| Abstract: | An ion trap chip, which may be used for quantum information processing
and the like, includes an integrated microwave antenna. The antenna is
formed as a radiator connected by one of its ends to the center trace of
a microwave transmission line and connected by its other end to a current
return path through a ground trace of the microwave transmission line.
The radiator includes several parallel, coplanar radiator traces
connected in series. The radiator traces are connected such that they all
carry electric current in the same direction, so that collectively, they
simulate a single, unidirectionally flowing sheet of current. In
embodiments, induced currents in underlying metallization planes are
suppressed by parallel slots that extend in a direction perpendicular to
the radiator traces. |