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 1P503S

Rev. B

PIN CONFIGURATION

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

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, which possess excellent

electrical and mechanical stability having X and Y

thermal coefficient of expansion (CTE) of 17 ppm/

When a surface mount hybrid coupler is mounted to a

printed circuit board, the primary concerns are;

insuring 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.

lines need to be adjusted to the unique dielectric

coefficients and thicknesses as well as varying pick

and place equipment tolerances.

SUGGESTED FOOTPRINT

1P503S Mounting Footprint

Dimensions are in Inches [Millimeters]

Part Is Symmetric About All Axis

.174

[4.42]

.124

[3.15]

4X 50

Transmission

Line

To ensure proper electrical and thermal performance

there must be a ground plane with 100%

solder conection underneath the part

4X .045 SQ

[1.14]

4X .024

[0.61]

4X .099

[2.51]

4X .024 [0.61]

Multiple

plated thru holes

to ground