| 摘要 |
<p>A corrugated feed horn developed specifically to match a waveguide lens antenna (WGLA). For maximized efficiency the illumination taper must match the focal distance to diameter (F/D) ratio of the antenna. Also, and more important, the phase centre of the feed must coincide with the focal point of the antenna for all specified frequencies. Most lens antennas exhibit frequency dispersion to some extent i.e. the focal point changes with frequency. The phase centre shift of the described feed is designed to specifically match the frequency dispersion of the WGLA. The horn is flare angle controlled which also makes it wideband.</p> |
