In this paper, we present the design of an Electromagnetic Band-Gap (EBG) leaky-wave antenna consisting of a two-dimensional lattice of dielectric cylinders above a ground plane. The radiation from an electric line source embedded in the EBG open waveguide is modeled by means of suitably excited leaky modes. An in-depth dispersive analysis has showed how a multiplicity of modes, both guided and leaky, propagates within the structure. However, by properly placing an elementary source within the lattice, a single leaky mode of the EBG structure has shown to provide a highly convergent representation of the radiated far field. Based on the knowledge of the leaky-mode attenuation constant, it is possible to truncate the structure longitudinally in order to obtain a radiation efficiency of 96 %. This study led to the design of an antenna operating at a frequency belonging to the 5G millimeter-wave bands. Excellent agreements have been obtained between the theoretical results based on leaky-wave radiation and ad-hoc and full-wave commercial simulators.
Tognolatti, L., Baccarelli, P., Ceccuzzi, S., Ponti, C., Schettini, G., Jandieri, V. (2021). Electromagnetic Band-Gap Leaky-Wave Antennas Based on Grounded Dielectric Lattices. In 2021 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, APS/URSI 2021 - Proceedings (pp.1329-1330). Institute of Electrical and Electronics Engineers Inc. [10.1109/APS/URSI47566.2021.9704541].
Electromagnetic Band-Gap Leaky-Wave Antennas Based on Grounded Dielectric Lattices
Tognolatti L.;Baccarelli P.;Ceccuzzi S.;Ponti C.;Schettini G.;Jandieri V.
2021
Abstract
In this paper, we present the design of an Electromagnetic Band-Gap (EBG) leaky-wave antenna consisting of a two-dimensional lattice of dielectric cylinders above a ground plane. The radiation from an electric line source embedded in the EBG open waveguide is modeled by means of suitably excited leaky modes. An in-depth dispersive analysis has showed how a multiplicity of modes, both guided and leaky, propagates within the structure. However, by properly placing an elementary source within the lattice, a single leaky mode of the EBG structure has shown to provide a highly convergent representation of the radiated far field. Based on the knowledge of the leaky-mode attenuation constant, it is possible to truncate the structure longitudinally in order to obtain a radiation efficiency of 96 %. This study led to the design of an antenna operating at a frequency belonging to the 5G millimeter-wave bands. Excellent agreements have been obtained between the theoretical results based on leaky-wave radiation and ad-hoc and full-wave commercial simulators.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
