A compact enhanced-bandwidth hybrid ring using an artificial lumped-element left-handed transmission-line section

被引：168
作者：
Okabe, H [1 ]
Caloz, C
Itoh, T
机构：
[1] Hitachi Ltd, Commun Devices Res Dept, Cent Res Lab, Tokyo 1858601, Japan
[2] Calif State Univ Los Angeles, Dept Elect Engn, Los Angeles, CA 90032 USA
来源：
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2004年 / 52卷 / 03期
关键词：
hybrid ring; left-handed (LH) material; LH transmission line (TL);
D O I：
10.1109/TMTT.2004.823541
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：
A new type of compact enhanced-bandwidth hybrid ring using an artificial lumped-element left-handed (LH) transmission-line (TL) section is proposed. The replacement of the 270degrees branch of the conventional hybrid ring by a -90degrees LH-TL branch results in both size reduction and bandwidth enhancement. The working principle of the LH TL used in the hybrid ring is explained and the performances of the component are demonstrated by measurement results. The proposed hybrid exhibits 67% size reduction compared to the conventional one, and shows a 58% and 49% bandwidth enhancements at 2 GHz in the 180degrees-out-of-phase and in-phase operations, respectively.
引用
收藏
页码：798 / 804
页数：7
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