Radiating structure with integrated proximity sensing
A wireless transmission system disclosed herein includes a radiating structure integrated into a computing device case that substantially encloses electronics of a computing device. The radiating structure includes an insulator that forms a boundary with the metal plate on the computing device case. A proximity sensor collects data from an exposure point located within the radiating structure.
1. A system comprising:
a radiating structure including a radiating exterior surface of a computing device case that substantially encloses electronics of a computing device, the radiating structure further including an insulator; and
a proximity sensor positioned to detect proximity of an object via an exposure point located on the radiating structure.
2. The system of claim 1 wherein the exposure point is located on the insulator.
3. The system of claim 1 wherein the exposure point is located on the computing device case.
4. The system of claim 1 wherein the radiating structure includes a metal plate bounded by the insulator, the metal plate performing a radiating function of the radiating structure, the exposure point being located on the metal plate.
5. The system of claim 4 further comprising:
a capacitance sensing circuit configured to detect a change in capacitance between the metal plate and the object, wherein the exposure point includes a surface of the metal plate forming a part of the computing device.
6. The system of claim 5 further comprising:
a first inductor and a second inductor in series between the metal plate and the capacitance sensing circuit, the first inductor having a lower inductance value than an inductance value of the second inductor.
7. The system of claim 4 further comprising:
an inductor and a resistor in series between the metal plate and the capacitance sensing circuit, the resistor being closer to the capacitance sensing circuit than the inductor.
8. The system of claim 1 wherein the exposure point is a region on a translucent surface.
9. The system of claim 8 wherein the proximity sensor collects data through the translucent surface.
10. The system of claim 1 wherein the radiating exterior surface of the radiating structure is a metal plate.
11. The system of claim 1 further comprising:
control circuitry configured to alter transmission power of the radiating structure responsive to a measurement of the proximity sensor satisfying a human proximity condition.
12. A method comprising:
forming a radiating structure including a radiating exterior surface of into a computing device case that substantially encloses electronics of a computing device, the radiating structure further including an insulator; and
detecting proximity of an object by collecting proximity data from an exposure point located within the radiating structure.
13. The method of claim 12 further comprising:
responsive to the detection operation, altering a transmission power of the radiating structure, if a human proximity condition is satisfied.
14. The method of claim 12 wherein collecting the data further comprises:
measuring a change in capacitance between a metal plate and the object, wherein the metal plate performs a radiating function of the radiating structure and includes the exposure point.
15. The method of claim 12 wherein the proximity sensor is an infrared sensor.
16. The method of claim 12 wherein the exposure point is located on the insulator.
17. The method of claim 12 wherein the exposure point is located on the computing device case.
18. The method of claim 12 wherein the radiating structure includes a metal plate bounded by the insulator, the metal plate performing a radiating function of the radiating structure, the exposure point being located on the metal plate.
19. A device comprising:
an insulator;
a radiating structure integrated into a computing device case that substantially encloses electronics of a computing device, the radiating structure including a metal plate bounded by the insulator that performs a radiating function of the radiating structure;
a capacitance sensing circuit configured to detect a change in capacitance between the metal plate and an object; and
a first inductor and a second inductor in series between the metal plate and the capacitance sensing circuit the first inductor having a lower inductance value than an inductance value of the second inductor.
20. The device of claim 19 wherein the capacitance sensing circuit comprises an analog sense circuit and firmware, the capacitance sensing circuit is further configured to discern between different types of objects.