF -26.82 dB
REF 2.091 us
23 Mar 2012 07:23:44
1: 0. 0000 dB
0. 000 000 MHz
3: 11. 088 ns
18. 000 000 MHz
CH1 S11
CH3 S22
1 U FS
1 U FS
Smith Chart
1: 57. 697
2: 33. 398
22. 797
16. 873
23 Mar 2012 04:05:30
14. 809 nH
245. 000 000 MHz
10. 961 nH
245. 000 000 MHz
BW
:
CH2 Markers
REF=1
18. 961029 MHz
PRm
cent : 245 . 050838 MHz
Q: 12. 924
1_loss : -26 . 905 dB
1
Cor
2
2
1
3
2
PRm
3
Smo
4
CH4 Markers
mean: 2. REF=2us
0914
s. dev : 5. 5871 ns
p-p : 24. 414 ns
Cor
1
CENTER 245 . 000 000 MHz
SPAN 30. 000 000 MHz
4
2
CENTER 245. 000 000 MHz
SPAN 60. 000 000 MHz
Wide band Properties
CH1 S21
LOG
10 dB/
REF -27.98 dB
23 Mar 2012 04:08:00
1:-27 . 917 dB
245 . 000 000 MHz
CH1 S11
CH3 S22
SWR
SWR
1 /
1 /
SWR(S11 & S22)
REF 1.561
REF 1.771
23 Mar 2012 04:06:00
1: 1. 5604
245 . 000 000 MHz
2: 1. 7704
245 . 000 000 MHz
PRm
1
PRm
1
Cor
2
START
. 010 000 MHz
STOP 800 . 000 000 MHz
CENTER 245 . 000 000 MHz
SPAN 60. 000 000 MHz
I T F Co., Ltd.
102-901, Bucheon Technopark 364, Samjeong-Dong,
Ojeong-Gu, Bucheon-City,
Gyounggi-Do, Korea 421-809
Tel: 82-32-621-1213
Fax: 82-32-621-1218
http://www.itf.co.kr
sales@itf.co.kr
2013. 03. 27
Rev 1.0
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