Wrist-worn electronic device with housing-based loop antenna

1. A wrist-worn electronic device configured to transmit and receive wireless signals in two frequency bands, the electronic device comprising:

a housing including a bottom wall configured to contact a wearer's wrist, and a side wall with a lower edge coupled to a perimeter of the bottom wall;

a bezel loop antenna configured to wirelessly receive a first electronic signal and a second electronic signal simultaneously, the bezel loop antenna formed from electrically conductive material, having a first impedance, and positioned above an upper surface of the side wall;

a printed circuit board retaining an electrically conductive signal terminal electrically connected to a first contact point on a lower surface of the bezel loop antenna, an electrically conductive ground terminal electrically connected to a second contact point on the lower surface of the bezel loop antenna, and an electrically conductive tuning terminal electrically connected to a third contact point on the lower surface of the bezel loop antenna, the third contact point positioned between the first contact point and the second point in a counter-clockwise direction;

a first signal processing element retained on the printed circuit board and configured to process the first electronic signal having a frequency in a first frequency band;

a second signal processing element retained on the printed circuit board and configured to process the second electronic signal having a frequency in a second frequency band;

a diplexer retained on the printed circuit board, electrically connected to the first signal processing element, the second signal processing element and the signal terminal, the diplexer configured to:

receive the first electronic signal and the second electronic signal from the signal terminal, and

output the received first electronic signal to the first signal processing element and the received second electronic signal to the second signal processing element; and

a tuning element retained on the printed circuit board and electrically connected to the tuning terminal and having a second impedance causing the bezel loop antenna to wirelessly receive electronic signals in the first frequency band and electronic signals in the second frequency band.

2. The wrist-worn electronic device of claim 1 , further comprising:

a first electrically conductive element forming the electrical connection between the signal terminal and the first contact point on the bezel;

a second electrically conductive element forming the electrical connection between the ground terminal and the second contact point on the bezel loop antenna.

3. The wrist-worn electronic device of claim 1 , wherein the first frequency band is centered at approximately 1575 megahertz, and the first signal processing element is further configured to determine a current geolocation of the electronic device based on the first electronic signal.

4. The wrist-worn electronic device of claim 1 , wherein the second frequency band is centered at approximately 2.4 gigahertz, and the second signal processing element is a further configured to determine communication information based on the second electronic signal.

5. The wrist-worn electronic device of claim 1 , wherein the first electronic signal is a global navigation satellite system signal and the second electronic signal is a communication signal.

6. The wrist-worn electronic device of claim 1 , wherein the diplexer is further configured to receive the second electronic signal from the second signal processing element and output the second electronic signal to the signal terminal, and wherein the bezel loop antenna is further configured to wirelessly transmit the second electronic signal.

7. The wrist-worn electronic device of claim 1 , further comprising a tuning stub electrically connected to the bezel and extending downward therefrom in a counter-clockwise fashion, the tuning stub formed of an electrically conductive material and configured to improve the radiation performance of the bezel loop antenna receiving the first electronic signal with a circular polarization.

8. The wrist-worn electronic device of claim 7 , wherein the first electronic signal is received from a global navigation satellite system and the circular polarization is a right-hand polarization at the first frequency band.

9. A wrist-worn electronic device configured to transmit and receive wireless signals in two frequency bands, the electronic device comprising:

a housing including a bottom wall configured to contact a wearer's wrist, and a side wall with a lower edge coupled to a perimeter of the bottom wall;

a bezel loop antenna configured to wirelessly receive a first electronic signal and a second electronic signal simultaneously, the bezel loop antenna formed from electrically conductive material, having a first impedance, and positioned above an upper surface of the side wall;

a printed circuit board retaining an electrically conductive signal terminal electrically connected to a first contact point on a lower surface of the bezel loop antenna, an electrically conductive ground terminal electrically connected to a second contact point on the lower surface of the bezel loop antenna, and an electrically conductive tuning terminal electrically connected to a third contact point on the lower surface of the bezel loop antenna, the third contact point positioned between the first contact point and the second point in a counter-clockwise direction;

a location determining element retained on the printed circuit board and configured to receive the first electronic signal having a frequency in a first frequency band and determine a current geolocation of the electronic device based on the first electronic signal;

a communication element retained on the printed circuit board and configured to process a second electronic signal having a frequency in a second frequency band and determine data from a plurality of wireless communication protocols;

a diplexer retained on the printed circuit board, electrically connected to the location determining element, the communication element and the signal terminal, the diplexer configured to:

receive the first electronic signal and the second electronic signal from the signal terminal and output the received first electronic signal to the location determining element and the second electronic signal to the communication element, and

receive the second electronic signal from the communication element and output the second electronic signal to the signal terminal; and

a tuning element retained on the printed circuit board and electrically connected to the tuning terminal and having a second impedance causing the bezel loop antenna to wirelessly receive the first electronic signal in the first frequency band and the second electronic signal in the second frequency band;

wherein the bezel loop antenna is further configured to wirelessly transmit the second electronic signal.

10. The wrist-worn electronic device of claim 9 , further comprising:

a first electrically conductive element forming the electrical connection between the signal terminal and the first contact point on the bezel;

a second electrically conductive element forming the electrical connection between the ground terminal and the second contact point on the bezel.

11. The wrist-worn electronic device of claim 9 , wherein the first electronic signal is received from a global navigation satellite system and the second electronic signal is received from a mobile device.

12. The wrist-worn electronic device of claim 9 , further comprising a tuning stub formed of electrically conductive material, the tuning stub electrically connected to the bezel and extending downward therefrom in a counter-clockwise fashion.

13. The wrist-worn electronic device of claim 12 , wherein the tuning stub is configured to improve the performance of the bezel loop antenna receiving the first electronic signal with a right-hand circular polarization.

14. A wrist-worn electronic device configured to transmit and receive wireless signals in two frequency bands, the electronic device comprising:

a housing including a bottom wall configured to contact a wearer's wrist, and a side wall including a lower edge coupled to a perimeter of the bottom wall and an inner surface;

a bezel loop antenna including a portion extending in a counter-clockwise direction between a signal terminal and an electrically conductive ground terminal and configured to wirelessly receive a first electronic signal and a second electronic signal simultaneously, the bezel loop antenna formed from electrically conductive material, having a tuning stub contacting a lower surface of the bezel loop antenna at a point along the portion extending between the signal terminal and the electrically conductive ground terminal in the counter-clockwise direction, and positioned above an upper surface of the side wall;

a location determining element configured to receive the first electronic signal including a frequency in a first frequency band and determine a current geolocation of the electronic device based on the first electronic signal;

a communication element configured to process a second electronic signal including a frequency in a second frequency band and determine communication information based on the second electronic signal; and

a diplexer electrically connected to the location determining element, the communication element and the bezel loop antenna, the diplexer configured to receive the first electronic signal and the second electronic signal from the signal terminal of the bezel loop antenna and output the received first electronic signal to the location determining element and the second electronic signal to the communication element;

wherein the tuning stub is positioned against the inner surface of the side wall and extends downward from the bezel loop antenna in a counter-clockwise fashion and causes the bezel loop antenna to have a right-hand circular polarization at the first frequency band.

15. The wrist-worn electronic device of claim 14 , wherein a first end of the tuning stub contacts the lower surface of the bezel loop antenna.

16. The wrist-worn electronic device of claim 15 , further comprising a printed circuit board including a plurality of electrically conductive terminals, wherein a second end of the tuning stub is positioned along an inner surface of the side wall above the printed circuit board.

17. The wrist-worn electronic device of claim 16 , wherein the second end of the tuning stub is positioned in a counterclockwise position relative to the first end of the tuning stub.

18. The wrist-worn electronic device of claim 16 , wherein the second end of the tuning stub is electrically isolated from the printed circuit board.

19. The wrist-worn electronic device of claim 16 , further comprising a tuning element retained on the printed circuit board and electrically connected to one of the plurality of electrically conductive terminals, wherein the tuning element introduces a second resonance causing the bezel loop antenna to wirelessly receive electronic signals in the first frequency band and electronic signals in the second frequency band simultaneously.

20. The wrist-worn electronic device of claim 14 , wherein the tuning stub is formed of an electrically conductive material.