Folded Substrate Wireless Module Battery Shielding

The patent transitions from a planar PCB layout to a three-dimensional folded structure. The substrate is folded to create overlapping layers, allowing the battery to be positioned in a spatial relationship that provides shielding without increasing the overall device thickness in the conventional direction. This dimensional change enables the battery to serve dual purposes: power supply and electromagnetic shielding.

The folded substrate structure creates a nested configuration where components are layered over each other. The battery is nested within the folded structure, positioned between substrate layers, which provides electromagnetic shielding while maintaining a compact form factor. This nesting approach allows multiple functional layers to occupy overlapping spatial volumes.

Instead of increasing distance in the conventional planar direction, the patent uses vertical layering through folding to achieve spatial separation. The folded substrate creates multiple layers where the circuit board and antenna coil are separated by intermediate layers (including the battery) in the vertical dimension, providing interference isolation without increasing overall device thickness.

The folded substrate structure introduces intermediate layers between the antenna coil and circuit board, including the battery and substrate material itself. These intermediary layers act as barriers to electromagnetic interference, allowing the circuit and antenna to be in close proximity without direct interference, while maintaining a compact thickness profile.

The battery is designed to serve multiple functions simultaneously: providing power supply and acting as an electromagnetic shield. By positioning the battery to overlap with the circuit board in the folded structure, it blocks magnetic flux from reaching sensitive circuits without requiring additional dedicated shielding components, thereby reducing overall device complexity despite the folded substrate design.

The patent merges the power supply function and electromagnetic shielding function into a single component arrangement. The battery and substrate structure are combined to create a multi-functional assembly where the same physical structure provides both power and protection, eliminating the need for separate shielding layers and reducing component count.