Low Pass Filter Electrical Specifications @ 25°C
Maximum Ratings
Operating Temperature -55°C to 100°C
Storage Temperature -55°C to 100°C
RF Power Input* 10W max. at 25°C
Typical Performance Data @ 25°C
Frequency
(MHz)
Insertion Loss
(dB)
VSWR
(:1)
Functional Schematic
RF IN RF OUT
*Passband rating, derate linearly to 3.5W at 100°C ambient.
Outline Dimensions ( )
inch
mm
B D E wt.
.39 2.67 .312 grams
9.91 67.82 7.92 17.0
MODEL
NO.
PASSBAND
(MHz)
(Loss < 1.2dB)
Max.
fco, MHz
Nom
(Loss 3 dB)
Typ
STOPBAND (MHz)
(Loss, dB)
VSWR (:1) NO. OF
SECTIONS
f20
Min.
f40
Typ.
Stopband
Typ.
Passband
Typ.
VLFX-1125 DC-1125 1825 2125 2300-20000 10 1.4 21
Outline Drawing
Typical Frequency Response
FREQUENCY
>20 GHz
fco f20 f40
40 dB
ATTENUATION (dB)
20 dB
3 dB
1 dB
50 0.20 1.05
250 0.29 1.06
500 0.47 1.05
1000 0.98 1.33
1125 1.00 1.42
1250 1.22 1.50
1500 1.51 1.47
1825 2.87 1.57
1950 7.42 3.84
2125 28.25 10.09
2300 48.17 15.86
4000 87.43 33.59
6000 73.04 64.26
8000 78.45 48.12
10000 71.93 40.02
12000 57.91 20.21
14000 49.00 15.03
16000 81.35 24.55
18000 64.13 22.79
20000 73.49 2.20
Features
Applications
• harmonic rejection
• transmitters/receivers
• lab use
• test instrumentation
• very good isolation, 40 dB up to 20 GHz
• 21 sections
• excellent power handling, 10W
• temperature stable LTCC internal structure
• re-entry frequency > 20 GHz
• rugged unibody construction
• protected by US patent 6,943,646
CASE STYLE: FF1118
Connectors Model Price Qty.
SMA VLFX-1125-S $39.95 ea. (1-9)
INTERNET http://www.minicircuits.com
P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661
Distribution Centers NORTH AMERICA 800-654-7949 • 417-335-5935 • Fax 417-335-5945 • EUROPE 44-1252-832600 • Fax 44-1252-837010
Mini-Circuits®
Mini-Circuits ISO 9001 & ISO 14001 Certified
DC to 1125 MHz (40 dB Isolation up to 20 GHz)
Low Pass Filter
Coaxial
REV. A
M97025
VLFX-1125
EDU-0399
ED-11930A/17
URJ/RS/CP
060605
VLFX-1125
VLFX-1125
INSERTION LOSS
0
10
20
30
40
50
60
70
80
90
100
0 4000 8000 12000 16000 20000
FREQUENCY (MHz)
INSERTION LOSS(dB)
VLFX-1125
VSWR
1
10
100
0 4000 8000 12000 16000 20000
FREQUENCY (MHz)
VSWR
