Stacked Antenna Structure Using Zero-Current Zone Isolation

The patent transitions from a planar side-by-side antenna arrangement to a three-dimensional stacked configuration. The first and second antennas are disposed on different surfaces of the supporting module (first surface and second surface respectively), utilizing the vertical dimension to achieve spatial separation. This dimensional change allows the antennas to be closer in overall footprint while maintaining adequate isolation through the supporting module structure and ground plane separation.

The patent introduces a supporting module as an intermediary structure between the two antennas. This supporting module includes a ground plane that electrically connects to both antennas, serving as a mediator that provides isolation while maintaining electrical connectivity. The supporting module acts as a buffer that prevents direct interference between the antennas while enabling their compact stacked arrangement.

The supporting module serves multiple functions simultaneously: it provides mechanical support for both antennas, establishes electrical connectivity through the ground plane, provides isolation between the antennas, and enables the compact stacked configuration. By making the supporting module multi-functional, the patent eliminates the need for separate dedicated isolation components that would increase the overall size.

The patent merges the isolation function with the supporting structure itself. Rather than adding separate isolation components between the antennas, the supporting module's ground plane and structural design inherently provide the isolation function. This merging of support and isolation functions into a single integrated structure reduces the overall antenna size while maintaining effective isolation.