Title :
A switched beam antenna for hemispherical coverage
Author :
Blersch, Tobias ; Hesselbarth, Jan
Author_Institution :
Inst. of Radio Freq. Technol., Univ. of Stuttgart, Stuttgart, Germany
Abstract :
A hemispherical switched antenna array operating at 1.5 GHz is described. Nine dual-linearly polarized radiator elements are distributed over the surface of a hemisphere. A switching network can address serially all radiators, separately as well as by connecting in-phase to two neighboring radiators. This way, 15 switched beams are realized. The radiator element chosen is a crossed-dipole structure featuring about 7.5 dBi gain and an impedance bandwidth of 13%. The antenna has a diameter of about 1.75 wavelengths. Measurements of directivity distribution and polarization distribution are presented.
Keywords :
UHF antennas; antenna accessories; conformal antennas; dipole antenna arrays; direction-of-arrival estimation; directive antennas; electromagnetic wave polarisation; crossed-dipole structure; directivity distribution measurement; dual-linearly polarized radiator elements; frequency 1.5 GHz; hemispherical coverage; hemispherical switched antenna array; impedance bandwidth; polarization distribution measurement; switched beam antenna; switching network; Antenna measurements; Antennas; Arrays; Impedance; Impedance matching; Springs; Switches; conformal array; direction of arrival; polarization;
Conference_Titel :
Smart Antennas (WSA), 2012 International ITG Workshop on
Conference_Location :
Dresden
Print_ISBN :
978-1-4577-1923-3
Electronic_ISBN :
978-1-4577-1924-0
DOI :
10.1109/WSA.2012.6181203
