Antenna design in the body of a wearable device

Patent metadata

Field	Value
Publication number	US-11233317-B2
Application number	US-202016866921-A
Country	US
Kind code	B2
Filing date	May 5, 2020
Priority date	Dec 5, 2016
Publication date	Jan 25, 2022
Grant date	Jan 25, 2022

Abstract

A portable computing device includes an antenna within its housing structure for wireless connectivity, where an upper partition of the housing structure is used to construct an antenna plane, and a ground plane is incorporated into a lower partition of the housing structure. In some cases, the antenna is capable of maintaining wireless connectivity over a wide frequency band. Some embodiments include a device mount external to the upper partition and the lower partition of the housing structure that enables mounting the portable computing device to another entity, such as a user. In some cases, the device mount is external to the antenna used by the portable computing device, and does not include any portions of the antenna.

First claim

We claim:

1. A method, comprising:
using a flat metal surface of a display as an antenna plane of a Planar Inverted-F Antenna (PIFA), the flat metal surface of the display included within a housing structure of a wearable electronic device;
using a ground plane included within the housing structure and positioned substantially parallel to the antenna plane to form the PIFA; and
grounding the PIFA with a ground connection between the antenna plane and the ground plane.

2. The method of claim 1 , further comprising maintaining at least one wireless link between the wearable electronic device and another device using the PIFA.

3. The method of claim 2 , wherein the maintaining the at least one wireless link includes:
transmitting, with the PIFA, wireless signals over the at least one wireless link in a frequency range from 700 Megahertz (MHz) to 2700 MHz; and
receiving, with the PIFA, additional wireless signals over the at least one wireless link in the frequency range.

4. The method of claim 1 , further comprising maintaining a spatial gap between the antenna plane and the ground plane.

5. The method of claim 4 , further comprising determining the spatial gap based on a target resonant frequency of the PIFA.

6. The method of claim 1 , further comprising using a feed connection between the antenna plane and the ground plane to drive the PIFA with a signal to radiate.

7. The method of claim 1 , further comprising electrically connecting an outer ring of the housing structure to the flat metal surface via a number of electrical connections.

8. The method of claim 7 , wherein the number of electrical connections is based on a highest operating frequency associated with the PIFA.

9. The method of claim 1 , wherein the flat metal surface of the display being used as the antenna plane of the PIFA includes a bottom surface of a display bezel of the housing structure.

10. A method comprising:
using a flat metal surface of a display included within a wireless device as an antenna plane of a Planar Inverted-F Antenna (PIFA); and
grounding the PIFA by electrically connecting the antenna plane with a ground plane included within the wireless device and positioned generally parallel to the antenna plane.

11. The method of claim 10 , further comprising maintaining at least one wireless link between the wireless device and another device using the PIFA for transmitting and receiving wireless signals associated with the at least one wireless link.

12. The method of claim 11 , wherein the transmitting the wireless signals associated with the at least one wireless link includes driving a feed connection between the antenna plane and the ground plane with the wireless signals.

13. The method of claim 10 , further comprising maintaining a spatial gap between the antenna plane and the ground plane that is based on a target resonant frequency of the PIFA.

14. The method of claim 10 , further comprising electrically joining the flat metal surface of the display to an outer ring of the wireless device without incorporating a separate antenna.

15. The method of claim 14 , wherein the electrically joining includes connecting the outer ring to the flat metal surface with a number of electrical connections based on a highest operating frequency associated with the PIFA.

16. The method of claim 10 , further comprising forming the ground plane by metal components positioned below a top surface of a battery included in the wireless device.

17. A method comprising:
using a flat metal surface of a display included within a wireless device to form an antenna plane of a Planar Inverted-F Antenna (PIFA);
using a ground plane included within the wireless device and positioned generally parallel to the antenna plane to form the PIFA; and
maintaining at least one wireless link between the wireless device and another device using the PIFA to communicate wireless signals associated with the at least one wireless link.

18. The method of claim 17 , further comprising grounding the PIFA with a ground connection between the antenna plane and the ground plane.

19. The method of claim 17 , wherein the flat metal surface of the display being used as the antenna plane of the PIFA includes a bottom surface of a display bezel of the wireless device.

20. The method of claim 17 , wherein the maintaining the at least one wireless link includes at least one of transmitting or receiving the wireless signals over the at least one wireless link in a frequency range from 700 Megahertz (MHz) to 2700 MHz.

Assignees

• Motorola Mobility Llc

Inventors

• Coles Katherine
• Russell Michael
• Degroot Robert
• Krenz Eric

Classifications

• H01Q1/273 Primary

  Adaptation for carrying or wearing by persons or animals · CPC title

• H01Q9/0421

  with a shorting wall or a shorting pin at one end of the element (H01Q9/0414 takes precedence) · CPC title

• H01Q1/2291

  used in Bluetooth® or Wi-Fi® devices of Wireless Local Area Networks [WLAN] (H01Q1/241 takes precedence; WLAN in general H04W) · CPC title