Design of Directional Planar and Volumetric UWB Antennas
In this chapter, both planar and volumetric ultra wideband antennas are considered as possible configurations to achieve directional radiation characteristics in UWB antennas. Like the study reported in Chapter 6, not only are the
impedance matching and phase response analyzed here, but also the radiation pattern behavior is considered. Nevertheless, provided that the considered designs have a directional radiation, different parameters should be taken into account: front to back lobe ratio (FBR), beamwidth at 3 dB or half power beamwidth (HPBW), side lobes character, and the presence of parasitic lobes.