Selective High Impedance Surface Active Region Loading of Archimedean Spiral Antenna

被引：18

作者：

Mohamad, Sarah ^{[1
]}

Cahill, Robert ^{[1
]}

Fusco, Vincent ^{[1
]}

机构：

[1] Queens Univ Belfast, Inst Elect Commun & Informat Technol, Belfast BT3 9DT, Antrim, North Ireland

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2014年 / 13卷

关键词：

Active region; high impedance surfaces; self-complementary antennas; spiral antennas; ultrawideband (UWB) antennas; PERFORMANCE; PLANE;

D O I：

10.1109/LAWP.2014.2314860

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We show that a significant increase in the gain and front-to-back ratio is obtained when different high impedance surface (HIS) sections are placed below the active regions of an Archimedean spiral antenna. The principle of operation is demonstrated at 3, 6, and 9 GHz for an antenna design that employs a ground plane composed of two dissimilar HISs. The unit cells of the HISs are collocated and resonant at the same frequency as the 3- and 6-GHz active regions of the wideband spiral. It is shown that the former HIS must also be designed to resonate at 9 GHz to avoid the generation of a boresight null that occurs because the structure is physically large enough to support higher-order modes. The improvement that is obtained at each of the three frequencies investigated is shown by comparing the predicted and measured radiation patterns for the free space and HIS-backed antenna.

引用

页码：810 / 813

页数：4

共 12 条

[1] Side-fed bifilar helix antenna [J].