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=== Gap Sources ===

A gap is an infinitesimally narrow discontinuity that is placed on the path of current flow on a feed line. In planar structures, feed lines are typically in the form of a microstrip, stripline, slotline or coplanar waveguide (CPW). You use rectangle strip objects to construct such feed lines. A gap source can be placed on any rectangle strip object on a PEC, PMC or conductive sheet trace. Depending on the type of the trace on which a gap source is placed, it will have a different physical interpretation.