Title :
Printed annular metasurface for omnidirectional dual-pol leaky-wave antennas
Author :
Baccarelli, P. ; Burghignoli, P. ; Comite, D. ; Di Ruscio, David ; Galli, A. ; Lampariello, P. ; Jackson, David R.
Author_Institution :
Inf. Eng., Electron. & Telecomm. Dept., Sapienza Univ. of Rome, Rome, Italy
Abstract :
A printed annular metasurface (PAM) consisting of suitably designed concentric ring slots etched in a metal screen is proposed to realize two-dimensional leaky-wave antennas (LWAs) operating on a pair of azimuthally independent TM and TE cylindrical leaky modes. The metasurface, used as a superstrate for a grounded dielectric slab, is designed to obtain the desired wavenumbers for the two leaky modes. These are excited independently by means of a vertical coaxial probe and a horizontal microstrip loop, thus allowing for radiation of an omnidirectional conical beam with given beam angle and polarization. Theoretical and numerical investigations are presented, including an ad-hoc moment-method approach for the calculation of the antenna far-field patterns.
Keywords :
antenna radiation patterns; leaky wave antennas; loop antennas; method of moments; microstrip antennas; omnidirectional antennas; LWA; PAM; TE cylindrical leaky mode; TM cylindrical leaky mode; ad hoc moment-method approach; antenna far-field patterns; beam angle; concentric ring slots; grounded dielectric slab; horizontal microstrip loop; numerical investigation; omnidirectional conical beam radiation; omnidirectional dual-pol leaky-wave antennas; polarization; printed annular metasurface; superstrate; theoretical investigation; two-dimensional leaky-wave antennas; vertical coaxial probe; Antenna radiation patterns; Directive antennas; Leaky wave antennas; Metals; Method of moments; Microstrip; Dual polarization; Leaky waves; Leaky-wave antennas; Metasurfaces; Omnidirectional antennas;
Conference_Titel :
Microwave Conference (EuMC), 2013 European
Conference_Location :
Nuremberg
