FULL-WAVE CHARACTERIZATION OF A THROUGH HOLE VIA USING THE MATRIX-PENCILLED MOMENT METHOD

A full wave analysis was presented in this paper for the propagation c haracteristics of a via which connects two semi-infinitely long transm ission lines through a hole in a ground plane. The current distributio n on the via and a section of transmission line became solved under th e thin wire approximation by the moment method and the scattering para meters are extracted by the matrix pencil method. Numerical results we re included to investigate the frequency dependent propagation charact eristics for via structures with various geometrical parameters, e.g. the via height, wire diameter, and via hole radius. The radiation loss was shown from a comparison with the quasi-static model to become imp ortant if the via height is larger than one tenth of a wavelength. The radiation mechanism could be mainly attributed towards the associated wire antenna structure and, at rather high frequencies, towards the a ssociated grounded via structure.