Reconfigurable 3/6 dB Novel Branch Line Coupler

作     者：Tamer Gaber Abouelnaga Ashraf Shawky Mohra 

作者机构：Microstrip Circuits Department Electronics Research Institute Giza Egypt Faculty of Engineering Benha University Qalyubia Egypt 

出 版 物：《Open Journal of Antennas and Propagation》 (天线与传播（英文）)

年 卷 期：2017年第5卷第1期

页      面：7-22页

学科分类：080902[工学-电路与系统] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

主　　题：Branch Line Coupler Microstrip Lines Asymmetric Coupled Microstrip Lines 3/6 dB Coupler 

摘      要：In this paper, a new idea of reconfigurable 3/6 dB branch line coupler is proposed. The proposed coupler is tuned through a simple open and short circuit at the coupler’s branches’ edges. At the short edges case, a 3 dB branch line coupler is obtained. In this case, the coupler’s branches are considered as microstrip transmission lines with 0.3 mm slot width which is etched in each coupler’s branch. At the open edges case, the coupler’s branches are considered as asymmetric coupled microstrip lines. In this case, a 6 dB branch line coupler is obtained. Both CST and IE3D simulators are used to optimize the reconfigurable 3/6 dB branch line coupler dimensions. As a prototypes, two BLCs are designed, analyzed and tested at the “on and “off states at 2.5 GHz. The measured S-parameters confirm the proposed concept of the reconfigurable 3/6 dB branch line coupler.