(IEEE, 2006) Sáenz Sáinz, Elena; Ederra Urzainqui, Íñigo; Gonzalo García, Ramón; Maagt, Peter de; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
In this paper a comparison between the measured radiation performances of a single dipole and a dipole with
a left handed superstrate based on a finite periodic repetition of a unit cell is presented. First of all the return losses and
resonant frequency of the dipole has been measured for different sizes of the superstrate, having a good impedance
matching and a decrease in the resonant frequency as the number of cells increase. By using an anechoic chamber and a
receiver horn antenna, the power transmitted at boresight has been measured for different frequencies, observing a
filtering behaviour due to the resonant characteristic of the superstrate and an improvement of the power transmitted at
the resonant frequency of around 3 dB. Comparing the H and E plane radiation patterns of a dipole and the dipole with
superstrate, more symmetrical and directive radiation patterns can be observed. Finally, a comparison between the
simulated and measured aperture efficiency is presented with a good agreement.
