Beamwidth Control for Directive Antennas using RF Lens
Journal
IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
Pages
3369-3372
Date Issued
2006
Author(s)
Abstract
Broadband antennas such as horn and spirals are suitable for testing range references, direction-of-arrival estimation and other UWB applications. However, one problem with most broadband antennas is the frequency dependency of the antenna beamwidth as well as antenna gain. In this work, a beamwidth compensation measure is proposed by adding an RF lens in front of the broadband antenna. By adjusting the curvature profile, the RF lens can be made to reduce the antenna beamwidth. Simulation results show that the main beam becomes more compact after adding a spherical RF lens. Experiment results show that by adding an elongated bullet-shaped RF lens, the antenna patterns can be drastically reduced and hence improve the antenna directivity. © 2006 IEEE
SDGs
Other Subjects
Horn antennas; Lens antennas; Spiral antennas; Ultra-wideband (UWB); Antenna beamwidth; Antenna gains; Beam widths; Beamwidth control; Broad-band antenna; Compensation measures; Direction of arrival estimation; Frequency dependencies; Testing range; UWB applications; Directional patterns (antenna)
Type
conference paper