This paper proposes a novel Electromagnetic Band-Gap (EBG) leaky-wave antenna (LWA) operating in the K-band with enhanced directivity at broadside. A rigorous method that combines the analysis of the band diagrams of Bloch waves propagating within two-dimensional (2-D) EBG structures and the properties of bound and leaky modes in transversely open lattice waveguides is used to design the antenna. For the first time, a three-dimensional (3-D) realistic configuration of the EBG structure is designed, manufactured, and measured in the K-band. An effective leaky-wave approach is applied in conjunction with the use of “ad-hoc" and commercial EM full-wave software for the accurate design of the structure to be realized. The prototype consists of 7 × 8 alumina cylinders positioned above a ground plane and supported by two vertical metal plates. The antenna is fed by two counterphase monopoles. A rat-race hybrid junction, located just below the antenna, feeds the two monopoles. The measurements show a very good agreement with the adopted leaky-wave model. Experimental results show a broadside directivity of 12.8 dBi and a return loss of 24 dB at the frequency of f=24.6 GHz. The design reported operates in the K-band in reason of its application for the project PRIN 2017 WPT4WID under grant 2017YJE9XK005.
Tognolatti, L., Baccarelli, P., Ponti, C., Ceccuzzi, S., Jandieri, V., Schettini, G. (2025). Dielectric EBG Leaky-Wave Antenna: Design and Experimental Validation. IEEE OPEN JOURNAL OF ANTENNAS AND PROPAGATION, 1-10 [10.1109/OJAP.2025.3564352].
Dielectric EBG Leaky-Wave Antenna: Design and Experimental Validation
Tognolatti L.;Baccarelli P.;Ponti C.;Ceccuzzi S.;Jandieri V.;Schettini G.
2025-01-01
Abstract
This paper proposes a novel Electromagnetic Band-Gap (EBG) leaky-wave antenna (LWA) operating in the K-band with enhanced directivity at broadside. A rigorous method that combines the analysis of the band diagrams of Bloch waves propagating within two-dimensional (2-D) EBG structures and the properties of bound and leaky modes in transversely open lattice waveguides is used to design the antenna. For the first time, a three-dimensional (3-D) realistic configuration of the EBG structure is designed, manufactured, and measured in the K-band. An effective leaky-wave approach is applied in conjunction with the use of “ad-hoc" and commercial EM full-wave software for the accurate design of the structure to be realized. The prototype consists of 7 × 8 alumina cylinders positioned above a ground plane and supported by two vertical metal plates. The antenna is fed by two counterphase monopoles. A rat-race hybrid junction, located just below the antenna, feeds the two monopoles. The measurements show a very good agreement with the adopted leaky-wave model. Experimental results show a broadside directivity of 12.8 dBi and a return loss of 24 dB at the frequency of f=24.6 GHz. The design reported operates in the K-band in reason of its application for the project PRIN 2017 WPT4WID under grant 2017YJE9XK005.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
