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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.
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IF/RF MICROWAVE COMPONENTS
Outline Drawing
Typical Performance Data
Directional Coupler Electrical Specifications
Maximum Ratings
Coaxial Connections
INPUT 3
OUTPUT 1
COUPLED 2
Operating Temperature -55°C to 100°C
Storage Temperature -55°C to 100°C
Outline Dimensions ( )
inch
mm
ZFDC-20-50+
MAINLINE LOSS
0.0
0.4
0.8
1.2
1.6
2.0
0 400 800 1200 1600 2000
FREQUENCY (MHz)
MAINLINE LOSS (dB)
at RF level of -10 dBm
ZFDC-20-50+
COUPLING & DIRECTIVITY
0
10
20
30
40
50
60
0 400 800 1200 1600 2000
FREQUENCY (MHz)
COUPLING & DIRECTIVITY
(dB)
COUPLING DIRECTIVITY
at RF level of -10 dBm
ZFDC-20-50+
ZFDC-20-50+
RETURN LOSS
0
10
20
30
40
50
60
0 400 800 1200 1600 2000
FREQUENCY (MHz)
RETURN LOSS (dB)
IN OUT CPL
at RF level of -10 dBm
50Ω 20 to 2000 MHz
Directional Coupler
REV. C
M119986
ZFDC-20-50+
WZ/TD/CP/AM
090917
Coaxial
A
B
C
D
E
F
G
H
1
1
.
.
.
1
.
1
J
K
L
M
N
P
Q
w
-
-
.
1
2
.
.
g
7
CASE STYLE: K18
Connectors Model Price Qty.
SMA ZFDC-20-50-S+ $64.95 (1-9)
BRACKET (OPTION"B") $2.50 (1+)
L = low range [fL to 10 fL] M = mid range [10 fL to fU/2] U= upper range [fU/2 to fU]
1. Mainline loss includes theoretical power loss at coupled port.
* Above 1000 MHz, coupling flatness ±1 dB
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 LOSS1
(dB)
DIRECTIVITY
(dB)
VSWR
(:1)
POWER
INPUT
(W)
L M U L M U L MU
fL-fUNom. Flatness Typ. Max. Typ. Max. Typ. Max. Typ. Min. Typ. Min. Typ. Min. Typ. Max. Max.
20-2000 19.5±0.5 ±0.8 0.8 1.3 0.7 1.3 1.0 1.6 30 20 25 20 22 10 1.25 1.0 1.0
Features
• very wideband, 20 to 2000 MHz
• excellent directivity, 25 dB typ.
• excellent mainline loss, 0.7 dB typ.
• rugged shielded case
Applications
• cellular
• GPS
• instrumentation
• communication receivers & transmitters
20.00 0.82 19.36 29.25 17.95 19.33 21.82
50.00 0.65 19.21 33.94 21.29 23.63 24.42
80.00 0.65 19.19 34.88 22.44 25.39 25.30
100.00 0.60 19.14 35.01 22.93 26.11 25.66
300.00 0.66 19.18 31.17 25.70 28.22 28.13
1000.00 0.86 19.37 23.02 24.12 32.91 28.50
1200.00 1.00 19.40 22.32 20.46 32.70 24.27
1400.00 1.09 19.40 21.99 17.71 30.28 21.55
1600.00 1.27 19.35 21.75 15.67 27.28 19.50
1800.00 1.34 19.36 21.00 14.04 24.37 17.79
2000.00 1.46 19.37 19.19 12.70 21.84 16.24
Electrical Schematic
+ RoHS compliant in accordance
with EU Directive (2002/95/EC)
The +Suffix has been added in order to identify RoHS
Compliance. See our web site for RoHS Compliance
methodologies and qualifications.
Permanent damage may occur if any of these limits are exceeded.