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November 1997

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TechNet <[log in to unmask]>
Subject:
Re: Reference planes in microstrip
From:
Raymond Klein <[log in to unmask]>
Date:
Wed, 26 Nov 1997 16:16:41 -0800
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"TechNet Mail Forum." <[log in to unmask]>, Raymond Klein <[log in to unmask]>
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Andreas,

Because of bypass capacitors (both discrete and those formed by the PWB
itself) the power plane is usually at ground potential to high frequency
signals. It has the same impedance effect on miscrstrip lines as the actual
ground plane. The termination (if present) should be made to signal ground.

Ray Klein

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