| 摘要 |
An inexpensive, efficient, broadband, slot-type antenna with unidirectional sensitivity includes a slot-forming means (11) defining a plurality of substantially concentric and generally coplanar annular slots (12, 13) and a non-resonant antenna connection means (20) for transmitting electromagnetic energy to and from the plurality of annular slots. The antenna connection means forms a plurality of non-resonant, radially-extending cavities (21, 22) that are adapted to combine electromagnetic energy received at the plurality of concentric, annular slots substantially in phase and to divide electromagnetic energy between the plurality of concentric, annular slots for transmission from the slots generally in phase and along the central slot axis that lies perpendicular to the two concentric, annular, coplanar slots. |
