SCATTERING ANALYSES OF ASYMMETRIC CONDUCTOR-BACKED CPW OPEN-END DISCONTINUITY PROBLEM

The space-domain integral equation method using the generalized scatte ring matrix description of microwave passive circuits is employed to i nvestigate the mode conversion of a CBCPW open-end discontinuity with unequal side plane widths. The conversion into two additional dominant modes, the c-mode-like mode and the pi-mode-like mode, and into the t ransmitted microstrip mode from an incident CPW mode is studied agains t side plane width, degree of asymmetry, substrate thickness, and freq uency. Theoretical results are in excellent agreement with experimenta l ones.