At 12:35 PM 3/29/97 -0400, Ron Yanuszewski wrote:
>Technetters:
>
>IPC-D-330, para. 4.2.5.1, the formula for a microstip is:
>
>Zo = 87•ln [5.98 H/(0.8W + T)]/(Er + 1.41)0.5 [ohms].  What does the
>[ohms] mean or contribute?
>
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        The "[ohms]" refers to the units that the final answer results in,
ie, when you plug in all the numbers with the proper units, Zo will be
given in ohms.  In this case, proper units for H, W, and T are any length
unit so long as all three are expressed in the _same_ unit of measure.  Er
has no units.
        Howard Feldmesser
        The Johns Hopkins University Applied Physics Laboratory


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