Surface Mount
DBTC-20-4L+
Directional Couplers
DBTC-20-4+
50Ω
20 to 1000 MHz
Maximum Ratings
OperatingTemperature
StorageTemperature
Features
• very flat coupling
-40°C to 85°C
-55°C to 100°C
• very broadband, multi octave
• temperature stable, BLUE CELL™ base
• all welded construction
• leads attached for better solderability
• micro-miniature coupler
No Leads
Leads
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)
PinCCoonnnneeccttiioonnss
INPUT
3
4
1
2
6
• protected by patent 6,140,887
• additional patent pending
+ RoHS compliant in accordance
with EU Directive (2002/95/EC)
OUTPUT
COUPLED
The+suffixhasbeenaddedinordertoidentify RoHS
Compliance. Therehasbeennochangetothemodel's
material, form, fit, or function. See our web site for RoHS
Compliancemethodologiesandqualifications.
Applications
• VHF/UHF receivers/transmitters
• cellular
GROUND
NOTUSED(ISOLATE)
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.
20.4±0.6
Flatness
Typ. Max. Typ. Max. Typ. Max. Typ. Min. Typ. Min. Typ. Min.
Typ.
1.20
Max. Max.
20-1000
±0.8
0.3 1.0 0.4 1.0 0.7 1.3 21 13 21 14 16
—
1.0 1.0
L = low range [fL to 10 fL] M = mid range [10 fL to fU/2]
U = upper range [fU/2 to fU]
*
Includes theoretical coupled power loss of 0.04 dB at 20 dB coupling.
**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
20.00
30.00
50.00
100.00
300.00
500.00
600.00
800.00
900.00
1000.00
0.29
0.29
0.30
0.32
0.39
0.45
0.48
0.56
0.60
0.64
20.12
20.11
20.13
20.15
20.14
20.07
20.03
20.01
20.04
20.10
22.25
22.42
22.62
23.19
28.43
30.35
24.01
17.74
15.81
14.29
29.48
29.72
30.01
29.64
27.24
25.95
25.55
25.02
25.47
26.13
32.81
33.13
33.06
32.17
27.52
25.13
24.85
24.96
26.00
27.33
27.78
27.93
27.84
27.03
22.09
18.13
16.59
13.97
12.90
11.90
AT790-1 & AT1030
inch
Outline Dimensions (
)
J
mm
BLUE CELL™ is protected by U.S. Patents.
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-20-4L
DBTC-20-4L
INSERTION LOSS
COUPLING & DIRECTIVITY
at RF level of -10 dBm
AT1030
A
B
C
D
E
F
G
H
J
K
L
wt.
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
35
30
25
20
15
10
5
.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
Demo Board MCL P/N: TB-278
Suggested PCB Layout (PL-150)
COUPLING
DIRECTIVITY
800 1000
0
0
0
200
400
600
800
1000
200
400
600
FREQUENCY (MHz)
FREQUENCY (MHz)
DBTC-20-4L
RETURN LOSS
at RF level of -10 dBm
35
30
25
20
15
10
5
IN
OUT
COUPLING
800 1000
0
0
200
400
600
FREQUENCY (MHz)
REV.G
M98898
DBTC-20-4+ ED-8957/1
DBTC-20-4 ED-8957/1
DBTC-20-4L+ED-8957A/1
DBTC-20-4L ED-8957A/1
WZ/TD/CP
®
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