| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain the antenna system in which increase in a side lobe level of a difference pattern is prevented without deteriorating a sum pattern. SOLUTION: Plural number of element antennas 5a-5d arranged on a plane are divided into four element antenna groups 6-9 by two border lines C3, D4 formed to be X shape on ground. Feeding circuits are configured such that all the element antenna groups 6-9 are operated as to a sum pattern and only the element antenna groups in a vertical direction (groups 6, 8) or in an azimuth direction (groups 7, 9) are operated as to a difference pattern.</p> |
