Title :
Metasurface leaky-wave antennas: A comparison between slot and patch implementation
Author :
Faenzi, Marco ; Martini, Enrica ; Gonzalez-Ovejero, David ; Minatti, Gabriele ; De Vita, Paolo ; Sabbadini, Marco ; Maci, Stefano
Author_Institution :
Dept. of Inf. Eng. & Math., Univ. of Siena, Siena, Italy
Abstract :
This paper is devoted to the analysis and design of a high-gain circularly polarized antenna with low profile for deep space communications in the X-band. In this context, the low-mass and high efficiency requirements can be addressed at the same time by properly designing a layer of patches (slots) printed (etched) on a grounded dielectric substrate. The interaction between this layer and the surface wave launched by a simple and compact feeder leads to leaky-wave radiation. The overall structure is very light and low profile; in particular, for the slot-based solution the dielectric slab is extremely thin (0.15 mm) and characterized by a low permittivity. The design procedure is summarized, and the patch and slot layouts are shown along with their respective directivity patterns.
Keywords :
electromagnetic wave polarisation; leaky wave antennas; microstrip antennas; permittivity; slot antennas; space communication links; X-band; compact feeder; dielectric slab; dielectric substrate ground; directive patterns; high-gain circularly polarized antenna; leaky-wave radiation; low-mass requirements; metasurface leaky-wave antennas; patch implementation; patches layer; slot-based solution; slots design; space communications; Apertures; Impedance; Slabs; Surface impedance; Surface treatment; Surface waves; high gain antenna; holography; leaky waves; metasurfaces;
Conference_Titel :
Antennas and Propagation (EuCAP), 2014 8th European Conference on
Conference_Location :
The Hague
DOI :
10.1109/EuCAP.2014.6901999
