Model XMC2560E-03

Rev B

USA/Canada:

Toll Free:

Europe:

(315) 432-8909

(800) 411-6596

+44 2392-232392

Available on Tape and

Reel for Pick and Place

Manufacturing.

the interface pad will have less capacitive reactance than the Anaren test board. In this case, a wider section of line

before the interface pad (or a larger interface pad) will introduce a shunt capacitance and when properly tuned will

match the performance of the Anaren test board.

The

entry

angle

of

the

traces

has

a

significant impact on the RF performance

and these parts have been optimized for the

layout used on the test boards shown

below.

Testing Sample Parts Supplied on Anaren Test Boards

If you have received a coupler installed on an Anaren produced microstrip test board, please remember to remove the

loss of the test board from the measured data. The loss is small enough that it is not of concern for Return Loss and

Isolation/Directivity, but it should certainly be considered when measuring coupling and calculating the insertion loss

of the coupler. An S-parameter file for a “Thru” board (see description of “Thru” board above) will be supplied upon

request. As a first order approximation, one should consider the following loss estimates:

Frequency Band

Avg. Ins. Loss of Test Board @ 25

°C

2500 MHz

~ 0.29dB

4000 MHz

~ 0.41dB

6000 MHz

~ 0.57dB

For example, a 4300MHz, 10dB coupler on a test board may measure –10.60dB from input to the coupled port at

frequency F1=4000 MHz. When the loss of the test board is removed, the coupling at F1 becomes -10.19dB (-

10.60dB + 0.41dB). This compensation must be made to both the coupled and direct path measurements when

calculating insertion loss.

The loss estimates in the table above come from room temperature measurements. It is important to note that the

loss of the test board will change with temperature. This fact must be considered if the coupler is to be evaluated at

other temperatures.

Orientation Marker

A printed circular feature appears on the top surface of the coupler to designate Pin 1. This orientation marker is not

intended to limit the use of the symmetry that these couplers exhibit but rather to facilitate consistent placement of

these parts into the tape and reel package. This ensures that the components are always delivered with the same

orientation. Refer to the table on page 2 of the data sheet for allowable pin configurations.