Title :
High Directivity Directional Coupler using Metamaterial
Author :
Young-Hoon Chun ; Jia-Sheng Hong ; Ju-Young Moon ; Sang-Won Yun
Author_Institution :
Dept. of Electr., Electron. & Comput. Eng., Heriot-Watt Univ., Edinburgh
Abstract :
In this paper, a novel uniplanar directional coupler using left-handed transmission lines is proposed. Short microstrip parallel coupled lines and asymmetrical delay line pairs make multi-sectioned coupler enhance the directivity as well as the coupling. Each delay line pair consists of a right-handed transmission line and a lumped left-handed transmission line. Furthermore, a Lambda/12 coupled line for the coupled line section makes the design area compact. The designed 3-section 18 dB coupler is measured at the center frequency of 2.0 GHz, which shows good agreement with the simulation result
Keywords :
metamaterials; microstrip directional couplers; microstrip lines; 2.0 GHz; delay line pairs; directional couplers; left-handed transmission lines; microstrip lines; right-handed transmission lines; Bandwidth; Coupling circuits; Delay lines; Directional couplers; Frequency; Metamaterials; Microstrip; Moon; Permittivity; Transmission lines; Directional couplers; directivity; left-handed transmission lines; metamaterial;
Conference_Titel :
Microwave Conference, 2006. 36th European
Conference_Location :
Manchester
Print_ISBN :
2-9600551-6-0
DOI :
10.1109/EUMC.2006.281323
