| 摘要 |
<p>PURPOSE:To reduce the radar cross-sectional area of a planar array antenna. CONSTITUTION:The plural pieces of element antennas are divided into a first element antenna group 1a arrayed at a center part and a second element antenna group 1b arrayed at a peripheral part. The difference (d) in level is provided between a first plane 2a where the first element antenna group 1a is arrayed and a second plane 2b where the second element antenna group 1b is arrayed and the difference (d) in level is set so as to be approximately 1/4 or odd number multiple of the using wavelength of an opposite rader.</p> |
