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Manufacturing.
Model XDL20-3-050S
Rev. A
Typical Performance: 875 to 2175MHz
AVERAGE DELAY
The average delay is defined as the group delay of the input signal through the delay line. Because the Xinger delay
lines take advantage of a narrow band tuning technique, the average delay over the broad band varies. The lot-to-lot
variation is reflected in the plus/minus tolerance given in specifications.
Refer to Anaren Application Note AAN-232 for further information on Xinger delay lines.
Mounting Guidelines:
In order for Xinger surface mount delay lines to work
optimally, there must be 50Ω transmission lines leading to
and from all of the RF ports. Also, there must be a very
good ground plane under the part with a number of plated
thru holes to ensure proper electrical performance. If any
of these conditions are not satisfied, insertion loss,
average delay and VSWR may not meet published
specifications.
When a surface mount delay line is mounted to a printed
circuit board (PCB), the primary concerns are; insuring
the RF pads of the device are in contact with the circuit
trace of the PCB and the ground plane of neither the
component nor the PCB are in contact with the RF signal.
An example of how
the PCB footprint could look is shown
below. In particular designs, the 50Ω lines need to be
adjusted to the unique dielectric coefficients and
thicknesses as well as varying pick and place equipment
tolerances.
Return Loss
-70
-60
-50
-40
-30
-20
-10
0
875 975 1075 1175 1275 1375 1475 1575 1675 1775 1875 1975 2075 2175
Frequency [MHz]
Return Loss [dB]
Insertion Loss
-3.5
-3
-2.5
-2
-1.5
-1
-0.5
0
875 975 1075 1175 1275 1375 1475 1575 1675 1775 1875 1975 2075 2175
Frequency [MHz]
Insertion Loss [dB]
XDL20-3-050* Mounting Footprint
Dimensions are in Inches [Millimeters]
To ensure proper electrical and thermal performance
there must be a ground plane with 100%
solder connection underneath the part
.848
[21.54]
4X .037
[0.94]
Multiple
plated thru holes
to ground
.848
[21.54]
4X .076 SQ
[1.93]
2X 50
Ω
Transmission
Line
