Available on Tape
and Reel For Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 544-2414
+44 2392-232392
Model 11303-20
Rev.
A
`
Directional Couplers
20 dB
Description
The 11303-20 is a low profile 20dB directional coupler in an easy to use
surface mount package designed for the 380 to 520 MHz bandwidth. The
11303-20 is ideal for power and frequency detection as well as VSWR
monitoring and can be used in most high power designs. Parts have been
subjected to rigorous qualification testing and units are 100% tested. They
are manufactured using materials with x and y thermal expansion
coefficients compatible with common substrates such as FR4, G-10 and
polyamide.
ELECTRICAL SPECIFICATIONS**
Frequency Mean
Coupling
Insertion
Loss VSWR Freq.
Sensitivity
MHz dB dB Max Max:1 dB Max
380 - 520 20.5 ± 1.5 0.30 1.2 ±0.8
Directivity Power
Handling ΘJC Operating
Temp.
dB Min Watts ºC / Watt ºC
Features:
• 380 - 520 MHz
• Low loss
• High Directivity
• Surface Mountable
• Tape And Reel
• Convenient Package
• 100% Tested
18 50 3.7 -55 to +85
**Specification based on performance of unit properly installed on microstrip printed circuit
boards with 50 Ω nominal impedance. Specifications subject to change without notice.
Outline Drawing
11303-20 Rev A Mechanical Outline
Dimensions are in Inches [Millimeters]
Bottom View (Far-side)
Side View
Top View (Near-side)
.073±.008
[1.85±0.20]
Pin 2
Pin 3
Pin 1
Pin 4
.650±.010
[16.51±0.25]
.480±.010
[12.19±0.25]
Denotes
Array Number
GND
Pin 1
Pin 4
Pin 3
Pin 2
GND
.024±.004 TYP
[0.61±0.10]
.050±.008
[1.27±0.20]
Part Is Symmetric About All Axis
.050±.008
[1.27±0.20]
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 544-2414
+44 2392-232392
Available on Tape and
Reel For Pick and Place
Manufacturing.
Model 11303-20
Rev. A
Typical Performance: 300 MHz. to 600 MHz.
Coupling 11303-20
-23
-22.5
-22
-21.5
-21
-20.5
-20
300 350 400 450 500 550 600
Frequency (MHz)
Coupling (dB)
Return Loss 11303-20
-60
-50
-40
-30
-20
-10
300 350 400 450 500 550 600
Frequency (MHz)
Return Loss (dB)
Directivity 11303-20
-50
-40
-30
-20
-10
300 350 400 450 500 550 600
Frequency (MHz)
Directivity (dB)
Transmission Loss 11303-20
-0.5
-0.4
-0.3
-0.2
-0.1
0
300 350 400 450 500 550 600
Frequency (MHz)
Transmission Loss (dB)
Pin Configuration Mounting Footprint
To ensure proper electrical and thermal performance
there must be a ground plane with 100%
solder connection underneath the part
Dimensions are in Inches [Millimeters]
11303-20 Rev A Mountin
g
Foot
p
rint
50 Ω
Transmission
Line
.063 SQ TYP
[1.60]
.034 TYP
[0.86]
Part Is Symmetric About All Axis
.380
[9.65]
.550
[13.97]
Multiple
plated thru holes
to ground
