Product Specification

PE42720

Page 8 of 11

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Figure 19. Evaluation Board Layout

Evaluation Kit

The SPDT switch evaluation board was designed to

ease customer evaluation of Peregrine’s PE42720.

The RF common port is connected through a 75Ω

transmission line via the F-Type connector, J2. RF1

and RF2 ports are connected through 75Ω

transmission lines via F-Type connectors J1 and J3,

respectively. A 75Ω through transmission line is

available via F-Type connectors J4 and J5, which

can be used to de-embed the loss of the PCB. J6

provides DC and digital inputs to the device.

The board is constructed of a four metal layer

material with a total thickness of 60 mils. To achieve

high isolation, the 75Ω transmission lines are

designed in layer 2 using a stripline waveguide

design. The board stack up for 75Ω transmission

lines has 20 mil thickness of Rogers 4350B between

layer 1 and layer 2, 20 mil thickness of Rogers

4450F between layer 2 and layer 3, and 13.3 mil

thickness of Rogers 4350B between layer 3 and

layer 4.

For the true performance of the PE42720 to be

realized, the PCB should be designed in such a way

that RF transmission lines and sensitive DC I/O

traces are heavily isolated from one another.

101-0557

Logo updated under non-rev change. Peregrine products are protected under one or more of the following U.S. Patents: http://patents.psemi.com