Title :
A broad-band uniplanar branch-line coupler using a coupled rectangular slotline ring
Author :
Ho, Chien-Hsun ; Fan, Lu ; Chang, Kai
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
6/1/1993 12:00:00 AM
Abstract :
A uniplanar branch-line coupler has been developed that provides substantially improved broadband amplitude and phase characteristics when compared to conventional microstrip branch-line couplers. Experimental results show that the new coupler has over 20-dB isolation over a bandwidth of more than 40% centered at 3 GHz with +or-1-dB power dividing balance.<>
Keywords :
waveguide couplers; 3 GHz; amplitude characteristics; branch-line coupler; broadband uniplanar type; coupled rectangular slotline ring; phase characteristics; wideband type; Arm; Bandwidth; Coplanar waveguides; Coupling circuits; Frequency; Impedance; MMICs; Microstrip; Millimeter wave technology; Slotline;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
