Title :
A dual reflector antenna for omnidirectional coverage
Author :
Orefice, M. ; Pirinoli, P.
Author_Institution :
Dipartimento di Elettronica, Politecnico di Torino, Italy
fDate :
June 28 1993-July 2 1993
Abstract :
A new type of omnidirectional antenna is presented, consisting of a parabolic reflector and a conical reflector, arranged to radiate, with a proper choice of the feed, vertical polarization in the horizontal plane. The main characteristics of this antenna are the following: a radiated field which is vertically polarized; very low losses; a higher bandwidth with respect to an array; good matching at several frequencies (for a feed diameter ranging from 1 to 2 /spl lambda/), in a relatively wide bandwidth; the possibility of obtaining a prescribed power density distribution in the elevation angle by appropriately shaping the conical reflector; and ease of manufacture.<>
Keywords :
antenna radiation patterns; electromagnetic wave polarisation; impedance matching; reflector antennas; bandwidth; characteristics; conical reflector; dual reflector antenna; losses; matching; omnidirectional antenna; parabolic reflector; power density distribution; vertical polarization; Antenna accessories; Antenna arrays; Antenna feeds; Bandwidth; Coaxial components; Dipole antennas; Directive antennas; Frequency; Polarization; Reflector antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1993. AP-S. Digest
Conference_Location :
Ann Arbor, MI, USA
Print_ISBN :
0-7803-1246-5
DOI :
10.1109/APS.1993.385351
