Bi-Directional Coupler
50Ω
High Power
-55°C to 100°C
-55°C to 100°C
Coaxial
ZFBDC20-970HP
860 to 970 MHz
Features
• very low insertion loss, 0.1 dB typ.
• excellent directivity, 28 dB typ.
• excellent VSWR, 1.1: typ.
• high power operation, 10W
CASE STYLE: J17
Connectors Model
SMA
ZFBDC20-970HP
BRACKET (OPTION "B")
Price
$79.95
$2.50
Qty.
(1-9)
(1+)
Maximum Ratings
Operating Temperature
Storage Temperature
Coaxial Connections
INPUT
OUTPUT
COUPLED (forward)
COUPLED (reverse)
2
3
1
S
Applications
• VSWR measurement
• power monitoring of cellular transmitters
• power levelling
Bi-Directional Coupler Electrical Specifications
Outline Drawing
FREQ.
(MHz)
COUPLING
(dB)
MAINLINE LOSS
1
(dB)
DIRECTIVITY
(dB)
VSWR
(:1)
POWER
INPUT
(W)
L
Max.
10
MU
Max.
10
f
L
-f
U
860-970
Nom.
20.4±0.6
Flatness
±0.6
Typ. Max.
0.1
0.4
Typ.
28
Min.
20
Typ.
1.1
1. Mainline loss includes theoretical power loss at coupled port.
Typical Performance Data
Frequency
(MHz)
Mainline Loss
(dB)
In-Out
Coupling
(dB)
In-Cpl Fwd
Out-Cpl Rev
Directivity
(dB)
Out-Cpl Fwd
In-Cpl Rev
In
Return Loss
(dB)
Out
Cpl Fwd
Cpl Rev
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
860.00
875.00
885.00
896.25
902.50
908.75
915.00
920.00
957.00
970.00
0.11
0.19
0.17
0.12
0.09
0.08
0.08
0.08
0.07
0.08
20.97
20.96
20.90
20.83
20.81
20.79
20.77
20.76
20.65
20.62
21.06
21.06
21.01
20.95
20.93
20.90
20.89
20.87
20.76
20.73
26.72
26.84
26.96
27.11
27.12
27.26
27.33
27.46
27.87
28.10
22.08
21.99
21.92
21.92
21.84
21.83
21.78
21.77
21.87
21.55
25.04
24.74
24.57
24.37
24.27
24.15
24.06
24.00
23.46
23.30
25.31
24.96
24.75
24.52
24.42
24.29
24.17
24.08
23.47
23.36
28.46
27.84
27.46
27.06
26.87
26.65
26.44
26.29
25.28
24.99
27.67
27.16
26.85
26.50
26.34
26.15
25.96
25.84
24.93
24.66
For option B with N-Type connectors, dimension "C" increases to 0.94 inches.
ZFBDC20-970HP
MAINLINE LOSS
COUPLING & DIRECTIVITY
(dB)
0.3
MAINLINE LOSS (dB)
at RF level of -10 dBm
35
30
25
20
at RF level of -10 dBm
ZFBDC20-970HP
COUPLING & DIRECTIVITY
OUT-CPL FWD
IN-CPL FWD
0.2
0.1
0.0
860 870 880 890 900 910 920 930 940 950 960 970
FREQUENCY (MHz)
15
860 870 880 890 900 910 920 930 940 950 960 970
FREQUENCY (MHz)
30
RETURN LOSS (dB)
28
26
24
at RF level of -10 dBm
ZFBDC20-970HP
RETURN LOSS
OUT
IN
CPL FWD
CPL REV
electrical schematic
IN
OUT
CPL
FORWARD
CPL
REVERSE
22
860 870 880 890 900 910 920 930 940 950 960 970
FREQUENCY (MHz)
Distribution Centers
NORTH AMERICA 800-654-7949 • 417-335-5935 • Fax 417-335-5945 • EUROPE 44-1252-832600 • Fax 44-1252-837010
Mini-Circuits
®
INTERNET
http://www.minicircuits.com
P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661
Mini-Circuits
ISO 9001 & ISO 14001
Certified
REV. OR
M95663
ED-1612
ZFBDC-20-970HP
DJ/TD/CP
060802
Robotics Development
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