Multilayer Ground Electrode Layout for Antenna Isolation

The invention transitions from a single-plane slot configuration to a multi-layer ground electrode structure with slots arranged in different spatial dimensions. The first and second slots are positioned in different ground layers, creating a three-dimensional isolation barrier that blocks radio waves more effectively while preventing rearward leakage through the stacked layer configuration.

The invention implements nested slot structures where slots are positioned within and across multiple ground layers. The first slot in the first ground layer and the second slot in the second ground layer create a nested, multi-level barrier that contains radio waves more effectively, preventing them from leaking toward the rear sides while maintaining isolation between antenna elements.

By arranging slots in multiple ground layers rather than a single plane, the invention creates a three-dimensional isolation structure that more effectively contains radio waves without disrupting the front-direction radiation pattern. The multi-layer configuration provides superior isolation while preserving the intended directivity shape.

The invention applies different slot configurations to different ground layers, with each layer's slots positioned and dimensioned to address specific isolation requirements. This localized optimization in each layer collectively achieves improved isolation while maintaining the overall directivity pattern integrity.