Coaxial
Directional Coupler
ZFDC-10-21
50Ω
1 to 1000 MHz
Maximum Ratings
Operating Temperature
Storage Temperature
Features
BNC version shown
• wideband, 1 to 1000 MHz
-55°C to 100°C
-55°C to 100°C
• excellent directivity, 25 dB typ.
• rugged shielded case
CASE STYLE: K18
Permanent damage may occur if any of these limits are exceeded.
Connectors Model
Coaxial Connections
BNC
ZFDC-10-21
Applications
INPUT
1
2
3
SMA
N-TYPE
ZFDC-10-21-S
ZFDC-10-21-N
• VHF/UHF
OUTPUT
COUPLED
BRACKET (OPTION"B")
• cellular
• instrumentation
• communications 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 1.2 2.1 1.2 1.7 1.6 2.0 40 30 25 20 25 20
M = mid range [10 fL to fU/2] U= upper range [fU/2 to fU]
Typ.
1.2
Max. Max.
1-1000
11±0.5
1.0
2.0
L = low range [fL to 10 fL]
1. Mainline loss includes theoretical power loss at coupled port.
* Upper range coupling flatness ±0.75 dB
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
127.00
283.00
1.40
1.10
1.06
1.09
1.13
11.11
10.69
10.64
10.63
10.67
57.10
57.53
58.41
53.14
41.08
19.66
29.35
33.22
35.93
33.11
15.47
18.65
19.11
19.06
18.61
14.40
17.89
18.54
18.61
17.79
inch
Outline Dimensions (
)
mm
A
1.25
B
1.25
C
.75
D
.63
E
.38
F
1.00
G
H
440.00
540.00
678.00
873.00
1000.00
1.15
1.32
1.38
1.48
1.70
10.67
10.77
10.77
10.76
10.84
34.18
31.02
27.90
24.75
23.41
32.39
32.13
29.33
23.76
20.67
17.97
17.66
17.37
17.46
17.70
16.96
16.67
16.50
17.00
17.66
.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-10-21
MAINLINE LOSS
ZFDC-10-21
COUPLING & DIRECTIVITY
at RF level of -10 dBm
at RF level of -10 dBm
2.0
1.6
1.2
0.8
0.4
0.0
100
80
60
40
20
0
COUPLING
DIRECTIVITY
0
200
400
600
800
1000
1
10
100
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
ZFDC-10-21
RETURN LOSS
Electrical Schematic
at RF level of -10 dBm
50
42
34
26
18
10
IN
OUT
CPL
1
10
100
1000
FREQUENCY (MHz)
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
REV. B
M151107
ZFDC-10-21
WZ/TD/CP/AM
151007
®
Mini-Circuits
www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com