Title :
Novel uniplanar 180° hybrid-ring couplers with spiral-type phase inverters
Author :
Kao, Chih-Wai ; Chen, Chun Hsiung
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
10/1/2000 12:00:00 AM
Abstract :
Novel uniplanar 180° hybrid-ring couplers consisting of coplanar-waveguide (CPW) rings and spiral-type phase inverters are proposed. In this study, CPW phase inverters with single-spiral and twin-spiral type slotline short stubs are utilized to design the hybrid-ring couplers. Specifically, two hybrid-ring couplers with 33% (single-spiral type) and 40% (twin-spiral type) bandwidths are implemented and examined, theoretically and experimentally
Keywords :
MMIC; UHF couplers; UHF integrated circuits; coplanar waveguide components; microwave integrated circuits; slot line components; waveguide couplers; 180 degree hybrid-ring couplers; CPW phase inverter; CPW rings; coplanar-waveguide rings; slotline short stubs; spiral-type phase inverters; uniplanar hybrid-ring couplers; Bandwidth; Coplanar waveguides; Couplers; Inverters; MMICs; Microwave antenna arrays; Microwave integrated circuits; Monolithic integrated circuits; Phased arrays; Slotline;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
