Coaxial
Directional Coupler
50Ω
ZFDC-10-21
1 to 1000 MHz
Maximum Ratings
Operating Temperature -55°C to 100°C
Storage Temperature -55°C to 100°C
Features
• wideband, 1 to 1000 MHz
• excellent directivity, 25 dB typ.
• rugged shielded case
Permanent damage may occur if any of these limits are exceeded.
Coaxial Connections
BNC version shown
CASE STYLE: K18
ConnectorsModel
BNCZFDC-10-21
SMA
ZFDC-10-21-S
N-TYPEZFDC-10-21-N
BRACKET (OPTION"B")
Applications
INPUT1
OUTPUT2
COUPLED3
• VHF/UHF
• cellular
• instrumentation
• communications receivers & transmitters
Directional Coupler Electrical Specifications
FREQ.
RANGE
(MHz)
Outline Drawing
COUPLING*
(dB)
MAINLINE LOSS1
(dB)
L
fL-fU
Nom.
Flatness
1-1000
11±0.5
±0.5
M
DIRECTIVITY
(dB)
U
L
Typ. Max. Typ. Max. Typ. Max. Typ.
1.2
2.1
1.2
1.7
1.6
2.0
VSWR
(:1)
M
L
MU
Min.
Typ.
Min.
Typ.
Min.
Typ.
Max.
Max.
30
25
20
25
20
1.2
1.0
2.0
40
U
POWER
INPUT
(W)
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.
* Upper range coupling flatness ±0.75 dB
Typical Performance Data
Frequency
(MHz)
Outline Dimensions ( inch
mm )
A
1.25
31.75
B
1.25
31.75
C
.75
19.05
D
.63
16.00
E
.38
9.65
F
1.00
25.40
G
.125
3.18
H
1.000
25.40
J
---
K
---
L
.125
3.18
M
1.688
42.88
N
2.18
55.37
P
.75
19.05
Q
wt
.07 grams
1.78
70.0
Mainline Loss
(dB)
In-Out
Coupling
(dB)
In-Cpl
Directivity
(dB)
In
Return Loss
(dB)
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
19.6615.4714.40
29.3518.6517.89
33.2219.1118.54
35.9319.0618.61
33.1118.6117.79
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
32.3917.9716.96
32.1317.6616.67
29.3317.3716.50
23.7617.4617.00
20.6717.7017.66
ZFDC-10-21
MAINLINE LOSS
1.6
1.2
0.8
0.4
0.0
10
100
FREQUENCY (MHz)
1000
DIRECTIVITY
60
40
20
0
200
400
600
FREQUENCY (MHz)
800
1000
Electrical Schematic
ZFDC-10-21
RETURN LOSS
at RF level of -10 dBm
IN
RETURN LOSS (dB)
COUPLING
80
0
1
50
at RF level of -10 dBm
100
COUPLING & DIRECTIVITY
(dB)
2.0
MAINLINE LOSS (dB)
ZFDC-10-21
COUPLING & DIRECTIVITY
at RF level of -10 dBm
OUT
CPL
42
34
26
18
10
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
Mini-Circuits
®
www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com
REV. B
M151107
ZFDC-10-21
WZ/TD/CP/AM
151007