JP520S_14 Datasheet, PDF (3/5 Pages) Anaren Microwave – Pico Xinger 20dB Directional Coupler

Model JP520S
Rev A
VSWR & DIRECTIVITY (CONTINUED)
internal meandering of the coupled lines and
limitations of building perfect 50Ω transitions at the
input and output ports of the device are the most
significant factors against perfect VSWR and
directivity. Typically, VSWR and directivity of 1.15:1
and 25 dB respectively are achieved in practice.
INSERTION LOSS
Coupler insertion loss is defined as the log of the
input power divided by the sum of the power at the
two output ports. In practice, typical loss is
approximately 0.20 dB. Specification limits are
somewhat higher due to imperfect test conditions;
surface mount couplers must be tested in test
fixtures that negatively affect results.
MOUNTING
For Xinger surface mount couplers to operate optimally,
there must be 50Ω transmission lines leading to and
from all of the RF ports. To ensure proper electrical
and thermal performance, there must be a ground
plane with 100% solder connection underneath the
part. If either of these two conditions is not satisfied,
insertion loss, coupling, VSWR and directivity may not
meet published specifications.
SUGGESTED FOOTPRINT
To ensure proper electrical and thermal performance
there must be a ground plane with 100%
solder connection underneath the part
PIN CONFIGURATION
The JP520S’s have an orientation marker to denote
either pin 1 or pin 2. When the input port is
identified, the output, coupled and isolated ports are
known automatically. For example, if the input port
for a device was selected to be Pin 1, Pin 2
automatically becomes the output port, Pin 4
becomes the coupled port, and Pin 3 is the isolated
port. Similarly, if Pin 2 was to be selected as the
input port, the adjacent port on the long side (Pin 1)
is the output port, the adjacent port on the short side
(Pin 3) is the coupled port, and the opposite port (Pin
4) is the isolated port. Either port on the same side
as the orientation marker can be selected as the
Multiple
plated thru holes
to ground
.170
[4.32]
input port, as shown in the table, which shows both
pin configurations. The use of pin 1 or pin 2 as the
input port ensures phase consistency as well as
maximum power handling.
4X .034
[0.86]
.120
[3.05]
4X .063 SQ
[1.60]
4X 50
Transmission
Line
Dimensions are in Inches [Millimeters]
JP520S Mounting Footprint
Available on Tape
and Reel For Pick and
Place Manufacturing.
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