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
-
8
-
130
Rev. C
Delay Line
Description
The XDL21-8-130 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 XDL21-8-130 can be used in
amplifier linearization applications from 2110 – 2170MHz. The XDL21-8-
130 is ideal for the delay element required in the main loop of feed forward
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) 13
±
0.20
Deviation from Linear Phase (Degrees
Max)
±
0.5
Amplitude Flatness (dB p-p) 0.10
Return Loss (dB min) 17
Insertion Loss (dB/nS) 0.46
Power Handling (Watts) 1
ΘJC (°C/watts) 2.2
Features:
• Production Friendly
• Consistent Delay
• Stable over Temperature
• Surface Mountable
• Available in Tape&Reel
• Non-Lead Solder Paste
Compatible
• 100% Tested
Operating Temp. (º C)
-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.
Mechanical Drawing
Hot
Via
XDL21-8-130 Preliminary Mechanical Outline
Dimensions are in Inches [Millimeters]
Top View (Near-side) Bottom View (Far-side)
Side View
.130
±.013
[3.29
±0.33
]
GND GND
3X .070
±.004
SQ
[1.78
±0.10
]
3X .037
±.004
[0.94
±0.10
]
Denotes
Array Number
.848
±.004
[21.54
±0.10
]
1.848
±.004
[46.94
±0.10
]
2.000
±.010
[50.80
±0.25
]
1.000
±.010
[25.40
±0.25
]
Orientation
Marker Denotes
Pin Location
Tolerances are Non-Cumulative
Pin 1
Pin 2
Hot
Via
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
-
8
-
130
Rev. C
Typical Performance: (@ 25
o
C on test board).
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:
XDL21-8-130 Preliminary Mounting Footprint
Dimensions are in Inches [Millimeters]
To ensure proper electral and thermal performance
there must be a ground plane with 100%
solder connection underneath the part
4X .076 SQ
[1.93]
2X 50
Transmission
Line 4X .037
[0.94]
1.848
[46.94]
.848
[21.54]
Multiple
plated thru holes
to ground
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 insure 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.
Insertion Loss
-5.5
-5
-4.5
-4
-3.5
-3
-2.5
-2
1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500
Frequency (MHz)
Insertion Loss (dB)
Return Loss
-60
-50
-40
-30
-20
-10
0
1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500
Frequency (MHz)
Return 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
-
8
-
130
Rev. C
PACKAGING
Parts are oriented in tape as shown below.
R.118
[R3.00]
.031
[0.80]
2.012
[51.10]
1.020
[25.90]
.012
[0.30]
.165
[4.20]
1.260
[32.00] .079
[2.00]
.157
[4.00]
Ø.059
[Ø1.50]
.069
[1.75]
1.346
[34.20]
2.693
[68.40]
2.835
[72.00]
Xinger
®
Tape & Reel Diagram
