Title :
A novel microstrip line backward directional coupler with high directivity
Author :
Chun, Young-Hoon ; Moon, Ju-Young ; Yun, Sang-Won ; Rhee, Jin-Koo
Author_Institution :
Millimeter-wave Innovation Technol. Res. Center, Dongguk Univ., Seoul, South Korea
Abstract :
A uni-planar backward directional couplers is analyzed and designed. Microstrip parallel coupled lines and asymmetrical delay lines make multi-sectioned coupler which enhances the directivity. In this paper, 20 dB multi-sectioned couplers with single and double delay lines are designed and measured to show the validation of analysis. The coupler with two delay lines has the directivity over 30 dB and the fractional bandwidth of 30% at the center frequency of 1.8 GHz.
Keywords :
delay lines; microstrip directional couplers; microstrip lines; network analysis; 1.8 GHz; asymmetrical delay lines; directional coupler; directivity; double delay lines; microstrip coupled lines; microstrip coupler; microstrip line; multisectioned coupler; single delay lines; Bandwidth; Coupling circuits; Delay lines; Design engineering; Directional couplers; Equations; Frequency; Microstrip; Moon; Technological innovation;
Conference_Titel :
Microwave Symposium Digest, 2004 IEEE MTT-S International
Print_ISBN :
0-7803-8331-1
DOI :
10.1109/MWSYM.2004.1338977
