Coaxial
Directional Coupler
ZFDC-20-4+
50Ω
1 to 1000 MHz
BNC version shown
Maximum Ratings
Operating Temperature
Storage Temperature
Features
CASE STYLE: K18
• wideband, 1 to 1000 MHz
-55°C to 100°C
-55°C to 100°C
Connectors Model
Price
Qty.
• excellent directivity, 27 dB typ.
• excellent mainline loss, 0.4 dB typ.
• excellent VSWR, 1.1:1 typ.
• rugged shielded case
BNC
SMA
N-TYPE
ZFDC-20-4+
ZFDC-20-4-S+
ZFDC-20-4-N(+)
$64.95
$69.95
$69.95
$5.00
(1-9)
(1-9)
(1-9)
(1+)
Permanent damage may occur if any of these limits are exceeded.
Coaxial Connections
BRACKET (OPTION"B")
INPUT
3
1
2
OUTPUT
COUPLED
Applications
+RoHS Compliant
The +Suffix identifies RoHS Compliance. See our web site
for RoHS Compliance methodologies and qualifications
• VHF/UHF
• cellular
• instrumentation
• communication receivers & transmitters
Directional Coupler Electrical Specifications
FREQ.
RANGE
(MHz)
COUPLING
(dB)
MAINLINE LOSS1
DIRECTIVITY
(dB)
VSWR
(:1)
POWER
INPUT
(W)
(dB)
Outline Drawing
L
M
U
L
M
U
L
MU
fL-fU
Nom.
Flatness Typ. Max. Typ. Max. Typ. Max. Typ. Min. Typ. Min. Typ. Min.
0.5 0.4 1.2 0.4 0.8 0.8 1.5 36 28 27 20 23 18
M = mid range [10 fL to fU/2] U= upper range [fU/2 to fU]
Typ.
1.1
Max. Max.
1-1000
19.5 0.5
0.5
2.0
L = low range [fL to 10 fL]
1. Mainline loss includes theoretical power loss at coupled port.
Typical Performance Data
Frequency
(MHz)
Mainline Loss
(dB)
Coupling
(dB)
In-Cpl
Directivity
(dB)
Return Loss
(dB)
In-Out
In
Out
Cpl
1.00
5.00
9.00
96.00
248.00
0.49
0.34
0.33
0.31
0.35
19.58
19.44
19.42
19.42
19.47
43.20
45.40
46.16
41.47
34.00
23.54
27.48
28.13
28.71
29.63
24.84
30.16
31.18
31.90
31.49
24.95
30.85
31.81
31.89
31.18
inch
Outline Dimensions (
)
mm
A
1.25
B
1.25
C
.75
D
.63
E
.38
F
1.00
G
H
420.00
520.00
640.00
840.00
1000.00
0.41
0.46
0.53
0.68
0.84
19.55
19.60
19.66
19.77
19.87
30.27
29.14
28.26
28.03
28.35
31.67
33.53
35.77
35.04
30.50
30.80
30.43
29.99
29.07
27.81
29.73
28.67
27.20
24.87
23.33
.125 1.000
3.18 25.40
31.75 31.75 19.05 16.00
9.65 25.40
J
--
--
K
--
--
L
M
N
2.18
P
.75
Q
wt
.07 grams
1.78 70.0
.125 1.688
3.18 42.88 55.37 19.05
ZFDC-20-4+
MAINLINE LOSS
ZFDC-20-4+
COUPLING & DIRECTIVITY
at RF level of -10 dBm
at RF level of -10 dBm
1.0
0.8
0.6
0.4
0.2
0.0
70
60
50
40
30
20
10
0
COUPLING
DIRECTIVITY
0
200
400
600
800
1000
0
200
400
600
800
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
ZFDC-20-4+
RETURN LOSS
Electrical Schematic
at RF level of -10 dBm
50
42
34
26
18
10
IN
OUT
CPL
0
200
400
600
800
1000
FREQUENCY (MHz)
®
For detailed performance specs
& shopping online see web site
Mini-Circuits
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®
REV. C
M121747
P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661 The Design Engineers Search Engine
Provides ACTUAL Data Instantly at minicircuits.com
ZFDC-20-4+
WZ/TD/CP/AM
120927
IF/RF MICROWAVE COMPONENTS
Notes: 1. Performance and quality attributes and conditions not expressly stated in this specification sheet are intended to be excluded and do not form a part of this specification sheet. 2. Electrical specifications
and performance data contained herein are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions. 3. The parts covered by this specification sheet 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.