Miniaturized uniplanar 180/spl deg/ hybrid-ring couplers with 0.8 /spl lambda//sub g/ and 0.67 /spl lambda//sub g/ circumferences

摘要

Two miniaturized uniplanar 180/spl deg/ hybrid-rings with 0.8 /spl lambda//sub g/ and 0.67 /spl lambda//sub g/ circumferences, respectively, are proposed. These hybrid-rings are implemented using the finite ground coplanar waveguide (FGCPW) structure. The sizes of these hybrid-rings are effectively reduced, and broadband performances are also achieved.