Design and performance of small electromagnetically coupled monopole antenna for broadband operation

被引：12
作者：
Jung, J. H.
Choo, H.
Park, I.
机构：
[1] Ajou Univ, Dept Elect & Comp Engn, Suwon 443749, South Korea
[2] Hongik Univ, Sch Elect & Elect Engn, Seoul 121791, South Korea
来源：
IET MICROWAVES ANTENNAS & PROPAGATION | 2007年 / 1卷 / 02期
关键词：
HELIX;
D O I：
10.1049/iet-map:20050065
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：
An electromagnetically coupled small broadband monopole antenna has been investigated. The antenna structure consists of a circular disk-loaded monopole and a probe with a spiral strip line monopole packed within a small electrical volume. Broad bandwidth can be achieved through electromagnetic coupling between these two monopoles that generate two resonances closely spaced in frequency. The antenna with a circular disk has an electrical size kr of 0.563 and has 430 MHz of impedance bandwidth for VSWR < 2 with a centre frequency at 2.185 GHz, which is similar or equal to 19.7% of a fractional bandwidth. Measured efficiency of the circular disk-loaded antenna is 98% at its centre band region. The gain of the antenna is > 1.55 dBi and the antenna has good omni-directional radiation characteristics.
引用
收藏
页码：536 / 541
页数：6
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