Outline Drawing
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
Typical Performance Data
Directional Coupler Electrical Specifications
Maximum Ratings
Coaxial Connections
INPUT
1
OUTPUT
2
COUPLED
3
Operating Temperature
-55C to 100C
Storage Temperature
-55C to 100C
Outline Dimensions ( )
inch
mm
ZFDC-20-3-75
MAINLINE LOSS
0.0
0.2
0.4
0.6
0.8
1.0
10
58
106
154
202
250
FREQUENCY (MHz)
MAINLINE
LOSS
(dB)
at RF level of -10 dBm
ZFDC-20-3-75
COUPLING & DIRECTIVITY
0
10
20
30
40
50
60
70
10
58
106
154
202
250
FREQUENCY (MHz)
C
O
U
P
L
I
N
G
&
D
I
R
E
C
T
I
V
I
T
Y
(
d
B
)
COUPLING
DIRECTIVITY
at RF level of -10 dBm
ZFDC-20-3-75+
ZFDC-20-3-75
ZFDC-20-3-75
RETURN LOSS
0
10
20
30
40
50
10
58
106
154
202
250
FREQUENCY (MHz)
RETURN
LOSS
(dB)
IN
OUT
CPL
at RF level of -10 dBm
electrical schematic
INPUT
OUTPUT
COUPLED
75 10 to 250 MHz
Directional Coupler
REV. A
M98898
ZFDC-20-3-75
WZ/TD/CP
060803
Coaxial
A
B
C
D
E
F
G
H
1.25
1.25
.75
.63
.38
1.00
.125 1.000
31.75
31.75
19.05
16.00
9.65
25.40
3.18 25.40
J
K
L
M
N
P
Q
wt
--
--
.125
1.688
2.18
.75
.07 grams
--
--
3.18
42.88
55.37
19.05
1.78
70.0
CASE STYLE: K18
Connectors Model
Price
Qty.
BNC
ZFDC-20-3-75(+)
$49.95 ea. (1-9)
BRACKET (OPTION"B")
$2.50
(1+)
L = low range [f
L
to 10 f
L
] M = mid range [10 f
L
to f
U
/2] U= upper range [f
U
/2 to f
U
]
1. Mainline loss includes theoretical power loss at coupled port.
Frequency
(MHz)
Mainline Loss
(dB)
In-Out
Coupling
(dB)
In-Cpl
Directivity
(dB)
In
Return Loss
(dB)
Out
Cpl
FREQ.
RANGE
(MHz)
COUPLING
(dB)
MAINLINE LOSS
1
DIRECTIVITY
(dB)
VSWR
(:1)
POWER
INPUT
(W)
L
M
U
L
M
U
L
MU
f
L
-f
U
Nom.
Flatness Typ. Max. Typ. Max. Typ. Max. Typ. Min. Typ. Min. Typ. Min.
Typ.
Max.
Max.
10-250
19.30.5
0.3
0.25
0.4
0.3
0.5
0.4
0.6
29
25
29
25
28
24
1.2
1.0
2.0
Features
excellent directivity, 35 dB typ.
excellent insertion loss, 0.3 dB typ.
rugged shielded case
Applications
catv
VHF/UHF
instrumentation
+ RoHS compliant in accordance
with EU Directive (2002/95/EC)
The +Suffix identifies RoHS Compliance. See our web site
for RoHS Compliance methodologies and qualifications.
10.00
0.29
19.36
54.40
33.81
29.81
30.17
20.00
0.30
19.36
52.31
33.26
29.61
28.99
50.00
0.34
19.41
41.16
29.77
27.51
23.16
90.00
0.37
19.44
41.57
26.71
25.32
18.69
100.00
0.39
19.46
41.41
26.15
24.89
17.85
125.00
0.39
19.49
35.96
24.78
23.76
16.01
170.00
0.43
19.56
34.87
23.12
22.40
13.64
200.00
0.44
19.62
35.28
22.09
21.57
12.33
244.00
0.47
19.73
34.47
20.73
20.21
10.76
250.00
0.47
19.72
32.56
20.58
20.04
10.55
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