Impedance and polarization characteristics of H and IHI slot antennas

Slot antennas can be end loaded to tune input impedance for use with active devices and to decrease overall slot length at a given resonant frequency. Cross polarization and impedance of end-loaded slots in an H configuration are analyzed in this letter. For an H antenna of approximately equal heigh t and width, D-plane cross polarization was found to be -20 dB, and the res onant frequency decreased by 34% over a slot with a length equal to the wid th of the H. The cross polarization can he reduced with our new IHI configu ration, which is introduced in this letter Impedance at the second resonanc e can be tuned over a range of 26-82 Omega.