Coaxial
Bandpass Filter
50Ω Constant Impedance 18 to 25 MHz
SIF-21.4+
Features
Maximum Ratings
Operating Temperature
-55°C to 100°C
-55°C to 100°C
0.5W max.
• low VSWR in pass-and stopbands, 1.3:1 typ.
• rugged shielded case
CASE STYLE: FF99
Connectors Model
Storage Temperature
• custom fo models available
RF Power Input
Permanent damage may occur if any of these limits are exceeded.
SMA
SIF-21.4+
Applications
• harmonic rejection
• lab use
+RoHS Compliant
The +Suffix identifies RoHS Compliance. See our web site
for RoHS Compliance methodologies and qualifications
Bandpass Filter Electrical Specifications
CENTER
FREQ.
(MHz)
PASSBAND
(MHz)
STOPBANDS
VSWR, 1.3:1 Typ.
TOTAL BAND
(MHz)
(loss > 10 dB)
at MHz
(loss > 20 dB)
at MHz
(loss<1 dB)
18-25
21.4
4.9 & 85
1.3 & 150
DC-220
Outline Drawing
typical frequency response
electrical schematic
Typical Performance Data
Return Loss
(dB)
Frequency
(MHz)
Frequency
Insertion Loss
Group Delay
(nsec)
(MHz)
(dB)
_
σ
x
1.00
1.10
1.10
1.20
1.20
1.30
1.40
3.70
4.90
25.27
24.91
24.55
24.24
23.93
23.64
23.17
15.71
13.27
11.38
7.85
5.18
2.92
0.72
0.14
0.01
0.05
2.02
7.93
10.88
13.23
15.41
17.64
19.87
22.27
26.56
28.96
31.82
35.24
38.08
0.20
0.20
0.20
0.20
0.20
0.20
0.20
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.20
0.20
0.20
0.20
0.20
0.20
0.10
0.10
0.20
0.20
0.30
0.60
1.40
52.20
51.60
51.70
51.40
51.20
50.90
50.10
41.80
39.00
36.80
32.80
29.50
27.20
26.50
26.20
25.80
26.00
31.00
34.80
35.60
34.40
32.90
31.40
30.20
29.20
27.70
27.10
26.60
26.00
25.60
1.20
1.30
1.40
2.60
3.70
4.90
5.00
7.90
4.399
6.493
5.803
6.877
7.658
8.204
8.142
9.473
11.528
14.015
14.909
16.385
16.348
16.309
15.915
15.629
15.139
14.502
13.843
13.162
11.927
6.934
inch
Outline Dimensions (
)
mm
B
D
E
wt
.67
1.98
.312 grams
17.02 50.29
7.92
42.0
11.00
14.00
15.00
17.90
18.80
19.80
20.90
21.60
22.40
23.20
24.00
24.80
26.20
32.70
33.90
51.30
67.60
84.60
86.10
107.80
128.10
147.10
6.00
8.70
11.30
14.00
18.00
20.30
21.50
23.80
40.00
55.00
70.00
85.00
100.00
116.70
133.30
150.00
175.00
186.30
197.50
208.80
220.00
6.349
2.263
1.347
0.959
0.936
0.693
0.484
0.321
GROUP DELAY
INSERTION LOSS
RETURN LOSS
at RF level of 0 dBm
at RF level of 0 dBm
at RF level of 0 dBm
100
80
60
40
20
0
20.0
16.0
12.0
8.0
50
40
30
20
10
0
4.0
0.0
0
50
100
150
0
40
80
120
160
200
240
0
40
80
120
160
200
240
FREQUENCY (MHz)
FREQUENCY(MHz)
FREQUENCY(MHz)
Notes
A. Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document.
B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions.
C. The parts covered by this specification document are subject to Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitled
to the rights and benefits contained therein. For a full statement of the Standard Terms and the exclusive rights and remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp
®
REV. C
Mini-Circuits
M151107
SIF-21.4+
151001
www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com