Notes
A.
Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document.
B.
Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions.
C.
The parts covered by this specification document 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
Mini-Circuits®
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Typical Performance Data
Directional Coupler Electrical Specications
Maximum Ratings
Coaxial Connections
INPUT 3
OUTPUT 2
COUPLED 1
Operating Temperature -55°C to 100°C
Storage Temperature -55°C to 100°C
Outline Drawing
Outline Dimensions ( )
inch
mm
ZDC-20-1
MAINLINE LOSS
0.0
0.1
0.2
0.3
0.4
25 100 175 250 325 400
FREQUENCY (MHz)
MAINLINE LOSS (dB)
at RF level of -10 dBm
ZDC-20-1
COUPLING & DIRECTIVITY
0
10
20
30
40
50
60
70
25 100 175 250 325 400
FREQUENCY (MHz)
COUPLING & DIRECTIVITY
(dB)
COUPLING DIRECTIVITY
at RF level of -10 dBm
ZDC-20-1+
ZDC-20-1
ZDC-20-1
RETURN LOSS
10
18
26
34
42
50
25 100 175 250 325 400
FREQUENCY (MHz)
RETURN LOSS (dB)
IN OUT CPL
at RF level of -10 dBm
50Ω 25 to 400 MHz
Directional Coupler
REV. B
M137477
ZDC-20-1
WZ/TD/CP/AM
131017
Coaxial
A BCD E FGH
2.25 1.38 1.24 .50 .150 3.100 .138 1.238
57.15 35.05 31.50 12.70 3.81 78.74 3.51 31.45
J K L M N P S wt
3.25 .10 .40 1.15 1.86 .64 .150 grams
82.55 2.54 10.16 29.21 47.24 16.26 3.81 74.0
CASE STYLE: M22
Connectors Model Price Qty.
BNC ZDC-20-1(+) $51.95 ea. (1-9)
BRACKET (OPTION"B") $5.00 (1+)
BRACKET (OPTION"BR") $1.50 (1+)
L = 25-50 MHz M = 50-300 MHz U= 300-400 MHz
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 LOSS1
(dB)
DIRECTIVITY
(dB)
VSWR
(:1)
POWER
INPUT
(W)
L M U L M U L MU
fL-fUNom. Flatness Typ. Max. Ty p. Max. Ty p. Max. Ty p . Min. Ty p. Min. Ty p. Min. Ty p. Max. Max.
25-400 20±0.5 ±0.5 0.2 0.25 0.3 0.35 0.35 0.5 25 20 35 25 25 20 1.25 3.0 5.0
Features
• excellent directivity, 35 dB typ.
• excellent mainline loss, 0.3 dB typ.
• high input power, up to 5W max.
• rugged shielded case
Applications
• VHF/HF
• instrumentation
• communication receivers & transmitters
• amateur radio
25.00 0.13 19.97 35.76 34.28 33.88 39.90
45.00 0.14 19.98 35.38 33.99 31.38 38.66
80.00 0.14 19.98 34.30 33.78 27.78 36.78
120.00 0.14 20.01 33.33 34.16 24.90 35.11
160.00 0.14 20.02 32.39 33.90 22.55 33.12
210.00 0.15 20.08 30.90 34.23 20.48 31.35
260.00 0.15 20.13 29.21 33.58 18.79 29.50
310.00 0.10 20.15 27.48 32.70 17.46 28.08
360.00 0.15 20.23 25.48 31.39 16.45 26.85
400.00 0.21 20.28 24.37 29.89 15.74 26.00
Electrical Schematic
Permanent damage may occur if any of these limits are exceeded.
+RoHS Compliant
The +Suffix identifies RoHS Compliance. See our web site
for RoHS Compliance methodologies and qualifications
