Antenna shielding in a capacitance module
An apparatus may include a substrate including a capacitance sensing electrode, an antenna on the substrate, and a shield feature between the electrodes and the antenna.
1. An apparatus, comprising:
a stack of layers;
a capacitive sensor layer in the stack of layers;
a set of electrodes on the capacitive layer;
an antenna on the capacitive layer; and
a shield feature between at least a portion of the set of electrodes and the antenna;
wherein the shield feature surrounds a portion of the set of electrodes.
2. The apparatus of claim 1 , wherein the shield feature includes a ground ring.
3. The apparatus of claim 1 , wherein the shield feature includes multiple sections.
4. The apparatus of claim 3 , wherein the multiple sections are electrically independent.
5. The apparatus of claim 3 , wherein the multiple sections are electrically connected.
6. The apparatus of claim 1 , wherein the antenna surrounds the set of electrodes on the capacitive layer.
7. The apparatus of claim 1 , wherein a portion of the shield feature is ungrounded.
8. The apparatus of claim 1 , wherein a portion of the shield feature is grounded.
9. The apparatus of claim 1 , wherein the shield feature does not overlap a portion of the set of electrodes.
10. The apparatus of claim 1 , wherein the shield feature surrounds the set of electrodes.
11. The apparatus of claim 1 , wherein the shield feature surrounds the antenna.
12. The apparatus of claim 1 , wherein the shield feature includes at least a section that is electrically conductive.
13. The apparatus of claim 1 , wherein the shield feature includes at least a section that is magnetically conductive.
14. The apparatus of claim 1 , wherein the shield feature includes at least a section that is magnetically conductive and electrically insulating.
15. The apparatus of claim 1 , wherein the shield feature includes a ferrite material.
16. The apparatus of claim 1 , wherein the stack of layers includes a first capacitive sensor layer and a second capacitive sensor layer, and the antenna is formed on at least one of the capacitive sensor layers.
17. The apparatus of claim 16 , wherein the shield feature is formed on both the first capacitive sensor layer and the second capacitive sensor layer.
18. An apparatus, comprising:
a substrate including a set of capacitance sensing electrodes;
an antenna on the substrate; and
a shield feature on the substrate between the set of electrodes and the antenna;
wherein the shield feature surrounds the set of capacitance sensing electrodes.