Techniques and systems for analysis, diagnosis and debugging fabricated hardware designs at a Hardware Description Language level are described. The top drive structure is configured for being fixedly attached to an upper end portion of a bearing assembly and having a seal-carrying portion. Address electrodes are provided on the first substrate with a first dielectric layer over the address electrodes and the first substrate. The first pair of antenna beam shaping elements may be positioned in an offset relationship relative to the second pair of antenna beam shaping elements.