Tightly Coupled Directional Coupler Using Slotted-Microstrip Line

被引：27
|
作者：
Nasr, Abdelhamid M. H. [1 ]
Safwat, Amr M. E. [1 ]
机构：
[1] Ain Shams Univ, Elect & Elect Commun Engn Dept, Fac Engn, Cairo 11517, Egypt
来源：
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2018年 / 66卷 / 10期
关键词：
Directional couplers (DCs); equivalent circuit model microstrip; slotline and slotted-microstrip; DESIGN;
D O I：
10.1109/TMTT.2018.2847696
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：
This paper presents the theory and implementation of a novel microstrip directional coupler (DC) with a high coupling coefficient that can achieve the value of 0 dB. The coupling region is a slotted-microstrip line that supports two modes, even and odd. The geometry of the slotted-microstrip line facilitates the phase velocity compensation, which improves the isolation and directivity. A 3-dB coupler is fabricated and characterized. Measurements and electromagnetic simulations are in a good agreement with the theoretical predictions. They show that the proposed DC has 52% +/- 1 dB coupling coefficient fractional bandwidth centered around 2.4 GHz with isolation and return loss better than 25 dB.
引用
收藏
页码：4462 / 4470
页数：9
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