  Slot antennas are very popular microwave antennas and slotted wave guides are
used for high frequency radar systems. A thin slot in an infinite ground plane
is the complement to a dipole in free space. This was described by H.G. Booker
[2] who extended Babinet's principle from optics to show that the slot will
have the same radiation pattern as a dipole such that the E and H fields are
swapped. As a result, the polarization is rotated, so that radiation from
vertical slot is polarized horizontally. In this work we show how analytical
techniques can be used for optimization of THz slot antennas, the analysis is
then corroborated by using a numerical simulation which validates the
performance parameters predicted by the analytical technique.
