Gridded reflector antenna

摘要

A method for broadcasting a signal, and an antenna system (200) are disclosed. The antenna system comprises a feed horn (114-120; 204) and a reflector (102-108; 202). The feed horn (114-120; 204) provides a radio frequency (RF) signal. The reflector (102-108; 202) is aligned with the feed horn (114-120; 204) and is illuminated by the feed horn (114-120; 204), and comprises a reflective grid (304). The reflective grid (304) lines are substantially parallel as viewed from a geographic location of a desired output beam from the antenna system. A method in accordance with the present invention comprises illuminating (1100) a reflector (102-108; 202) with an RF signal emanating from a feed horn (114-120; 204), the feed horn (204) being substantially located at a focal point (206) of the reflector (102-108; 202), wherein the reflector (102-108; 202) comprises a reflective grid (304), and reflecting the RF signal with the reflective grid(304), wherein lines of the reflective grid (304) are substantially parallel as viewed from a geographic location of a desired output beam from the antenna system (Fig. 3). <IMAGE> <IMAGE>