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
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-400 DC-400 540 670 700-20000 10 1.15 21
Outline Drawing
Typical Frequency Response
FREQUENCY
>20 GHz
fco f20 f40
40 dB
ATTENUATION (dB)
20 dB
3 dB
1 dB
Typical Performance Data @ 25°C
Frequency
(MHz)
Insertion Loss
(dB)
VSWR
(:1)
50 0.22 1.12
100 0.38 1.15
200 0.55 1.17
400 0.97 1.15
450 1.23 1.24
500 1.67 1.39
540 2.42 1.51
600 6.73 2.09
670 32.49 6.86
700 42.85 8.74
800 43.74 14.22
1000 44.36 26.35
3000 72.09 84.69
5000 64.87 54.70
7500 67.01 45.36
10000 75.88 16.45
12500 55.24 5.36
15000 55.32 13.07
17500 69.03 5.42
20000 70.03 16.72
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-400-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 400 MHz (40 dB Isolation up to 20 GHz)
Low Pass Filter
Coaxial
REV. A
M97025
VLFX-400
EDU-0399
ED-11930A/3
URJ/AD/CP
060605
VLFX-400
VLFX-400
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-400
VSWR
1
10
100
1000
0 4000 8000 12000 16000 20000
FREQUENCY (MHz)
VSWR
