ABSTRACT

Poly-spirals are composed of contiguously interconnected spiral elements and are ubiquitous in the monuments of various cultures since prehistoric times. In adopting poly-spiral geometries for antenna applications, we may in general choose these contiguously connected spirals to be identical or dissimilar, such as by selecting them to be of circular, eccentric, or polygonal shape. We focus on a special class of poly-spirals with circular elements, namely the Celtic-Archimedean spiral. We subsequently compare its radiation properties with those of a regular circular Archimedean of the same size and number of turns. The Celtic-Archimedean spiral could be used as a pattern and polarization diversity reconfigurable antenna due to its feeding mechanism. We compute the diversity gain provided by the Celtic-Archimedean spiral when used in a WLAN network operating at 2.4 GHz.

摘要

多螺旋体由连续相互连接的螺旋元素组成，自史前时代以来在各种文化的纪念碑中无处不在。在为天线应用采用多螺旋几何形状时，我们通常可以选择这些连续连接的螺旋为相同或不相似的螺旋，例如通过将它们选择为圆形，偏心形或多边形。我们专注于一类特殊的带有圆形元素的多螺旋体，即凯尔特人-阿希米德螺旋体。随后，我们将其辐射特性与相同大小和匝数的常规圆形阿基米德辐射特性进行比较。由于其馈电机制，凯尔特人-阿希米德螺旋可以用作方向图和极化分集可重构天线。