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
XDL21
-
1
-
027
Rev B
Delay Line
Description
The XDL21-1-027 is a surface mount delay line that uses a slow wave
coupling structure that maximizes the amount of delay per unit area over
other distributed delay structures. The XDL21-1-027 can be used in
amplifier linearization applications from 2110- 2170MHz. The XDL21-1-027
is ideal for the delay element required in the main loop of feed forward and
in pre-distortion amplifiers. The Xinger® delay lines are a low cost, high
quality alternative to the traditional coaxial and filter solutions presently
available. Parts have been subjected to rigorous qualification testing and
units are 100% tested.
ELECTRICAL SPECIFICATIONS
Frequency (MHz.) 2110-2170
UMTS Band
Mean Delay (nS) 2.7
±
0.05
Deviation from Linear Phase (Degrees
Max)
±
0.5
Amplitude Flatness
(dB p-p) 0.10
Return Loss (dB min) 20
Insertion Loss (dB/nS) 0.60
Power Handling (Watts) 1
Features:
• UMTS Band
• Production Friendly
• Consistent Delay
• Stable over Temperature
• Surface Mountable
• Available in Tape & Reel
• Non-Lead Solder Paste
Compatible
• 100% Tested
ΘJC (°C/watts) 2.73
Specification based on performance of unit properly installed on microstrip printed circuit boards with 50 Ω
nominal impedance. Specifications subject to change without notice.
Mechanical Drawing
XDL21-1-027 Mechanical Outline
Dimensions are in Inches [Millimeters]
.650
±.010
[16.51
±0.25
]
1.000
±.010
[25.40
±0.25
]
Top View (Near-side) Side View
.048
±.005
[1.22
±0.13
]
Bottom View (Far-side)
.498
±.004
[12.65
±0.10
]
Pin 1
Pin 2
GND
GND
Denotes
Array Number
Orientation
Marker Denotes
Pin Location
Tolerances are Non-Cumulative
2X .070
±.004
SQ
[1.78
±0.10
]
2X .037
±.004
[0.94
±0.10
]
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
XDL21
-
1
-
027
Rev B
Typical Performance: 875 to 2175MHz
AVERAGE DELAY
The average delay is defined as the group delay of the input signal through the delay line. 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:
XDL21-1-027 Mounting Footprint
Dimensions are in Inches [Millimeters]
To insure proper electrical and thermal performance
there must be a ground plane with 100%
solder connection underneath the part
.498
[12.65]
.848
[21.54]
2X 50
Transmission
Line
4X .037
[0.94]
Multiple
plated thru holes
to ground
4X .076 SQ
[1.93]
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
-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
-1.4
-1.2
-1
-0.8
-0.6
-0.4
-0.2
0
875 975 1075 1175 1275 1375 1475 1575 1675 1775 1875 1975 2075 2175
Frequency [MHz]
Insertion Loss [dB]
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
XDL21
-
1
-
027
Rev B
Packaging _
Parts are oriented in embossed tape as shown below
Reel
REEL DIMENSIONS (inches [mm])
ØA
B
ØC
1.732 [44.0]
7.0 [177.8]
13.0 [330.2]
500
QUANTITY/REEL
TABLE 1
ØD
0.512 [13.0]
ØD
B
ØA ØC
• Parts are available in both reel and tube
• Quantity of 19 parts available per tube
