Model 2H1305-3
Hybrid Couplers
3 dB, 90°
°
Rev. B
The 2H1305-3 is a low profile, high power 3dB hybrid coupler in an easy to
use surface mount package covering the entire DCS and PCS bands. The
2H1305-3 is ideal for balanced amplifiers and signal combining and can be
used in most high power designs. Parts have been subject 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 such as FR4, G-10 and polyimide.
Description
Features:
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ELECTRICAL SPECIFICATIONS**
Frequency
MHz
1805 - 1990 MHz
High Power
Very Low Loss
High Isolation
o
90 Quadrature
Surface Mountable
Lead Free Finish
Tape and Reel
Convenient Package
100% Tested
H-Style
Isolation
dB Min
Insertion
Loss
dB Max
_
VSWR
Max:1
1805 – 1990
Amplitude
Balance
dB Max
22
Phase
Balance
Degrees
0.20
Power
Ave. CW Watts
1.20
Θ
JC
ºC/Watt
Operating
Temp.
ºC
± 0.30
±3
120
26.8
-55 to +85
Outline Drawing
Top View (Near-side)
.650
±.010
[16.51
±0.25
]
Pin 1
**Specification based on performance of unit properly installed on microstrip printed circuit boards
with 50
Ω
nominal impedance. Specifications subject to change without notice.
Bottom View (Far-side)
.135
±.014
[3.42
±0.36
]
Pin 2
Pin 2
4X .024
±.004
[0.61
±0.10
]
Pin 1
GND
GND
.480
±.010
[12.19
±0.25
]
.380
±.004
[9.65
±0.10
]
4X .044
±.004
SQ
[1.12
±0.10
]
.550
±.004
[13.97
±0.10
]
Pin 4
Denotes
Array Number
Pin 3
Pin 3
Pin 4
Dimensions are in Inches [Millimeters]
2H1305-3 Mechanical Outline
Part is Symmetric About All Axis
Tolerances are Non-Cumulative
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 2H1305-3
Rev. B
Typical Performance: 1500 MHz. to 2400 MHz.
AMPLITUDE BALANCE
3dB hybrids are a type of backward wave coupler. In
the design of these couplers, the even mode
impedance was chosen to ‘critically couple’ or slightly
‘over couple’ at mid band to maximize performance and
bandwidth. The amplitude balance specification is
defined as the decibel difference between the two
output curves.
PHASE BALANCE
In theory, output ports of a backward wave hybrid
coupler remain in perfect phase quadrature
independent of frequency.
In practice, factors
associated with the manufacturing processes slightly
degrade performance. The specification is typically two
to three degrees maximum. In practice, phase balance
is statistically better than specified (<1
o
).
VSWR & ISOLATION
Similar to phase balance, the VSWR and isolation of
a coupler are theoretically perfect; where 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 isolation. The significant
limitations are associated with limitations of building
perfect 50
Ω
transitions at the input and output ports
of the device.
INSERTION LOSS
Coupler insertion loss is defined as the difference of
the input power from the sum of the output power. In
practice, loss is typically 0.20 dB. Specification limits
are somewhat higher due to imperfect test
conditions; as the couplers must be tested in fixtures
that negatively affect results.
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 2H1305-3
PIN CONFIGURATION
Rev. B
electrical and mechanical stability having X and Y
o
thermal coefficient of expansion (CTE) of 17 ppm/ C.
When a surface mount hybrid coupler is mounted to a
printed circuit board, the primary concerns are;
ensuring the RF pads of the device are in contact with
the circuit trace of the PCB and insuring the ground
plane of neither the component nor the PCB is in
contact with the RF signal. As long as the geometry
of the unit fits onto the layout of the circuit trace on
the PCB, and the conditions of the previous
paragraph are followed, the coupler’s performance is
ensured. An example of how the PCB footprint could
look is shown below. In specific designs, the 50
Ω
lines need to be adjusted to the unique dielectric
coefficients and thicknesses as well as varying pick
and place equipment tolerances. To ensure proper
electrical and thermal performance there must be a
ground plane with 100% solder connection
underneath the part.
SUGGESTED FOOTPRINT
To ensure proper electrical and thermal performance
there must be a ground plane with 100%
solder connection underneath the part
All of the standard surface mount 3dB hybrid couplers
have pin orientations that are symmetrical. When a port
is designated as the input, automatically the two output
and isolated ports are defined. For example, if the input
port for a device was selected to be Pin 1, Pin 2 is
automatically the isolated port, Pin 4 is the 0 degree
reference output port, and Pin 3 is the output port which
“lags” behind the reference output port by 90 degrees.
Similarly, if Pin 3 was to be selected as the input port,
the adjacent port on the long side (Pin 4) is the isolated
port, the adjacent port on the short side (Pin 2) is the 0
degree output port, and the opposite port (Pin 1) is the -
90 degree output port. Below is a table of all possible
orientations.
MOUNTING
In order for Xinger surface mount couplers to work
optimally, there must be 50
Ω
transmission lines leading
to and from all of the RF ports. Also, there must be a
very good ground plane under the part to ensure proper
electrical performance. If either of these two conditions
are not satisfied, insertion loss, coupling, VSWR and
isolation may not meet published specifications.
Overall ground is improved if a dense population of
plated through holes connect the top and bottom ground
layers of the PCB. This minimizes ground inductance
and improves ground continuity. All of the Xinger hybrid
and directional couplers are constructed from ceramic
filled PTFE composites that possess excellent
Part is Symmetric About All Axis
Multiple
plated thru holes
to ground
.550
[13.97]
.380
[9.65]
4X .034
[0.86]
4X .063 SQ
[1.60]
4X 50
Transmission
Line
Dimensions are in Inches [Millimeters]
2H1305-3 Mounting Footprint
Available on Tape
and Reel For Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe
:
(315) 432-8909
(800) 544-2414
+44 2392-232392
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