An iterative and regenerative method for sequencing DNA is described. In accordance with a preferred form of the present invention, a method includes using a first and a second node of a tree structure to represent a first and a second operation associated with the system. The thickness of the extended ground is adjusted, so that it is possible to adjust radiation efficiency of the ceramic patch antenna that operates at a specific frequency band. In an embodiment, the standoff device is integral with one of the electrical components. A processor of the system detects selection of one of the user-selectable elements, which results in a selected element. The proposed assembly improves contact, simplifies the design of such devices, and reduces their size.