Analysis of Symmetric and Asymmetric Coupled Suspended Striplines and Some Associated Discontinuities

The dominant and higher order modes in both symmetric and asymmetric coupled suspended striplines are precisely described from a thorough Spectral-Domain Approach (SDA). It is shown that complex modes can exist in asymmetric suspended striplines. Scattering parameters of the dominant mode in the Ka band are presented for the discontinuity formed between an asymmetric suspended stripline and two asymmetric coupled suspended striplines and for that formed between symmetric and asymmetric coupled suspended striplines using a combination of the SDA and the modal analysis.