Summary
International Symposium on Antennas and Propagation
2008
Session Number:1IS01A
Session:
Number:1IS01A-2
Design of multibeam dielectric lens antennas with the fan beam by multi-objective optimization
Y. Kuwahara,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
In advanced ITS application, the radar antenna is expected to resolve several objects in the horizontal plane. These applications demand multibeam antennas. Multibeam antennas have to form high gain and low sidelobe radiation patterns at different directions. In case of the anticollision vehicular radar, a vertical sector beam will be required when considering the inclination of the road. The typical antenna with multibeam performance is the bifocal antenna with dielectric lens [1]. Though the bifocal lens is guaranteed to equalize the aperture phase distribution on the specified design directions in the scanning plane, it is not guaranteed on the transverse plane due to its astigmatism as well as the other directions. Of course, the vertical sector beam cannot be formed. No previous reports have adequately addressed these points, especially vertical sector beam. We propose an effective method to design multibeam dielectric lens antennas with the fan beam. To optimize the lens antennas balancing the gain (including pattern loss) and sidelobe level of the scanning and transverse patterns taking into account of beamwidth of the vertical pattern, the pareto-genetic algorithm [2] is introduced.