  We describe an experiment to measure the electromagnetic analog of
gravitational wave memory, the so-called electromagnetic memory. Whereas
gravitational wave memory is a residual displacement of test masses,
electromagnetic memory is a residual velocity (i.e. kick) of test charges.
  The source of gravitational wave memory is energy that is not confined to any
bounded spatial region: in the case of binary black hole mergers the emitted
energy of gravitational radiation as well as the recoil energy of the final
black hole. Similarly, electromagnetic memory requires a source whose charges
are not confined to any bounded spatial region.
  While particle beams can provide unbounded charges, their currents are too
small to be practical for such an experiment. Instead we propose a short
microwave pulse applied to the center of a long dipole antenna. In this way the
measurement of the kick can be done quickly enough that the finite size of the
antenna does not come into play and it acts for our purposes the same as if it
were an infinite antenna.
