A novel terahertz (THz) Fabry-Perot cavity (FPC) antenna is proposed, based on a multistack of alternating layers of highly birefringent nematic liquid crystal (NLC) and highpermittivity dielectric, which comprehensively acts as a Bragg reflector. This layout is able to provide enhanced reconfigurability and improved directivity with respect to standard FPC leaky-wave antenna (LWA) designs. The application of a low driving voltage to the NLC layers allows for the dynamic control of the radiating properties of the LWA, at a fixed frequency in the low-THz range. The attractive features and performance of two different configurations are rigorously discussed in a theoretical context, taking into account the realistic implementation of the proposed device.
Fuscaldo, W., Tofani, S., Zografopoulos, D.C., Baccarelli, P., Burghignoli, P., Beccherelli, R., et al. (2017). Tunable Fabry-Perot cavity THz antenna based on leaky-wave propagation in nematic liquid crystals. IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, 16, 2046-2049 [10.1109/LAWP.2017.2695324].
Tunable Fabry-Perot cavity THz antenna based on leaky-wave propagation in nematic liquid crystals
Baccarelli, Paolo;Galli, Alessandro
2017
Abstract
A novel terahertz (THz) Fabry-Perot cavity (FPC) antenna is proposed, based on a multistack of alternating layers of highly birefringent nematic liquid crystal (NLC) and highpermittivity dielectric, which comprehensively acts as a Bragg reflector. This layout is able to provide enhanced reconfigurability and improved directivity with respect to standard FPC leaky-wave antenna (LWA) designs. The application of a low driving voltage to the NLC layers allows for the dynamic control of the radiating properties of the LWA, at a fixed frequency in the low-THz range. The attractive features and performance of two different configurations are rigorously discussed in a theoretical context, taking into account the realistic implementation of the proposed device.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
