Microsoft Word - 1P520 Rev A Data Sheet.doc
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 1P520
Rev A
Pico Xinger
20dB Directional Coupler
Description
The 1P520 Pico Xinger is a low profile, miniature 20dB directional coupler
in an easy to use surface mount package designed for DCS and PCS
applications. The 1P520 is for power and frequency detection as well as
power injection. The 1P520 is an ideal solution for the ever-increasing
demands of the wireless industry for smaller printed circuit boards and high
performance. 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.
ELECTRICAL
SPECIFICATIONS**
Frequency
Mean
Coupling
Insertion
Loss
VSWR
Freq.
Sensitivity
GHz
dB
dB Max
Max : 1
dB Max
1.7 2.0
20 0.75
0.25
1.22
0.2
Directivity
Power
Handling
JC
Operating
Temp.
dB Min
Ave CW Watts
C / Watt
C
Features:
1.7 2.0 GHz
DCS and PCS
Very Low Loss
High Directivity
Surface Mountable
Tape and Reel
New Pico-Package
100% Tested
20
25
35
-55 to +85
**Specification based on performance of unit properly installed on microstrip printed circuit
boards with 50
nominal impedance. Specifications subject to change without notice.
1P520 Rev A Mechanical Outline
Dimensions are in Inches [Millimeters]
.250
.010
[6.35
0.25
]
.200
.010
[5.08
0.25
]
.066
.007
[1.67
0.18
]
Top View (Near-side)
Side View
Bottom View (Far-side)
Pin 4
Pin 1
Pin 2
Pin 3
Pin 1
Pin 4
Pin 3
Pin 2
4X .020
.004
[0.51
0.10
]
GND
4X .034
.004
SQ
[0.86
0.10
]
Orientation
Marker Denotes
Pin Location
.120
.004
[3.05
0.10
]
.170
.004
[4.32
0.10
]
GND
Tolerances are Non-Cumulative
Denotes
Array Number
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 1P520
Rev A
Typical Performance: 1.4 GHz. 2.3 GHz.
Coupling 1P520
-21.5
-21.0
-20.5
-20.0
-19.5
1400
1600
1800
2000
2200
Frequency (MHz)
C
oup
l
i
n
g (
d
B
)
Return Loss 1P520
-50
-40
-30
-20
-10
0
1400
1600
1800
2000
2200
Frequency (MHz)
R
e
t
u
r
n
L
o
ss (
d
B
)
Directivity 1P520
-50
-40
-30
-20
-10
0
1400
1600
1800
2000
2200
Frequency (MHz)
D
i
r
e
c
t
iv
it
y
(
d
B
)
Transmission Loss 1P520
-0.25
-0.20
-0.15
-0.10
-0.05
0.00
1400
1600
1800
2000
2200
Frequency (MHz)
T
r
a
n
sm
i
ssi
o
n
L
o
ss (
d
B
)
COUPLING
Choice of a coupling value in an application normally
depends on the power level of the main (sampled) line.
For example, if the coupler is being used to monitor main
line power, the coupling value is selected to provide
sufficient power to the monitoring device and yet
minimize system loss. Note that any coupler reduces
power flowing in the main line by the amount coupled off;
a 10dB coupler reduces main line power by 1 dB (10%)
where a 20dB coupler reduces it by only 0.044dB (1%).
Anaren uses mean coupling and frequency sensitivity
with the coupling specification. The mean coupling value
is arrived at by periodically sampling the coupling value
over the specified band and averaging the readings.
Frequency
sensitivity is the peak to peak variation in
coupling over the specified band.
VSWR & DIRECTIVITY
In directional couplers, directivity is specified in lieu of
isolation. Directivity is a measure of how well the coupled
power is isolated from reflections at the main line output
port. For example, open or short circuiting the output port
of a coupler with 20dB directivity would only affect the
coupled output power by 1% and only 0.1% for 30dB
directivity. High directivity is especially important if the
coupler is being used to measure the VSWR of a device
at its output port. In this application, accurate
measurements of forward and reverse power are
required.
In theory, VSWR and directivity characteristics of a
coupler are perfect; the input and output ports are
perfectly matched and no power is coupled to the isolated
port. In practice, factors associated with the design and
manufacturing processes limit VSWR and directivity. The
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 1P520
Rev A
VSWR & DIRECTIVITY (CONTINUED)
internal meandering of the coupled lines and
limitations of building perfect 50
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.
PIN CONFIGURATION
The 1P520'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 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.
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