Title :
A 64-element array antenna for 58 GHz
Author :
Sehm, T. ; Lehto, A. ; Raisanen, A.V.
Author_Institution :
Radio Lab., Helsinki Univ. of Technol., Espoo, Finland
Abstract :
A planar array of box horns is presented for the frequency band 57.2-58.2 GHz. The horns are fed in parallel with a waveguide feed network. Improved T-junctions are used to connect the waveguides. The horns are divided into two subarrays shifted sideways in order to reduce the grating lobe in the H-plane, which is due to the large element spacing. The radiation pattern of the horn is also optimized to reduce H-plane sidelobe levels. The measured H-plane sidelobe level is below -35 dB at angles larger than 18/spl deg/ from boresight with a gain higher than 31 dBi. The measured return loss exceeds 17 dB over the band 57.2-58.2 GHz.
Keywords :
antenna feeds; antenna radiation patterns; horn antennas; losses; millimetre wave antenna arrays; planar antenna arrays; waveguide components; waveguide junctions; 57.2 to 58.2 GHz; 64-element array antenna; EHF; H-plane; H-plane sidelobe levels reduction; T-junctions; boresight; box horns; element spacing; frequency band; grating lobe reduction; measured H-plane sidelobe level; measured return loss; planar array; radiation pattern; subarrays; waveguide feed network; Antenna arrays; Arrayed waveguide gratings; Feeds; Frequency; Phased arrays; Planar arrays; Planar transmission lines; Power transmission lines; Propagation losses; Rectangular waveguides;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1999. IEEE
Conference_Location :
Orlando, FL, USA
Print_ISBN :
0-7803-5639-x
DOI :
10.1109/APS.1999.789375
