Bi-Directional Coupler
50
Ω
High Power
-55°C to 50°C
-55°C to 100°C
Coaxial
ZFDC-20-1H+
ZFDC-20-1H
BNC version shown
30 to 400 MHz
Features
• high power, up to 25W
• wideband, 30 to 400 MHz
• excellent directivity, 30 dB typ.
• low mainline loss, 0.15 dB typ.
• rugged shielded case
CASE STYLE: J17
Connectors Model
Price
BNC
ZFDC-20-1H(+)
$58.95
SMA
ZFDC-20-1H-S
$63.95
N-TYPE
ZFDC-20-1H-N
$63.95
BRACKET (OPTION"B")
$5.00
Qty.
(1-9)
(1-9)
(1-9)
(1+)
Maximum Ratings
Operating Temperature
Storage Temperature
Coaxial Connections
INPUT
OUTPUT
COUPLED (forward)
COUPLED (reverse)
S
1
3
2
Applications
• VHF/UHF
• instrumentation
• communication receivers & transmitters
• power leveling
+ RoHS compliant in accordance
with EU Directive (2002/95/EC)
The +Suffix identifies RoHS Compliance. See our web site
for RoHS Compliance methodologies and qualifications.
Bi-Directional Coupler Electrical Specifications
Outline Drawing
FREQ.
(MHz)
COUPLING
(dB)
L
f
L
-f
U
30-400
Nom.
20.5±0.5
Flatness
±0.4
Typ.
0.15
Max.
0.4
Typ.
0.15
MAINLINE LOSS
1
(dB)
M
Max.
0.4
U
Typ. Max.
0.3
0.4
L
Typ.
30
Min.
25
DIRECTIVITY
(dB)
M
Typ.
30
Min.
25
U
Typ. Min.
30
23
VSWR POWER
(:1) INPUT, W
L
Max.
25
MU
Max.
25
Typ.
1.2
L= 30-100 MHz
M= 100-200 MHz
U= 200-400 MHz
1. Mainline loss includes theoretical power loss at coupled port.
Typical Performance Data
Frequency
(MHz)
Mainline Loss
(dB)
In-Out
30.00
47.50
65.00
82.50
100.00
150.00
200.00
288.89
333.33
400.00
0.11
0.07
0.07
0.08
0.11
0.16
0.19
0.21
0.23
0.24
Coupling
(dB)
In-Cpl Fwd
20.74
20.68
20.63
20.59
20.59
20.63
20.69
20.77
20.80
20.83
Out-Cpl Rev
20.73
20.66
20.62
20.58
20.58
20.62
20.67
20.74
20.77
20.80
Directivity
(dB)
Out-Cpl Fwd
36.33
36.66
36.97
37.14
37.19
38.74
36.80
33.49
31.88
29.81
In-Cpl Rev
39.08
39.46
39.93
40.58
40.42
38.06
35.64
32.92
31.46
29.45
In
17.88
21.75
24.43
26.31
27.24
27.92
29.69
29.81
29.73
28.38
Return Loss
(dB)
Out
17.93
21.84
24.65
27.05
28.65
30.48
30.30
29.10
28.43
27.54
Cpl Fwd
17.83
22.02
25.33
28.32
30.88
33.62
33.78
30.60
28.85
26.14
Cpl Rev
17.78
21.88
25.13
28.10
30.36
34.39
39.07
35.64
31.36
26.41
Outline Dimensions (
inch
)
mm
A
B
C
D
1.25
1.25
.75
.63
31.75 31.75 19.05 16.00
J
--
--
K
--
--
E
F
.38 1.000
9.65 25.40
G
H
.125 1.000
3.18 25.40
Q
wt
.07 grams
1.78
75.0
L
M
N
P
.125 1.688
2.18
.75
3.18 42.88 55.37 19.05
For option "B" with N-type connectors, dimension "C" increases to 0.94 inches.
ZFDC-20-1H
MAINLINE LOSS
0.4
MAINLINE LOSS (dB)
at RF level of -10 dBm
ZFDC-20-1H
COUPLING & DIRECTIVITY
60
COUPLING & DIRECTIVITY
(dB)
at RF level of -10 dBm
0.3
0.2
0.1
0.0
0
50
100
150
200
250
FREQUENCY (MHz)
300
350
400
50
40
30
20
10
0
0
50
COUPLING IN-CPL FWD
DIRECTIVITY IN-CPL REV
100
FREQUENCY (MHz)
150
200
250
300
350
400
60
RETURN LOSS (dB)
50
40
30
20
10
0
at RF level of -10 dBm
ZFDC-20-1H
RETURN LOSS
IN
OUT
CPL
electrical schematic
IN
OUT
CPL
FORWARD
CPL
REVERSE
50
100
150 200 250 300
FREQUENCY (MHz)
350
400
EW
ALL N
Mini-Circuits
ISO 9001 ISO 14001
CERTIFIED
RF/IF MICROWAVE COMPONENTS
®
minicircuits.com
REV. A
M106924
ZFDC-20-1H
WP/TD/CP/AM
071003
P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661 For detailed performance specs & shopping online see Mini-Circuits web site
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