| 摘要 |
An antenna (10) suitable for use as a phased array antenna of a radar system. The antenna (10) includes a plurality of radiating elements (12), and a substrate (14) integrated waveguide (SIW) configured to form a feed network (16) to couple energy from a plurality of inputs (18) to the radiating elements (12). The feed network (16) includes over-moded waveguide couplers configured so energy propagates through an over-moded section in multiple modes, TE10 and TE20 modes for example. The feed network (16) also defines sub-arrays configured such that half of the radiators of a sub-group (22A) are shared with an adjacent sub-group (22A) of an adjacent sub-array (20A), i.e. the sub-arrays are configured to have 50% overlap. Preferably, the feed-network is formed about a single layer of substrate (14) material. |
