Title :
Improved wideband -3 dB nonuniform directional coupler
Author :
Uysal, Sener ; Aghvami, Hamid
Author_Institution :
Dept. of Electr. & Electron. Eng., Kings Coll., London, UK
fDate :
4/13/1989 12:00:00 AM
Abstract :
A 2-20 GHz, -3 dB 90-degree directional coupler is designed and built on an alumina substrate. The overall area occupied by the coupled is reduced by selecting a nonzero value for the initial coupling coefficient. A considerable improvement in the coupler performance is also achieved due to the reduced slopes of the wiggly coupled lines. Coupler design parameters and measured performance are presented.
Keywords :
directional couplers; microwave devices; strip line components; -3 dB; 2 to 20 GHz; 90 degree type; Al 2O 3; SHF; alumina substrate; design parameters; directional coupler; microstrip; microwave device; nonuniform coupler; stripline; wideband; wiggly coupled lines;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19890370
