A half-annular corrugated all-metal leaky-wave antenna is designed based on asymmetric unit cells. The adoption of two non-identical perturbations of the metallic profile (i.e., of the groove) for each unit cell is applied to demonstrate the capability of suppressing the open stopband and thus improving the radiative performance when scanning through broadside. The use of trapezoidal grooves, which provide an asymmetric perturbation with respect to the propagation direction of the guided mode, is also considered for the same purpose. An in-house method-of-moments code is implemented and optimized to study the dispersion behavior of the relevant leaky modes, whereas the radiative performance is analyzed by full-wave simulations to validate the scanning behavior of the proposed antenna. The results show that, thanks to the one-sided configuration and a quasi-flat nonzero attenuation constant, a linear scanning behavior and almost constant gain through broadside can be achieved at terahertz frequencies with all-metal compact structures.

All-metal THz leaky-wave antenna with suppressed open stopband / Zhang, D.; Comite, D.; Deng, X.; Zheng, X.; Baccarelli, P.; Burghignoli, P.. - (2023), pp. 1-4. (Intervento presentato al convegno 17th European Conference on Antennas and Propagation, EuCAP 2023 tenutosi a Florence; Italy) [10.23919/EuCAP57121.2023.10133488].

All-metal THz leaky-wave antenna with suppressed open stopband

Zhang D.;Comite D.;Baccarelli P.;Burghignoli P.
2023

Abstract

A half-annular corrugated all-metal leaky-wave antenna is designed based on asymmetric unit cells. The adoption of two non-identical perturbations of the metallic profile (i.e., of the groove) for each unit cell is applied to demonstrate the capability of suppressing the open stopband and thus improving the radiative performance when scanning through broadside. The use of trapezoidal grooves, which provide an asymmetric perturbation with respect to the propagation direction of the guided mode, is also considered for the same purpose. An in-house method-of-moments code is implemented and optimized to study the dispersion behavior of the relevant leaky modes, whereas the radiative performance is analyzed by full-wave simulations to validate the scanning behavior of the proposed antenna. The results show that, thanks to the one-sided configuration and a quasi-flat nonzero attenuation constant, a linear scanning behavior and almost constant gain through broadside can be achieved at terahertz frequencies with all-metal compact structures.
2023
17th European Conference on Antennas and Propagation, EuCAP 2023
asymmetric perturbation; leaky-wave antennas; open stopband; terahertz antennas
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
All-metal THz leaky-wave antenna with suppressed open stopband / Zhang, D.; Comite, D.; Deng, X.; Zheng, X.; Baccarelli, P.; Burghignoli, P.. - (2023), pp. 1-4. (Intervento presentato al convegno 17th European Conference on Antennas and Propagation, EuCAP 2023 tenutosi a Florence; Italy) [10.23919/EuCAP57121.2023.10133488].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1693639
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