Surface Mount
NEW!
Directional Couplers
DBTC-9-4 DBTC-9-4L
50Ω
5 to 1000 MHz
Maximum Ratings
OperatingTemperature
StorageTemperature
Features
• very flat coupling
-40°C to 85°C
-55°C to 100°C
No Leads
Leads
• very broadband, multi octave
• temperature stable, BLUE CELL™ base
• all welded construction
• loads attached for better solderability
• micro-miniature coupler
CASE STYLE:AT790-1
PRICE: $1.99 ea. QTY (25)
$1.69 ea. QTY (1000)
CASE STYLE:AT1030
PRICE: $2.14 ea. QTY (25)
$1.84 ea. QTY (1000)
Pin Connections
INPUT
3
4
• protected by U.S. Patent 6,140,887 & 6,784,521
OUTPUT
COUPLED
1
GROUND
2
Applications
• VHF/UHF receivers/transmitters
• cellular
NOT USED*
*pins 5&6 must be isolated
5,6
Directional Coupler Electrical Specifications
Outline Drawing
AT790-1
FREQ.
RANGE
(MHz)
COUPLING
(dB)
MAINLINE LOSS*
(dB)
DIRECTIVITY
(dB)
VSWR** POWER
(:1)
INPUT, W
Max.
L
M
U
L
M
U
L
MU
fL-fU
Nom.
9.0±0.5
Flatness
Typ. Max. Typ. Max. Typ. Max. Typ. Min. Typ. Min. Typ. Min.
Typ.
1.20
Max. Max.
5-1000
±0.5
1.2 2.0 1.2 1.8 1.5 2.0 21 17 18 13 15
—
0.5 1.0
*
Includes theoretical coupled power loss of 0.58 dB at 9 dB coupling.
L = low range [fL to 10 fL] M = mid range [10 fL to fU/2]
U = upper range [fU/2 to fU]
**For coupled port VSWR above 500 MHz, 1.6:1 typ.
AT1030
Typical Performance Data
Frequency
(MHz)
InsertionLoss
(dB)
Coupling
(dB)
In-Cpl
Directivity
(dB)
Return Loss
(dB)
Out
In-Out
In
Cpl
5.00
10.00
50.00
100.00
300.00
500.00
600.00
800.00
900.00
1000.00
1.18
1.10
1.07
1.09
1.16
1.20
1.23
1.31
1.37
1.43
8.93
8.89
8.87
8.90
8.93
8.90
8.88
8.86
8.85
8.86
21.62
21.70
21.50
20.99
19.47
17.60
16.50
14.74
14.07
13.44
17.90
19.15
20.07
20.12
20.49
21.02
20.89
20.45
20.06
19.34
24.67
29.04
32.70
31.81
30.43
30.62
30.39
30.31
29.26
27.16
18.40
19.50
20.22
20.27
18.93
16.66
15.36
12.91
11.86
10.86
AT790-1 & AT1030
inch
Outline Dimensions (
)
J
mm
AT790-1
A
B
C
D
E
F
G
H
K
wt.
grams
.10
.150 .150 .150 .050 .030 .025 .028 .050 .160 .030
3.81 3.81 3.81 1.27 0.76 0.64 0.71 1.27 4.06 0.76
DBTC-9-4L
INSERTION LOSS
DBTC-9-4L
COUPLING & DIRECTIVITY
at RF level of -10 dBm
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
25
20
15
10
5
AT1030
A
B
C
D
E
F
G
H
J
K
L
wt.
.166 .150 .155 .050 .037 .025 .012 .060 .184 .030 .004 grams
4.22 3.81 3.94 1.27 0.94 0.64 0.30 1.52 4.67 0.76 0.10
.10
Reflow Solder Assembly
Silver-bearing solder (Sn/Pb/Ag 62/36/2%) is recommended;
however, tin-lead eutectic (Sn/Pb 63/37%) may be used.
For temperature profiles, see Application Note AN-40-004
COUPLING
400
DIRECTIVITY
600 800
Demo Board MCL P/N: TB-278
Suggested PCB Layout (PL-150)
0
0
200
1000
0
200
400
600
800
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
DBTC-9-4L
RETURN LOSS
35
30
25
20
15
10
5
IN
OUT
CPL
0
0
200
400
600
800
1000
FREQUENCY (MHz)
®
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