The fence pattern 141 may include an interior-common via fence wall, which is shared by and between adjacent fence chambers. The interior-common via fence wall may have a longitudinal dimension which is generally aligned with the longitudinal dimension of the perimeter fence walls 141A and 141B, but may intersect with shared interior-fence wall 208. In FIG. 2B, via chamber 142I shares a portion of an interior common wall 202 of via fence chamber 142G and a portion of an interior common wall of via fence chamber 142H. The process allows for variation in size and placement of plated thru via holes by altering the drilling pattern of the vias. This allows for tailored isolation where needed for the specific design/frequencies by optimizing the size and location of the individual vias in the wall structure 144.

The plurality of circuit modules 120 have a circuit layout that provides some circuit modules that are generally side-by-side along a first dimension and others circuit modules are generally side-by-side along a second dimension that is perpendicular to the first dimension.

FIG. 3 illustrates a top view of a cover 150 installed on the via fence 140 of a front-end RF stage 104″.