Effect of extending grounded substrate beyond AMC on the performance of spiral antennas

A. Mehrabani, L. Shafai
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引用次数: 3

Abstract

Development of artificial magnetic conductor (AMC) ground planes has resulted in low profile planar antennas. Essentially, AMC structures consist of a periodic array of arbitrarily shaped patches backed by a grounded dielectric slab. Among planar antennas, the spiral antenna is an excellent candidate for circular polarization applications. In [1–5], considerable efforts have been focused on decreasing the overall height of the curl and spiral antennas. Among which, a very compact and low profile spiral antenna was designed with a distance of only 0.02λο in [5], where λο is the free-space wavelength at 4.5GHz.
将接地基板延伸至AMC以外对螺旋天线性能的影响
人工磁性导体(AMC)地平面的发展导致了低轮廓平面天线的出现。本质上,AMC结构由任意形状的片状周期性阵列组成,背后是接地的介电板。在平面天线中,螺旋天线是圆极化应用的理想选择。在[1-5]中,相当大的努力集中在降低旋度和螺旋天线的总高度上。其中,设计了一个非常紧凑的低轮廓螺旋天线,在[5]中距离仅为0.02λο,其中λο为4.5GHz的自由空间波长。
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