PE42720
Product Specification
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.
Figure 19. Evaluation Board Layout
101-0557
©2010-2013 Peregrine Semiconductor Corp. All rights reserved.
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