Title :
Dual polarised multibeam antenna
Author :
Lindmark, B. ; Lundgren, S. ; Beckman, C.
Author_Institution :
Allgon Syst. AB, Taby, Sweden
fDate :
12/9/1999 12:00:00 AM
Abstract :
A dual polarised four-beam antenna array for the 1850-1990 MHz frequency band is presented. The polarisations are ±45° to vertical. The antenna has eight inputs corresponding to two orthogonal polarisations and four beams. The return loss and cross-polar isolation for a single Butler beam exceeds 15 and 22 dB, respectively. The radiation pattern is similar to an ideal Butler pattern and the cross-polarisation level is <-21 dB in the beams
Keywords :
UHF antennas; antenna radiation patterns; electromagnetic wave polarisation; microstrip antenna arrays; multibeam antennas; 1850 to 1990 MHz; cross-polar isolation; cross-polarisation level; dual polarised multibeam antenna; four-beam antenna array; orthogonal polarisations; radiation pattern; return loss; single Butler beam;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19991497
