Circularly polarised proximity-fed microstrip antenna with polarisation switching ability

被引：6
作者：
Simba, A. Y. [1 ]
Yamamoto, M.
Nojima, T.
Itoh, K.
机构：
[1] Natl Inst Informat & Commun Technol, EMC Grp, Tokyo, Japan
[2] Hokkaido Univ, Grad Sch Informat Sci & Technol, Div Media & Network Technol, Kita Ku, Sapporo, Hokkaido 0600814, Japan
[3] Tomakomai Natl Coll Technol, Tomakomai 0591275, Japan
来源：
IET MICROWAVES ANTENNAS & PROPAGATION | 2007年 / 1卷 / 03期
关键词：
D O I：
10.1049/iet-map:20050273
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：
The authors propose a design of a circularly polarised proximity-fed microstrip antenna having polarisation switching ability. The proposed antenna has a simple structure, consisting of a truncated-comers square patch in the same plane with a microstrip feed line extended beyond the patch edge, pin diode and a pad connected to a ground by a conducting post. The diode, which is inserted between the end of the feed line and a pad, is used to control feed line termination. By turning the diode on or off, this antenna can radiate either right hand or left hand circular polarisation. Furthermore, we present a technique to improve the input characteristics of the antenna. It involves two diode-controlled tuning stubs connected in shunt with the feed line. Finally, a discussion on how the diode characteristics affect the structure and results of the antenna is given. All analyses are carried out using finite-difference time-domain technique and confirmed by measurements in the 5 GHz band. A good agreement between the simulated and measured results was obtained.
引用
收藏
页码：658 / 665
页数：8
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